1 // Copyright (c) 2005, Google Inc.
2 // All rights reserved.
4 // Redistribution and use in source and binary forms, with or without
5 // modification, are permitted provided that the following conditions are
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
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.
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.
31 // Sanjay Ghemawat <opensource@google.com>
34 #include "internal_logging.h"
35 #include <stdarg.h> // for va_end, va_start
36 #include <stdio.h> // for vsnprintf, va_list, etc
37 #include <stdlib.h> // for abort
38 #include <string.h> // for strlen, memcpy
40 #include <unistd.h> // for write()
43 #include <gperftools/malloc_extension.h>
44 #include "base/abort.h"
45 #include "base/logging.h" // for perftools_vsnprintf
46 #include "base/spinlock.h" // for SpinLockHolder, SpinLock
48 static const int kLogBufSize = 800;
50 // Variables for storing crash output. Allocated statically since we
51 // may not be able to heap-allocate while crashing.
52 static SpinLock crash_lock(base::LINKER_INITIALIZED);
53 static bool crashed = false;
54 static const int kStatsBufferSize = 16 << 10;
55 static char stats_buffer[kStatsBufferSize] = { 0 };
59 static void WriteMessage(const char* msg, int length) {
60 write(STDERR_FILENO, msg, length);
63 void (*log_message_writer)(const char* msg, int length) = WriteMessage;
68 bool Add(const LogItem& item);
69 bool AddStr(const char* str, int n);
70 bool AddNum(uint64_t num, int base); // base must be 10 or 16.
72 static const int kBufSize = 200;
78 void Log(LogMode mode, const char* filename, int line,
79 LogItem a, LogItem b, LogItem c, LogItem d) {
81 state.p_ = state.buf_;
82 state.end_ = state.buf_ + sizeof(state.buf_);
83 state.AddStr(filename, strlen(filename))
84 && state.AddStr(":", 1)
85 && state.AddNum(line, 10)
86 && state.AddStr("]", 1)
92 // Teminate with newline
93 if (state.p_ >= state.end_) {
94 state.p_ = state.end_ - 1;
99 int msglen = state.p_ - state.buf_;
101 (*log_message_writer)(state.buf_, msglen);
105 bool first_crash = false;
107 SpinLockHolder l(&crash_lock);
114 (*log_message_writer)(state.buf_, msglen);
115 if (first_crash && mode == kCrashWithStats) {
116 MallocExtension::instance()->GetStats(stats_buffer, kStatsBufferSize);
117 (*log_message_writer)(stats_buffer, strlen(stats_buffer));
123 bool Logger::Add(const LogItem& item) {
124 // Separate items with spaces
132 return AddStr(item.u_.str, strlen(item.u_.str));
133 case LogItem::kUnsigned:
134 return AddNum(item.u_.unum, 10);
135 case LogItem::kSigned:
136 if (item.u_.snum < 0) {
137 // The cast to uint64_t is intentionally before the negation
138 // so that we do not attempt to negate -2^63.
139 return AddStr("-", 1)
140 && AddNum(- static_cast<uint64_t>(item.u_.snum), 10);
142 return AddNum(static_cast<uint64_t>(item.u_.snum), 10);
145 return AddStr("0x", 2)
146 && AddNum(reinterpret_cast<uintptr_t>(item.u_.ptr), 16);
152 bool Logger::AddStr(const char* str, int n) {
162 bool Logger::AddNum(uint64_t num, int base) {
163 static const char kDigits[] = "0123456789abcdef";
164 char space[22]; // more than enough for 2^64 in smallest supported base (10)
165 char* end = space + sizeof(space);
169 *pos = kDigits[num % base];
171 } while (num > 0 && pos > space);
172 return AddStr(pos, end - pos);
175 } // end tcmalloc namespace
177 void TCMalloc_Printer::printf(const char* format, ...) {
180 va_start(ap, format);
181 const int r = perftools_vsnprintf(buf_, left_, format, ap);
184 // Perhaps an old glibc that returns -1 on truncation?
186 } else if (r > left_) {