diff options
Diffstat (limited to 'third_party/abseil_cpp/absl/base/internal/raw_logging.cc')
| -rw-r--r-- | third_party/abseil_cpp/absl/base/internal/raw_logging.cc | 240 |
1 files changed, 0 insertions, 240 deletions
diff --git a/third_party/abseil_cpp/absl/base/internal/raw_logging.cc b/third_party/abseil_cpp/absl/base/internal/raw_logging.cc deleted file mode 100644 index ae8754c6a132..000000000000 --- a/third_party/abseil_cpp/absl/base/internal/raw_logging.cc +++ /dev/null @@ -1,240 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "absl/base/internal/raw_logging.h" - -#include <stddef.h> -#include <cstdarg> -#include <cstdio> -#include <cstdlib> -#include <cstring> - -#include "absl/base/attributes.h" -#include "absl/base/config.h" -#include "absl/base/internal/atomic_hook.h" -#include "absl/base/log_severity.h" - -// We know how to perform low-level writes to stderr in POSIX and Windows. For -// these platforms, we define the token ABSL_LOW_LEVEL_WRITE_SUPPORTED. -// Much of raw_logging.cc becomes a no-op when we can't output messages, -// although a FATAL ABSL_RAW_LOG message will still abort the process. - -// ABSL_HAVE_POSIX_WRITE is defined when the platform provides posix write() -// (as from unistd.h) -// -// This preprocessor token is also defined in raw_io.cc. If you need to copy -// this, consider moving both to config.h instead. -#if defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__) || \ - defined(__Fuchsia__) || defined(__native_client__) || \ - defined(__EMSCRIPTEN__) || defined(__ASYLO__) - -#include <unistd.h> - -#define ABSL_HAVE_POSIX_WRITE 1 -#define ABSL_LOW_LEVEL_WRITE_SUPPORTED 1 -#else -#undef ABSL_HAVE_POSIX_WRITE -#endif - -// ABSL_HAVE_SYSCALL_WRITE is defined when the platform provides the syscall -// syscall(SYS_write, /*int*/ fd, /*char* */ buf, /*size_t*/ len); -// for low level operations that want to avoid libc. -#if (defined(__linux__) || defined(__FreeBSD__)) && !defined(__ANDROID__) -#include <sys/syscall.h> -#define ABSL_HAVE_SYSCALL_WRITE 1 -#define ABSL_LOW_LEVEL_WRITE_SUPPORTED 1 -#else -#undef ABSL_HAVE_SYSCALL_WRITE -#endif - -#ifdef _WIN32 -#include <io.h> - -#define ABSL_HAVE_RAW_IO 1 -#define ABSL_LOW_LEVEL_WRITE_SUPPORTED 1 -#else -#undef ABSL_HAVE_RAW_IO -#endif - -// TODO(gfalcon): We want raw-logging to work on as many platforms as possible. -// Explicitly #error out when not ABSL_LOW_LEVEL_WRITE_SUPPORTED, except for a -// selected set of platforms for which we expect not to be able to raw log. - -ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES static absl::base_internal::AtomicHook< - absl::raw_logging_internal::LogPrefixHook> - log_prefix_hook; -ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES static absl::base_internal::AtomicHook< - absl::raw_logging_internal::AbortHook> - abort_hook; - -#ifdef ABSL_LOW_LEVEL_WRITE_SUPPORTED -static const char kTruncated[] = " ... (message truncated)\n"; - -// sprintf the format to the buffer, adjusting *buf and *size to reflect the -// consumed bytes, and return whether the message fit without truncation. If -// truncation occurred, if possible leave room in the buffer for the message -// kTruncated[]. -inline static bool VADoRawLog(char** buf, int* size, const char* format, - va_list ap) ABSL_PRINTF_ATTRIBUTE(3, 0); -inline static bool VADoRawLog(char** buf, int* size, - const char* format, va_list ap) { - int n = vsnprintf(*buf, *size, format, ap); - bool result = true; - if (n < 0 || n > *size) { - result = false; - if (static_cast<size_t>(*size) > sizeof(kTruncated)) { - n = *size - sizeof(kTruncated); // room for truncation message - } else { - n = 0; // no room for truncation message - } - } - *size -= n; - *buf += n; - return result; -} -#endif // ABSL_LOW_LEVEL_WRITE_SUPPORTED - -static constexpr int kLogBufSize = 3000; - -namespace { - -// CAVEAT: vsnprintf called from *DoRawLog below has some (exotic) code paths -// that invoke malloc() and getenv() that might acquire some locks. - -// Helper for RawLog below. -// *DoRawLog writes to *buf of *size and move them past the written portion. -// It returns true iff there was no overflow or error. -bool DoRawLog(char** buf, int* size, const char* format, ...) - ABSL_PRINTF_ATTRIBUTE(3, 4); -bool DoRawLog(char** buf, int* size, const char* format, ...) { - va_list ap; - va_start(ap, format); - int n = vsnprintf(*buf, *size, format, ap); - va_end(ap); - if (n < 0 || n > *size) return false; - *size -= n; - *buf += n; - return true; -} - -void RawLogVA(absl::LogSeverity severity, const char* file, int line, - const char* format, va_list ap) ABSL_PRINTF_ATTRIBUTE(4, 0); -void RawLogVA(absl::LogSeverity severity, const char* file, int line, - const char* format, va_list ap) { - char buffer[kLogBufSize]; - char* buf = buffer; - int size = sizeof(buffer); -#ifdef ABSL_LOW_LEVEL_WRITE_SUPPORTED - bool enabled = true; -#else - bool enabled = false; -#endif - -#ifdef ABSL_MIN_LOG_LEVEL - if (severity < static_cast<absl::LogSeverity>(ABSL_MIN_LOG_LEVEL) && - severity < absl::LogSeverity::kFatal) { - enabled = false; - } -#endif - - auto log_prefix_hook_ptr = log_prefix_hook.Load(); - if (log_prefix_hook_ptr) { - enabled = log_prefix_hook_ptr(severity, file, line, &buf, &size); - } else { - if (enabled) { - DoRawLog(&buf, &size, "[%s : %d] RAW: ", file, line); - } - } - const char* const prefix_end = buf; - -#ifdef ABSL_LOW_LEVEL_WRITE_SUPPORTED - if (enabled) { - bool no_chop = VADoRawLog(&buf, &size, format, ap); - if (no_chop) { - DoRawLog(&buf, &size, "\n"); - } else { - DoRawLog(&buf, &size, "%s", kTruncated); - } - absl::raw_logging_internal::SafeWriteToStderr(buffer, strlen(buffer)); - } -#else - static_cast<void>(format); - static_cast<void>(ap); -#endif - - // Abort the process after logging a FATAL message, even if the output itself - // was suppressed. - if (severity == absl::LogSeverity::kFatal) { - abort_hook(file, line, buffer, prefix_end, buffer + kLogBufSize); - abort(); - } -} - -} // namespace - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace raw_logging_internal { -void SafeWriteToStderr(const char *s, size_t len) { -#if defined(ABSL_HAVE_SYSCALL_WRITE) - syscall(SYS_write, STDERR_FILENO, s, len); -#elif defined(ABSL_HAVE_POSIX_WRITE) - write(STDERR_FILENO, s, len); -#elif defined(ABSL_HAVE_RAW_IO) - _write(/* stderr */ 2, s, len); -#else - // stderr logging unsupported on this platform - (void) s; - (void) len; -#endif -} - -void RawLog(absl::LogSeverity severity, const char* file, int line, - const char* format, ...) ABSL_PRINTF_ATTRIBUTE(4, 5); -void RawLog(absl::LogSeverity severity, const char* file, int line, - const char* format, ...) { - va_list ap; - va_start(ap, format); - RawLogVA(severity, file, line, format, ap); - va_end(ap); -} - -// Non-formatting version of RawLog(). -// -// TODO(gfalcon): When string_view no longer depends on base, change this -// interface to take its message as a string_view instead. -static void DefaultInternalLog(absl::LogSeverity severity, const char* file, - int line, const std::string& message) { - RawLog(severity, file, line, "%s", message.c_str()); -} - -bool RawLoggingFullySupported() { -#ifdef ABSL_LOW_LEVEL_WRITE_SUPPORTED - return true; -#else // !ABSL_LOW_LEVEL_WRITE_SUPPORTED - return false; -#endif // !ABSL_LOW_LEVEL_WRITE_SUPPORTED -} - -ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES ABSL_DLL - absl::base_internal::AtomicHook<InternalLogFunction> - internal_log_function(DefaultInternalLog); - -void RegisterInternalLogFunction(InternalLogFunction func) { - internal_log_function.Store(func); -} - -} // namespace raw_logging_internal -ABSL_NAMESPACE_END -} // namespace absl |