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.h b/src/internal_logging.h
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+// -*- 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.
+
+// ---
+// Author: Sanjay Ghemawat <opensource@google.com>
+//
+// Internal logging and related utility routines.
+
+#ifndef TCMALLOC_INTERNAL_LOGGING_H_
+#define TCMALLOC_INTERNAL_LOGGING_H_
+
+#include <config.h>
+#include <stddef.h> // for size_t
+#if defined HAVE_STDINT_H
+#include <stdint.h>
+#elif defined HAVE_INTTYPES_H
+#include <inttypes.h>
+#else
+#include <sys/types.h>
+#endif
+
+//-------------------------------------------------------------------
+// Utility routines
+//-------------------------------------------------------------------
+
+// Safe logging helper: we write directly to the stderr file
+// descriptor and avoid FILE buffering because that may invoke
+// malloc().
+//
+// Example:
+// Log(kLog, __FILE__, __LINE__, "error", bytes);
+
+namespace tcmalloc {
+enum LogMode {
+ kLog, // Just print the message
+ kCrash, // Print the message and crash
+ kCrashWithStats // Print the message, some stats, and crash
+};
+
+class Logger;
+
+// A LogItem holds any of the argument types that can be passed to Log()
+class LogItem {
+ public:
+ LogItem() : tag_(kEnd) { }
+ LogItem(const char* v) : tag_(kStr) { u_.str = v; }
+ LogItem(int v) : tag_(kSigned) { u_.snum = v; }
+ LogItem(long v) : tag_(kSigned) { u_.snum = v; }
+ LogItem(long long v) : tag_(kSigned) { u_.snum = v; }
+ LogItem(unsigned int v) : tag_(kUnsigned) { u_.unum = v; }
+ LogItem(unsigned long v) : tag_(kUnsigned) { u_.unum = v; }
+ LogItem(unsigned long long v) : tag_(kUnsigned) { u_.unum = v; }
+ LogItem(const void* v) : tag_(kPtr) { u_.ptr = v; }
+ private:
+ friend class Logger;
+ enum Tag {
+ kStr,
+ kSigned,
+ kUnsigned,
+ kPtr,
+ kEnd
+ };
+ Tag tag_;
+ union {
+ const char* str;
+ const void* ptr;
+ int64_t snum;
+ uint64_t unum;
+ } u_;
+};
+
+extern PERFTOOLS_DLL_DECL void Log(LogMode mode, const char* filename, int line,
+ LogItem a, LogItem b = LogItem(),
+ LogItem c = LogItem(), LogItem d = LogItem());
+
+// Tests can override this function to collect logging messages.
+extern PERFTOOLS_DLL_DECL void (*log_message_writer)(const char* msg, int length);
+
+} // end tcmalloc namespace
+
+// Like assert(), but executed even in NDEBUG mode
+#undef CHECK_CONDITION
+#define CHECK_CONDITION(cond) \
+do { \
+ if (!(cond)) { \
+ ::tcmalloc::Log(::tcmalloc::kCrash, __FILE__, __LINE__, #cond); \
+ } \
+} while (0)
+
+// Our own version of assert() so we can avoid hanging by trying to do
+// all kinds of goofy printing while holding the malloc lock.
+#ifndef NDEBUG
+#define ASSERT(cond) CHECK_CONDITION(cond)
+#else
+#define ASSERT(cond) ((void) 0)
+#endif
+
+// Print into buffer
+class TCMalloc_Printer {
+ private:
+ char* buf_; // Where should we write next
+ int left_; // Space left in buffer (including space for \0)
+
+ public:
+ // REQUIRES: "length > 0"
+ TCMalloc_Printer(char* buf, int length) : buf_(buf), left_(length) {
+ buf[0] = '\0';
+ }
+
+ void printf(const char* format, ...)
+#ifdef HAVE___ATTRIBUTE__
+ __attribute__ ((__format__ (__printf__, 2, 3)))
+#endif
+;
+};
+
+#endif // TCMALLOC_INTERNAL_LOGGING_H_