1 files changed, 101 insertions, 0 deletions
diff --git a/security/sandbox/chromium-shim/sandbox/win/loggingCallbacks.h b/security/sandbox/chromium-shim/sandbox/win/loggingCallbacks.h
new file mode 100644
index 0000000000..3c5f8eea89
--- /dev/null
+++ b/security/sandbox/chromium-shim/sandbox/win/loggingCallbacks.h
@@ -0,0 +1,101 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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/. */
+
+#ifndef security_sandbox_loggingCallbacks_h__
+#define security_sandbox_loggingCallbacks_h__
+
+#include <sstream>
+
+#include "mozilla/Logging.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/StaticPrefs_security.h"
+#include "mozilla/sandboxing/loggingTypes.h"
+#include "nsContentUtils.h"
+
+#include "mozilla/StackWalk.h"
+
+namespace mozilla {
+
+static LazyLogModule sSandboxTargetLog("SandboxTarget");
+
+#define LOG_D(...) MOZ_LOG(sSandboxTargetLog, LogLevel::Debug, (__VA_ARGS__))
+
+namespace sandboxing {
+
+// NS_WalkStackCallback to write a formatted stack frame to an ostringstream.
+static void
+StackFrameToOStringStream(uint32_t aFrameNumber, void* aPC, void* aSP,
+                          void* aClosure)
+{
+  std::ostringstream* stream = static_cast<std::ostringstream*>(aClosure);
+  MozCodeAddressDetails details;
+  char buf[1024];
+  MozDescribeCodeAddress(aPC, &details);
+  MozFormatCodeAddressDetails(buf, sizeof(buf), aFrameNumber, aPC, &details);
+  *stream << std::endl << "--" << buf;
+  stream->flush();
+}
+
+// Log to the browser console and, if DEBUG build, stderr.
+static void
+Log(const char* aMessageType,
+    const char* aFunctionName,
+    const char* aContext,
+    const bool aShouldLogStackTrace = false,
+    const void* aFirstFramePC = nullptr)
+{
+  std::ostringstream msgStream;
+  msgStream << "Process Sandbox " << aMessageType << ": " << aFunctionName;
+  if (aContext) {
+    msgStream << " for : " << aContext;
+  }
+
+#if defined(MOZ_SANDBOX)
+  // We can only log the stack trace on process types where we know that the
+  // sandbox won't prevent it.
+  if (XRE_IsContentProcess() && aShouldLogStackTrace) {
+    auto stackTraceDepth =
+        StaticPrefs::security_sandbox_windows_log_stackTraceDepth();
+    if (stackTraceDepth) {
+      msgStream << std::endl << "Stack Trace:";
+      MozStackWalk(StackFrameToOStringStream, aFirstFramePC, stackTraceDepth,
+                   &msgStream);
+    }
+  }
+#endif
+  std::string msg = msgStream.str();
+#if defined(DEBUG)
+  // Use NS_DebugBreak directly as we want child process prefix, but not source
+  // file or line number.
+  NS_DebugBreak(NS_DEBUG_WARNING, nullptr, msg.c_str(), nullptr, -1);
+#endif
+
+  if (nsContentUtils::IsInitialized()) {
+    nsContentUtils::LogMessageToConsole(msg.c_str());
+  }
+
+  // As we don't always have the facility to log to console use MOZ_LOG as well.
+  LOG_D("%s", msg.c_str());
+}
+
+// Initialize sandbox logging if required.
+static void
+InitLoggingIfRequired(ProvideLogFunctionCb aProvideLogFunctionCb)
+{
+  if (!aProvideLogFunctionCb) {
+    return;
+  }
+
+  if (Preferences::GetBool("security.sandbox.logging.enabled") ||
+      PR_GetEnv("MOZ_SANDBOX_LOGGING")) {
+    aProvideLogFunctionCb(Log);
+  }
+}
+
+} // sandboxing
+} // mozilla
+
+#endif // security_sandbox_loggingCallbacks_h__