logging_linux.cc revision eb4f614f2eb53b92ebd416fa418f550861655887
1eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes// Copyright 2011 Google Inc. All Rights Reserved. 2eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes// Author: enh@google.com (Elliott Hughes) 3eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes 4eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes#include "logging.h" 5eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes 6eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes#include "scoped_ptr.h" 7eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes#include "stringprintf.h" 8eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes 9eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes#include <cstdio> 10eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes#include <cstring> 11eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes#include <execinfo.h> 12eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes#include <iostream> 13eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes#include <sys/types.h> 14eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes#include <unistd.h> 15eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes 16eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes// glibc doesn't expose gettid(2). 17eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes#define __KERNEL__ 18eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes# include <linux/unistd.h> 19eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes#ifdef _syscall0 20eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes_syscall0(pid_t,gettid) 21eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes#else 22eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughespid_t gettid() { return syscall(__NR_gettid);} 23eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes#endif 24eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes#undef __KERNEL__ 25eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes 26eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughesstatic void dumpStackTrace(std::ostream& os) { 27eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes // Get the raw stack frames. 28eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes size_t MAX_STACK_FRAMES = 64; 29eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes void* stack_frames[MAX_STACK_FRAMES]; 30eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes size_t frame_count = backtrace(stack_frames, MAX_STACK_FRAMES); 31eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes 32eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes // Turn them into something human-readable with symbols. 33eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes // TODO: in practice, we may find that we should use backtrace_symbols_fd 34eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes // to avoid allocation, rather than use our own custom formatting. 35eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes art::scoped_ptr_malloc<char*> strings(backtrace_symbols(stack_frames, frame_count)); 36eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes if (strings.get() == NULL) { 37eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes os << "backtrace_symbols failed: " << strerror(errno) << std::endl; 38eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes return; 39eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes } 40eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes 41eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes for (size_t i = 0; i < frame_count; ++i) { 42eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes os << StringPrintf("\t#%02d %s", i, strings.get()[i]) << std::endl; 43eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes } 44eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes} 45eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes 46eb4f614f2eb53b92ebd416fa418f550861655887Elliott HughesLogMessage::LogMessage(const char* file, int line, LogSeverity severity, int error) 47eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes: severity_(severity), errno_(error) 48eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes{ 49eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes const char* last_slash = strrchr(file, '/'); 50eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes const char* leaf = (last_slash == NULL) ? file : last_slash + 1; 51eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes stream() << StringPrintf("%c %5d %5d %s:%d] ", 52eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes "IWEF"[severity], getpid(), gettid(), leaf, line); 53eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes} 54eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes 55eb4f614f2eb53b92ebd416fa418f550861655887Elliott HughesLogMessage::~LogMessage() { 56eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes if (errno_ != -1) { 57eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes stream() << ": " << strerror(errno); 58eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes } 59eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes stream() << std::endl; 60eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes if (severity_ == FATAL) { 61eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes stream() << "Aborting:" << std::endl; 62eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes dumpStackTrace(stream()); 63eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes abort(); 64eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes } 65eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes} 66eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes 67eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughesstd::ostream& LogMessage::stream() { 68eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes return std::cerr; 69eb4f614f2eb53b92ebd416fa418f550861655887Elliott Hughes} 70