// -*- 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. // --- // This file contains #include information about logging-related stuff. // Pretty much everybody needs to #include this file so that they can // log various happenings. // #ifndef _LOGGING_H_ #define _LOGGING_H_ #include "../config.h" #include #include #include #ifdef HAVE_UNISTD_H #include // for write() #endif #include // for strlen(), strcmp() #include #include // for errno #include "base/commandlineflags.h" // On some systems (like freebsd), we can't call write() at all in a // global constructor, perhaps because errno hasn't been set up. // (In windows, we can't call it because it might call malloc.) // Calling the write syscall is safer (it doesn't set errno), so we // prefer that. Note we don't care about errno for logging: we just // do logging on a best-effort basis. #if defined(_MSC_VER) #define WRITE_TO_STDERR(buf, len) WriteToStderr(buf, len); // in port.cc #elif defined(HAVE_SYS_SYSCALL_H) #include #define WRITE_TO_STDERR(buf, len) syscall(SYS_write, STDERR_FILENO, buf, len) #else #define WRITE_TO_STDERR(buf, len) write(STDERR_FILENO, buf, len) #endif // MSVC and mingw define their own, safe version of vnsprintf (the // windows one in broken) in port.cc. Everyone else can use the // version here. We had to give it a unique name for windows. #ifndef _WIN32 # define perftools_vsnprintf vsnprintf #endif // We log all messages at this log-level and below. // INFO == -1, WARNING == -2, ERROR == -3, FATAL == -4 DECLARE_int32(verbose); // CHECK dies with a fatal error if condition is not true. It is *not* // controlled by NDEBUG, so the check will be executed regardless of // compilation mode. Therefore, it is safe to do things like: // CHECK(fp->Write(x) == 4) // Note we use write instead of printf/puts to avoid the risk we'll // call malloc(). #define CHECK(condition) \ do { \ if (!(condition)) { \ WRITE_TO_STDERR("Check failed: " #condition "\n", \ sizeof("Check failed: " #condition "\n")-1); \ abort(); \ } \ } while (0) // This takes a message to print. The name is historical. #define RAW_CHECK(condition, message) \ do { \ if (!(condition)) { \ WRITE_TO_STDERR("Check failed: " #condition ": " message "\n", \ sizeof("Check failed: " #condition ": " message "\n")-1);\ abort(); \ } \ } while (0) // This is like RAW_CHECK, but only in debug-mode #ifdef NDEBUG enum { DEBUG_MODE = 0 }; #define RAW_DCHECK(condition, message) #else enum { DEBUG_MODE = 1 }; #define RAW_DCHECK(condition, message) RAW_CHECK(condition, message) #endif // This prints errno as well. Note we use write instead of printf/puts to // avoid the risk we'll call malloc(). #define PCHECK(condition) \ do { \ if (!(condition)) { \ const int err_no = errno; \ WRITE_TO_STDERR("Check failed: " #condition ": ", \ sizeof("Check failed: " #condition ": ")-1); \ WRITE_TO_STDERR(strerror(err_no), strlen(strerror(err_no))); \ WRITE_TO_STDERR("\n", sizeof("\n")-1); \ abort(); \ } \ } while (0) // Helper macro for binary operators; prints the two values on error // Don't use this macro directly in your code, use CHECK_EQ et al below // WARNING: These don't compile correctly if one of the arguments is a pointer // and the other is NULL. To work around this, simply static_cast NULL to the // type of the desired pointer. // TODO(jandrews): Also print the values in case of failure. Requires some // sort of type-sensitive ToString() function. #define CHECK_OP(op, val1, val2) \ do { \ if (!((val1) op (val2))) { \ fprintf(stderr, "Check failed: %s %s %s\n", #val1, #op, #val2); \ abort(); \ } \ } while (0) #define CHECK_EQ(val1, val2) CHECK_OP(==, val1, val2) #define CHECK_NE(val1, val2) CHECK_OP(!=, val1, val2) #define CHECK_LE(val1, val2) CHECK_OP(<=, val1, val2) #define CHECK_LT(val1, val2) CHECK_OP(< , val1, val2) #define CHECK_GE(val1, val2) CHECK_OP(>=, val1, val2) #define CHECK_GT(val1, val2) CHECK_OP(> , val1, val2) // Synonyms for CHECK_* that are used in some unittests. #define EXPECT_EQ(val1, val2) CHECK_EQ(val1, val2) #define EXPECT_NE(val1, val2) CHECK_NE(val1, val2) #define EXPECT_LE(val1, val2) CHECK_LE(val1, val2) #define EXPECT_LT(val1, val2) CHECK_LT(val1, val2) #define EXPECT_GE(val1, val2) CHECK_GE(val1, val2) #define EXPECT_GT(val1, val2) CHECK_GT(val1, val2) #define ASSERT_EQ(val1, val2) EXPECT_EQ(val1, val2) #define ASSERT_NE(val1, val2) EXPECT_NE(val1, val2) #define ASSERT_LE(val1, val2) EXPECT_LE(val1, val2) #define ASSERT_LT(val1, val2) EXPECT_LT(val1, val2) #define ASSERT_GE(val1, val2) EXPECT_GE(val1, val2) #define ASSERT_GT(val1, val2) EXPECT_GT(val1, val2) // As are these variants. #define EXPECT_TRUE(cond) CHECK(cond) #define EXPECT_FALSE(cond) CHECK(!(cond)) #define EXPECT_STREQ(a, b) CHECK(strcmp(a, b) == 0) #define ASSERT_TRUE(cond) EXPECT_TRUE(cond) #define ASSERT_FALSE(cond) EXPECT_FALSE(cond) #define ASSERT_STREQ(a, b) EXPECT_STREQ(a, b) // Used for (libc) functions that return -1 and set errno #define CHECK_ERR(invocation) PCHECK((invocation) != -1) // A few more checks that only happen in debug mode #ifdef NDEBUG #define DCHECK_EQ(val1, val2) #define DCHECK_NE(val1, val2) #define DCHECK_LE(val1, val2) #define DCHECK_LT(val1, val2) #define DCHECK_GE(val1, val2) #define DCHECK_GT(val1, val2) #else #define DCHECK_EQ(val1, val2) CHECK_EQ(val1, val2) #define DCHECK_NE(val1, val2) CHECK_NE(val1, val2) #define DCHECK_LE(val1, val2) CHECK_LE(val1, val2) #define DCHECK_LT(val1, val2) CHECK_LT(val1, val2) #define DCHECK_GE(val1, val2) CHECK_GE(val1, val2) #define DCHECK_GT(val1, val2) CHECK_GT(val1, val2) #endif #ifdef ERROR #undef ERROR // may conflict with ERROR macro on windows #endif enum LogSeverity {INFO = -1, WARNING = -2, ERROR = -3, FATAL = -4}; // NOTE: we add a newline to the end of the output if it's not there already inline void LogPrintf(int severity, const char* pat, va_list ap) { // We write directly to the stderr file descriptor and avoid FILE // buffering because that may invoke malloc() char buf[600]; perftools_vsnprintf(buf, sizeof(buf)-1, pat, ap); if (buf[0] != '\0' && buf[strlen(buf)-1] != '\n') { assert(strlen(buf)+1 < sizeof(buf)); strcat(buf, "\n"); } WRITE_TO_STDERR(buf, strlen(buf)); if ((severity) == FATAL) abort(); // LOG(FATAL) indicates a big problem, so don't run atexit() calls } // Note that since the order of global constructors is unspecified, // global code that calls RAW_LOG may execute before FLAGS_verbose is set. // Such code will run with verbosity == 0 no matter what. #define VLOG_IS_ON(severity) (FLAGS_verbose >= severity) // In a better world, we'd use __VA_ARGS__, but VC++ 7 doesn't support it. #define LOG_PRINTF(severity, pat) do { \ if (VLOG_IS_ON(severity)) { \ va_list ap; \ va_start(ap, pat); \ LogPrintf(severity, pat, ap); \ va_end(ap); \ } \ } while (0) // RAW_LOG is the main function; some synonyms are used in unittests. inline void RAW_LOG(int lvl, const char* pat, ...) { LOG_PRINTF(lvl, pat); } inline void RAW_VLOG(int lvl, const char* pat, ...) { LOG_PRINTF(lvl, pat); } inline void LOG(int lvl, const char* pat, ...) { LOG_PRINTF(lvl, pat); } inline void VLOG(int lvl, const char* pat, ...) { LOG_PRINTF(lvl, pat); } inline void LOG_IF(int lvl, bool cond, const char* pat, ...) { if (cond) LOG_PRINTF(lvl, pat); } // This isn't technically logging, but it's also IO and also is an // attempt to be "raw" -- that is, to not use any higher-level libc // routines that might allocate memory or (ideally) try to allocate // locks. We use an opaque file handle (not necessarily an int) // to allow even more low-level stuff in the future. // Like other "raw" routines, these functions are best effort, and // thus don't return error codes (except RawOpenForWriting()). #if defined(_WIN32) || defined(__CYGWIN__) || defined(__CYGWIN32__) #ifndef NOMINMAX #define NOMINMAX // @#!$& windows #endif #include typedef HANDLE RawFD; const RawFD kIllegalRawFD = INVALID_HANDLE_VALUE; #else typedef int RawFD; const RawFD kIllegalRawFD = -1; // what open returns if it fails #endif // defined(_WIN32) || defined(__CYGWIN__) || defined(__CYGWIN32__) RawFD RawOpenForWriting(const char* filename); // uses default permissions void RawWrite(RawFD fd, const char* buf, size_t len); void RawClose(RawFD fd); #endif // _LOGGING_H_