| // 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 <stdarg.h> |
| #include <stdlib.h> |
| #include <stdio.h> |
| #ifdef HAVE_UNISTD_H |
| #include <unistd.h> // for write() |
| #endif |
| #include <string.h> // for strlen(), strcmp() |
| #include <assert.h> |
| #include <errno.h> // 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 <sys/syscall.h> |
| #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 <windows.h> |
| 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_ |
