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Diffstat (limited to '')
| -rw-r--r-- | toolkit/crashreporter/nsExceptionHandler.cpp | 3864 |
1 files changed, 3864 insertions, 0 deletions
diff --git a/toolkit/crashreporter/nsExceptionHandler.cpp b/toolkit/crashreporter/nsExceptionHandler.cpp new file mode 100644 index 0000000000..aca9248147 --- /dev/null +++ b/toolkit/crashreporter/nsExceptionHandler.cpp @@ -0,0 +1,3864 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "nsExceptionHandler.h" +#include "nsExceptionHandlerUtils.h" + +#include "nsAppDirectoryServiceDefs.h" +#include "nsComponentManagerUtils.h" +#include "nsDirectoryServiceDefs.h" +#include "nsDirectoryService.h" +#include "nsString.h" +#include "nsTHashMap.h" +#include "mozilla/ArrayUtils.h" +#include "mozilla/DebugOnly.h" +#include "mozilla/EnumeratedRange.h" +#include "mozilla/Services.h" +#include "nsIObserverService.h" +#include "mozilla/Unused.h" +#include "mozilla/UniquePtr.h" +#include "mozilla/Printf.h" +#include "mozilla/RuntimeExceptionModule.h" +#include "mozilla/ScopeExit.h" +#include "mozilla/Sprintf.h" +#include "mozilla/StaticMutex.h" +#include "mozilla/SyncRunnable.h" +#include "mozilla/TimeStamp.h" + +#include "nsPrintfCString.h" +#include "nsThreadUtils.h" +#include "nsThread.h" +#include "jsfriendapi.h" +#include "private/pprio.h" +#include "base/process_util.h" +#include "common/basictypes.h" + +#if defined(XP_WIN) +# ifdef WIN32_LEAN_AND_MEAN +# undef WIN32_LEAN_AND_MEAN +# endif + +# include "nsXULAppAPI.h" +# include "nsIXULAppInfo.h" +# include "nsIWindowsRegKey.h" +# include "breakpad-client/windows/crash_generation/client_info.h" +# include "breakpad-client/windows/crash_generation/crash_generation_server.h" +# include "breakpad-client/windows/handler/exception_handler.h" +# include <dbghelp.h> +# include <string.h> +# include "nsDirectoryServiceUtils.h" + +# include "nsWindowsDllInterceptor.h" +# include "mozilla/WindowsDllBlocklist.h" +# include "mozilla/WindowsVersion.h" +# include "psapi.h" // For PERFORMANCE_INFORMATION and K32GetPerformanceInfo() +#elif defined(XP_MACOSX) +# include "breakpad-client/mac/crash_generation/client_info.h" +# include "breakpad-client/mac/crash_generation/crash_generation_server.h" +# include "breakpad-client/mac/handler/exception_handler.h" +# include <string> +# include <Carbon/Carbon.h> +# include <CoreFoundation/CoreFoundation.h> +# include <crt_externs.h> +# include <fcntl.h> +# include <mach/mach.h> +# include <mach/vm_statistics.h> +# include <sys/sysctl.h> +# include <sys/types.h> +# include <spawn.h> +# include <unistd.h> +# include "mac_utils.h" +#elif defined(XP_LINUX) +# include "nsIINIParser.h" +# include "common/linux/linux_libc_support.h" +# include "third_party/lss/linux_syscall_support.h" +# include "breakpad-client/linux/crash_generation/client_info.h" +# include "breakpad-client/linux/crash_generation/crash_generation_server.h" +# include "breakpad-client/linux/handler/exception_handler.h" +# include "common/linux/eintr_wrapper.h" +# include <fcntl.h> +# include <sys/types.h> +# include "sys/sysinfo.h" +# include <sys/wait.h> +# include <unistd.h> +#else +# error "Not yet implemented for this platform" +#endif // defined(XP_WIN) + +#ifdef MOZ_CRASHREPORTER_INJECTOR +# include "InjectCrashReporter.h" +using mozilla::InjectCrashRunnable; +#endif + +#include <stdlib.h> +#include <time.h> +#include <prenv.h> +#include <prio.h> +#include "mozilla/Mutex.h" +#include "nsDebug.h" +#include "nsCRT.h" +#include "nsIFile.h" +#include <map> +#include <vector> + +#include "mozilla/IOInterposer.h" +#include "mozilla/mozalloc_oom.h" + +#if defined(XP_MACOSX) +CFStringRef reporterClientAppID = CFSTR("org.mozilla.crashreporter"); +#endif +#if defined(MOZ_WIDGET_ANDROID) +# include "common/linux/file_id.h" +#endif + +using google_breakpad::ClientInfo; +using google_breakpad::CrashGenerationServer; +#ifdef XP_LINUX +using google_breakpad::MinidumpDescriptor; +#elif defined(XP_WIN) +using google_breakpad::ExceptionHandler; +#endif +#if defined(MOZ_WIDGET_ANDROID) +using google_breakpad::auto_wasteful_vector; +using google_breakpad::FileID; +using google_breakpad::kDefaultBuildIdSize; +using google_breakpad::PageAllocator; +#endif +using namespace mozilla; + +namespace CrashReporter { + +#ifdef XP_WIN +typedef wchar_t XP_CHAR; +typedef std::wstring xpstring; +# define XP_TEXT(x) L##x +# define CONVERT_XP_CHAR_TO_UTF16(x) x +# define XP_STRLEN(x) wcslen(x) +# define my_strlen strlen +# define my_memchr memchr +# define CRASH_REPORTER_FILENAME u"crashreporter.exe"_ns +# define XP_PATH_SEPARATOR L"\\" +# define XP_PATH_SEPARATOR_CHAR L'\\' +# define XP_PATH_MAX (MAX_PATH + 1) +// "<reporter path>" "<minidump path>" +# define CMDLINE_SIZE ((XP_PATH_MAX * 2) + 6) +# define XP_TTOA(time, buffer) _i64toa((time), (buffer), 10) +# define XP_STOA(size, buffer) _ui64toa((size), (buffer), 10) +#else +typedef char XP_CHAR; +typedef std::string xpstring; +# define XP_TEXT(x) x +# define CONVERT_XP_CHAR_TO_UTF16(x) NS_ConvertUTF8toUTF16(x) +# define CRASH_REPORTER_FILENAME u"crashreporter"_ns +# define XP_PATH_SEPARATOR "/" +# define XP_PATH_SEPARATOR_CHAR '/' +# define XP_PATH_MAX PATH_MAX +# ifdef XP_LINUX +# define XP_STRLEN(x) my_strlen(x) +# define XP_TTOA(time, buffer) \ + my_u64tostring(uint64_t(time), (buffer), sizeof(buffer)) +# define XP_STOA(size, buffer) \ + my_u64tostring((size), (buffer), sizeof(buffer)) +# else +# define XP_STRLEN(x) strlen(x) +# define XP_TTOA(time, buffer) sprintf(buffer, "%" PRIu64, uint64_t(time)) +# define XP_STOA(size, buffer) sprintf(buffer, "%zu", size_t(size)) +# define my_strlen strlen +# define my_memchr memchr +# define sys_close close +# define sys_fork fork +# define sys_open open +# define sys_read read +# define sys_write write +# endif +#endif // XP_WIN + +#if defined(__GNUC__) +# define MAYBE_UNUSED __attribute__((unused)) +#else +# define MAYBE_UNUSED +#endif // defined(__GNUC__) + +#ifndef XP_LINUX +static const XP_CHAR dumpFileExtension[] = XP_TEXT(".dmp"); +#endif + +static const XP_CHAR extraFileExtension[] = XP_TEXT(".extra"); +static const XP_CHAR memoryReportExtension[] = XP_TEXT(".memory.json.gz"); +static xpstring* defaultMemoryReportPath = nullptr; + +static const char kCrashMainID[] = "crash.main.3\n"; + +static google_breakpad::ExceptionHandler* gExceptionHandler = nullptr; +static mozilla::Atomic<bool> gEncounteredChildException(false); + +static xpstring pendingDirectory; +static xpstring crashReporterPath; +static xpstring memoryReportPath; + +// Where crash events should go. +static xpstring eventsDirectory; + +// If this is false, we don't launch the crash reporter +static bool doReport = true; + +// if this is true, we pass the exception on to the OS crash reporter +static bool showOSCrashReporter = false; + +// The time of the last recorded crash, as a time_t value. +static time_t lastCrashTime = 0; +// The pathname of a file to store the crash time in +static XP_CHAR lastCrashTimeFilename[XP_PATH_MAX] = {0}; + +#if defined(MOZ_WIDGET_ANDROID) +// on Android 4.2 and above there is a user serial number associated +// with the current process that gets lost when we fork so we need to +// explicitly pass it to am +static char* androidUserSerial = nullptr; + +// Before Android 8 we needed to use "startservice" to start the crash reporting +// service. After Android 8 we need to use "start-foreground-service" +static const char* androidStartServiceCommand = nullptr; +#endif + +// this holds additional data sent via the API +static Mutex* crashReporterAPILock; +static Mutex* notesFieldLock; +static AnnotationTable crashReporterAPIData_Table; +static nsCString* notesField = nullptr; +static bool isGarbageCollecting; +static uint32_t eventloopNestingLevel = 0; +static time_t inactiveStateStart = 0; + +static +#if defined(XP_UNIX) + pthread_t +#elif defined(XP_WIN) // defined(XP_UNIX) + DWORD +#endif // defined(XP_WIN) + gMainThreadId = 0; + +// Avoid a race during application termination. +static Mutex* dumpSafetyLock; +static bool isSafeToDump = false; + +// Whether to include heap regions of the crash context. +static bool sIncludeContextHeap = false; + +// OOP crash reporting +static CrashGenerationServer* crashServer; // chrome process has this +static StaticMutex processMapLock MOZ_UNANNOTATED; +static std::map<ProcessId, PRFileDesc*> processToCrashFd; + +static std::terminate_handler oldTerminateHandler = nullptr; + +#if defined(XP_WIN) || defined(XP_MACOSX) +// If crash reporting is disabled, we hand out this "null" pipe to the +// child process and don't attempt to connect to a parent server. +static const char kNullNotifyPipe[] = "-"; +static char* childCrashNotifyPipe; + +#elif defined(XP_LINUX) +static int serverSocketFd = -1; +static int clientSocketFd = -1; + +// On Linux these file descriptors are created in the parent process and +// remapped in the child ones. See PosixProcessLauncher::DoSetup() for more +// details. +static FileHandle gMagicChildCrashReportFd = +# if defined(MOZ_WIDGET_ANDROID) + // On android the fd is set at the time of child creation. + kInvalidFileHandle +# else + 4 +# endif // defined(MOZ_WIDGET_ANDROID) + ; +#endif + +static FileHandle gChildCrashAnnotationReportFd = +#if (defined(XP_LINUX) || defined(XP_MACOSX)) && !defined(MOZ_WIDGET_ANDROID) + 7 +#else + kInvalidFileHandle +#endif + ; + +// |dumpMapLock| must protect all access to |pidToMinidump|. +static Mutex* dumpMapLock; +struct ChildProcessData : public nsUint32HashKey { + explicit ChildProcessData(KeyTypePointer aKey) + : nsUint32HashKey(aKey), + sequence(0), + annotations(nullptr), + minidumpOnly(false) +#ifdef MOZ_CRASHREPORTER_INJECTOR + , + callback(nullptr) +#endif + { + } + + nsCOMPtr<nsIFile> minidump; + // Each crashing process is assigned an increasing sequence number to + // indicate which process crashed first. + uint32_t sequence; + UniquePtr<AnnotationTable> annotations; + bool minidumpOnly; // If true then no annotations are present +#ifdef MOZ_CRASHREPORTER_INJECTOR + InjectorCrashCallback* callback; +#endif +}; + +typedef nsTHashtable<ChildProcessData> ChildMinidumpMap; +static ChildMinidumpMap* pidToMinidump; +static uint32_t crashSequence; +static bool OOPInitialized(); + +#ifdef MOZ_CRASHREPORTER_INJECTOR +static nsIThread* sInjectorThread; + +class ReportInjectedCrash : public Runnable { + public: + explicit ReportInjectedCrash(uint32_t pid) + : Runnable("ReportInjectedCrash"), mPID(pid) {} + + NS_IMETHOD Run() override; + + private: + uint32_t mPID; +}; +#endif // MOZ_CRASHREPORTER_INJECTOR + +void RecordMainThreadId() { + gMainThreadId = +#if defined(XP_UNIX) + pthread_self() +#elif defined(XP_WIN) // defined(XP_UNIX) + GetCurrentThreadId() +#endif // defined(XP_WIN) + ; +} + +bool SignalSafeIsMainThread() { + // We can't rely on NS_IsMainThread() because we are in a signal handler, and + // sTLSIsMainThread is a thread local variable and it can be lazy allocated + // i.e., we could hit code path where this variable has not been accessed + // before and needs to be allocated right now, which will lead to spinlock + // deadlock effectively hanging the process, as in bug 1756407. + +#if defined(XP_UNIX) + pthread_t th = pthread_self(); + return pthread_equal(th, gMainThreadId); +#elif defined(XP_WIN) // defined(XP_UNIX) + DWORD th = GetCurrentThreadId(); + return th == gMainThreadId; +#endif // defined(XP_WIN) +} + +#if defined(XP_WIN) +// the following are used to prevent other DLLs reverting the last chance +// exception handler to the windows default. Any attempt to change the +// unhandled exception filter or to reset it is ignored and our crash +// reporter is loaded instead (in case it became unloaded somehow) +typedef LPTOP_LEVEL_EXCEPTION_FILTER(WINAPI* SetUnhandledExceptionFilter_func)( + LPTOP_LEVEL_EXCEPTION_FILTER lpTopLevelExceptionFilter); +static WindowsDllInterceptor::FuncHookType<SetUnhandledExceptionFilter_func> + stub_SetUnhandledExceptionFilter; +static LPTOP_LEVEL_EXCEPTION_FILTER previousUnhandledExceptionFilter = nullptr; +static WindowsDllInterceptor gKernel32Intercept; +static bool gBlockUnhandledExceptionFilter = true; + +static LPTOP_LEVEL_EXCEPTION_FILTER GetUnhandledExceptionFilter() { + // Set a dummy value to get the current filter, then restore + LPTOP_LEVEL_EXCEPTION_FILTER current = SetUnhandledExceptionFilter(nullptr); + SetUnhandledExceptionFilter(current); + return current; +} + +static LPTOP_LEVEL_EXCEPTION_FILTER WINAPI patched_SetUnhandledExceptionFilter( + LPTOP_LEVEL_EXCEPTION_FILTER lpTopLevelExceptionFilter) { + if (!gBlockUnhandledExceptionFilter) { + // don't intercept + return stub_SetUnhandledExceptionFilter(lpTopLevelExceptionFilter); + } + + if (lpTopLevelExceptionFilter == previousUnhandledExceptionFilter) { + // OK to swap back and forth between the previous filter + previousUnhandledExceptionFilter = + stub_SetUnhandledExceptionFilter(lpTopLevelExceptionFilter); + return previousUnhandledExceptionFilter; + } + + // intercept attempts to change the filter + return nullptr; +} + +# if defined(HAVE_64BIT_BUILD) +static LPTOP_LEVEL_EXCEPTION_FILTER sUnhandledExceptionFilter = nullptr; + +static long JitExceptionHandler(void* exceptionRecord, void* context) { + EXCEPTION_POINTERS pointers = {(PEXCEPTION_RECORD)exceptionRecord, + (PCONTEXT)context}; + return sUnhandledExceptionFilter(&pointers); +} + +static void SetJitExceptionHandler() { + sUnhandledExceptionFilter = GetUnhandledExceptionFilter(); + if (sUnhandledExceptionFilter) + js::SetJitExceptionHandler(JitExceptionHandler); +} +# endif + +/** + * Reserve some VM space. In the event that we crash because VM space is + * being leaked without leaking memory, freeing this space before taking + * the minidump will allow us to collect a minidump. + * + * This size is bigger than xul.dll plus some extra for MinidumpWriteDump + * allocations. + */ +static const SIZE_T kReserveSize = 0x5000000; // 80 MB +static void* gBreakpadReservedVM; +#endif + +#ifdef XP_LINUX +static inline void my_u64tostring(uint64_t aValue, char* aBuffer, + size_t aBufferLength) { + my_memset(aBuffer, 0, aBufferLength); + my_uitos(aBuffer, aValue, my_uint_len(aValue)); +} +#endif + +#ifdef XP_WIN +static void CreateFileFromPath(const xpstring& path, nsIFile** file) { + NS_NewLocalFile(nsDependentString(path.c_str()), false, file); +} + +static xpstring* CreatePathFromFile(nsIFile* file) { + nsAutoString path; + nsresult rv = file->GetPath(path); + if (NS_FAILED(rv)) { + return nullptr; + } + return new xpstring(static_cast<wchar_t*>(path.get()), path.Length()); +} +#else +static void CreateFileFromPath(const xpstring& path, nsIFile** file) { + NS_NewNativeLocalFile(nsDependentCString(path.c_str()), false, file); +} + +MAYBE_UNUSED static xpstring* CreatePathFromFile(nsIFile* file) { + nsAutoCString path; + nsresult rv = file->GetNativePath(path); + if (NS_FAILED(rv)) { + return nullptr; + } + return new xpstring(path.get(), path.Length()); +} +#endif + +static time_t GetCurrentTimeForCrashTime() { +#ifdef XP_LINUX + struct kernel_timeval tv; + sys_gettimeofday(&tv, nullptr); + return tv.tv_sec; +#else + return time(nullptr); +#endif +} + +static XP_CHAR* Concat(XP_CHAR* str, const XP_CHAR* toAppend, size_t* size) { + size_t appendLen = XP_STRLEN(toAppend); + if (appendLen >= *size) { + appendLen = *size - 1; + } + + memcpy(str, toAppend, appendLen * sizeof(XP_CHAR)); + str += appendLen; + *str = '\0'; + *size -= appendLen; + + return str; +} + +void AnnotateOOMAllocationSize(size_t size) { gOOMAllocationSize = size; } + +static size_t gTexturesSize = 0; + +void AnnotateTexturesSize(size_t size) { gTexturesSize = size; } + +#ifndef XP_WIN +// Like Windows CopyFile for *nix +// +// This function is not declared static even though it's not used outside of +// this file because of an issue in Fennec which prevents breakpad's exception +// handler from invoking the MinidumpCallback function. See bug 1424304. +bool copy_file(const char* from, const char* to) { + const int kBufSize = 4096; + int fdfrom = sys_open(from, O_RDONLY, 0); + if (fdfrom < 0) { + return false; + } + + bool ok = false; + + int fdto = sys_open(to, O_WRONLY | O_CREAT, 0666); + if (fdto < 0) { + sys_close(fdfrom); + return false; + } + + char buf[kBufSize]; + while (true) { + int r = sys_read(fdfrom, buf, kBufSize); + if (r == 0) { + ok = true; + break; + } + if (r < 0) { + break; + } + char* wbuf = buf; + while (r) { + int w = sys_write(fdto, wbuf, r); + if (w > 0) { + r -= w; + wbuf += w; + } else if (errno != EINTR) { + break; + } + } + if (r) { + break; + } + } + + sys_close(fdfrom); + sys_close(fdto); + + return ok; +} +#endif + +/** + * The PlatformWriter class provides a tool to create and write to a file that + * is safe to call from within an exception handler. To use it this way the + * file path needs to be provided as a bare C string. + */ +class PlatformWriter { + public: + PlatformWriter() : mBuffer{}, mPos(0), mFD(kInvalidFileHandle) {} + explicit PlatformWriter(const XP_CHAR* aPath) : PlatformWriter() { + Open(aPath); + } + + ~PlatformWriter() { + if (Valid()) { + Flush(); +#ifdef XP_WIN + CloseHandle(mFD); +#elif defined(XP_UNIX) + sys_close(mFD); +#endif + } + } + + void Open(const XP_CHAR* aPath) { +#ifdef XP_WIN + mFD = CreateFile(aPath, GENERIC_WRITE, 0, nullptr, CREATE_ALWAYS, + FILE_ATTRIBUTE_NORMAL, nullptr); +#elif defined(XP_UNIX) + mFD = sys_open(aPath, O_WRONLY | O_CREAT | O_TRUNC, 0600); +#endif + } + + void OpenHandle(FileHandle aFD) { mFD = aFD; } + bool Valid() { return mFD != kInvalidFileHandle; } + + void WriteBuffer(const char* aBuffer, size_t aLen) { + if (!Valid()) { + return; + } + + while (aLen-- > 0) { + WriteChar(*aBuffer++); + } + } + + void WriteString(const char* aStr) { WriteBuffer(aStr, my_strlen(aStr)); } + + template <int N> + void WriteLiteral(const char (&aStr)[N]) { + WriteBuffer(aStr, N - 1); + } + + FileHandle FileDesc() { return mFD; } + + private: + PlatformWriter(const PlatformWriter&) = delete; + + const PlatformWriter& operator=(const PlatformWriter&) = delete; + + void WriteChar(char aChar) { + if (mPos == kBufferSize) { + Flush(); + } + + mBuffer[mPos++] = aChar; + } + + void Flush() { + if (mPos > 0) { + char* buffer = mBuffer; + size_t length = mPos; + while (length > 0) { +#ifdef XP_WIN + DWORD written_bytes = 0; + if (!WriteFile(mFD, buffer, length, &written_bytes, nullptr)) { + break; + } +#elif defined(XP_UNIX) + ssize_t written_bytes = sys_write(mFD, buffer, length); + if (written_bytes < 0) { + if (errno == EAGAIN) { + continue; + } + + break; + } +#endif + buffer += written_bytes; + length -= written_bytes; + } + + mPos = 0; + } + } + + static const size_t kBufferSize = 512; + + char mBuffer[kBufferSize]; + size_t mPos; + FileHandle mFD; +}; + +class JSONAnnotationWriter : public AnnotationWriter { + public: + explicit JSONAnnotationWriter(PlatformWriter& aPlatformWriter) + : mWriter(aPlatformWriter), mEmpty(true) { + mWriter.WriteBuffer("{", 1); + } + + ~JSONAnnotationWriter() { mWriter.WriteBuffer("}", 1); } + + void Write(Annotation aAnnotation, const char* aValue, + size_t aLen = 0) override { + size_t len = aLen ? aLen : my_strlen(aValue); + const char* annotationStr = AnnotationToString(aAnnotation); + + WritePrefix(); + mWriter.WriteBuffer(annotationStr, my_strlen(annotationStr)); + WriteSeparator(); + WriteEscapedString(aValue, len); + WriteSuffix(); + }; + + void Write(Annotation aAnnotation, uint64_t aValue) override { + char buffer[32] = {}; + XP_STOA(aValue, buffer); + Write(aAnnotation, buffer); + }; + + private: + void WritePrefix() { + if (mEmpty) { + mWriter.WriteBuffer("\"", 1); + mEmpty = false; + } else { + mWriter.WriteBuffer(",\"", 2); + } + } + + void WriteSeparator() { mWriter.WriteBuffer("\":\"", 3); } + void WriteSuffix() { mWriter.WriteBuffer("\"", 1); } + void WriteEscapedString(const char* aStr, size_t aLen) { + for (size_t i = 0; i < aLen; i++) { + uint8_t c = aStr[i]; + if (c <= 0x1f || c == '\\' || c == '\"') { + mWriter.WriteBuffer("\\u00", 4); + WriteHexDigitAsAsciiChar((c & 0x00f0) >> 4); + WriteHexDigitAsAsciiChar(c & 0x000f); + } else { + mWriter.WriteBuffer(aStr + i, 1); + } + } + } + + void WriteHexDigitAsAsciiChar(uint8_t u) { + char buf[1]; + buf[0] = static_cast<unsigned>((u < 10) ? '0' + u : 'a' + (u - 10)); + mWriter.WriteBuffer(buf, 1); + } + + PlatformWriter& mWriter; + bool mEmpty; +}; + +class BinaryAnnotationWriter : public AnnotationWriter { + public: + explicit BinaryAnnotationWriter(PlatformWriter& aPlatformWriter) + : mPlatformWriter(aPlatformWriter) {} + + void Write(Annotation aAnnotation, const char* aValue, + size_t aLen = 0) override { + uint64_t len = aLen ? aLen : my_strlen(aValue); + mPlatformWriter.WriteBuffer((const char*)&aAnnotation, sizeof(aAnnotation)); + mPlatformWriter.WriteBuffer((const char*)&len, sizeof(len)); + mPlatformWriter.WriteBuffer(aValue, len); + }; + + void Write(Annotation aAnnotation, uint64_t aValue) override { + char buffer[32] = {}; + XP_STOA(aValue, buffer); + Write(aAnnotation, buffer); + }; + + private: + PlatformWriter& mPlatformWriter; +}; + +#ifdef MOZ_PHC +// The stack traces are encoded as a comma-separated list of decimal +// (not hexadecimal!) addresses, e.g. "12345678,12345679,12345680". +static void WritePHCStackTrace(AnnotationWriter& aWriter, + const Annotation aName, + const Maybe<phc::StackTrace>& aStack) { + if (aStack.isNothing()) { + return; + } + + // 21 is the max length of a 64-bit decimal address entry, including the + // trailing comma or '\0'. And then we add another 32 just to be safe. + char addrsString[mozilla::phc::StackTrace::kMaxFrames * 21 + 32]; + char addrString[32]; + char* p = addrsString; + *p = 0; + for (size_t i = 0; i < aStack->mLength; i++) { + if (i != 0) { + strcat(addrsString, ","); + p++; + } + XP_STOA(uintptr_t(aStack->mPcs[i]), addrString); + strcat(addrsString, addrString); + } + aWriter.Write(aName, addrsString); +} + +static void WritePHCAddrInfo(AnnotationWriter& writer, + const phc::AddrInfo* aAddrInfo) { + // Is this a PHC allocation needing special treatment? + if (aAddrInfo && aAddrInfo->mKind != phc::AddrInfo::Kind::Unknown) { + const char* kindString; + switch (aAddrInfo->mKind) { + case phc::AddrInfo::Kind::Unknown: + kindString = "Unknown(?!)"; + break; + case phc::AddrInfo::Kind::NeverAllocatedPage: + kindString = "NeverAllocatedPage"; + break; + case phc::AddrInfo::Kind::InUsePage: + kindString = "InUsePage(?!)"; + break; + case phc::AddrInfo::Kind::FreedPage: + kindString = "FreedPage"; + break; + case phc::AddrInfo::Kind::GuardPage: + kindString = "GuardPage"; + break; + default: + kindString = "Unmatched(?!)"; + break; + } + writer.Write(Annotation::PHCKind, kindString); + writer.Write(Annotation::PHCBaseAddress, uintptr_t(aAddrInfo->mBaseAddr)); + writer.Write(Annotation::PHCUsableSize, aAddrInfo->mUsableSize); + + WritePHCStackTrace(writer, Annotation::PHCAllocStack, + aAddrInfo->mAllocStack); + WritePHCStackTrace(writer, Annotation::PHCFreeStack, aAddrInfo->mFreeStack); + } +} +#endif + +/** + * If minidump_id is null, we assume that dump_path contains the full + * dump file path. + */ +static void OpenAPIData(PlatformWriter& aWriter, const XP_CHAR* dump_path, + const XP_CHAR* minidump_id = nullptr) { + static XP_CHAR extraDataPath[XP_PATH_MAX]; + size_t size = XP_PATH_MAX; + XP_CHAR* p; + if (minidump_id) { + p = Concat(extraDataPath, dump_path, &size); + p = Concat(p, XP_PATH_SEPARATOR, &size); + p = Concat(p, minidump_id, &size); + } else { + p = Concat(extraDataPath, dump_path, &size); + // Skip back past the .dmp extension, if any. + if (*(p - 4) == XP_TEXT('.')) { + p -= 4; + size += 4; + } + } + Concat(p, extraFileExtension, &size); + aWriter.Open(extraDataPath); +} + +#ifdef XP_WIN +static void AnnotateMemoryStatus(AnnotationWriter& aWriter) { + MEMORYSTATUSEX statex; + statex.dwLength = sizeof(statex); + if (GlobalMemoryStatusEx(&statex)) { + aWriter.Write(Annotation::SystemMemoryUsePercentage, statex.dwMemoryLoad); + aWriter.Write(Annotation::TotalVirtualMemory, statex.ullTotalVirtual); + aWriter.Write(Annotation::AvailableVirtualMemory, statex.ullAvailVirtual); + aWriter.Write(Annotation::TotalPhysicalMemory, statex.ullTotalPhys); + aWriter.Write(Annotation::AvailablePhysicalMemory, statex.ullAvailPhys); + } + + PERFORMANCE_INFORMATION info; + if (K32GetPerformanceInfo(&info, sizeof(info))) { + aWriter.Write(Annotation::TotalPageFile, info.CommitLimit * info.PageSize); + aWriter.Write(Annotation::AvailablePageFile, + (info.CommitLimit - info.CommitTotal) * info.PageSize); + } +} +#elif XP_MACOSX +// Extract the total physical memory of the system. +static void WritePhysicalMemoryStatus(AnnotationWriter& aWriter) { + uint64_t physicalMemoryByteSize = 0; + const size_t NAME_LEN = 2; + int name[NAME_LEN] = {/* Hardware */ CTL_HW, + /* 64-bit physical memory size */ HW_MEMSIZE}; + size_t infoByteSize = sizeof(physicalMemoryByteSize); + if (sysctl(name, NAME_LEN, &physicalMemoryByteSize, &infoByteSize, + /* We do not replace data */ nullptr, + /* We do not replace data */ 0) != -1) { + aWriter.Write(Annotation::TotalPhysicalMemory, physicalMemoryByteSize); + } +} + +// Extract available and purgeable physical memory. +static void WriteAvailableMemoryStatus(AnnotationWriter& aWriter) { + auto host = mach_host_self(); + vm_statistics64_data_t stats; + unsigned int count = HOST_VM_INFO64_COUNT; + if (host_statistics64(host, HOST_VM_INFO64, (host_info64_t)&stats, &count) == + KERN_SUCCESS) { + aWriter.Write(Annotation::AvailablePhysicalMemory, + stats.free_count * vm_page_size); + aWriter.Write(Annotation::PurgeablePhysicalMemory, + stats.purgeable_count * vm_page_size); + } +} + +// Extract the status of the swap. +static void WriteSwapFileStatus(AnnotationWriter& aWriter) { + const size_t NAME_LEN = 2; + int name[] = {/* Hardware */ CTL_VM, + /* 64-bit physical memory size */ VM_SWAPUSAGE}; + struct xsw_usage swapUsage; + size_t infoByteSize = sizeof(swapUsage); + if (sysctl(name, NAME_LEN, &swapUsage, &infoByteSize, + /* We do not replace data */ nullptr, + /* We do not replace data */ 0) != -1) { + aWriter.Write(Annotation::AvailableSwapMemory, swapUsage.xsu_avail); + } +} +static void AnnotateMemoryStatus(AnnotationWriter& aWriter) { + WritePhysicalMemoryStatus(aWriter); + WriteAvailableMemoryStatus(aWriter); + WriteSwapFileStatus(aWriter); +} + +#elif XP_LINUX + +static void AnnotateMemoryStatus(AnnotationWriter& aWriter) { + // We can't simply call `sysinfo` as this requires libc. + // So we need to parse /proc/meminfo. + + // We read the entire file to memory prior to parsing + // as it makes the parser code a little bit simpler. + // As /proc/meminfo is synchronized via `proc_create_single`, + // there's no risk of race condition regardless of how we + // read it. + + // The buffer in which we're going to load the entire file. + // A typical size for /proc/meminfo is 1KiB, so 4KiB should + // be large enough until further notice. + const size_t BUFFER_SIZE_BYTES = 4096; + char buffer[BUFFER_SIZE_BYTES]; + + size_t bufferLen = 0; + { + // Read and load into memory. + int fd = sys_open("/proc/meminfo", O_RDONLY, /* chmod */ 0); + if (fd == -1) { + // No /proc/meminfo? Well, fail silently. + return; + } + auto Guard = MakeScopeExit([fd]() { mozilla::Unused << sys_close(fd); }); + + ssize_t bytesRead = 0; + do { + if ((bytesRead = sys_read(fd, buffer + bufferLen, + BUFFER_SIZE_BYTES - bufferLen)) < 0) { + if ((errno == EAGAIN) || (errno == EINTR)) { + continue; + } + + // Cannot read for some reason. Let's give up. + return; + } + + bufferLen += bytesRead; + + if (bufferLen == BUFFER_SIZE_BYTES) { + // The file is too large, bail out + return; + } + } while (bytesRead != 0); + } + + // Each line of /proc/meminfo looks like + // SomeLabel: number unit + // The last line is empty. + // Let's write a parser. + // Note that we don't care about writing a normative parser, so + // we happily skip whitespaces without checking that it's necessary. + + // A stack-allocated structure containing a 0-terminated string. + // We could avoid the memory copies and make it a slice at the cost + // of a slightly more complicated parser. Since we're not in a + // performance-critical section, we didn't. + struct DataBuffer { + DataBuffer() : data{0}, pos(0) {} + // Clear the buffer. + void reset() { + pos = 0; + data[0] = 0; + } + // Append a character. + // + // In case of error (if c is '\0' or the buffer is full), does nothing. + void append(char c) { + if (c == 0 || pos >= sizeof(data) - 1) { + return; + } + data[pos++] = c; + data[pos] = 0; + } + // Compare the buffer against a nul-terminated string. + bool operator==(const char* s) const { + for (size_t i = 0; i < pos; ++i) { + if (s[i] != data[i]) { + // Note: Since `data` never contains a '0' in positions [0,pos) + // this will bailout once we have reached the end of `s`. + return false; + } + } + return true; + } + + // A NUL-terminated string of `pos + 1` chars (the +1 is for the 0). + char data[256]; + + // Invariant: < 256. + size_t pos; + }; + + // A DataBuffer holding the string representation of a non-negative number. + struct NumberBuffer : DataBuffer { + // If possible, convert the string into a number. + // Returns `true` in case of success, `false` in case of failure. + bool asNumber(size_t* number) { + int result; + if (!my_strtoui(&result, data)) { + return false; + } + *number = result; + return true; + } + }; + + // A DataBuffer holding the string representation of a unit. As of this + // writing, we only support unit `kB`, which seems to be the only unit used in + // `/proc/meminfo`. + struct UnitBuffer : DataBuffer { + // If possible, convert the string into a multiplier, e.g. `kB => 1024`. + // Return `true` in case of success, `false` in case of failure. + bool asMultiplier(size_t* multiplier) { + if (*this == "kB") { + *multiplier = 1024; + return true; + } + // Other units don't seem to be specified/used. + return false; + } + }; + + // The state of the mini-parser. + enum class State { + // Reading the label, including the trailing ':'. + Label, + // Reading the number, ignoring any whitespace. + Number, + // Reading the unit, ignoring any whitespace. + Unit, + }; + + // A single measure being read from /proc/meminfo, e.g. + // the total physical memory available on the system. + struct Measure { + Measure() : state(State::Label) {} + // Reset the measure for a new read. + void reset() { + state = State::Label; + label.reset(); + number.reset(); + unit.reset(); + } + // Attempt to convert the measure into a number. + // Return `true` if both the number and the multiplier could be + // converted, `false` otherwise. + // In case of overflow, produces the maximal possible `size_t`. + bool asValue(size_t* result) { + size_t numberAsSize = 0; + if (!number.asNumber(&numberAsSize)) { + return false; + } + size_t unitAsMultiplier = 0; + if (!unit.asMultiplier(&unitAsMultiplier)) { + return false; + } + if (numberAsSize * unitAsMultiplier >= numberAsSize) { + *result = numberAsSize * unitAsMultiplier; + } else { + // Overflow. Unlikely, but just in case, let's return + // the maximal possible value. + *result = size_t(-1); + } + return true; + } + + // The label being read, e.g. `MemFree`. Does not include the trailing ':'. + DataBuffer label; + + // The number being read, e.g. "1024". + NumberBuffer number; + + // The unit being read, e.g. "kB". + UnitBuffer unit; + + // What we're reading at the moment. + State state; + }; + + // A value we wish to store for later processing. + // e.g. to compute `AvailablePageFile`, we need to + // store `CommitLimit` and `Committed_AS`. + struct ValueStore { + ValueStore() : value(0), found(false) {} + size_t value; + bool found; + }; + ValueStore commitLimit; + ValueStore committedAS; + ValueStore memTotal; + ValueStore swapTotal; + + // The current measure. + Measure measure; + + for (size_t pos = 0; pos < size_t(bufferLen); ++pos) { + const char c = buffer[pos]; + switch (measure.state) { + case State::Label: + if (c == ':') { + // We have finished reading the label. + measure.state = State::Number; + } else { + measure.label.append(c); + } + break; + case State::Number: + if (c == ' ') { + // Ignore whitespace + } else if ('0' <= c && c <= '9') { + // Accumulate numbers. + measure.number.append(c); + } else { + // We have jumped to the unit. + measure.unit.append(c); + measure.state = State::Unit; + } + break; + case State::Unit: + if (c == ' ') { + // Ignore whitespace + } else if (c == '\n') { + // Flush line. + // - If this one of the measures we're interested in, write it. + // - Once we're done, reset the parser. + auto Guard = MakeScopeExit([&measure]() { measure.reset(); }); + + struct PointOfInterest { + // The label we're looking for, e.g. "MemTotal". + const char* label; + // If non-nullptr, store the value at this address. + ValueStore* dest; + // If other than Annotation::Count, write the value for this + // annotation. + Annotation annotation; + }; + const PointOfInterest POINTS_OF_INTEREST[] = { + {"MemTotal", &memTotal, Annotation::TotalPhysicalMemory}, + {"MemFree", nullptr, Annotation::AvailablePhysicalMemory}, + {"MemAvailable", nullptr, Annotation::AvailableVirtualMemory}, + {"SwapFree", nullptr, Annotation::AvailableSwapMemory}, + {"SwapTotal", &swapTotal, Annotation::Count}, + {"CommitLimit", &commitLimit, Annotation::Count}, + {"Committed_AS", &committedAS, Annotation::Count}, + }; + for (const auto& pointOfInterest : POINTS_OF_INTEREST) { + if (measure.label == pointOfInterest.label) { + size_t value; + if (measure.asValue(&value)) { + if (pointOfInterest.dest != nullptr) { + pointOfInterest.dest->found = true; + pointOfInterest.dest->value = value; + } + if (pointOfInterest.annotation != Annotation::Count) { + aWriter.Write(pointOfInterest.annotation, value); + } + } + break; + } + } + // Otherwise, ignore. + } else { + measure.unit.append(c); + } + break; + } + } + + if (commitLimit.found && committedAS.found) { + // If available, attempt to determine the available virtual memory. + // As `commitLimit` is not guaranteed to be larger than `committedAS`, + // we return `0` in case the commit limit has already been exceeded. + uint64_t availablePageFile = (committedAS.value <= commitLimit.value) + ? (commitLimit.value - committedAS.value) + : 0; + aWriter.Write(Annotation::AvailablePageFile, availablePageFile); + } + if (memTotal.found && swapTotal.found) { + // If available, attempt to determine the available virtual memory. + aWriter.Write(Annotation::TotalPageFile, memTotal.value + swapTotal.value); + } +} + +#else + +static void AnnotateMemoryStatus(AnnotationTable&) { + // No memory data for other platforms yet. +} + +#endif // XP_WIN || XP_MACOSX || XP_LINUX || else + +#if !defined(MOZ_WIDGET_ANDROID) + +/** + * Launches the program specified in aProgramPath with aMinidumpPath as its + * sole argument. + * + * @param aProgramPath The path of the program to be launched + * @param aMinidumpPath The path of the minidump file, passed as an argument + * to the launched program + */ +static bool LaunchProgram(const XP_CHAR* aProgramPath, + const XP_CHAR* aMinidumpPath) { +# ifdef XP_WIN + XP_CHAR cmdLine[CMDLINE_SIZE]; + XP_CHAR* p; + + size_t size = CMDLINE_SIZE; + p = Concat(cmdLine, L"\"", &size); + p = Concat(p, aProgramPath, &size); + p = Concat(p, L"\" \"", &size); + p = Concat(p, aMinidumpPath, &size); + Concat(p, L"\"", &size); + + PROCESS_INFORMATION pi = {}; + STARTUPINFO si = {}; + si.cb = sizeof(si); + + // If CreateProcess() fails don't do anything. + if (CreateProcess( + /* lpApplicationName */ nullptr, (LPWSTR)cmdLine, + /* lpProcessAttributes */ nullptr, /* lpThreadAttributes */ nullptr, + /* bInheritHandles */ FALSE, + NORMAL_PRIORITY_CLASS | CREATE_NO_WINDOW | CREATE_BREAKAWAY_FROM_JOB, + /* lpEnvironment */ nullptr, /* lpCurrentDirectory */ nullptr, &si, + &pi)) { + CloseHandle(pi.hProcess); + CloseHandle(pi.hThread); + } +# elif defined(XP_MACOSX) + pid_t pid = 0; + char* const my_argv[] = {const_cast<char*>(aProgramPath), + const_cast<char*>(aMinidumpPath), nullptr}; + + char** env = nullptr; + char*** nsEnv = _NSGetEnviron(); + if (nsEnv) { + env = *nsEnv; + } + + int rv = posix_spawnp(&pid, my_argv[0], nullptr, nullptr, my_argv, env); + + if (rv != 0) { + return false; + } +# else // !XP_MACOSX + pid_t pid = sys_fork(); + + if (pid == -1) { + return false; + } else if (pid == 0) { + Unused << execl(aProgramPath, aProgramPath, aMinidumpPath, nullptr); + _exit(1); + } +# endif // XP_MACOSX + + return true; +} + +#else + +/** + * Launch the crash reporter activity on Android + * + * @param aProgramPath The path of the program to be launched + * @param aMinidumpPath The path to the crash minidump file + */ + +static bool LaunchCrashHandlerService(const XP_CHAR* aProgramPath, + const XP_CHAR* aMinidumpPath) { + static XP_CHAR extrasPath[XP_PATH_MAX]; + size_t size = XP_PATH_MAX; + + XP_CHAR* p = Concat(extrasPath, aMinidumpPath, &size); + p = Concat(p - 3, "extra", &size); + + pid_t pid = sys_fork(); + + if (pid == -1) + return false; + else if (pid == 0) { + // Invoke the crash handler service using am + if (androidUserSerial) { + Unused << execlp("/system/bin/am", "/system/bin/am", + androidStartServiceCommand, "--user", androidUserSerial, + "-a", "org.mozilla.gecko.ACTION_CRASHED", "-n", + aProgramPath, "--es", "minidumpPath", aMinidumpPath, + "--es", "extrasPath", extrasPath, "--ez", "fatal", + "true", "--es", "processType", "MAIN", (char*)0); + } else { + Unused << execlp( + "/system/bin/am", "/system/bin/am", androidStartServiceCommand, "-a", + "org.mozilla.gecko.ACTION_CRASHED", "-n", aProgramPath, "--es", + "minidumpPath", aMinidumpPath, "--es", "extrasPath", extrasPath, + "--ez", "fatal", "true", "--es", "processType", "MAIN", (char*)0); + } + _exit(1); + + } else { + // We need to wait on the 'am start' command above to finish, otherwise + // everything will be killed by the ActivityManager as soon as the signal + // handler exits + int status; + Unused << HANDLE_EINTR(sys_waitpid(pid, &status, __WALL)); + } + + return true; +} + +#endif + +static void WriteMainThreadRunnableName(AnnotationWriter& aWriter) { +#ifdef MOZ_COLLECTING_RUNNABLE_TELEMETRY + // Only try to collect this information if the main thread is crashing. + if (!SignalSafeIsMainThread()) { + return; + } + + // NOTE: Use `my_memchr` over `strlen` to ensure we don't run off the end of + // the buffer if it contains no null bytes. This is used instead of `strnlen`, + // as breakpad's linux support library doesn't export a `my_strnlen` function. + const char* buf = nsThread::sMainThreadRunnableName.begin(); + size_t len = nsThread::kRunnableNameBufSize; + if (const void* end = my_memchr(buf, '\0', len)) { + len = static_cast<const char*>(end) - buf; + } + + if (len > 0) { + aWriter.Write(Annotation::MainThreadRunnableName, buf, len); + } +#endif +} + +static void WriteOOMAllocationSize(AnnotationWriter& aWriter) { + if (gOOMAllocationSize) { + aWriter.Write(Annotation::OOMAllocationSize, gOOMAllocationSize); + } +} + +static void WriteMozCrashReason(AnnotationWriter& aWriter) { + if (gMozCrashReason != nullptr) { + aWriter.Write(Annotation::MozCrashReason, gMozCrashReason); + } +} + +static void WriteAnnotations(AnnotationWriter& aWriter, + const AnnotationTable& aAnnotations) { + for (auto key : MakeEnumeratedRange(Annotation::Count)) { + const nsCString& value = aAnnotations[key]; + if (!value.IsEmpty()) { + aWriter.Write(key, value.get(), value.Length()); + } + } +} + +static void WriteSynthesizedAnnotations(AnnotationWriter& aWriter) { + AnnotateMemoryStatus(aWriter); +} + +static void WriteAnnotationsForMainProcessCrash(PlatformWriter& pw, + const phc::AddrInfo* addrInfo, + time_t crashTime) { + JSONAnnotationWriter writer(pw); + WriteAnnotations(writer, crashReporterAPIData_Table); + WriteSynthesizedAnnotations(writer); + writer.Write(Annotation::CrashTime, uint64_t(crashTime)); + + if (inactiveStateStart) { + writer.Write(Annotation::LastInteractionDuration, + crashTime - inactiveStateStart); + } + + double uptimeTS = (TimeStamp::NowLoRes() - TimeStamp::ProcessCreation()) + .ToSecondsSigDigits(); + char uptimeTSString[64] = {}; + SimpleNoCLibDtoA(uptimeTS, uptimeTSString, sizeof(uptimeTSString)); + writer.Write(Annotation::UptimeTS, uptimeTSString); + + // calculate time since last crash (if possible). + if (lastCrashTime != 0) { + uint64_t timeSinceLastCrash = crashTime - lastCrashTime; + + if (timeSinceLastCrash != 0) { + writer.Write(Annotation::SecondsSinceLastCrash, timeSinceLastCrash); + } + } + + if (isGarbageCollecting) { + writer.Write(Annotation::IsGarbageCollecting, "1"); + } + + if (eventloopNestingLevel > 0) { + writer.Write(Annotation::EventLoopNestingLevel, eventloopNestingLevel); + } + +#if defined(XP_WIN) && defined(HAS_DLL_BLOCKLIST) + // HACK: The DLL blocklist code will manually write its annotations as JSON + DllBlocklist_WriteNotes(writer); +#endif // defined(XP_WIN) && defined(HAS_DLL_BLOCKLIST) + + WriteMozCrashReason(writer); + + WriteMainThreadRunnableName(writer); + + WriteOOMAllocationSize(writer); + + if (gTexturesSize) { + writer.Write(Annotation::TextureUsage, gTexturesSize); + } + +#ifdef MOZ_PHC + WritePHCAddrInfo(writer, addrInfo); +#endif +} + +static void WriteCrashEventFile(time_t crashTime, const char* crashTimeString, + const phc::AddrInfo* addrInfo, +#ifdef XP_LINUX + const MinidumpDescriptor& descriptor +#else + const XP_CHAR* minidump_id +#endif +) { + // Minidump IDs are UUIDs (36) + NULL. + static char id_ascii[37] = {}; +#ifdef XP_LINUX + const char* index = strrchr(descriptor.path(), '/'); + MOZ_ASSERT(index); + MOZ_ASSERT(strlen(index) == 1 + 36 + 4); // "/" + UUID + ".dmp" + for (uint32_t i = 0; i < 36; i++) { + id_ascii[i] = *(index + 1 + i); + } +#else + MOZ_ASSERT(XP_STRLEN(minidump_id) == 36); + for (uint32_t i = 0; i < 36; i++) { + id_ascii[i] = *((char*)(minidump_id + i)); + } +#endif + + PlatformWriter eventFile; + + if (!eventsDirectory.empty()) { + static XP_CHAR crashEventPath[XP_PATH_MAX]; + size_t size = XP_PATH_MAX; + XP_CHAR* p; + p = Concat(crashEventPath, eventsDirectory.c_str(), &size); + p = Concat(p, XP_PATH_SEPARATOR, &size); +#ifdef XP_LINUX + Concat(p, id_ascii, &size); +#else + Concat(p, minidump_id, &size); +#endif + + eventFile.Open(crashEventPath); + eventFile.WriteLiteral(kCrashMainID); + eventFile.WriteString(crashTimeString); + eventFile.WriteLiteral("\n"); + eventFile.WriteString(id_ascii); + eventFile.WriteLiteral("\n"); + WriteAnnotationsForMainProcessCrash(eventFile, addrInfo, crashTime); + } +} + +// Callback invoked from breakpad's exception handler, this writes out the +// last annotations after a crash occurs and launches the crash reporter client. +// +// This function is not declared static even though it's not used outside of +// this file because of an issue in Fennec which prevents breakpad's exception +// handler from invoking it. See bug 1424304. +bool MinidumpCallback( +#ifdef XP_LINUX + const MinidumpDescriptor& descriptor, +#else + const XP_CHAR* dump_path, const XP_CHAR* minidump_id, +#endif + void* context, +#ifdef XP_WIN + EXCEPTION_POINTERS* exinfo, MDRawAssertionInfo* assertion, +#endif + const phc::AddrInfo* addrInfo, bool succeeded) { + bool returnValue = showOSCrashReporter ? false : succeeded; + + static XP_CHAR minidumpPath[XP_PATH_MAX]; + size_t size = XP_PATH_MAX; + XP_CHAR* p; +#ifndef XP_LINUX + p = Concat(minidumpPath, dump_path, &size); + p = Concat(p, XP_PATH_SEPARATOR, &size); + p = Concat(p, minidump_id, &size); + Concat(p, dumpFileExtension, &size); +#else + Concat(minidumpPath, descriptor.path(), &size); +#endif + + static XP_CHAR memoryReportLocalPath[XP_PATH_MAX]; + size = XP_PATH_MAX; +#ifndef XP_LINUX + p = Concat(memoryReportLocalPath, dump_path, &size); + p = Concat(p, XP_PATH_SEPARATOR, &size); + p = Concat(p, minidump_id, &size); +#else + p = Concat(memoryReportLocalPath, descriptor.path(), &size); + // Skip back past the .dmp extension + p -= 4; +#endif + Concat(p, memoryReportExtension, &size); + + if (!memoryReportPath.empty()) { +#ifdef XP_WIN + CopyFile(memoryReportPath.c_str(), memoryReportLocalPath, false); +#else + copy_file(memoryReportPath.c_str(), memoryReportLocalPath); +#endif + } + + time_t crashTime = GetCurrentTimeForCrashTime(); + char crashTimeString[32]; + XP_TTOA(crashTime, crashTimeString); + + // write crash time to file + if (lastCrashTimeFilename[0] != 0) { + PlatformWriter lastCrashFile(lastCrashTimeFilename); + lastCrashFile.WriteString(crashTimeString); + } + + WriteCrashEventFile(crashTime, crashTimeString, addrInfo, +#ifdef XP_LINUX + descriptor +#else + minidump_id +#endif + ); + + { + PlatformWriter apiData; +#ifdef XP_LINUX + OpenAPIData(apiData, descriptor.path()); +#else + OpenAPIData(apiData, dump_path, minidump_id); +#endif + WriteAnnotationsForMainProcessCrash(apiData, addrInfo, crashTime); + } + + if (!doReport) { +#ifdef XP_WIN + TerminateProcess(GetCurrentProcess(), 1); +#endif // XP_WIN + return returnValue; + } + +#if defined(MOZ_WIDGET_ANDROID) // Android + returnValue = + LaunchCrashHandlerService(crashReporterPath.c_str(), minidumpPath); +#else // Windows, Mac, Linux, etc... + returnValue = LaunchProgram(crashReporterPath.c_str(), minidumpPath); +# ifdef XP_WIN + TerminateProcess(GetCurrentProcess(), 1); +# endif +#endif + + return returnValue; +} + +#if defined(XP_MACOSX) || defined(__ANDROID__) || defined(XP_LINUX) +static size_t EnsureTrailingSlash(XP_CHAR* aBuf, size_t aBufLen) { + size_t len = XP_STRLEN(aBuf); + if ((len + 1) < aBufLen && len > 0 && + aBuf[len - 1] != XP_PATH_SEPARATOR_CHAR) { + aBuf[len] = XP_PATH_SEPARATOR_CHAR; + ++len; + aBuf[len] = 0; + } + return len; +} +#endif + +#if defined(XP_WIN) + +static size_t BuildTempPath(wchar_t* aBuf, size_t aBufLen) { + // first figure out buffer size + DWORD pathLen = GetTempPath(0, nullptr); + if (pathLen == 0 || pathLen >= aBufLen) { + return 0; + } + + return GetTempPath(pathLen, aBuf); +} + +static size_t BuildTempPath(char16_t* aBuf, size_t aBufLen) { + return BuildTempPath(reinterpret_cast<wchar_t*>(aBuf), aBufLen); +} + +#elif defined(XP_MACOSX) + +static size_t BuildTempPath(char* aBuf, size_t aBufLen) { + if (aBufLen < PATH_MAX) { + return 0; + } + + FSRef fsRef; + OSErr err = + FSFindFolder(kUserDomain, kTemporaryFolderType, kCreateFolder, &fsRef); + if (err != noErr) { + return 0; + } + + OSStatus status = FSRefMakePath(&fsRef, (UInt8*)aBuf, PATH_MAX); + if (status != noErr) { + return 0; + } + + return EnsureTrailingSlash(aBuf, aBufLen); +} + +#elif defined(__ANDROID__) + +static size_t BuildTempPath(char* aBuf, size_t aBufLen) { + // GeckoAppShell sets this in the environment + const char* tempenv = PR_GetEnv("TMPDIR"); + if (!tempenv) { + return false; + } + size_t size = aBufLen; + Concat(aBuf, tempenv, &size); + return EnsureTrailingSlash(aBuf, aBufLen); +} + +#elif defined(XP_UNIX) + +static size_t BuildTempPath(char* aBuf, size_t aBufLen) { + const char* tempenv = PR_GetEnv("TMPDIR"); + const char* tmpPath = "/tmp/"; + if (!tempenv) { + tempenv = tmpPath; + } + size_t size = aBufLen; + Concat(aBuf, tempenv, &size); + return EnsureTrailingSlash(aBuf, aBufLen); +} + +#else +# error "Implement this for your platform" +#endif + +template <typename CharT, size_t N> +static size_t BuildTempPath(CharT (&aBuf)[N]) { + static_assert(N >= XP_PATH_MAX, "char array length is too small"); + return BuildTempPath(&aBuf[0], N); +} + +template <typename PathStringT> +static bool BuildTempPath(PathStringT& aResult) { + aResult.SetLength(XP_PATH_MAX); + size_t actualLen = BuildTempPath(aResult.BeginWriting(), XP_PATH_MAX); + if (!actualLen) { + return false; + } + aResult.SetLength(actualLen); + return true; +} + +FileHandle GetAnnotationTimeCrashFd() { return gChildCrashAnnotationReportFd; } + +static void PrepareChildExceptionTimeAnnotations( + const phc::AddrInfo* addrInfo) { + MOZ_ASSERT(!XRE_IsParentProcess()); + + PlatformWriter apiData; + apiData.OpenHandle(GetAnnotationTimeCrashFd()); + BinaryAnnotationWriter writer(apiData); + + WriteMozCrashReason(writer); + + WriteMainThreadRunnableName(writer); + + WriteOOMAllocationSize(writer); + +#ifdef MOZ_PHC + WritePHCAddrInfo(writer, addrInfo); +#endif + + WriteAnnotations(writer, crashReporterAPIData_Table); +} + +#ifdef XP_WIN + +static void ReserveBreakpadVM() { + if (!gBreakpadReservedVM) { + gBreakpadReservedVM = + VirtualAlloc(nullptr, kReserveSize, MEM_RESERVE, PAGE_NOACCESS); + } +} + +static void FreeBreakpadVM() { + if (gBreakpadReservedVM) { + VirtualFree(gBreakpadReservedVM, 0, MEM_RELEASE); + } +} + +static bool IsCrashingException(EXCEPTION_POINTERS* exinfo) { + if (!exinfo) { + return true; + } + + PEXCEPTION_RECORD e = (PEXCEPTION_RECORD)exinfo->ExceptionRecord; + switch (e->ExceptionCode) { + case STATUS_FLOAT_DENORMAL_OPERAND: + case STATUS_FLOAT_DIVIDE_BY_ZERO: + case STATUS_FLOAT_INEXACT_RESULT: + case STATUS_FLOAT_INVALID_OPERATION: + case STATUS_FLOAT_OVERFLOW: + case STATUS_FLOAT_STACK_CHECK: + case STATUS_FLOAT_UNDERFLOW: + case STATUS_FLOAT_MULTIPLE_FAULTS: + case STATUS_FLOAT_MULTIPLE_TRAPS: + return false; // Don't write minidump, continue exception search + default: + return true; + } +} + +#endif // XP_WIN + +// Do various actions to prepare the child process for minidump generation. +// This includes disabling the I/O interposer and DLL blocklist which both +// would get in the way. We also free the address space we had reserved in +// 32-bit builds to free room for the minidump generation to do its work. +static void PrepareForMinidump() { + mozilla::IOInterposer::Disable(); +#if defined(XP_WIN) +# if defined(DEBUG) && defined(HAS_DLL_BLOCKLIST) + DllBlocklist_Shutdown(); +# endif + FreeBreakpadVM(); +#endif // XP_WIN +} + +#ifdef XP_WIN + +/** + * Filters out floating point exceptions which are handled by nsSigHandlers.cpp + * and should not be handled as crashes. + */ +static ExceptionHandler::FilterResult Filter(void* context, + EXCEPTION_POINTERS* exinfo, + MDRawAssertionInfo* assertion) { + if (!IsCrashingException(exinfo)) { + return ExceptionHandler::FilterResult::ContinueSearch; + } + + PrepareForMinidump(); + return ExceptionHandler::FilterResult::HandleException; +} + +static ExceptionHandler::FilterResult ChildFilter( + void* context, EXCEPTION_POINTERS* exinfo, MDRawAssertionInfo* assertion) { + if (!IsCrashingException(exinfo)) { + return ExceptionHandler::FilterResult::ContinueSearch; + } + + if (gEncounteredChildException.exchange(true)) { + return ExceptionHandler::FilterResult::AbortWithoutMinidump; + } + + PrepareForMinidump(); + return ExceptionHandler::FilterResult::HandleException; +} + +static MINIDUMP_TYPE GetMinidumpType() { + MINIDUMP_TYPE minidump_type = static_cast<MINIDUMP_TYPE>( + MiniDumpWithFullMemoryInfo | MiniDumpWithUnloadedModules); + +# ifdef NIGHTLY_BUILD + // This is Nightly only because this doubles the size of minidumps based + // on the experimental data. + minidump_type = + static_cast<MINIDUMP_TYPE>(minidump_type | MiniDumpWithProcessThreadData); + + // dbghelp.dll on Win7 can't handle overlapping memory regions so we only + // enable this feature on Win8 or later. + if (IsWin8OrLater()) { + minidump_type = static_cast<MINIDUMP_TYPE>( + minidump_type | + // This allows us to examine heap objects referenced from stack objects + // at the cost of further doubling the size of minidumps. + MiniDumpWithIndirectlyReferencedMemory); + } +# endif + + const char* e = PR_GetEnv("MOZ_CRASHREPORTER_FULLDUMP"); + if (e && *e) { + minidump_type = MiniDumpWithFullMemory; + } + + return minidump_type; +} + +#else + +static bool Filter(void* context) { + PrepareForMinidump(); + return true; +} + +static bool ChildFilter(void* context) { + if (gEncounteredChildException.exchange(true)) { + return false; + } + + PrepareForMinidump(); + return true; +} + +#endif // !defined(XP_WIN) + +static bool ChildMinidumpCallback( +#if defined(XP_WIN) + const wchar_t* dump_path, const wchar_t* minidump_id, +#elif defined(XP_LINUX) + const MinidumpDescriptor& descriptor, +#else // defined(XP_MACOSX) + const char* dump_dir, const char* minidump_id, +#endif + void* context, +#if defined(XP_WIN) + EXCEPTION_POINTERS* exinfo, MDRawAssertionInfo* assertion, +#endif // defined(XP_WIN) + const mozilla::phc::AddrInfo* addr_info, bool succeeded) { + + PrepareChildExceptionTimeAnnotations(addr_info); + return succeeded; +} + +static bool ShouldReport() { + // this environment variable prevents us from launching + // the crash reporter client + const char* envvar = PR_GetEnv("MOZ_CRASHREPORTER_NO_REPORT"); + if (envvar && *envvar) { + return false; + } + + envvar = PR_GetEnv("MOZ_CRASHREPORTER_FULLDUMP"); + if (envvar && *envvar) { + return false; + } + + return true; +} + +static void TerminateHandler() { MOZ_CRASH("Unhandled exception"); } + +#if !defined(MOZ_WIDGET_ANDROID) + +// Locate the specified executable and store its path as a native string in +// the |aPath| so we can later invoke it from within the exception handler. +static nsresult LocateExecutable(nsIFile* aXREDirectory, const nsAString& aName, + PathString& aPath) { + nsCOMPtr<nsIFile> exePath; + nsresult rv = aXREDirectory->Clone(getter_AddRefs(exePath)); + NS_ENSURE_SUCCESS(rv, rv); + +# ifdef XP_MACOSX + exePath->SetNativeLeafName("MacOS"_ns); + exePath->Append(u"crashreporter.app"_ns); + exePath->Append(u"Contents"_ns); + exePath->Append(u"MacOS"_ns); +# endif + + exePath->Append(aName); + aPath = exePath->NativePath(); + return NS_OK; +} + +#endif // !defined(MOZ_WIDGET_ANDROID) + +#if defined(XP_WIN) + +DWORD WINAPI FlushContentProcessAnnotationsThreadFunc(LPVOID aContext) { + PrepareChildExceptionTimeAnnotations(nullptr); + return 0; +} + +#else + +static const int kAnnotationSignal = SIGUSR2; + +static void AnnotationSignalHandler(int aSignal, siginfo_t* aInfo, + void* aContext) { + PrepareChildExceptionTimeAnnotations(nullptr); +} + +#endif // defined(XP_WIN) + +static void InitChildAnnotationsFlusher() { +#if !defined(XP_WIN) + struct sigaction oldSigAction = {}; + struct sigaction sigAction = {}; + sigAction.sa_sigaction = AnnotationSignalHandler; + sigAction.sa_flags = SA_RESTART | SA_SIGINFO; + sigemptyset(&sigAction.sa_mask); + mozilla::DebugOnly<int> rv = + sigaction(kAnnotationSignal, &sigAction, &oldSigAction); + MOZ_ASSERT(rv == 0, "Failed to install the crash reporter's SIGUSR2 handler"); + MOZ_ASSERT(oldSigAction.sa_sigaction == nullptr, + "A SIGUSR2 handler was already present"); +#endif // !defined(XP_WIN) +} + +static bool FlushContentProcessAnnotations(ProcessHandle aTargetPid) { +#if defined(XP_WIN) + nsAutoHandle hThread(CreateRemoteThread( + aTargetPid, nullptr, 0, FlushContentProcessAnnotationsThreadFunc, nullptr, + 0, nullptr)); + return !!hThread; +#else // POSIX platforms + return kill(aTargetPid, kAnnotationSignal) == 0; +#endif +} + +static void InitializeAnnotationFacilities() { + crashReporterAPILock = new Mutex("crashReporterAPILock"); + notesFieldLock = new Mutex("notesFieldLock"); + notesField = new nsCString(); + if (!XRE_IsParentProcess()) { + InitChildAnnotationsFlusher(); + } +} + +static void TeardownAnnotationFacilities() { + std::fill(crashReporterAPIData_Table.begin(), + crashReporterAPIData_Table.end(), ""_ns); + + delete crashReporterAPILock; + crashReporterAPILock = nullptr; + + delete notesFieldLock; + notesFieldLock = nullptr; + + delete notesField; + notesField = nullptr; +} + +nsresult SetExceptionHandler(nsIFile* aXREDirectory, bool force /*=false*/) { + if (gExceptionHandler) return NS_ERROR_ALREADY_INITIALIZED; + +#if defined(DEBUG) + // In debug builds, disable the crash reporter by default, and allow to + // enable it with the MOZ_CRASHREPORTER environment variable. + const char* envvar = PR_GetEnv("MOZ_CRASHREPORTER"); + if ((!envvar || !*envvar) && !force) return NS_OK; +#else + // In other builds, enable the crash reporter by default, and allow + // disabling it with the MOZ_CRASHREPORTER_DISABLE environment variable. + const char* envvar = PR_GetEnv("MOZ_CRASHREPORTER_DISABLE"); + if (envvar && *envvar && !force) return NS_OK; +#endif + + // this environment variable prevents us from launching + // the crash reporter client + doReport = ShouldReport(); + + RegisterRuntimeExceptionModule(); + InitializeAnnotationFacilities(); + +#if !defined(MOZ_WIDGET_ANDROID) + // Locate the crash reporter executable + PathString crashReporterPath_temp; + nsresult rv = LocateExecutable(aXREDirectory, CRASH_REPORTER_FILENAME, + crashReporterPath_temp); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + + crashReporterPath = crashReporterPath_temp.get(); +#else + // On Android, we launch a service defined via MOZ_ANDROID_CRASH_HANDLER + const char* androidCrashHandler = PR_GetEnv("MOZ_ANDROID_CRASH_HANDLER"); + if (androidCrashHandler) { + crashReporterPath = xpstring(androidCrashHandler); + } else { + NS_WARNING("No Android crash handler set"); + } + + const char* deviceAndroidVersion = + PR_GetEnv("MOZ_ANDROID_DEVICE_SDK_VERSION"); + if (deviceAndroidVersion != nullptr) { + const int deviceSdkVersion = atol(deviceAndroidVersion); + if (deviceSdkVersion >= 26) { + androidStartServiceCommand = (char*)"start-foreground-service"; + } else { + androidStartServiceCommand = (char*)"startservice"; + } + } +#endif // !defined(MOZ_WIDGET_ANDROID) + + // get temp path to use for minidump path + PathString tempPath; + if (!BuildTempPath(tempPath)) { + return NS_ERROR_FAILURE; + } + +#ifdef XP_WIN + ReserveBreakpadVM(); + + // Pre-load psapi.dll to prevent it from being loaded during exception + // handling. + ::LoadLibraryW(L"psapi.dll"); +#endif // XP_WIN + +#ifdef MOZ_WIDGET_ANDROID + androidUserSerial = getenv("MOZ_ANDROID_USER_SERIAL_NUMBER"); +#endif + + // Initialize the flag and mutex used to avoid dump processing + // once browser termination has begun. + NS_ASSERTION(!dumpSafetyLock, "Shouldn't have a lock yet"); + // Do not deallocate this lock while it is still possible for + // isSafeToDump to be tested on another thread. + dumpSafetyLock = new Mutex("dumpSafetyLock"); + MutexAutoLock lock(*dumpSafetyLock); + isSafeToDump = true; + + // now set the exception handler +#ifdef XP_LINUX + MinidumpDescriptor descriptor(tempPath.get()); +#endif + +#ifdef XP_WIN + previousUnhandledExceptionFilter = GetUnhandledExceptionFilter(); +#endif + + gExceptionHandler = new google_breakpad::ExceptionHandler( +#ifdef XP_LINUX + descriptor, +#elif defined(XP_WIN) + std::wstring(tempPath.get()), +#else + tempPath.get(), +#endif + + Filter, MinidumpCallback, nullptr, +#ifdef XP_WIN + google_breakpad::ExceptionHandler::HANDLER_ALL, GetMinidumpType(), + (const wchar_t*)nullptr, nullptr); +#else + true +# ifdef XP_MACOSX + , + nullptr +# endif +# ifdef XP_LINUX + , + -1 +# endif + ); +#endif // XP_WIN + + if (!gExceptionHandler) return NS_ERROR_OUT_OF_MEMORY; + +#ifdef XP_WIN + gExceptionHandler->set_handle_debug_exceptions(true); + + // Initially set sIncludeContextHeap to true for debugging startup crashes + // even if the controlling pref value is false. + SetIncludeContextHeap(true); +# if defined(HAVE_64BIT_BUILD) + // Tell JS about the new filter before we disable SetUnhandledExceptionFilter + SetJitExceptionHandler(); +# endif + + RecordMainThreadId(); + + // protect the crash reporter from being unloaded + gBlockUnhandledExceptionFilter = true; + gKernel32Intercept.Init("kernel32.dll"); + DebugOnly<bool> ok = stub_SetUnhandledExceptionFilter.Set( + gKernel32Intercept, "SetUnhandledExceptionFilter", + &patched_SetUnhandledExceptionFilter); + +# ifdef DEBUG + if (!ok) + printf_stderr( + "SetUnhandledExceptionFilter hook failed; crash reporter is " + "vulnerable.\n"); +# endif +#endif + + // store application start time + char timeString[32]; + time_t startupTime = time(nullptr); + XP_TTOA(startupTime, timeString); + AnnotateCrashReport(Annotation::StartupTime, nsDependentCString(timeString)); + +#if defined(XP_MACOSX) + // On OS X, many testers like to see the OS crash reporting dialog + // since it offers immediate stack traces. We allow them to set + // a default to pass exceptions to the OS handler. + Boolean keyExistsAndHasValidFormat = false; + Boolean prefValue = ::CFPreferencesGetAppBooleanValue( + CFSTR("OSCrashReporter"), kCFPreferencesCurrentApplication, + &keyExistsAndHasValidFormat); + if (keyExistsAndHasValidFormat) showOSCrashReporter = prefValue; +#endif + + oldTerminateHandler = std::set_terminate(&TerminateHandler); + + return NS_OK; +} + +bool GetEnabled() { return gExceptionHandler != nullptr; } + +bool GetMinidumpPath(nsAString& aPath) { + if (!gExceptionHandler) return false; + +#ifndef XP_LINUX + aPath = CONVERT_XP_CHAR_TO_UTF16(gExceptionHandler->dump_path().c_str()); +#else + aPath = CONVERT_XP_CHAR_TO_UTF16( + gExceptionHandler->minidump_descriptor().directory().c_str()); +#endif + return true; +} + +nsresult SetMinidumpPath(const nsAString& aPath) { + if (!gExceptionHandler) return NS_ERROR_NOT_INITIALIZED; + +#ifdef XP_WIN + gExceptionHandler->set_dump_path( + std::wstring(char16ptr_t(aPath.BeginReading()))); +#elif defined(XP_LINUX) + gExceptionHandler->set_minidump_descriptor( + MinidumpDescriptor(NS_ConvertUTF16toUTF8(aPath).BeginReading())); +#else + gExceptionHandler->set_dump_path(NS_ConvertUTF16toUTF8(aPath).BeginReading()); +#endif + return NS_OK; +} + +static nsresult WriteDataToFile(nsIFile* aFile, const nsACString& data) { + PRFileDesc* fd; + nsresult rv = aFile->OpenNSPRFileDesc(PR_WRONLY | PR_CREATE_FILE, 00600, &fd); + NS_ENSURE_SUCCESS(rv, rv); + + rv = NS_OK; + if (PR_Write(fd, data.Data(), data.Length()) == -1) { + rv = NS_ERROR_FAILURE; + } + PR_Close(fd); + return rv; +} + +static nsresult GetFileContents(nsIFile* aFile, nsACString& data) { + PRFileDesc* fd; + nsresult rv = aFile->OpenNSPRFileDesc(PR_RDONLY, 0, &fd); + NS_ENSURE_SUCCESS(rv, rv); + + rv = NS_OK; + int32_t filesize = PR_Available(fd); + if (filesize <= 0) { + rv = NS_ERROR_FILE_NOT_FOUND; + } else { + data.SetLength(filesize); + if (PR_Read(fd, data.BeginWriting(), filesize) == -1) { + rv = NS_ERROR_FAILURE; + } + } + PR_Close(fd); + return rv; +} + +// Function typedef for initializing a piece of data that we +// don't already have. +typedef nsresult (*InitDataFunc)(nsACString&); + +// Attempt to read aFile's contents into aContents, if aFile +// does not exist, create it and initialize its contents +// by calling aInitFunc for the data. +static nsresult GetOrInit(nsIFile* aDir, const nsACString& filename, + nsACString& aContents, InitDataFunc aInitFunc) { + bool exists; + + nsCOMPtr<nsIFile> dataFile; + nsresult rv = aDir->Clone(getter_AddRefs(dataFile)); + NS_ENSURE_SUCCESS(rv, rv); + + rv = dataFile->AppendNative(filename); + NS_ENSURE_SUCCESS(rv, rv); + + rv = dataFile->Exists(&exists); + NS_ENSURE_SUCCESS(rv, rv); + + if (!exists) { + if (aInitFunc) { + // get the initial value and write it to the file + rv = aInitFunc(aContents); + NS_ENSURE_SUCCESS(rv, rv); + rv = WriteDataToFile(dataFile, aContents); + } else { + // didn't pass in an init func + rv = NS_ERROR_FAILURE; + } + } else { + // just get the file's contents + rv = GetFileContents(dataFile, aContents); + } + + return rv; +} + +// Init the "install time" data. We're taking an easy way out here +// and just setting this to "the time when this version was first run". +static nsresult InitInstallTime(nsACString& aInstallTime) { + time_t t = time(nullptr); + aInstallTime = nsPrintfCString("%" PRIu64, static_cast<uint64_t>(t)); + + return NS_OK; +} + +// Ensure a directory exists and create it if missing. +static nsresult EnsureDirectoryExists(nsIFile* dir) { + nsresult rv = dir->Create(nsIFile::DIRECTORY_TYPE, 0700); + + if (NS_WARN_IF(NS_FAILED(rv) && rv != NS_ERROR_FILE_ALREADY_EXISTS)) { + return rv; + } + + return NS_OK; +} + +// Creates a directory that will be accessible by the crash reporter. The +// directory will live under Firefox default data directory and will use the +// specified name. The directory path will be passed to the crashreporter via +// the specified environment variable. +static nsresult SetupCrashReporterDirectory(nsIFile* aAppDataDirectory, + const char* aDirName, + const XP_CHAR* aEnvVarName, + nsIFile** aDirectory = nullptr) { + nsCOMPtr<nsIFile> directory; + nsresult rv = aAppDataDirectory->Clone(getter_AddRefs(directory)); + NS_ENSURE_SUCCESS(rv, rv); + + rv = directory->AppendNative(nsDependentCString(aDirName)); + NS_ENSURE_SUCCESS(rv, rv); + + EnsureDirectoryExists(directory); + xpstring* directoryPath = CreatePathFromFile(directory); + + if (!directoryPath) { + return NS_ERROR_FAILURE; + } + +#if defined(XP_WIN) + SetEnvironmentVariableW(aEnvVarName, directoryPath->c_str()); +#else + setenv(aEnvVarName, directoryPath->c_str(), /* overwrite */ 1); +#endif + + delete directoryPath; + + if (aDirectory) { + directory.forget(aDirectory); + } + + return NS_OK; +} + +// Annotate the crash report with a Unique User ID and time +// since install. Also do some prep work for recording +// time since last crash, which must be calculated at +// crash time. +// If any piece of data doesn't exist, initialize it first. +nsresult SetupExtraData(nsIFile* aAppDataDirectory, + const nsACString& aBuildID) { + nsCOMPtr<nsIFile> dataDirectory; + nsresult rv = + SetupCrashReporterDirectory(aAppDataDirectory, "Crash Reports", + XP_TEXT("MOZ_CRASHREPORTER_DATA_DIRECTORY"), + getter_AddRefs(dataDirectory)); + + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + + rv = SetupCrashReporterDirectory(aAppDataDirectory, "Pending Pings", + XP_TEXT("MOZ_CRASHREPORTER_PING_DIRECTORY")); + + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + + nsAutoCString data; + if (NS_SUCCEEDED(GetOrInit(dataDirectory, "InstallTime"_ns + aBuildID, data, + InitInstallTime))) + AnnotateCrashReport(Annotation::InstallTime, data); + + // this is a little different, since we can't init it with anything, + // since it's stored at crash time, and we can't annotate the + // crash report with the stored value, since we really want + // (now - LastCrash), so we just get a value if it exists, + // and store it in a time_t value. + if (NS_SUCCEEDED(GetOrInit(dataDirectory, "LastCrash"_ns, data, nullptr))) { + lastCrashTime = (time_t)atol(data.get()); + } + + // not really the best place to init this, but I have the path I need here + nsCOMPtr<nsIFile> lastCrashFile; + rv = dataDirectory->Clone(getter_AddRefs(lastCrashFile)); + NS_ENSURE_SUCCESS(rv, rv); + + rv = lastCrashFile->AppendNative("LastCrash"_ns); + NS_ENSURE_SUCCESS(rv, rv); + memset(lastCrashTimeFilename, 0, sizeof(lastCrashTimeFilename)); + + PathString filename; +#if defined(XP_WIN) + rv = lastCrashFile->GetPath(filename); +#else + rv = lastCrashFile->GetNativePath(filename); +#endif + NS_ENSURE_SUCCESS(rv, rv); + + if (filename.Length() < XP_PATH_MAX) { +#if defined(XP_WIN) + wcsncpy(lastCrashTimeFilename, filename.get(), filename.Length()); +#else + strncpy(lastCrashTimeFilename, filename.get(), filename.Length()); +#endif + } + + return NS_OK; +} + +static void OOPDeinit(); + +nsresult UnsetExceptionHandler() { + if (isSafeToDump) { + MutexAutoLock lock(*dumpSafetyLock); + isSafeToDump = false; + } + +#ifdef XP_WIN + // allow SetUnhandledExceptionFilter + gBlockUnhandledExceptionFilter = false; +#endif + + delete gExceptionHandler; + + TeardownAnnotationFacilities(); + + if (!gExceptionHandler) return NS_ERROR_NOT_INITIALIZED; + + gExceptionHandler = nullptr; + + OOPDeinit(); + + delete dumpSafetyLock; + dumpSafetyLock = nullptr; + + std::set_terminate(oldTerminateHandler); + + return NS_OK; +} + +nsresult AnnotateCrashReport(Annotation key, bool data) { + return AnnotateCrashReport(key, data ? "1"_ns : "0"_ns); +} + +nsresult AnnotateCrashReport(Annotation key, int data) { + nsAutoCString dataString; + dataString.AppendInt(data); + + return AnnotateCrashReport(key, dataString); +} + +nsresult AnnotateCrashReport(Annotation key, unsigned int data) { + nsAutoCString dataString; + dataString.AppendInt(data); + + return AnnotateCrashReport(key, dataString); +} + +nsresult AnnotateCrashReport(Annotation key, const nsACString& data) { + if (!GetEnabled()) return NS_ERROR_NOT_INITIALIZED; + + MutexAutoLock lock(*crashReporterAPILock); + crashReporterAPIData_Table[key] = data; + + return NS_OK; +} + +nsresult AppendToCrashReportAnnotation(Annotation key, const nsACString& data) { + if (!GetEnabled()) return NS_ERROR_NOT_INITIALIZED; + + MutexAutoLock lock(*crashReporterAPILock); + nsAutoCString newString(crashReporterAPIData_Table[key]); + newString.Append(" - "_ns); + newString.Append(data); + crashReporterAPIData_Table[key] = newString; + + return NS_OK; +} + +nsresult RemoveCrashReportAnnotation(Annotation key) { + return AnnotateCrashReport(key, ""_ns); +} + +AutoAnnotateCrashReport::AutoAnnotateCrashReport(Annotation key, bool data) + : AutoAnnotateCrashReport(key, data ? "1"_ns : "0"_ns) {} + +AutoAnnotateCrashReport::AutoAnnotateCrashReport(Annotation key, int data) + : AutoAnnotateCrashReport(key, nsPrintfCString("%d", data)) {} + +AutoAnnotateCrashReport::AutoAnnotateCrashReport(Annotation key, unsigned data) + : AutoAnnotateCrashReport(key, nsPrintfCString("%u", data)) {} + +AutoAnnotateCrashReport::AutoAnnotateCrashReport(Annotation key, + const nsACString& data) + : mKey(key) { + if (GetEnabled()) { + MutexAutoLock lock(*crashReporterAPILock); + auto& entry = crashReporterAPIData_Table[mKey]; + mPrevious = std::move(entry); + entry = data; + } +} + +AutoAnnotateCrashReport::~AutoAnnotateCrashReport() { + if (GetEnabled()) { + MutexAutoLock lock(*crashReporterAPILock); + crashReporterAPIData_Table[mKey] = std::move(mPrevious); + } +} + +void MergeCrashAnnotations(AnnotationTable& aDst, const AnnotationTable& aSrc) { + for (auto key : MakeEnumeratedRange(Annotation::Count)) { + const nsCString& value = aSrc[key]; + if (!value.IsEmpty()) { + aDst[key] = value; + } + } +} + +static void MergeContentCrashAnnotations(AnnotationTable& aDst) { + MutexAutoLock lock(*crashReporterAPILock); + MergeCrashAnnotations(aDst, crashReporterAPIData_Table); +} + +// Adds crash time, uptime and memory report annotations +static void AddCommonAnnotations(AnnotationTable& aAnnotations) { + const time_t crashTime = time(nullptr); + nsAutoCString crashTimeStr; + crashTimeStr.AppendInt(static_cast<uint64_t>(crashTime)); + aAnnotations[Annotation::CrashTime] = crashTimeStr; + + if (inactiveStateStart) { + nsAutoCString inactiveDuration; + inactiveDuration.AppendInt( + static_cast<uint64_t>(crashTime - inactiveStateStart)); + aAnnotations[Annotation::LastInteractionDuration] = inactiveDuration; + } + + double uptimeTS = (TimeStamp::NowLoRes() - TimeStamp::ProcessCreation()) + .ToSecondsSigDigits(); + nsAutoCString uptimeStr; + uptimeStr.AppendFloat(uptimeTS); + aAnnotations[Annotation::UptimeTS] = uptimeStr; +} + +nsresult SetGarbageCollecting(bool collecting) { + if (!GetEnabled()) return NS_ERROR_NOT_INITIALIZED; + + isGarbageCollecting = collecting; + + return NS_OK; +} + +void SetEventloopNestingLevel(uint32_t level) { eventloopNestingLevel = level; } + +void ClearInactiveStateStart() { inactiveStateStart = 0; } +void SetInactiveStateStart() { + if (!inactiveStateStart) { + inactiveStateStart = GetCurrentTimeForCrashTime(); + } +} + +void SetMinidumpAnalysisAllThreads() { + char* env = strdup("MOZ_CRASHREPORTER_DUMP_ALL_THREADS=1"); + PR_SetEnv(env); +} + +nsresult AppendAppNotesToCrashReport(const nsACString& data) { + if (!GetEnabled()) return NS_ERROR_NOT_INITIALIZED; + + MutexAutoLock lock(*notesFieldLock); + + notesField->Append(data); + return AnnotateCrashReport(Annotation::Notes, *notesField); +} + +// Returns true if found, false if not found. +static bool GetAnnotation(CrashReporter::Annotation key, nsACString& data) { + if (!gExceptionHandler) return false; + + MutexAutoLock lock(*crashReporterAPILock); + const nsCString& entry = crashReporterAPIData_Table[key]; + if (entry.IsEmpty()) { + return false; + } + + data = entry; + return true; +} + +nsresult RegisterAppMemory(void* ptr, size_t length) { + if (!GetEnabled()) return NS_ERROR_NOT_INITIALIZED; + +#if defined(XP_LINUX) || defined(XP_WIN) + gExceptionHandler->RegisterAppMemory(ptr, length); + return NS_OK; +#else + return NS_ERROR_NOT_IMPLEMENTED; +#endif +} + +nsresult UnregisterAppMemory(void* ptr) { + if (!GetEnabled()) return NS_ERROR_NOT_INITIALIZED; + +#if defined(XP_LINUX) || defined(XP_WIN) + gExceptionHandler->UnregisterAppMemory(ptr); + return NS_OK; +#else + return NS_ERROR_NOT_IMPLEMENTED; +#endif +} + +void SetIncludeContextHeap(bool aValue) { + sIncludeContextHeap = aValue; + +#ifdef XP_WIN + if (gExceptionHandler) { + gExceptionHandler->set_include_context_heap(sIncludeContextHeap); + } +#endif +} + +bool GetServerURL(nsACString& aServerURL) { + if (!gExceptionHandler) return false; + + return GetAnnotation(CrashReporter::Annotation::ServerURL, aServerURL); +} + +nsresult SetServerURL(const nsACString& aServerURL) { + // store server URL with the API data + // the client knows to handle this specially + return AnnotateCrashReport(Annotation::ServerURL, aServerURL); +} + +nsresult SetRestartArgs(int argc, char** argv) { + if (!gExceptionHandler) return NS_OK; + + int i; + nsAutoCString envVar; + char* env; + char* argv0 = getenv("MOZ_APP_LAUNCHER"); + for (i = 0; i < argc; i++) { + envVar = "MOZ_CRASHREPORTER_RESTART_ARG_"; + envVar.AppendInt(i); + envVar += "="; + if (argv0 && i == 0) { + // Is there a request to suppress default binary launcher? + envVar += argv0; + } else { + envVar += argv[i]; + } + + // PR_SetEnv() wants the string to be available for the lifetime + // of the app, so dup it here. This conversion is not lossy. + env = ToNewCString(envVar, mozilla::fallible); + if (!env) return NS_ERROR_OUT_OF_MEMORY; + + PR_SetEnv(env); + } + + // make sure the arg list is terminated + envVar = "MOZ_CRASHREPORTER_RESTART_ARG_"; + envVar.AppendInt(i); + envVar += "="; + + // PR_SetEnv() wants the string to be available for the lifetime + // of the app, so dup it here. This conversion is not lossy. + env = ToNewCString(envVar, mozilla::fallible); + if (!env) return NS_ERROR_OUT_OF_MEMORY; + + PR_SetEnv(env); + + // make sure we save the info in XUL_APP_FILE for the reporter + const char* appfile = PR_GetEnv("XUL_APP_FILE"); + if (appfile && *appfile) { + envVar = "MOZ_CRASHREPORTER_RESTART_XUL_APP_FILE="; + envVar += appfile; + + // PR_SetEnv() wants the string to be available for the lifetime + // of the app, so dup it here. This conversion is not lossy. + env = ToNewCString(envVar); + PR_SetEnv(env); + } + + return NS_OK; +} + +#ifdef XP_WIN +nsresult WriteMinidumpForException(EXCEPTION_POINTERS* aExceptionInfo) { + if (!gExceptionHandler) return NS_ERROR_NOT_INITIALIZED; + + return gExceptionHandler->WriteMinidumpForException(aExceptionInfo) + ? NS_OK + : NS_ERROR_FAILURE; +} +#endif + +#ifdef XP_LINUX +bool WriteMinidumpForSigInfo(int signo, siginfo_t* info, void* uc) { + if (!gExceptionHandler) { + // Crash reporting is disabled. + return false; + } + return gExceptionHandler->HandleSignal(signo, info, uc); +} +#endif + +#ifdef XP_MACOSX +nsresult AppendObjCExceptionInfoToAppNotes(void* inException) { + nsAutoCString excString; + GetObjCExceptionInfo(inException, excString); + AppendAppNotesToCrashReport(excString); + return NS_OK; +} +#endif + +/* + * Combined code to get/set the crash reporter submission pref on + * different platforms. + */ +static nsresult PrefSubmitReports(bool* aSubmitReports, bool writePref) { + nsresult rv; +#if defined(XP_WIN) + /* + * NOTE! This needs to stay in sync with the preference checking code + * in toolkit/crashreporter/client/crashreporter_win.cpp + */ + nsCOMPtr<nsIXULAppInfo> appinfo = + do_GetService("@mozilla.org/xre/app-info;1", &rv); + NS_ENSURE_SUCCESS(rv, rv); + + nsAutoCString appVendor, appName; + rv = appinfo->GetVendor(appVendor); + NS_ENSURE_SUCCESS(rv, rv); + rv = appinfo->GetName(appName); + NS_ENSURE_SUCCESS(rv, rv); + + nsCOMPtr<nsIWindowsRegKey> regKey( + do_CreateInstance("@mozilla.org/windows-registry-key;1", &rv)); + NS_ENSURE_SUCCESS(rv, rv); + + nsAutoCString regPath; + + regPath.AppendLiteral("Software\\"); + + // We need to ensure the registry keys are created so we can properly + // write values to it + + // Create appVendor key + if (!appVendor.IsEmpty()) { + regPath.Append(appVendor); + regKey->Create(nsIWindowsRegKey::ROOT_KEY_CURRENT_USER, + NS_ConvertUTF8toUTF16(regPath), + nsIWindowsRegKey::ACCESS_SET_VALUE); + regPath.Append('\\'); + } + + // Create appName key + regPath.Append(appName); + regKey->Create(nsIWindowsRegKey::ROOT_KEY_CURRENT_USER, + NS_ConvertUTF8toUTF16(regPath), + nsIWindowsRegKey::ACCESS_SET_VALUE); + regPath.Append('\\'); + + // Create Crash Reporter key + regPath.AppendLiteral("Crash Reporter"); + regKey->Create(nsIWindowsRegKey::ROOT_KEY_CURRENT_USER, + NS_ConvertUTF8toUTF16(regPath), + nsIWindowsRegKey::ACCESS_SET_VALUE); + + // If we're saving the pref value, just write it to ROOT_KEY_CURRENT_USER + // and we're done. + if (writePref) { + rv = regKey->Open(nsIWindowsRegKey::ROOT_KEY_CURRENT_USER, + NS_ConvertUTF8toUTF16(regPath), + nsIWindowsRegKey::ACCESS_SET_VALUE); + NS_ENSURE_SUCCESS(rv, rv); + + uint32_t value = *aSubmitReports ? 1 : 0; + rv = regKey->WriteIntValue(u"SubmitCrashReport"_ns, value); + regKey->Close(); + return rv; + } + + // We're reading the pref value, so we need to first look under + // ROOT_KEY_LOCAL_MACHINE to see if it's set there, and then fall back to + // ROOT_KEY_CURRENT_USER. If it's not set in either place, the pref defaults + // to "true". + uint32_t value; + rv = regKey->Open(nsIWindowsRegKey::ROOT_KEY_LOCAL_MACHINE, + NS_ConvertUTF8toUTF16(regPath), + nsIWindowsRegKey::ACCESS_QUERY_VALUE); + if (NS_SUCCEEDED(rv)) { + rv = regKey->ReadIntValue(u"SubmitCrashReport"_ns, &value); + regKey->Close(); + if (NS_SUCCEEDED(rv)) { + *aSubmitReports = !!value; + return NS_OK; + } + } + + rv = regKey->Open(nsIWindowsRegKey::ROOT_KEY_CURRENT_USER, + NS_ConvertUTF8toUTF16(regPath), + nsIWindowsRegKey::ACCESS_QUERY_VALUE); + if (NS_FAILED(rv)) { + *aSubmitReports = true; + return NS_OK; + } + + rv = regKey->ReadIntValue(u"SubmitCrashReport"_ns, &value); + // default to true on failure + if (NS_FAILED(rv)) { + value = 1; + rv = NS_OK; + } + regKey->Close(); + + *aSubmitReports = !!value; + return NS_OK; +#elif defined(XP_MACOSX) + rv = NS_OK; + if (writePref) { + CFPropertyListRef cfValue = + (CFPropertyListRef)(*aSubmitReports ? kCFBooleanTrue : kCFBooleanFalse); + ::CFPreferencesSetAppValue(CFSTR("submitReport"), cfValue, + reporterClientAppID); + if (!::CFPreferencesAppSynchronize(reporterClientAppID)) + rv = NS_ERROR_FAILURE; + } else { + *aSubmitReports = true; + Boolean keyExistsAndHasValidFormat = false; + Boolean prefValue = ::CFPreferencesGetAppBooleanValue( + CFSTR("submitReport"), reporterClientAppID, + &keyExistsAndHasValidFormat); + if (keyExistsAndHasValidFormat) *aSubmitReports = !!prefValue; + } + return rv; +#elif defined(XP_UNIX) + /* + * NOTE! This needs to stay in sync with the preference checking code + * in toolkit/crashreporter/client/crashreporter_linux.cpp + */ + nsCOMPtr<nsIFile> reporterINI; + rv = NS_GetSpecialDirectory("UAppData", getter_AddRefs(reporterINI)); + NS_ENSURE_SUCCESS(rv, rv); + reporterINI->AppendNative("Crash Reports"_ns); + reporterINI->AppendNative("crashreporter.ini"_ns); + + bool exists; + rv = reporterINI->Exists(&exists); + NS_ENSURE_SUCCESS(rv, rv); + if (!exists) { + if (!writePref) { + // If reading the pref, default to true if .ini doesn't exist. + *aSubmitReports = true; + return NS_OK; + } + // Create the file so the INI processor can write to it. + rv = reporterINI->Create(nsIFile::NORMAL_FILE_TYPE, 0600); + NS_ENSURE_SUCCESS(rv, rv); + } + + nsCOMPtr<nsIINIParserFactory> iniFactory = + do_GetService("@mozilla.org/xpcom/ini-parser-factory;1", &rv); + NS_ENSURE_SUCCESS(rv, rv); + + nsCOMPtr<nsIINIParser> iniParser; + rv = iniFactory->CreateINIParser(reporterINI, getter_AddRefs(iniParser)); + NS_ENSURE_SUCCESS(rv, rv); + + // If we're writing the pref, just set and we're done. + if (writePref) { + nsCOMPtr<nsIINIParserWriter> iniWriter = do_QueryInterface(iniParser); + NS_ENSURE_TRUE(iniWriter, NS_ERROR_FAILURE); + + rv = iniWriter->SetString("Crash Reporter"_ns, "SubmitReport"_ns, + *aSubmitReports ? "1"_ns : "0"_ns); + NS_ENSURE_SUCCESS(rv, rv); + rv = iniWriter->WriteFile(reporterINI); + return rv; + } + + nsAutoCString submitReportValue; + rv = iniParser->GetString("Crash Reporter"_ns, "SubmitReport"_ns, + submitReportValue); + + // Default to "true" if the pref can't be found. + if (NS_FAILED(rv)) + *aSubmitReports = true; + else if (submitReportValue.EqualsASCII("0")) + *aSubmitReports = false; + else + *aSubmitReports = true; + + return NS_OK; +#else + return NS_ERROR_NOT_IMPLEMENTED; +#endif +} + +nsresult GetSubmitReports(bool* aSubmitReports) { + return PrefSubmitReports(aSubmitReports, false); +} + +nsresult SetSubmitReports(bool aSubmitReports) { + nsresult rv; + + nsCOMPtr<nsIObserverService> obsServ = + mozilla::services::GetObserverService(); + if (!obsServ) { + return NS_ERROR_FAILURE; + } + + rv = PrefSubmitReports(&aSubmitReports, true); + if (NS_FAILED(rv)) { + return rv; + } + + obsServ->NotifyObservers(nullptr, "submit-reports-pref-changed", nullptr); + return NS_OK; +} + +static void SetCrashEventsDir(nsIFile* aDir) { + static const XP_CHAR eventsDirectoryEnv[] = + XP_TEXT("MOZ_CRASHREPORTER_EVENTS_DIRECTORY"); + + nsCOMPtr<nsIFile> eventsDir = aDir; + + const char* env = PR_GetEnv("CRASHES_EVENTS_DIR"); + if (env && *env) { + NS_NewNativeLocalFile(nsDependentCString(env), false, + getter_AddRefs(eventsDir)); + EnsureDirectoryExists(eventsDir); + } + + xpstring* path = CreatePathFromFile(eventsDir); + if (!path) { + return; // There's no clean failure from this + } + + eventsDirectory = xpstring(*path); +#ifdef XP_WIN + SetEnvironmentVariableW(eventsDirectoryEnv, path->c_str()); +#else + setenv(eventsDirectoryEnv, path->c_str(), /* overwrite */ 1); +#endif + + delete path; +} + +void SetProfileDirectory(nsIFile* aDir) { + nsCOMPtr<nsIFile> dir; + aDir->Clone(getter_AddRefs(dir)); + + dir->Append(u"crashes"_ns); + EnsureDirectoryExists(dir); + dir->Append(u"events"_ns); + EnsureDirectoryExists(dir); + SetCrashEventsDir(dir); +} + +void SetUserAppDataDirectory(nsIFile* aDir) { + nsCOMPtr<nsIFile> dir; + aDir->Clone(getter_AddRefs(dir)); + + dir->Append(u"Crash Reports"_ns); + EnsureDirectoryExists(dir); + dir->Append(u"events"_ns); + EnsureDirectoryExists(dir); + SetCrashEventsDir(dir); +} + +void UpdateCrashEventsDir() { + const char* env = PR_GetEnv("CRASHES_EVENTS_DIR"); + if (env && *env) { + SetCrashEventsDir(nullptr); + } + + nsCOMPtr<nsIFile> eventsDir; + nsresult rv = NS_GetSpecialDirectory("ProfD", getter_AddRefs(eventsDir)); + if (NS_SUCCEEDED(rv)) { + SetProfileDirectory(eventsDir); + return; + } + + rv = NS_GetSpecialDirectory("UAppData", getter_AddRefs(eventsDir)); + if (NS_SUCCEEDED(rv)) { + SetUserAppDataDirectory(eventsDir); + return; + } + + NS_WARNING( + "Couldn't get the user appdata directory. Crash events may not be " + "produced."); +} + +bool GetCrashEventsDir(nsAString& aPath) { + if (eventsDirectory.empty()) { + return false; + } + aPath = CONVERT_XP_CHAR_TO_UTF16(eventsDirectory.c_str()); + return true; +} + +void SetMemoryReportFile(nsIFile* aFile) { + if (!gExceptionHandler) { + return; + } + + PathString path; +#ifdef XP_WIN + aFile->GetPath(path); +#else + aFile->GetNativePath(path); +#endif + memoryReportPath = xpstring(path.get()); +} + +nsresult GetDefaultMemoryReportFile(nsIFile** aFile) { + nsCOMPtr<nsIFile> defaultMemoryReportFile; + if (!defaultMemoryReportPath) { + nsresult rv = NS_GetSpecialDirectory( + NS_APP_PROFILE_DIR_STARTUP, getter_AddRefs(defaultMemoryReportFile)); + if (NS_FAILED(rv)) { + return rv; + } + defaultMemoryReportFile->AppendNative("memory-report.json.gz"_ns); + defaultMemoryReportPath = CreatePathFromFile(defaultMemoryReportFile); + if (!defaultMemoryReportPath) { + return NS_ERROR_FAILURE; + } + } else { + CreateFileFromPath(*defaultMemoryReportPath, + getter_AddRefs(defaultMemoryReportFile)); + if (!defaultMemoryReportFile) { + return NS_ERROR_FAILURE; + } + } + defaultMemoryReportFile.forget(aFile); + return NS_OK; +} + +static void FindPendingDir() { + if (!pendingDirectory.empty()) { + return; + } + nsCOMPtr<nsIFile> pendingDir; + nsresult rv = NS_GetSpecialDirectory("UAppData", getter_AddRefs(pendingDir)); + if (NS_FAILED(rv)) { + NS_WARNING( + "Couldn't get the user appdata directory, crash dumps will go in an " + "unusual location"); + } else { + pendingDir->Append(u"Crash Reports"_ns); + pendingDir->Append(u"pending"_ns); + + PathString path; +#ifdef XP_WIN + pendingDir->GetPath(path); +#else + pendingDir->GetNativePath(path); +#endif + pendingDirectory = xpstring(path.get()); + } +} + +// The "pending" dir is Crash Reports/pending, from which minidumps +// can be submitted. Because this method may be called off the main thread, +// we store the pending directory as a path. +static bool GetPendingDir(nsIFile** dir) { + // MOZ_ASSERT(OOPInitialized()); + if (pendingDirectory.empty()) { + return false; + } + + nsCOMPtr<nsIFile> pending = do_CreateInstance(NS_LOCAL_FILE_CONTRACTID); + if (!pending) { + NS_WARNING("Can't set up pending directory during shutdown."); + return false; + } +#ifdef XP_WIN + pending->InitWithPath(nsDependentString(pendingDirectory.c_str())); +#else + pending->InitWithNativePath(nsDependentCString(pendingDirectory.c_str())); +#endif + pending.swap(*dir); + return true; +} + +// The "limbo" dir is where minidumps go to wait for something else to +// use them. If we're |ShouldReport()|, then the "something else" is +// a minidump submitter, and they're coming from the +// Crash Reports/pending/ dir. Otherwise, we don't know what the +// "somthing else" is, but the minidumps stay in [profile]/minidumps/ +// limbo. +static bool GetMinidumpLimboDir(nsIFile** dir) { + if (ShouldReport()) { + return GetPendingDir(dir); + } else { +#ifndef XP_LINUX + CreateFileFromPath(gExceptionHandler->dump_path(), dir); +#else + CreateFileFromPath(gExceptionHandler->minidump_descriptor().directory(), + dir); +#endif + return nullptr != *dir; + } +} + +void DeleteMinidumpFilesForID(const nsAString& aId, + const Maybe<nsString>& aAdditionalMinidump) { + nsCOMPtr<nsIFile> minidumpFile; + if (GetMinidumpForID(aId, getter_AddRefs(minidumpFile))) { + minidumpFile->Remove(false); + } + + nsCOMPtr<nsIFile> extraFile; + if (GetExtraFileForID(aId, getter_AddRefs(extraFile))) { + extraFile->Remove(false); + } + + if (aAdditionalMinidump && GetMinidumpForID(aId, getter_AddRefs(minidumpFile), + aAdditionalMinidump)) { + minidumpFile->Remove(false); + } +} + +bool GetMinidumpForID(const nsAString& id, nsIFile** minidump, + const Maybe<nsString>& aAdditionalMinidump) { + if (!GetMinidumpLimboDir(minidump)) { + return false; + } + + nsAutoString fileName(id); + + if (aAdditionalMinidump) { + fileName.Append('-'); + fileName.Append(*aAdditionalMinidump); + } + + fileName.Append(u".dmp"_ns); + (*minidump)->Append(fileName); + + bool exists; + if (NS_FAILED((*minidump)->Exists(&exists)) || !exists) { + return false; + } + + return true; +} + +bool GetIDFromMinidump(nsIFile* minidump, nsAString& id) { + if (minidump && NS_SUCCEEDED(minidump->GetLeafName(id))) { + id.ReplaceLiteral(id.Length() - 4, 4, u""); + return true; + } + return false; +} + +bool GetExtraFileForID(const nsAString& id, nsIFile** extraFile) { + if (!GetMinidumpLimboDir(extraFile)) { + return false; + } + + (*extraFile)->Append(id + u".extra"_ns); + + bool exists; + if (NS_FAILED((*extraFile)->Exists(&exists)) || !exists) { + return false; + } + + return true; +} + +bool GetExtraFileForMinidump(nsIFile* minidump, nsIFile** extraFile) { + nsAutoString leafName; + nsresult rv = minidump->GetLeafName(leafName); + if (NS_FAILED(rv)) return false; + + nsCOMPtr<nsIFile> extraF; + rv = minidump->Clone(getter_AddRefs(extraF)); + if (NS_FAILED(rv)) return false; + + leafName.Replace(leafName.Length() - 3, 3, u"extra"_ns); + rv = extraF->SetLeafName(leafName); + if (NS_FAILED(rv)) return false; + + *extraFile = nullptr; + extraF.swap(*extraFile); + return true; +} + +static void ReadAndValidateExceptionTimeAnnotations( + PRFileDesc* aFd, AnnotationTable& aAnnotations) { + PRInt32 res; + do { + uint32_t rawAnnotation; + res = PR_Read(aFd, &rawAnnotation, sizeof(rawAnnotation)); + if ((res != sizeof(rawAnnotation)) || + (rawAnnotation >= static_cast<uint32_t>(Annotation::Count))) { + return; + } + + uint64_t len; + res = PR_Read(aFd, &len, sizeof(len)); + if (res != sizeof(len) || (len == 0)) { + return; + } + + char c; + nsAutoCString value; + do { + res = PR_Read(aFd, &c, 1); + if (res != 1) { + return; + } + + len--; + value.Append(c); + } while (len > 0); + + // Looks good, save the (annotation, value) pair + aAnnotations[static_cast<Annotation>(rawAnnotation)] = value; + } while (res > 0); +} + +static bool WriteExtraFile(PlatformWriter& pw, + const AnnotationTable& aAnnotations) { + if (!pw.Valid()) { + return false; + } + + JSONAnnotationWriter writer(pw); + WriteAnnotations(writer, aAnnotations); + WriteSynthesizedAnnotations(writer); + + return true; +} + +bool WriteExtraFile(const nsAString& id, const AnnotationTable& annotations) { + nsCOMPtr<nsIFile> extra; + if (!GetMinidumpLimboDir(getter_AddRefs(extra))) { + return false; + } + + extra->Append(id + u".extra"_ns); + PathString path; +#ifdef XP_WIN + NS_ENSURE_SUCCESS(extra->GetPath(path), false); +#elif defined(XP_UNIX) + NS_ENSURE_SUCCESS(extra->GetNativePath(path), false); +#endif + + PlatformWriter pw(path.get()); + return WriteExtraFile(pw, annotations); +} + +static void ReadExceptionTimeAnnotations(AnnotationTable& aAnnotations, + ProcessId aPid) { + // Read exception-time annotations + StaticMutexAutoLock pidMapLock(processMapLock); + if (aPid && processToCrashFd.count(aPid)) { + PRFileDesc* prFd = processToCrashFd[aPid]; + processToCrashFd.erase(aPid); + ReadAndValidateExceptionTimeAnnotations(prFd, aAnnotations); + PR_Close(prFd); + } +} + +static void PopulateContentProcessAnnotations(AnnotationTable& aAnnotations) { + MergeContentCrashAnnotations(aAnnotations); + AddCommonAnnotations(aAnnotations); +} + +// It really only makes sense to call this function when +// ShouldReport() is true. +// Uses dumpFile's filename to generate memoryReport's filename (same name with +// a different extension) +static bool MoveToPending(nsIFile* dumpFile, nsIFile* extraFile, + nsIFile* memoryReport) { + nsCOMPtr<nsIFile> pendingDir; + if (!GetPendingDir(getter_AddRefs(pendingDir))) return false; + + if (NS_FAILED(dumpFile->MoveTo(pendingDir, u""_ns))) { + return false; + } + + if (extraFile && NS_FAILED(extraFile->MoveTo(pendingDir, u""_ns))) { + return false; + } + + if (memoryReport) { + nsAutoString leafName; + nsresult rv = dumpFile->GetLeafName(leafName); + if (NS_FAILED(rv)) { + return false; + } + // Generate the correct memory report filename from the dumpFile's name + leafName.Replace( + leafName.Length() - 4, 4, + static_cast<nsString>(CONVERT_XP_CHAR_TO_UTF16(memoryReportExtension))); + if (NS_FAILED(memoryReport->MoveTo(pendingDir, leafName))) { + return false; + } + } + + return true; +} + +static void MaybeAnnotateDumperError(const ClientInfo& aClientInfo, + AnnotationTable& aAnnotations) { +#if defined(MOZ_OXIDIZED_BREAKPAD) + if (aClientInfo.had_error()) { + aAnnotations[Annotation::DumperError] = *aClientInfo.error_msg(); + } +#endif +} + +static void OnChildProcessDumpRequested( + void* aContext, const ClientInfo& aClientInfo, + const xpstring& aFilePath) MOZ_NO_THREAD_SAFETY_ANALYSIS { + nsCOMPtr<nsIFile> minidump; + + // Hold the mutex until the current dump request is complete, to + // prevent UnsetExceptionHandler() from pulling the rug out from + // under us. + MutexAutoLock lock(*dumpSafetyLock); + if (!isSafeToDump) return; + + CreateFileFromPath(aFilePath, getter_AddRefs(minidump)); + + ProcessId pid = aClientInfo.pid(); + if (ShouldReport()) { + nsCOMPtr<nsIFile> memoryReport; + if (!memoryReportPath.empty()) { + CreateFileFromPath(memoryReportPath, getter_AddRefs(memoryReport)); + MOZ_ASSERT(memoryReport); + } + MoveToPending(minidump, nullptr, memoryReport); + } + + { +#ifdef MOZ_CRASHREPORTER_INJECTOR + bool runCallback; +#endif + { + dumpMapLock->Lock(); + ChildProcessData* pd = pidToMinidump->PutEntry(pid); + MOZ_ASSERT(!pd->minidump); + pd->minidump = minidump; + pd->sequence = ++crashSequence; + pd->annotations = MakeUnique<AnnotationTable>(); + PopulateContentProcessAnnotations(*(pd->annotations)); + MaybeAnnotateDumperError(aClientInfo, *(pd->annotations)); + +#ifdef MOZ_CRASHREPORTER_INJECTOR + runCallback = nullptr != pd->callback; +#endif + } +#ifdef MOZ_CRASHREPORTER_INJECTOR + if (runCallback) NS_DispatchToMainThread(new ReportInjectedCrash(pid)); +#endif + } +} + +static void OnChildProcessDumpWritten(void* aContext, + const ClientInfo& aClientInfo) + MOZ_NO_THREAD_SAFETY_ANALYSIS { + ProcessId pid = aClientInfo.pid(); + ChildProcessData* pd = pidToMinidump->GetEntry(pid); + MOZ_ASSERT(pd); + if (!pd->minidumpOnly) { + ReadExceptionTimeAnnotations(*(pd->annotations), pid); + } + dumpMapLock->Unlock(); +} + +static bool OOPInitialized() { return pidToMinidump != nullptr; } + +void OOPInit() { + class ProxyToMainThread : public Runnable { + public: + ProxyToMainThread() : Runnable("nsExceptionHandler::ProxyToMainThread") {} + NS_IMETHOD Run() override { + OOPInit(); + return NS_OK; + } + }; + if (!NS_IsMainThread()) { + // This logic needs to run on the main thread + nsCOMPtr<nsIThread> mainThread = do_GetMainThread(); + mozilla::SyncRunnable::DispatchToThread(mainThread, + new ProxyToMainThread()); + return; + } + + if (OOPInitialized()) return; + + MOZ_ASSERT(NS_IsMainThread()); + + MOZ_ASSERT(gExceptionHandler != nullptr, + "attempt to initialize OOP crash reporter before in-process " + "crashreporter!"); + +#if defined(XP_WIN) + childCrashNotifyPipe = + mozilla::Smprintf("\\\\.\\pipe\\gecko-crash-server-pipe.%i", + static_cast<int>(::GetCurrentProcessId())) + .release(); + + const std::wstring dumpPath = gExceptionHandler->dump_path(); + crashServer = new CrashGenerationServer( + std::wstring(NS_ConvertASCIItoUTF16(childCrashNotifyPipe).get()), + nullptr, // default security attributes + nullptr, nullptr, // we don't care about process connect here + OnChildProcessDumpRequested, nullptr, OnChildProcessDumpWritten, nullptr, + nullptr, // we don't care about process exit here + nullptr, nullptr, // we don't care about upload request here + true, // automatically generate dumps + &dumpPath); + + if (sIncludeContextHeap) { + crashServer->set_include_context_heap(sIncludeContextHeap); + } + +#elif defined(XP_LINUX) + if (!CrashGenerationServer::CreateReportChannel(&serverSocketFd, + &clientSocketFd)) + MOZ_CRASH("can't create crash reporter socketpair()"); + + const std::string dumpPath = + gExceptionHandler->minidump_descriptor().directory(); + crashServer = new CrashGenerationServer( + serverSocketFd, OnChildProcessDumpRequested, nullptr, + OnChildProcessDumpWritten, nullptr, true, &dumpPath); + +#elif defined(XP_MACOSX) + childCrashNotifyPipe = mozilla::Smprintf("gecko-crash-server-pipe.%i", + static_cast<int>(getpid())) + .release(); + const std::string dumpPath = gExceptionHandler->dump_path(); + + crashServer = new CrashGenerationServer( + childCrashNotifyPipe, nullptr, nullptr, OnChildProcessDumpRequested, + nullptr, OnChildProcessDumpWritten, nullptr, + true, // automatically generate dumps + dumpPath); +#endif + + if (!crashServer->Start()) MOZ_CRASH("can't start crash reporter server()"); + + pidToMinidump = new ChildMinidumpMap(); + + dumpMapLock = new Mutex("CrashReporter::dumpMapLock"); + + FindPendingDir(); + UpdateCrashEventsDir(); +} + +static void OOPDeinit() { + if (!OOPInitialized()) { + NS_WARNING("OOPDeinit() without successful OOPInit()"); + return; + } + +#ifdef MOZ_CRASHREPORTER_INJECTOR + if (sInjectorThread) { + sInjectorThread->Shutdown(); + NS_RELEASE(sInjectorThread); + } +#endif + + delete crashServer; + crashServer = nullptr; + + delete dumpMapLock; + dumpMapLock = nullptr; + + delete pidToMinidump; + pidToMinidump = nullptr; + +#if defined(XP_WIN) || defined(XP_MACOSX) + free(childCrashNotifyPipe); + childCrashNotifyPipe = nullptr; +#endif +} + +#if defined(XP_WIN) || defined(XP_MACOSX) +// Parent-side API for children +const char* GetChildNotificationPipe() { + if (!GetEnabled()) return kNullNotifyPipe; + + MOZ_ASSERT(OOPInitialized()); + + return childCrashNotifyPipe; +} +#endif + +#ifdef MOZ_CRASHREPORTER_INJECTOR +void InjectCrashReporterIntoProcess(DWORD processID, + InjectorCrashCallback* cb) { + if (!GetEnabled()) return; + + if (!OOPInitialized()) OOPInit(); + + if (!sInjectorThread) { + if (NS_FAILED(NS_NewNamedThread("CrashRep Inject", &sInjectorThread))) + return; + } + + { + MutexAutoLock lock(*dumpMapLock); + ChildProcessData* pd = pidToMinidump->PutEntry(processID); + MOZ_ASSERT(!pd->minidump && !pd->callback); + pd->callback = cb; + pd->minidumpOnly = true; + } + + nsCOMPtr<nsIRunnable> r = new InjectCrashRunnable(processID); + sInjectorThread->Dispatch(r, nsIEventTarget::DISPATCH_NORMAL); +} + +NS_IMETHODIMP +ReportInjectedCrash::Run() { + // Crash reporting may have been disabled after this method was dispatched + if (!OOPInitialized()) return NS_OK; + + InjectorCrashCallback* cb; + { + MutexAutoLock lock(*dumpMapLock); + ChildProcessData* pd = pidToMinidump->GetEntry(mPID); + if (!pd || !pd->callback) return NS_OK; + + MOZ_ASSERT(pd->minidump); + + cb = pd->callback; + } + + cb->OnCrash(mPID); + return NS_OK; +} + +void UnregisterInjectorCallback(DWORD processID) { + if (!OOPInitialized()) return; + + MutexAutoLock lock(*dumpMapLock); + pidToMinidump->RemoveEntry(processID); +} + +#endif // MOZ_CRASHREPORTER_INJECTOR + +void RegisterChildCrashAnnotationFileDescriptor(ProcessId aProcess, + PRFileDesc* aFd) { + StaticMutexAutoLock pidMapLock(processMapLock); + processToCrashFd[aProcess] = aFd; +} + +void DeregisterChildCrashAnnotationFileDescriptor(ProcessId aProcess) { + StaticMutexAutoLock pidMapLock(processMapLock); + auto it = processToCrashFd.find(aProcess); + if (it != processToCrashFd.end()) { + PR_Close(it->second); + processToCrashFd.erase(it); + } +} + +#if defined(XP_LINUX) + +// Parent-side API for children +bool CreateNotificationPipeForChild(int* childCrashFd, int* childCrashRemapFd) { + if (!GetEnabled()) { + *childCrashFd = -1; + *childCrashRemapFd = -1; + return true; + } + + MOZ_ASSERT(OOPInitialized()); + + *childCrashFd = clientSocketFd; + *childCrashRemapFd = gMagicChildCrashReportFd; + + return true; +} + +#endif // defined(XP_LINUX) + +bool SetRemoteExceptionHandler(const char* aCrashPipe, + FileHandle aCrashTimeAnnotationFile) { + MOZ_ASSERT(!gExceptionHandler, "crash client already init'd"); + RegisterRuntimeExceptionModule(); + InitializeAnnotationFacilities(); + +#if defined(XP_WIN) + gChildCrashAnnotationReportFd = aCrashTimeAnnotationFile; + gExceptionHandler = new google_breakpad::ExceptionHandler( + L"", ChildFilter, ChildMinidumpCallback, + nullptr, // no callback context + google_breakpad::ExceptionHandler::HANDLER_ALL, GetMinidumpType(), + NS_ConvertASCIItoUTF16(aCrashPipe).get(), nullptr); + gExceptionHandler->set_handle_debug_exceptions(true); + +# if defined(HAVE_64BIT_BUILD) + SetJitExceptionHandler(); +# endif +#elif defined(XP_LINUX) + // MinidumpDescriptor requires a non-empty path. + google_breakpad::MinidumpDescriptor path("."); + + gExceptionHandler = new google_breakpad::ExceptionHandler( + path, ChildFilter, ChildMinidumpCallback, + nullptr, // no callback context + true, // install signal handlers + gMagicChildCrashReportFd); +#elif defined(XP_MACOSX) + gExceptionHandler = new google_breakpad::ExceptionHandler( + "", ChildFilter, ChildMinidumpCallback, + nullptr, // no callback context + true, // install signal handlers + aCrashPipe); +#endif + + RecordMainThreadId(); + + oldTerminateHandler = std::set_terminate(&TerminateHandler); + + // we either do remote or nothing, no fallback to regular crash reporting + return gExceptionHandler->IsOutOfProcess(); +} + +void GetAnnotation(uint32_t childPid, Annotation annotation, + nsACString& outStr) { + if (!GetEnabled()) { + return; + } + + MutexAutoLock lock(*dumpMapLock); + + ChildProcessData* pd = pidToMinidump->GetEntry(childPid); + if (!pd) { + return; + } + + outStr = (*pd->annotations)[annotation]; +} + +bool TakeMinidumpForChild(uint32_t childPid, nsIFile** dump, + AnnotationTable& aAnnotations, uint32_t* aSequence) { + if (!GetEnabled()) return false; + + MutexAutoLock lock(*dumpMapLock); + + ChildProcessData* pd = pidToMinidump->GetEntry(childPid); + if (!pd) return false; + + NS_IF_ADDREF(*dump = pd->minidump); + // Only plugin process minidumps taken using the injector don't have + // annotations. + if (!pd->minidumpOnly) { + aAnnotations = *(pd->annotations); + } + if (aSequence) { + *aSequence = pd->sequence; + } + + pidToMinidump->RemoveEntry(pd); + + return !!*dump; +} + +bool FinalizeOrphanedMinidump(uint32_t aChildPid, GeckoProcessType aType, + nsString* aDumpId) { + AnnotationTable annotations; + nsCOMPtr<nsIFile> minidump; + + if (!TakeMinidumpForChild(aChildPid, getter_AddRefs(minidump), annotations)) { + return false; + } + + nsAutoString id; + if (!GetIDFromMinidump(minidump, id)) { + return false; + } + + if (aDumpId) { + *aDumpId = id; + } + + annotations[Annotation::ProcessType] = + XRE_ChildProcessTypeToAnnotation(aType); + + return WriteExtraFile(id, annotations); +} + +#ifdef XP_WIN + +// Function invoked by the WER runtime exception handler running in an +// external process. This function isn't used anywhere inside Gecko directly +// but rather invoked via CreateRemoteThread() in the main process. +DWORD WINAPI WerNotifyProc(LPVOID aParameter) { + const WindowsErrorReportingData* werData = + static_cast<const WindowsErrorReportingData*>(aParameter); + + // Hold the mutex until the current dump request is complete, to + // prevent UnsetExceptionHandler() from pulling the rug out from + // under us. + MutexAutoLock safetyLock(*dumpSafetyLock); + if (!isSafeToDump || !ShouldReport()) { + return S_OK; + } + + ProcessId pid = werData->mChildPid; + nsCOMPtr<nsIFile> minidump; + if (!GetPendingDir(getter_AddRefs(minidump))) { + return S_OK; + } + xpstring minidump_native_name(werData->mMinidumpFile, + werData->mMinidumpFile + 40); + nsString minidump_name(minidump_native_name.c_str()); + minidump->Append(minidump_name); + + { + MutexAutoLock lock(*dumpMapLock); + ChildProcessData* pd = pidToMinidump->PutEntry(pid); + MOZ_ASSERT(!pd->minidump); + pd->minidump = minidump; + pd->sequence = ++crashSequence; + pd->annotations = MakeUnique<AnnotationTable>(); + (*pd->annotations)[Annotation::WindowsErrorReporting] = "1"_ns; + if (werData->mOOMAllocationSize > 0) { + char buffer[32] = {}; + XP_STOA(werData->mOOMAllocationSize, buffer); + (*pd->annotations)[Annotation::OOMAllocationSize] = buffer; + } + + PopulateContentProcessAnnotations(*(pd->annotations)); + } + + return S_OK; +} + +#endif // XP_WIN + +//----------------------------------------------------------------------------- +// CreateMinidumpsAndPair() and helpers +// + +/* + * Renames the stand alone dump file aDumpFile to: + * |aOwnerDumpFile-aDumpFileProcessType.dmp| + * and moves it into the same directory as aOwnerDumpFile. Does not + * modify aOwnerDumpFile in any way. + * + * @param aDumpFile - the dump file to associate with aOwnerDumpFile. + * @param aOwnerDumpFile - the new owner of aDumpFile. + * @param aDumpFileProcessType - process name associated with aDumpFile. + */ +static void RenameAdditionalHangMinidump(nsIFile* minidump, + nsIFile* childMinidump, + const nsACString& name) { + nsCOMPtr<nsIFile> directory; + childMinidump->GetParent(getter_AddRefs(directory)); + if (!directory) return; + + nsAutoCString leafName; + childMinidump->GetNativeLeafName(leafName); + + // turn "<id>.dmp" into "<id>-<name>.dmp + leafName.Insert("-"_ns + name, leafName.Length() - 4); + + if (NS_FAILED(minidump->MoveToNative(directory, leafName))) { + NS_WARNING("RenameAdditionalHangMinidump failed to move minidump."); + } +} + +// Stores the minidump in the nsIFile pointed by the |context| parameter. +static bool PairedDumpCallback( +#ifdef XP_LINUX + const MinidumpDescriptor& descriptor, +#else + const XP_CHAR* dump_path, const XP_CHAR* minidump_id, +#endif + void* context, +#ifdef XP_WIN + EXCEPTION_POINTERS* /*unused*/, MDRawAssertionInfo* /*unused*/, +#endif + const phc::AddrInfo* addrInfo, bool succeeded) { + XP_CHAR* path = static_cast<XP_CHAR*>(context); + size_t size = XP_PATH_MAX; + +#ifdef XP_LINUX + Concat(path, descriptor.path(), &size); +#else + path = Concat(path, dump_path, &size); + path = Concat(path, XP_PATH_SEPARATOR, &size); + path = Concat(path, minidump_id, &size); + Concat(path, dumpFileExtension, &size); +#endif + + return true; +} + +ThreadId CurrentThreadId() { +#if defined(XP_WIN) + return ::GetCurrentThreadId(); +#elif defined(XP_LINUX) + return sys_gettid(); +#elif defined(XP_MACOSX) + // Just return an index, since Mach ports can't be directly serialized + thread_act_port_array_t threads_for_task; + mach_msg_type_number_t thread_count; + + if (task_threads(mach_task_self(), &threads_for_task, &thread_count)) + return -1; + + for (unsigned int i = 0; i < thread_count; ++i) { + if (threads_for_task[i] == mach_thread_self()) return i; + } + abort(); +#else +# error "Unsupported platform" +#endif +} + +#ifdef XP_MACOSX +static mach_port_t GetChildThread(ProcessHandle childPid, + ThreadId childBlamedThread) { + mach_port_t childThread = MACH_PORT_NULL; + thread_act_port_array_t threads_for_task; + mach_msg_type_number_t thread_count; + + if (task_threads(childPid, &threads_for_task, &thread_count) == + KERN_SUCCESS && + childBlamedThread < thread_count) { + childThread = threads_for_task[childBlamedThread]; + } + + return childThread; +} +#endif + +bool CreateMinidumpsAndPair(ProcessHandle aTargetHandle, + ThreadId aTargetBlamedThread, + const nsACString& aIncomingPairName, + AnnotationTable& aTargetAnnotations, + nsIFile** aMainDumpOut) { + if (!GetEnabled()) { + return false; + } + + AutoIOInterposerDisable disableIOInterposition; + +#ifdef XP_MACOSX + mach_port_t targetThread = GetChildThread(aTargetHandle, aTargetBlamedThread); +#else + ThreadId targetThread = aTargetBlamedThread; +#endif + + xpstring dump_path; +#ifndef XP_LINUX + dump_path = gExceptionHandler->dump_path(); +#else + dump_path = gExceptionHandler->minidump_descriptor().directory(); +#endif + + // Ugly, but due to Breakpad limitations we can't allocate memory in the + // callback when generating a dump of the calling process. + XP_CHAR minidumpPath[XP_PATH_MAX] = {}; + + // dump the target + if (!google_breakpad::ExceptionHandler::WriteMinidumpForChild( + aTargetHandle, targetThread, dump_path, PairedDumpCallback, + static_cast<void*>(minidumpPath) +#ifdef XP_WIN + , + GetMinidumpType() +#endif + )) { + return false; + } + + nsCOMPtr<nsIFile> targetMinidump; + CreateFileFromPath(xpstring(minidumpPath), getter_AddRefs(targetMinidump)); + + // Create a dump of this process. + if (!google_breakpad::ExceptionHandler::WriteMinidump( + dump_path, +#ifdef XP_MACOSX + true, +#endif + PairedDumpCallback, static_cast<void*>(minidumpPath) +#ifdef XP_WIN + , + GetMinidumpType() +#endif + )) { + targetMinidump->Remove(false); + return false; + } + + nsCOMPtr<nsIFile> incomingDump; + CreateFileFromPath(xpstring(minidumpPath), getter_AddRefs(incomingDump)); + + RenameAdditionalHangMinidump(incomingDump, targetMinidump, aIncomingPairName); + + if (ShouldReport()) { + MoveToPending(targetMinidump, nullptr, nullptr); + MoveToPending(incomingDump, nullptr, nullptr); + } +#if defined(DEBUG) && defined(HAS_DLL_BLOCKLIST) + DllBlocklist_Shutdown(); +#endif + + PopulateContentProcessAnnotations(aTargetAnnotations); + if (FlushContentProcessAnnotations(aTargetHandle)) { + ProcessId targetPid = base::GetProcId(aTargetHandle); + ReadExceptionTimeAnnotations(aTargetAnnotations, targetPid); + } + + targetMinidump.forget(aMainDumpOut); + + return true; +} + +bool UnsetRemoteExceptionHandler(bool wasSet) { + // On Linux we don't unset breakpad's exception handler if the sandbox is + // enabled because it requires invoking `sigaltstack` and we don't want to + // allow that syscall in the sandbox. See bug 1622452. +#if !defined(XP_LINUX) || !defined(MOZ_SANDBOX) + if (wasSet) { + std::set_terminate(oldTerminateHandler); + delete gExceptionHandler; + gExceptionHandler = nullptr; + } +#endif + TeardownAnnotationFacilities(); + + return true; +} + +#if defined(MOZ_WIDGET_ANDROID) +void SetNotificationPipeForChild(int childCrashFd) { + gMagicChildCrashReportFd = childCrashFd; +} + +void SetCrashAnnotationPipeForChild(int childCrashAnnotationFd) { + gChildCrashAnnotationReportFd = childCrashAnnotationFd; +} +#endif + +} // namespace CrashReporter |