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Diffstat (limited to 'src/third_party/gperftools-2.0/src/internal_logging.h')
| -rw-r--r-- | src/third_party/gperftools-2.0/src/internal_logging.h | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/src/third_party/gperftools-2.0/src/internal_logging.h b/src/third_party/gperftools-2.0/src/internal_logging.h new file mode 100644 index 00000000000..02670346cbd --- /dev/null +++ b/src/third_party/gperftools-2.0/src/internal_logging.h @@ -0,0 +1,143 @@ +// 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_ |