Flesh out the logging implementation.
Add PLOG and ensure we have CHECK_STREQ and CHECK_STRNE to go with
the existing non-functional DCHECK_STREQ and DCHECK_STRNE.
This also gives us two different logging implementations, one for
the host that just uses std::cerr, and one for Android that uses
the Android log.
Also bring in the StringPrintf family.
Change-Id: I8e190c2c58f26b22ee76a2a87d447df6eb0fa73b
diff --git a/src/logging_linux.cc b/src/logging_linux.cc
new file mode 100644
index 0000000..9feceea
--- /dev/null
+++ b/src/logging_linux.cc
@@ -0,0 +1,69 @@
+// 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;
+}