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Diffstat (limited to '')
| -rw-r--r-- | mozglue/android/APKOpen.cpp | 552 |
1 files changed, 552 insertions, 0 deletions
diff --git a/mozglue/android/APKOpen.cpp b/mozglue/android/APKOpen.cpp new file mode 100644 index 0000000000..9f41ca7bd2 --- /dev/null +++ b/mozglue/android/APKOpen.cpp @@ -0,0 +1,552 @@ +/* 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/. */ + +/* + * This custom library loading code is only meant to be called + * during initialization. As a result, it takes no special + * precautions to be threadsafe. Any of the library loading functions + * like mozload should not be available to other code. + */ + +#include <jni.h> +#include <android/log.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/mman.h> +#include <sys/limits.h> +#include <errno.h> +#include <string.h> +#include <stdio.h> +#include <stdlib.h> +#include <fcntl.h> +#include <unistd.h> +#include <zlib.h> +#include "dlfcn.h" +#include "APKOpen.h" +#include <sys/time.h> +#include <sys/syscall.h> +#include <sys/resource.h> +#include <sys/prctl.h> +#include "sqlite3.h" +#include "Linker.h" +#include "BaseProfiler.h" +#include "application.ini.h" + +#include "mozilla/arm.h" +#include "mozilla/Bootstrap.h" +#include "mozilla/Printf.h" +#include "mozilla/Sprintf.h" +#include "mozilla/TimeStamp.h" +#include "mozilla/Try.h" +#include "mozilla/UniquePtr.h" +#include "XREChildData.h" + +/* Android headers don't define RUSAGE_THREAD */ +#ifndef RUSAGE_THREAD +# define RUSAGE_THREAD 1 +#endif + +#ifndef RELEASE_OR_BETA +/* Official builds have the debuggable flag set to false, which disables + * the backtrace dumper from bionic. However, as it is useful for native + * crashes happening before the crash reporter is registered, re-enable + * it on non release builds (i.e. nightly and aurora). + * Using a constructor so that it is re-enabled as soon as libmozglue.so + * is loaded. + */ +__attribute__((constructor)) void make_dumpable() { prctl(PR_SET_DUMPABLE, 1); } +#endif + +typedef int mozglueresult; + +using LoadGeckoLibsResult = + mozilla::Result<mozilla::Ok, mozilla::BootstrapError>; + +enum StartupEvent { +#define mozilla_StartupTimeline_Event(ev, z) ev, +#include "StartupTimeline.h" +#undef mozilla_StartupTimeline_Event + MAX_STARTUP_EVENT_ID +}; + +using namespace mozilla; + +void JNI_Throw(JNIEnv* jenv, const char* classname, const char* msg) { + __android_log_print(ANDROID_LOG_ERROR, "GeckoLibLoad", "Throw\n"); + jclass cls = jenv->FindClass(classname); + if (cls == nullptr) { + __android_log_print( + ANDROID_LOG_ERROR, "GeckoLibLoad", + "Couldn't find exception class (or exception pending) %s\n", classname); + exit(FAILURE); + } + int rc = jenv->ThrowNew(cls, msg); + if (rc < 0) { + __android_log_print(ANDROID_LOG_ERROR, "GeckoLibLoad", + "Error throwing exception %s\n", msg); + exit(FAILURE); + } + jenv->DeleteLocalRef(cls); +} + +namespace { +JavaVM* sJavaVM; +} + +void abortThroughJava(const char* msg) { + struct sigaction sigact = {}; + if (__wrap_sigaction(SIGSEGV, nullptr, &sigact)) { + return; // sigaction call failed. + } + + Dl_info info = {}; + if ((sigact.sa_flags & SA_SIGINFO) && + __wrap_dladdr(reinterpret_cast<void*>(sigact.sa_sigaction), &info) && + info.dli_fname && strstr(info.dli_fname, "libxul.so")) { + return; // Existing signal handler is in libxul (i.e. we have crash + // reporter). + } + + JNIEnv* env = nullptr; + if (!sJavaVM || + sJavaVM->AttachCurrentThreadAsDaemon(&env, nullptr) != JNI_OK) { + return; + } + + if (!env || env->PushLocalFrame(2) != JNI_OK) { + return; + } + + jclass loader = env->FindClass("org/mozilla/gecko/mozglue/GeckoLoader"); + if (!loader) { + return; + } + + jmethodID method = + env->GetStaticMethodID(loader, "abort", "(Ljava/lang/String;)V"); + jstring str = env->NewStringUTF(msg); + + if (method && str) { + env->CallStaticVoidMethod(loader, method, str); + } + + env->PopLocalFrame(nullptr); +} + +Bootstrap::UniquePtr gBootstrap; +#ifndef MOZ_FOLD_LIBS +static void* sqlite_handle = nullptr; +static void* nspr_handle = nullptr; +static void* plc_handle = nullptr; +#else +# define sqlite_handle nss_handle +# define nspr_handle nss_handle +# define plc_handle nss_handle +#endif +static void* nss_handle = nullptr; + +static UniquePtr<char[]> getUnpackedLibraryName(const char* libraryName) { + static const char* libdir = getenv("MOZ_ANDROID_LIBDIR"); + + size_t len = strlen(libdir) + 1 /* path separator */ + strlen(libraryName) + + 1; /* null terminator */ + auto file = MakeUnique<char[]>(len); + snprintf(file.get(), len, "%s/%s", libdir, libraryName); + return file; +} + +static void* dlopenLibrary(const char* libraryName) { + return __wrap_dlopen(getUnpackedLibraryName(libraryName).get(), + RTLD_GLOBAL | RTLD_LAZY); +} + +static void EnsureBaseProfilerInitialized() { + // There is no single entry-point into C++ code on Android. + // Instead, GeckoThread and GeckoLibLoader call various functions to load + // libraries one-by-one. + // We want to capture all that library loading in the profiler, so we need to + // kick off the base profiler at the beginning of whichever function is called + // first. + // We currently assume that all these functions are called on the same thread. + static bool sInitialized = false; + if (sInitialized) { + return; + } + + // The stack depth we observe here will be determined by the stack of + // whichever caller enters this code first. In practice this means that we may + // miss some root-most frames, which hopefully shouldn't ruin profiling. + int stackBase = 5; + mozilla::baseprofiler::profiler_init(&stackBase); + sInitialized = true; +} + +static LoadGeckoLibsResult loadGeckoLibs() { + TimeStamp t0 = TimeStamp::Now(); + struct rusage usage1_thread, usage1; + getrusage(RUSAGE_THREAD, &usage1_thread); + getrusage(RUSAGE_SELF, &usage1); + + static const char* libxul = getenv("MOZ_ANDROID_LIBDIR_OVERRIDE"); + MOZ_TRY_VAR( + gBootstrap, + GetBootstrap(libxul ? libxul : getUnpackedLibraryName("libxul.so").get(), + LibLoadingStrategy::ReadAhead)); + + TimeStamp t1 = TimeStamp::Now(); + struct rusage usage2_thread, usage2; + getrusage(RUSAGE_THREAD, &usage2_thread); + getrusage(RUSAGE_SELF, &usage2); + +#define RUSAGE_TIMEDIFF(u1, u2, field) \ + ((u2.ru_##field.tv_sec - u1.ru_##field.tv_sec) * 1000 + \ + (u2.ru_##field.tv_usec - u1.ru_##field.tv_usec) / 1000) + + __android_log_print(ANDROID_LOG_ERROR, "GeckoLibLoad", + "Loaded libs in %fms total, %ldms(%ldms) user, " + "%ldms(%ldms) system, %ld(%ld) faults", + (t1 - t0).ToMilliseconds(), + RUSAGE_TIMEDIFF(usage1_thread, usage2_thread, utime), + RUSAGE_TIMEDIFF(usage1, usage2, utime), + RUSAGE_TIMEDIFF(usage1_thread, usage2_thread, stime), + RUSAGE_TIMEDIFF(usage1, usage2, stime), + usage2_thread.ru_majflt - usage1_thread.ru_majflt, + usage2.ru_majflt - usage1.ru_majflt); + + gBootstrap->XRE_StartupTimelineRecord(LINKER_INITIALIZED, t0); + gBootstrap->XRE_StartupTimelineRecord(LIBRARIES_LOADED, t1); + return Ok(); +} + +static mozglueresult loadNSSLibs(); + +static mozglueresult loadSQLiteLibs() { + if (sqlite_handle) return SUCCESS; + +#ifdef MOZ_FOLD_LIBS + if (loadNSSLibs() != SUCCESS) return FAILURE; +#else + + sqlite_handle = dlopenLibrary("libmozsqlite3.so"); + if (!sqlite_handle) { + __android_log_print(ANDROID_LOG_ERROR, "GeckoLibLoad", + "Couldn't get a handle to libmozsqlite3!"); + return FAILURE; + } +#endif + + return SUCCESS; +} + +static mozglueresult loadNSSLibs() { + if (nss_handle && nspr_handle && plc_handle) return SUCCESS; + + nss_handle = dlopenLibrary("libnss3.so"); + +#ifndef MOZ_FOLD_LIBS + nspr_handle = dlopenLibrary("libnspr4.so"); + + plc_handle = dlopenLibrary("libplc4.so"); +#endif + + if (!nss_handle) { + __android_log_print(ANDROID_LOG_ERROR, "GeckoLibLoad", + "Couldn't get a handle to libnss3!"); + return FAILURE; + } + +#ifndef MOZ_FOLD_LIBS + if (!nspr_handle) { + __android_log_print(ANDROID_LOG_ERROR, "GeckoLibLoad", + "Couldn't get a handle to libnspr4!"); + return FAILURE; + } + + if (!plc_handle) { + __android_log_print(ANDROID_LOG_ERROR, "GeckoLibLoad", + "Couldn't get a handle to libplc4!"); + return FAILURE; + } +#endif + + return SUCCESS; +} + +extern "C" APKOPEN_EXPORT void MOZ_JNICALL +Java_org_mozilla_gecko_mozglue_GeckoLoader_loadGeckoLibsNative( + JNIEnv* jenv, jclass jGeckoAppShellClass) { + EnsureBaseProfilerInitialized(); + + jenv->GetJavaVM(&sJavaVM); + + LoadGeckoLibsResult res = loadGeckoLibs(); + if (res.isOk()) { + return; + } + + const BootstrapError& errorInfo = res.inspectErr(); + + auto msg = errorInfo.match( + [](const nsresult& aRv) { + return Smprintf("Error loading Gecko libraries: nsresult 0x%08X", + uint32_t(aRv)); + }, + [](const DLErrorType& aErr) { + return Smprintf("Error loading Gecko libraries: %s", aErr.get()); + }); + + JNI_Throw(jenv, "java/lang/Exception", msg.get()); +} + +extern "C" APKOPEN_EXPORT void MOZ_JNICALL +Java_org_mozilla_gecko_mozglue_GeckoLoader_loadSQLiteLibsNative( + JNIEnv* jenv, jclass jGeckoAppShellClass) { + EnsureBaseProfilerInitialized(); + + __android_log_print(ANDROID_LOG_ERROR, "GeckoLibLoad", "Load sqlite start\n"); + mozglueresult rv = loadSQLiteLibs(); + if (rv != SUCCESS) { + JNI_Throw(jenv, "java/lang/Exception", "Error loading sqlite libraries"); + } + __android_log_print(ANDROID_LOG_ERROR, "GeckoLibLoad", "Load sqlite done\n"); +} + +extern "C" APKOPEN_EXPORT void MOZ_JNICALL +Java_org_mozilla_gecko_mozglue_GeckoLoader_loadNSSLibsNative( + JNIEnv* jenv, jclass jGeckoAppShellClass) { + EnsureBaseProfilerInitialized(); + + __android_log_print(ANDROID_LOG_ERROR, "GeckoLibLoad", "Load nss start\n"); + mozglueresult rv = loadNSSLibs(); + if (rv != SUCCESS) { + JNI_Throw(jenv, "java/lang/Exception", "Error loading nss libraries"); + } + __android_log_print(ANDROID_LOG_ERROR, "GeckoLibLoad", "Load nss done\n"); +} + +static char** CreateArgvFromObjectArray(JNIEnv* jenv, jobjectArray jargs, + int* length) { + size_t stringCount = jenv->GetArrayLength(jargs); + + if (length) { + *length = stringCount; + } + + if (!stringCount) { + return nullptr; + } + + char** argv = new char*[stringCount + 1]; + + argv[stringCount] = nullptr; + + for (size_t ix = 0; ix < stringCount; ix++) { + jstring string = (jstring)(jenv->GetObjectArrayElement(jargs, ix)); + const char* rawString = jenv->GetStringUTFChars(string, nullptr); + const int strLength = jenv->GetStringUTFLength(string); + argv[ix] = strndup(rawString, strLength); + jenv->ReleaseStringUTFChars(string, rawString); + jenv->DeleteLocalRef(string); + } + + return argv; +} + +static void FreeArgv(char** argv, int argc) { + for (int ix = 0; ix < argc; ix++) { + // String was allocated with strndup, so need to use free to deallocate. + free(argv[ix]); + } + delete[] (argv); +} + +extern "C" APKOPEN_EXPORT void MOZ_JNICALL +Java_org_mozilla_gecko_mozglue_GeckoLoader_nativeRun( + JNIEnv* jenv, jclass jc, jobjectArray jargs, int prefsFd, int prefMapFd, + int ipcFd, int crashFd, bool xpcshell, jstring outFilePath) { + EnsureBaseProfilerInitialized(); + + int argc = 0; + char** argv = CreateArgvFromObjectArray(jenv, jargs, &argc); + + if (ipcFd < 0) { + if (gBootstrap == nullptr) { + FreeArgv(argv, argc); + return; + } + +#ifdef MOZ_LINKER + ElfLoader::Singleton.ExpectShutdown(false); +#endif + const char* outFilePathRaw = nullptr; + if (xpcshell) { + MOZ_ASSERT(outFilePath); + outFilePathRaw = jenv->GetStringUTFChars(outFilePath, nullptr); + } + gBootstrap->GeckoStart(jenv, argv, argc, sAppData, xpcshell, + outFilePathRaw); + if (outFilePathRaw) { + jenv->ReleaseStringUTFChars(outFilePath, outFilePathRaw); + } +#ifdef MOZ_LINKER + ElfLoader::Singleton.ExpectShutdown(true); +#endif + } else { + gBootstrap->XRE_SetAndroidChildFds(jenv, + {prefsFd, prefMapFd, ipcFd, crashFd}); + gBootstrap->XRE_SetProcessType(argv[argc - 1]); + + XREChildData childData; + gBootstrap->XRE_InitChildProcess(argc - 1, argv, &childData); + } + +#ifdef MOZ_WIDGET_ANDROID +# ifdef MOZ_PROFILE_GENERATE + gBootstrap->XRE_WriteLLVMProfData(); +# endif +#endif + gBootstrap.reset(); + FreeArgv(argv, argc); +} + +extern "C" APKOPEN_EXPORT mozglueresult ChildProcessInit(int argc, + char* argv[]) { + EnsureBaseProfilerInitialized(); + + if (loadNSSLibs() != SUCCESS) { + return FAILURE; + } + if (loadSQLiteLibs() != SUCCESS) { + return FAILURE; + } + if (loadGeckoLibs().isErr()) { + return FAILURE; + } + + gBootstrap->XRE_SetProcessType(argv[--argc]); + + XREChildData childData; + return NS_FAILED(gBootstrap->XRE_InitChildProcess(argc, argv, &childData)); +} + +// Does current process name end with ':media'? +static bool IsMediaProcess() { + pid_t pid = getpid(); + char str[256]; + SprintfLiteral(str, "/proc/%d/cmdline", pid); + FILE* f = fopen(str, "r"); + if (f) { + fgets(str, sizeof(str), f); + fclose(f); + const size_t strLen = strlen(str); + const char suffix[] = ":media"; + const size_t suffixLen = sizeof(suffix) - 1; + if (strLen >= suffixLen && + !strncmp(str + strLen - suffixLen, suffix, suffixLen)) { + return true; + } + } + return false; +} + +#ifndef SYS_rt_tgsigqueueinfo +# define SYS_rt_tgsigqueueinfo __NR_rt_tgsigqueueinfo +#endif +/* Copy of http://androidxref.com/7.1.1_r6/xref/bionic/linker/debugger.cpp#262, + * with debuggerd related code stripped. + * + * Copyright (C) 2008 The Android Open Source Project + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ +static void CatchFatalSignals(int num, siginfo_t* info, void* context) { + // It's possible somebody cleared the SA_SIGINFO flag, which would mean + // our "info" arg holds an undefined value. + struct sigaction action = {}; + if ((sigaction(num, nullptr, &action) < 0) || + !(action.sa_flags & SA_SIGINFO)) { + info = nullptr; + } + + // We need to return from the signal handler so that debuggerd can dump the + // thread that crashed, but returning here does not guarantee that the signal + // will be thrown again, even for SIGSEGV and friends, since the signal could + // have been sent manually. Resend the signal with rt_tgsigqueueinfo(2) to + // preserve the SA_SIGINFO contents. + signal(num, SIG_DFL); + + struct siginfo si; + if (!info) { + memset(&si, 0, sizeof(si)); + si.si_code = SI_USER; + si.si_pid = getpid(); + si.si_uid = getuid(); + info = &si; + } else if (info->si_code >= 0 || info->si_code == SI_TKILL) { + // rt_tgsigqueueinfo(2)'s documentation appears to be incorrect on kernels + // that contain commit 66dd34a (3.9+). The manpage claims to only allow + // negative si_code values that are not SI_TKILL, but 66dd34a changed the + // check to allow all si_code values in calls coming from inside the house. + } + + int rc = syscall(SYS_rt_tgsigqueueinfo, getpid(), gettid(), num, info); + if (rc != 0) { + __android_log_print(ANDROID_LOG_FATAL, "mozglue", + "failed to resend signal during crash: %s", + strerror(errno)); + _exit(0); + } +} + +extern "C" APKOPEN_EXPORT void MOZ_JNICALL +Java_org_mozilla_gecko_mozglue_GeckoLoader_suppressCrashDialog(JNIEnv* jenv, + jclass jc) { + MOZ_RELEASE_ASSERT(IsMediaProcess(), + "Suppress crash dialog only for media process"); + // Restoring to SIG_DFL will crash on x86/Android M devices (see bug 1374556) + // so copy Android code + // (http://androidxref.com/7.1.1_r6/xref/bionic/linker/debugger.cpp#302). See + // comments above CatchFatalSignals() for copyright notice. + struct sigaction action; + memset(&action, 0, sizeof(action)); + sigemptyset(&action.sa_mask); + action.sa_sigaction = &CatchFatalSignals; + action.sa_flags = SA_RESTART | SA_SIGINFO; + + // Use the alternate signal stack if available so we can catch stack + // overflows. + action.sa_flags |= SA_ONSTACK; + + sigaction(SIGABRT, &action, nullptr); + sigaction(SIGBUS, &action, nullptr); + sigaction(SIGFPE, &action, nullptr); + sigaction(SIGILL, &action, nullptr); + sigaction(SIGSEGV, &action, nullptr); +#if defined(SIGSTKFLT) + sigaction(SIGSTKFLT, &action, nullptr); +#endif + sigaction(SIGTRAP, &action, nullptr); +} |