Import google-glog's Symbolize() and use it in debug_util_posix.cc.

Unlike glibc's backtrace_symbols(), google-glog's Symbolize() can
resolve symbols in binaries built with -fvisibility=hidden. This is
because Symbolize() uses both dynamic and regular symbols, while
backtrace_symbols() only uses dynamic symbols.

As shown below, the new backtrace is slightly less informative as it
does not have the binary name like out/Debug/base_unittests and the
distance information like +0x20, but it should be ok.

BUG=32762
TEST=out/Debug/base_unittests --gtest_filter='StackTrace*' --gtest_also_run_disabled_tests; and manually:

BEFORE
	out/Debug/base_unittests(StackTrace::StackTrace()+0x20) [0x81d38f6]
	out/Debug/base_unittests(StackTrace_DISABLED_DebugOutputToStream_Test::TestBody()+0x17) [0x806633d]
	out/Debug/base_unittests(testing::Test::Run()+0x7a) [0x8242f96]
	out/Debug/base_unittests(testing::internal::TestInfoImpl::Run()+0xb9) [0x824347b]
	out/Debug/base_unittests(testing::TestCase::Run()+0xb7) [0x8243a7f]
	out/Debug/base_unittests(testing::internal::UnitTestImpl::RunAllTests()+0x256) [0x824777e]
	out/Debug/base_unittests(testing::UnitTest::Run()+0x14) [0x824680a]
	out/Debug/base_unittests [0x8048cc5]
	out/Debug/base_unittests(main+0x50) [0x80482a4]
	/lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe6) [0xb6b41b56]
	out/Debug/base_unittests [0x80481c1]

AFTER
% out/Debug/base_unittests --gtest_filter='*DebugOutputToStream' --gtest_also_run_disabled_tests
	StackTrace::StackTrace() [0x81d3910]
	StackTrace_DISABLED_DebugOutputToStream_Test::TestBody() [0x806633d]
	testing::Test::Run() [0x8242f66]
	testing::internal::TestInfoImpl::Run() [0x824344b]
	testing::TestCase::Run() [0x8243a4f]
	testing::internal::UnitTestImpl::RunAllTests() [0x824774e]
	testing::UnitTest::Run() [0x82467da]
	TestSuite::Run() [0x8048cc5]
	main [0x80482a4]
	0xb6c0db56
	0x80481c1

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=36997

Review URL: http://codereview.chromium.org/545148

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@37090 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 15 insertions, 0 deletions

diff --git a/base/debug_util_unittest.cc b/base/debug_util_unittest.cc
index 1ab32e7..6f4577a 100644
--- a/base/debug_util_unittest.cc
+++ b/base/debug_util_unittest.cc
@@ -91,3 +91,18 @@ TEST(StackTrace, DISABLED_OutputToStream) {
 
 #endif  // define(OS_MACOSX)
 }
+
+// The test is used for manual testing (i.e. see the raw output).
+// To run the test use the flags:
+// --gtest_filter='*DebugOutputToStream' --gtest_also_run_disabled_tests
+TEST(StackTrace, DISABLED_DebugOutputToStream) {
+  StackTrace trace;
+  std::ostringstream os;
+  trace.OutputToStream(&os);
+  LOG(INFO) << os.str();
+}
+
+// The test is used for manual testing. See the comment above.
+TEST(StackTrace, DISABLED_DebugPrintBacktrace) {
+  StackTrace().PrintBacktrace();
+}