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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <sstream>
#include <string>
#include "base/debug/stack_trace.h"
#include "base/logging.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace base {
namespace debug {
// Note: On Linux, this test currently only fully works on Debug builds.
// See comments in the #ifdef soup if you intend to change this.
#if defined(OS_WIN)
// Always fails on Windows: crbug.com/32070
#define MAYBE_OutputToStream FAILS_OutputToStream
#else
#define MAYBE_OutputToStream OutputToStream
#endif
TEST(StackTrace, MAYBE_OutputToStream) {
StackTrace trace;
// Dump the trace into a string.
std::ostringstream os;
trace.OutputToStream(&os);
std::string backtrace_message = os.str();
#if defined(OS_POSIX) && !defined(OS_MACOSX) && NDEBUG
// Stack traces require an extra data table that bloats our binaries,
// so they're turned off for release builds. We stop the test here,
// at least letting us verify that the calls don't crash.
return;
#endif // defined(OS_POSIX) && !defined(OS_MACOSX) && NDEBUG
size_t frames_found = 0;
trace.Addresses(&frames_found);
ASSERT_GE(frames_found, 5u) <<
"No stack frames found. Skipping rest of test.";
// Check if the output has symbol initialization warning. If it does, fail.
ASSERT_EQ(backtrace_message.find("Dumping unresolved backtrace"),
std::string::npos) <<
"Unable to resolve symbols. Skipping rest of test.";
#if defined(OS_MACOSX)
#if 0
// Disabled due to -fvisibility=hidden in build config.
// Symbol resolution via the backtrace_symbol function does not work well
// in OS X.
// See this thread:
//
// http://lists.apple.com/archives/darwin-dev/2009/Mar/msg00111.html
//
// Just check instead that we find our way back to the "start" symbol
// which should be the first symbol in the trace.
//
// TODO(port): Find a more reliable way to resolve symbols.
// Expect to at least find main.
EXPECT_TRUE(backtrace_message.find("start") != std::string::npos)
<< "Expected to find start in backtrace:\n"
<< backtrace_message;
#endif
#elif defined(__GLIBCXX__)
// This branch is for gcc-compiled code, but not Mac due to the
// above #if.
// Expect a demangled symbol.
EXPECT_TRUE(backtrace_message.find("testing::Test::Run()") !=
std::string::npos)
<< "Expected a demangled symbol in backtrace:\n"
<< backtrace_message;
#elif 0
// This is the fall-through case; it used to cover Windows.
// But it's disabled because of varying buildbot configs;
// some lack symbols.
// Expect to at least find main.
EXPECT_TRUE(backtrace_message.find("main") != std::string::npos)
<< "Expected to find main in backtrace:\n"
<< backtrace_message;
#if defined(OS_WIN)
// MSVC doesn't allow the use of C99's __func__ within C++, so we fake it with
// MSVC's __FUNCTION__ macro.
#define __func__ __FUNCTION__
#endif
// Expect to find this function as well.
// Note: This will fail if not linked with -rdynamic (aka -export_dynamic)
EXPECT_TRUE(backtrace_message.find(__func__) != std::string::npos)
<< "Expected to find " << __func__ << " in backtrace:\n"
<< backtrace_message;
#endif // define(OS_MACOSX)
}
// The test is used for manual testing, e.g., to see the raw output.
TEST(StackTrace, DebugOutputToStream) {
StackTrace trace;
std::ostringstream os;
trace.OutputToStream(&os);
VLOG(1) << os.str();
}
// The test is used for manual testing, e.g., to see the raw output.
TEST(StackTrace, DebugPrintBacktrace) {
StackTrace().PrintBacktrace();
}
} // namespace debug
} // namespace base
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