| // Copyright 2011 Google Inc. All Rights Reserved. |
| // Author: enh@google.com (Elliott Hughes) |
| |
| #include "logging.h" |
| |
| #include "scoped_ptr.h" |
| #include "stringprintf.h" |
| |
| #include <cstdio> |
| #include <cstring> |
| #include <execinfo.h> |
| #include <iostream> |
| #include <sys/types.h> |
| #include <unistd.h> |
| |
| // glibc doesn't expose gettid(2). |
| #define __KERNEL__ |
| # include <linux/unistd.h> |
| #ifdef _syscall0 |
| _syscall0(pid_t,gettid) |
| #else |
| pid_t gettid() { return syscall(__NR_gettid);} |
| #endif |
| #undef __KERNEL__ |
| |
| static void dumpStackTrace(std::ostream& os) { |
| // Get the raw stack frames. |
| size_t MAX_STACK_FRAMES = 64; |
| void* stack_frames[MAX_STACK_FRAMES]; |
| size_t frame_count = backtrace(stack_frames, MAX_STACK_FRAMES); |
| |
| // Turn them into something human-readable with symbols. |
| // TODO: in practice, we may find that we should use backtrace_symbols_fd |
| // to avoid allocation, rather than use our own custom formatting. |
| art::scoped_ptr_malloc<char*> strings(backtrace_symbols(stack_frames, frame_count)); |
| if (strings.get() == NULL) { |
| os << "backtrace_symbols failed: " << strerror(errno) << std::endl; |
| return; |
| } |
| |
| for (size_t i = 0; i < frame_count; ++i) { |
| os << StringPrintf("\t#%02d %s", i, strings.get()[i]) << std::endl; |
| } |
| } |
| |
| LogMessage::LogMessage(const char* file, int line, LogSeverity severity, int error) |
| : severity_(severity), errno_(error) |
| { |
| const char* last_slash = strrchr(file, '/'); |
| const char* leaf = (last_slash == NULL) ? file : last_slash + 1; |
| stream() << StringPrintf("%c %5d %5d %s:%d] ", |
| "IWEF"[severity], getpid(), gettid(), leaf, line); |
| } |
| |
| LogMessage::~LogMessage() { |
| if (errno_ != -1) { |
| stream() << ": " << strerror(errno); |
| } |
| stream() << std::endl; |
| if (severity_ == FATAL) { |
| stream() << "Aborting:" << std::endl; |
| dumpStackTrace(stream()); |
| abort(); |
| } |
| } |
| |
| std::ostream& LogMessage::stream() { |
| return std::cerr; |
| } |