Squashed 'third_party/gperftools/' content from commit 54505f1
Change-Id: Id02e833828732b0efe7dac722b8485279e67c5fa
git-subtree-dir: third_party/gperftools
git-subtree-split: 54505f1d50c2d1f4676f5e87090b64a117fd980e
diff --git a/src/internal_logging.cc b/src/internal_logging.cc
new file mode 100644
index 0000000..4e7fc87
--- /dev/null
+++ b/src/internal_logging.cc
@@ -0,0 +1,194 @@
+// -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*-
+// Copyright (c) 2005, 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.
+
+// ---
+// Sanjay Ghemawat <opensource@google.com>
+
+#include <config.h>
+#include "internal_logging.h"
+#include <stdarg.h> // for va_end, va_start
+#include <stdio.h> // for vsnprintf, va_list, etc
+#include <stdlib.h> // for abort
+#include <string.h> // for strlen, memcpy
+#ifdef HAVE_UNISTD_H
+#include <unistd.h> // for write()
+#endif
+
+#include <gperftools/malloc_extension.h>
+#include "base/logging.h" // for perftools_vsnprintf
+#include "base/spinlock.h" // for SpinLockHolder, SpinLock
+
+static const int kLogBufSize = 800;
+
+// Variables for storing crash output. Allocated statically since we
+// may not be able to heap-allocate while crashing.
+static SpinLock crash_lock(base::LINKER_INITIALIZED);
+static bool crashed = false;
+static const int kStatsBufferSize = 16 << 10;
+static char stats_buffer[kStatsBufferSize] = { 0 };
+
+namespace tcmalloc {
+
+static void WriteMessage(const char* msg, int length) {
+ write(STDERR_FILENO, msg, length);
+}
+
+void (*log_message_writer)(const char* msg, int length) = WriteMessage;
+
+
+class Logger {
+ public:
+ bool Add(const LogItem& item);
+ bool AddStr(const char* str, int n);
+ bool AddNum(uint64_t num, int base); // base must be 10 or 16.
+
+ static const int kBufSize = 200;
+ char* p_;
+ char* end_;
+ char buf_[kBufSize];
+};
+
+void Log(LogMode mode, const char* filename, int line,
+ LogItem a, LogItem b, LogItem c, LogItem d) {
+ Logger state;
+ state.p_ = state.buf_;
+ state.end_ = state.buf_ + sizeof(state.buf_);
+ state.AddStr(filename, strlen(filename))
+ && state.AddStr(":", 1)
+ && state.AddNum(line, 10)
+ && state.AddStr("]", 1)
+ && state.Add(a)
+ && state.Add(b)
+ && state.Add(c)
+ && state.Add(d);
+
+ // Teminate with newline
+ if (state.p_ >= state.end_) {
+ state.p_ = state.end_ - 1;
+ }
+ *state.p_ = '\n';
+ state.p_++;
+
+ int msglen = state.p_ - state.buf_;
+ if (mode == kLog) {
+ (*log_message_writer)(state.buf_, msglen);
+ return;
+ }
+
+ bool first_crash = false;
+ {
+ SpinLockHolder l(&crash_lock);
+ if (!crashed) {
+ crashed = true;
+ first_crash = true;
+ }
+ }
+
+ (*log_message_writer)(state.buf_, msglen);
+ if (first_crash && mode == kCrashWithStats) {
+ MallocExtension::instance()->GetStats(stats_buffer, kStatsBufferSize);
+ (*log_message_writer)(stats_buffer, strlen(stats_buffer));
+ }
+
+ abort();
+}
+
+bool Logger::Add(const LogItem& item) {
+ // Separate items with spaces
+ if (p_ < end_) {
+ *p_ = ' ';
+ p_++;
+ }
+
+ switch (item.tag_) {
+ case LogItem::kStr:
+ return AddStr(item.u_.str, strlen(item.u_.str));
+ case LogItem::kUnsigned:
+ return AddNum(item.u_.unum, 10);
+ case LogItem::kSigned:
+ if (item.u_.snum < 0) {
+ // The cast to uint64_t is intentionally before the negation
+ // so that we do not attempt to negate -2^63.
+ return AddStr("-", 1)
+ && AddNum(- static_cast<uint64_t>(item.u_.snum), 10);
+ } else {
+ return AddNum(static_cast<uint64_t>(item.u_.snum), 10);
+ }
+ case LogItem::kPtr:
+ return AddStr("0x", 2)
+ && AddNum(reinterpret_cast<uintptr_t>(item.u_.ptr), 16);
+ default:
+ return false;
+ }
+}
+
+bool Logger::AddStr(const char* str, int n) {
+ if (end_ - p_ < n) {
+ return false;
+ } else {
+ memcpy(p_, str, n);
+ p_ += n;
+ return true;
+ }
+}
+
+bool Logger::AddNum(uint64_t num, int base) {
+ static const char kDigits[] = "0123456789abcdef";
+ char space[22]; // more than enough for 2^64 in smallest supported base (10)
+ char* end = space + sizeof(space);
+ char* pos = end;
+ do {
+ pos--;
+ *pos = kDigits[num % base];
+ num /= base;
+ } while (num > 0 && pos > space);
+ return AddStr(pos, end - pos);
+}
+
+} // end tcmalloc namespace
+
+void TCMalloc_Printer::printf(const char* format, ...) {
+ if (left_ > 0) {
+ va_list ap;
+ va_start(ap, format);
+ const int r = perftools_vsnprintf(buf_, left_, format, ap);
+ va_end(ap);
+ if (r < 0) {
+ // Perhaps an old glibc that returns -1 on truncation?
+ left_ = 0;
+ } else if (r > left_) {
+ // Truncation
+ left_ = 0;
+ } else {
+ left_ -= r;
+ buf_ += r;
+ }
+ }
+}