1 | // Copyright (c) 2012 Google Inc. |
2 | // All rights reserved. |
3 | // |
4 | // Redistribution and use in source and binary forms, with or without |
5 | // modification, are permitted provided that the following conditions are |
6 | // met: |
7 | // |
8 | // * Redistributions of source code must retain the above copyright |
9 | // notice, this list of conditions and the following disclaimer. |
10 | // * Redistributions in binary form must reproduce the above |
11 | // copyright notice, this list of conditions and the following disclaimer |
12 | // in the documentation and/or other materials provided with the |
13 | // distribution. |
14 | // * Neither the name of Google Inc. nor the names of its |
15 | // contributors may be used to endorse or promote products derived from |
16 | // this software without specific prior written permission. |
17 | // |
18 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
19 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
20 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
21 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
22 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
23 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
24 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
25 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
26 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
27 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
28 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
29 | |
30 | #include "client/linux/log/log.h" |
31 | |
32 | #if defined(__ANDROID__) |
33 | #include <android/log.h> |
34 | #include <dlfcn.h> |
35 | #else |
36 | #include "third_party/lss/linux_syscall_support.h" |
37 | #endif |
38 | |
39 | namespace logger { |
40 | |
41 | #if defined(__ANDROID__) |
42 | namespace { |
43 | |
44 | // __android_log_buf_write() is not exported in the NDK and is being used by |
45 | // dynamic runtime linking. Its declaration is taken from Android's |
46 | // system/core/include/log/log.h. |
47 | using AndroidLogBufferWriteFunc = int (*)(int bufID, int prio, const char* tag, |
48 | const char* text); |
49 | const int kAndroidCrashLogId = 4; // From LOG_ID_CRASH in log.h. |
50 | const char kAndroidLogTag[] = "google-breakpad" ; |
51 | |
52 | bool g_crash_log_initialized = false; |
53 | AndroidLogBufferWriteFunc g_android_log_buf_write = nullptr; |
54 | |
55 | } // namespace |
56 | |
57 | void initializeCrashLogWriter() { |
58 | if (g_crash_log_initialized) |
59 | return; |
60 | g_android_log_buf_write = reinterpret_cast<AndroidLogBufferWriteFunc>( |
61 | dlsym(RTLD_DEFAULT, "__android_log_buf_write" )); |
62 | g_crash_log_initialized = true; |
63 | } |
64 | |
65 | int writeToCrashLog(const char* buf) { |
66 | // Try writing to the crash log ring buffer. If not available, fall back to |
67 | // the standard log buffer. |
68 | if (g_android_log_buf_write) { |
69 | return g_android_log_buf_write(kAndroidCrashLogId, ANDROID_LOG_FATAL, |
70 | kAndroidLogTag, buf); |
71 | } |
72 | return __android_log_write(ANDROID_LOG_FATAL, kAndroidLogTag, buf); |
73 | } |
74 | #endif |
75 | |
76 | int write(const char* buf, size_t nbytes) { |
77 | #if defined(__ANDROID__) |
78 | return __android_log_write(ANDROID_LOG_WARN, kAndroidLogTag, buf); |
79 | #else |
80 | return sys_write(2, buf, nbytes); |
81 | #endif |
82 | } |
83 | |
84 | } // namespace logger |
85 | |