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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 <atlbase.h>
#include "base/environment.h"
#include "base/scoped_ptr.h"
#include "base/utf_string_conversions.h"
#include "chrome_frame/crash_reporting/crash_dll.h"
#include "chrome_frame/crash_reporting/nt_loader.h"
#include "chrome_frame/crash_reporting/vectored_handler-impl.h"
#include "chrome_frame/crash_reporting/veh_test.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
using testing::_;
ACTION_P(StackTraceDump, s) {
memcpy(arg2, s->stack_, s->count_ * sizeof(s->stack_[0]));
return s->count_;
}
namespace {
class MockApi : public Win32VEHTraits, public ModuleOfInterest {
public:
MockApi() {}
MOCK_METHOD1(WriteDump, void(const EXCEPTION_POINTERS*));
MOCK_METHOD0(RtlpGetExceptionList, const EXCEPTION_REGISTRATION_RECORD*());
MOCK_METHOD4(RtlCaptureStackBackTrace, WORD(DWORD FramesToSkip,
DWORD FramesToCapture, void** BackTrace, DWORD* BackTraceHash));
// Helpers
void SetSEH(const SEHChain& sehchain) {
EXPECT_CALL(*this, RtlpGetExceptionList())
.Times(testing::AnyNumber())
.WillRepeatedly(testing::Return(sehchain.chain_));
}
void SetStack(const StackHelper& s) {
EXPECT_CALL(*this, RtlCaptureStackBackTrace(_, _, _, _))
.Times(testing::AnyNumber())
.WillRepeatedly(StackTraceDump(&s));
}
enum {max_back_trace = 15};
};
}; // namespace
typedef VectoredHandlerT<MockApi> VectoredHandlerMock;
static VectoredHandlerMock* g_mock_veh = NULL;
static LONG WINAPI VEH(EXCEPTION_POINTERS* exptrs) {
return g_mock_veh->Handler(exptrs);
}
TEST(ChromeFrame, ExceptionReport) {
MockApi api;
VectoredHandlerMock veh(&api);
// Start address of our module.
char* s = reinterpret_cast<char*>(&__ImageBase);
char *e = s + 0x10000;
api.SetModule(s, e);
SEHChain have_seh(s - 0x1000, s + 0x1000, e + 0x7127, NULL);
SEHChain no_seh(s - 0x1000, e + 0x7127, NULL);
StackHelper on_stack(s - 0x11283, s - 0x278361, s + 0x9171, e + 1231, NULL);
StackHelper not_on_stack(s - 0x11283, s - 0x278361, e + 1231, NULL);
char* our_code = s + 0x1111;
char* not_our_code = s - 0x5555;
char* not_our_code2 = e + 0x5555;
// Exception in our code, but we have SEH filter => no dump.
api.SetSEH(have_seh);
api.SetStack(on_stack);
EXPECT_CALL(api, WriteDump(_)).Times(0);
EXPECT_EQ(ExceptionContinueSearch,
veh.Handler(&ExceptionInfo(STATUS_ACCESS_VIOLATION, our_code)));
testing::Mock::VerifyAndClearExpectations(&api);
// RPC_E_DISCONNECTED (0x80010108) is "The object invoked has disconnected
// from its clients", shall not be caught since it's a warning only.
EXPECT_CALL(api, WriteDump(_)).Times(0);
EXPECT_CALL(api, RtlpGetExceptionList()).Times(0);
EXPECT_EQ(ExceptionContinueSearch,
veh.Handler(&ExceptionInfo(RPC_E_DISCONNECTED, our_code)));
testing::Mock::VerifyAndClearExpectations(&api);
// Exception, not in our code, we do not have SEH and we are not in stack.
api.SetSEH(no_seh);
api.SetStack(not_on_stack);
EXPECT_CALL(api, WriteDump(_)).Times(0);
EXPECT_EQ(ExceptionContinueSearch,
veh.Handler(&ExceptionInfo(STATUS_INTEGER_DIVIDE_BY_ZERO, not_our_code)));
testing::Mock::VerifyAndClearExpectations(&api);
// Exception, not in our code, no SEH, but we are on the stack.
api.SetSEH(no_seh);
api.SetStack(on_stack);
EXPECT_CALL(api, WriteDump(_)).Times(1);
EXPECT_EQ(ExceptionContinueSearch,
veh.Handler(&ExceptionInfo(STATUS_INTEGER_DIVIDE_BY_ZERO,
not_our_code2)));
testing::Mock::VerifyAndClearExpectations(&api);
// Exception, in our code, no SEH, not on stack (assume FPO screwed us)
api.SetSEH(no_seh);
api.SetStack(not_on_stack);
EXPECT_CALL(api, WriteDump(_)).Times(1);
EXPECT_EQ(ExceptionContinueSearch,
veh.Handler(&ExceptionInfo(STATUS_PRIVILEGED_INSTRUCTION, our_code)));
testing::Mock::VerifyAndClearExpectations(&api);
// Exception, in IsBadStringPtrA, we are on the stack.
char* is_bad_ptr = reinterpret_cast<char*>(GetProcAddress(
GetModuleHandleA("kernel32.dll"), "IsBadStringPtrA"));
SEHChain kernel32_seh(is_bad_ptr, is_bad_ptr + 0x100, NULL);
api.SetSEH(kernel32_seh);
api.SetStack(on_stack);
EXPECT_CALL(api, WriteDump(_)).Times(0);
EXPECT_EQ(ExceptionContinueSearch,
veh.Handler(&ExceptionInfo(STATUS_ACCESS_VIOLATION, is_bad_ptr)));
testing::Mock::VerifyAndClearExpectations(&api);
// Exception, in IsBadStringPtrA, we are not on the stack.
api.SetSEH(kernel32_seh);
api.SetStack(not_on_stack);
EXPECT_CALL(api, WriteDump(_)).Times(0);
EXPECT_EQ(ExceptionContinueSearch,
veh.Handler(&ExceptionInfo(STATUS_ACCESS_VIOLATION, is_bad_ptr)));
testing::Mock::VerifyAndClearExpectations(&api);
// Exception in a loading module, we are on the stack.
// Make sure we don't report it.
api.SetSEH(no_seh);
api.SetStack(on_stack);
EXPECT_CALL(api, WriteDump(_)).Times(0);
g_mock_veh = &veh;
void* id = ::AddVectoredExceptionHandler(FALSE, VEH);
scoped_ptr<base::Environment> env(base::Environment::Create());
EXPECT_TRUE(env->SetVar(WideToUTF8(kCrashOnLoadMode).c_str(), "1"));
long exceptions_seen = veh.get_exceptions_seen();
HMODULE module = ::LoadLibrary(kCrashDllName);
EXPECT_EQ(NULL, module);
testing::Mock::VerifyAndClearExpectations(&api);
EXPECT_EQ(exceptions_seen + 1, veh.get_exceptions_seen());
EXPECT_TRUE(env->UnSetVar(WideToUTF8(kCrashOnLoadMode).c_str()));
// Exception in an unloading module, we are on the stack/
// Make sure we report it.
EXPECT_TRUE(env->SetVar(WideToUTF8(kCrashOnUnloadMode).c_str(), "1"));
module = ::LoadLibrary(kCrashDllName);
api.SetSEH(no_seh);
api.SetStack(on_stack);
EXPECT_CALL(api, WriteDump(_)).Times(1);
EXPECT_TRUE(module != NULL);
exceptions_seen = veh.get_exceptions_seen();
// Crash on unloading.
::FreeLibrary(module);
EXPECT_EQ(exceptions_seen + 1, veh.get_exceptions_seen());
testing::Mock::VerifyAndClearExpectations(&api);
::RemoveVectoredExceptionHandler(id);
g_mock_veh = NULL;
}
MATCHER_P(ExceptionCodeIs, code, "") {
return (arg->ExceptionRecord->ExceptionCode == code);
}
DECLSPEC_NOINLINE static void OverflowStack() {
char tmp[1024 * 2048] = {0};
GetSystemInfo(reinterpret_cast<SYSTEM_INFO*>(&tmp));
}
DWORD WINAPI CrashingThread(PVOID tmp) {
__try {
OverflowStack();
} __except(EXCEPTION_EXECUTE_HANDLER) {
}
// This will cause STATUS_ACCESS_VIOLATION
__try {
OverflowStack();
} __except(EXCEPTION_EXECUTE_HANDLER) {
}
return 0;
}
TEST(ChromeFrame, TrickyStackOverflow) {
MockApi api;
VectoredHandlerMock veh(&api);
// Start address of our module.
char* s = reinterpret_cast<char*>(0x30000000);
char *e = s + 0x10000;
api.SetModule(s, e);
SEHChain no_seh(s - 0x1000, e + 0x7127, NULL);
StackHelper on_stack(s - 0x11283, s - 0x278361, s + 0x9171, e + 1231, NULL);
api.SetSEH(no_seh);
api.SetStack(on_stack);
EXPECT_CALL(api, WriteDump(ExceptionCodeIs(STATUS_STACK_OVERFLOW))).Times(1);
g_mock_veh = &veh;
void* id = ::AddVectoredExceptionHandler(FALSE, VEH);
DWORD tid;
HANDLE h = ::CreateThread(0, 0, CrashingThread, 0, 0, &tid);
::WaitForSingleObject(h, INFINITE);
::CloseHandle(h);
EXPECT_EQ(2, veh.get_exceptions_seen());
::RemoveVectoredExceptionHandler(id);
g_mock_veh = NULL;
}
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