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-rw-r--r--toolkit/crashreporter/breakpad-client/linux/log/log.cc84
-rw-r--r--toolkit/crashreporter/breakpad-client/linux/log/log.h55
2 files changed, 139 insertions, 0 deletions
diff --git a/toolkit/crashreporter/breakpad-client/linux/log/log.cc b/toolkit/crashreporter/breakpad-client/linux/log/log.cc
new file mode 100644
index 0000000000..3346acc6d8
--- /dev/null
+++ b/toolkit/crashreporter/breakpad-client/linux/log/log.cc
@@ -0,0 +1,84 @@
+// Copyright (c) 2012 Google Inc.
+// 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.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// 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.
+
+#include "linux/log/log.h"
+
+#if defined(__ANDROID__)
+#include <android/log.h>
+#include <dlfcn.h>
+#else
+#include "third_party/lss/linux_syscall_support.h"
+#endif
+
+namespace logger {
+
+#if defined(__ANDROID__)
+namespace {
+
+// __android_log_buf_write() is not exported in the NDK and is being used by
+// dynamic runtime linking. Its declaration is taken from Android's
+// system/core/include/log/log.h.
+using AndroidLogBufferWriteFunc = int (*)(int bufID, int prio, const char *tag,
+ const char *text);
+const int kAndroidCrashLogId = 4; // From LOG_ID_CRASH in log.h.
+const char kAndroidLogTag[] = "google-breakpad";
+
+bool g_crash_log_initialized = false;
+AndroidLogBufferWriteFunc g_android_log_buf_write = nullptr;
+
+} // namespace
+
+void initializeCrashLogWriter() {
+ if (g_crash_log_initialized)
+ return;
+ g_android_log_buf_write = reinterpret_cast<AndroidLogBufferWriteFunc>(
+ dlsym(RTLD_DEFAULT, "__android_log_buf_write"));
+ g_crash_log_initialized = true;
+}
+
+int writeToCrashLog(const char* buf) {
+ // Try writing to the crash log ring buffer. If not available, fall back to
+ // the standard log buffer.
+ if (g_android_log_buf_write) {
+ return g_android_log_buf_write(kAndroidCrashLogId, ANDROID_LOG_FATAL,
+ kAndroidLogTag, buf);
+ }
+ return __android_log_write(ANDROID_LOG_FATAL, kAndroidLogTag, buf);
+}
+#endif
+
+int write(const char* buf, size_t nbytes) {
+#if defined(__ANDROID__)
+ return __android_log_write(ANDROID_LOG_WARN, kAndroidLogTag, buf);
+#else
+ return sys_write(2, buf, nbytes);
+#endif
+}
+
+} // namespace logger
diff --git a/toolkit/crashreporter/breakpad-client/linux/log/log.h b/toolkit/crashreporter/breakpad-client/linux/log/log.h
new file mode 100644
index 0000000000..f94bbd5fb7
--- /dev/null
+++ b/toolkit/crashreporter/breakpad-client/linux/log/log.h
@@ -0,0 +1,55 @@
+// Copyright (c) 2012, Google Inc.
+// 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.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// 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.
+
+#ifndef CLIENT_LINUX_LOG_LOG_H_
+#define CLIENT_LINUX_LOG_LOG_H_
+
+#include <stddef.h>
+
+namespace logger {
+
+int write(const char* buf, size_t nbytes);
+
+// In the case of Android the log can be written to the default system log
+// (default behavior of write() above, or to the crash log (see
+// writeToCrashLog() below).
+#if defined(__ANDROID__)
+
+// The logger must be initialized in a non-compromised context.
+void initializeCrashLogWriter();
+
+// Once initialized, writeToCrashLog is safe to use in a compromised context,
+// even if the initialization failed, in which case this will silently fall
+// back on write().
+int writeToCrashLog(const char* buf);
+#endif
+
+} // namespace logger
+
+#endif // CLIENT_LINUX_LOG_LOG_H_