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94a5a72efa
Crashpad has many tests that crash intentionally. Some of these are
gtest death tests, and others arrange for intentional crashes to test
Crashpad’s own crash-catching logic. On macOS, all of the gtest death
tests and some of the other intentional crashes were being logged by
ReportCrash, the system’s crash reporter. Since these reports
corresponded to intentional crashes, they were never useful, and served
only to clutter ~/Library/Logs/DiagnosticReports.
Since Crashpad is adept at handling exceptions on its own, this
introduces the “exception swallowing server”,
crashpad_exception_swallower, which is a Mach exception server that
implements a no-op exception handler routine for all exceptions
received. The exception swallowing server is established as the task
handler for EXC_CRASH and EXC_CORPSE_NOTIFY exceptions during gtest
death tests invoked by {ASSERT,EXPECT}_DEATH_{CHECK,CRASH}, and for all
child processes invoked by the Multiprocess test infrastructure. The
exception swallowing server is not in effect at other times, so
unexpected crashes in test code can still be handled by ReportCrash or
another crash reporter.
With this change in place, no new reports are generated in the
user-level ~/Library/Logs/DiagnosticReports or the system’s
/Library/Logs/DiagnosticReports during a run of Crashpad’s full test
suite on macOS.
Bug: crashpad:33
Change-Id: I13891853a7e25accc30da21fa7ea8bd7d1f3bd2f
Reviewed-on: https://chromium-review.googlesource.com/777859
Commit-Queue: Mark Mentovai <mark@chromium.org>
Reviewed-by: Robert Sesek <rsesek@chromium.org>
263 lines
12 KiB
C++
263 lines
12 KiB
C++
// Copyright 2017 The Crashpad Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "util/misc/from_pointer_cast.h"
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#include <stdlib.h>
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#include <sys/types.h>
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#include <limits>
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#include "build/build_config.h"
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#include "gtest/gtest.h"
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#include "test/gtest_death.h"
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namespace crashpad {
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namespace test {
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namespace {
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struct SomeType {};
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template <typename T>
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class FromPointerCastTest : public testing::Test {};
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using FromPointerCastTestTypes = testing::Types<void*,
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const void*,
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volatile void*,
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const volatile void*,
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SomeType*,
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const SomeType*,
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volatile SomeType*,
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const volatile SomeType*>;
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TYPED_TEST_CASE(FromPointerCastTest, FromPointerCastTestTypes);
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TYPED_TEST(FromPointerCastTest, ToSigned) {
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EXPECT_EQ(FromPointerCast<int64_t>(nullptr), 0);
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EXPECT_EQ(FromPointerCast<int64_t>(reinterpret_cast<TypeParam>(1)), 1);
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EXPECT_EQ(FromPointerCast<int64_t>(reinterpret_cast<TypeParam>(-1)), -1);
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EXPECT_EQ(FromPointerCast<int64_t>(reinterpret_cast<TypeParam>(
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std::numeric_limits<uintptr_t>::max())),
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static_cast<intptr_t>(std::numeric_limits<uintptr_t>::max()));
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EXPECT_EQ(FromPointerCast<int64_t>(reinterpret_cast<TypeParam>(
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std::numeric_limits<intptr_t>::min())),
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std::numeric_limits<intptr_t>::min());
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EXPECT_EQ(FromPointerCast<int64_t>(reinterpret_cast<TypeParam>(
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std::numeric_limits<intptr_t>::max())),
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std::numeric_limits<intptr_t>::max());
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}
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TYPED_TEST(FromPointerCastTest, ToUnsigned) {
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EXPECT_EQ(FromPointerCast<uint64_t>(nullptr), 0u);
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EXPECT_EQ(FromPointerCast<uint64_t>(reinterpret_cast<TypeParam>(1)), 1u);
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EXPECT_EQ(FromPointerCast<uint64_t>(reinterpret_cast<TypeParam>(-1)),
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static_cast<uintptr_t>(-1));
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EXPECT_EQ(FromPointerCast<uint64_t>(reinterpret_cast<TypeParam>(
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std::numeric_limits<uintptr_t>::max())),
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std::numeric_limits<uintptr_t>::max());
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EXPECT_EQ(FromPointerCast<uint64_t>(reinterpret_cast<TypeParam>(
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std::numeric_limits<intptr_t>::min())),
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static_cast<uintptr_t>(std::numeric_limits<intptr_t>::min()));
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EXPECT_EQ(FromPointerCast<uint64_t>(reinterpret_cast<TypeParam>(
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std::numeric_limits<intptr_t>::max())),
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static_cast<uintptr_t>(std::numeric_limits<intptr_t>::max()));
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}
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// MatchCV<YourType, CVQualifiedType>::Type adapts YourType to match the
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// const/void qualification of CVQualifiedType.
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template <typename Base, typename MatchTo>
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struct MatchCV {
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private:
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using NonCVBase = typename std::remove_cv<Base>::type;
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public:
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using Type = typename std::conditional<
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std::is_const<MatchTo>::value,
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typename std::conditional<std::is_volatile<MatchTo>::value,
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const volatile NonCVBase,
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const NonCVBase>::type,
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typename std::conditional<std::is_volatile<MatchTo>::value,
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volatile NonCVBase,
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NonCVBase>::type>::type;
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};
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#if defined(COMPILER_MSVC) && _MSC_VER < 1910
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// gtest under MSVS 2015 (MSC 19.0) doesn’t handle EXPECT_EQ(a, b) when a or b
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// is a pointer to a volatile type, because it can’t figure out how to print
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// them.
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template <typename T>
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typename std::remove_volatile<typename std::remove_pointer<T>::type>::type*
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MaybeRemoveVolatile(const T& value) {
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return const_cast<typename std::remove_volatile<
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typename std::remove_pointer<T>::type>::type*>(value);
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}
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#else // COMPILER_MSVC && _MSC_VER < 1910
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// This isn’t a problem in MSVS 2017 (MSC 19.1) or with other compilers.
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template <typename T>
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T MaybeRemoveVolatile(const T& value) {
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return value;
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}
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#endif // COMPILER_MSVC && _MSC_VER < 1910
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TYPED_TEST(FromPointerCastTest, ToPointer) {
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using CVSomeType =
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typename MatchCV<SomeType,
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typename std::remove_pointer<TypeParam>::type>::Type;
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EXPECT_EQ(MaybeRemoveVolatile(FromPointerCast<CVSomeType*>(nullptr)),
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MaybeRemoveVolatile(static_cast<CVSomeType*>(nullptr)));
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EXPECT_EQ(MaybeRemoveVolatile(
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FromPointerCast<CVSomeType*>(reinterpret_cast<TypeParam>(1))),
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MaybeRemoveVolatile(reinterpret_cast<CVSomeType*>(1)));
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EXPECT_EQ(MaybeRemoveVolatile(
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FromPointerCast<CVSomeType*>(reinterpret_cast<TypeParam>(-1))),
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MaybeRemoveVolatile(reinterpret_cast<CVSomeType*>(-1)));
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EXPECT_EQ(
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MaybeRemoveVolatile(FromPointerCast<CVSomeType*>(
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reinterpret_cast<TypeParam>(std::numeric_limits<uintptr_t>::max()))),
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MaybeRemoveVolatile(reinterpret_cast<CVSomeType*>(
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std::numeric_limits<uintptr_t>::max())));
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EXPECT_EQ(
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MaybeRemoveVolatile(FromPointerCast<CVSomeType*>(
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reinterpret_cast<TypeParam>(std::numeric_limits<intptr_t>::min()))),
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MaybeRemoveVolatile(
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reinterpret_cast<CVSomeType*>(std::numeric_limits<intptr_t>::min())));
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EXPECT_EQ(
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MaybeRemoveVolatile(FromPointerCast<CVSomeType*>(
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reinterpret_cast<TypeParam>(std::numeric_limits<intptr_t>::max()))),
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MaybeRemoveVolatile(
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reinterpret_cast<CVSomeType*>(std::numeric_limits<intptr_t>::max())));
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}
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TEST(FromPointerCast, FromFunctionPointer) {
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// These casts should work with or without the & in &malloc.
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EXPECT_NE(FromPointerCast<int64_t>(malloc), 0);
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EXPECT_NE(FromPointerCast<int64_t>(&malloc), 0);
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EXPECT_NE(FromPointerCast<uint64_t>(malloc), 0u);
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EXPECT_NE(FromPointerCast<uint64_t>(&malloc), 0u);
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EXPECT_EQ(FromPointerCast<void*>(malloc), reinterpret_cast<void*>(malloc));
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EXPECT_EQ(FromPointerCast<void*>(&malloc), reinterpret_cast<void*>(malloc));
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EXPECT_EQ(FromPointerCast<const void*>(malloc),
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reinterpret_cast<const void*>(malloc));
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EXPECT_EQ(FromPointerCast<const void*>(&malloc),
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reinterpret_cast<const void*>(malloc));
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EXPECT_EQ(MaybeRemoveVolatile(FromPointerCast<volatile void*>(malloc)),
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MaybeRemoveVolatile(reinterpret_cast<volatile void*>(malloc)));
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EXPECT_EQ(MaybeRemoveVolatile(FromPointerCast<volatile void*>(&malloc)),
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MaybeRemoveVolatile(reinterpret_cast<volatile void*>(malloc)));
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EXPECT_EQ(
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MaybeRemoveVolatile(FromPointerCast<const volatile void*>(malloc)),
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MaybeRemoveVolatile(reinterpret_cast<const volatile void*>(malloc)));
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EXPECT_EQ(
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MaybeRemoveVolatile(FromPointerCast<const volatile void*>(&malloc)),
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MaybeRemoveVolatile(reinterpret_cast<const volatile void*>(malloc)));
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EXPECT_EQ(FromPointerCast<SomeType*>(malloc),
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reinterpret_cast<SomeType*>(malloc));
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EXPECT_EQ(FromPointerCast<SomeType*>(&malloc),
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reinterpret_cast<SomeType*>(malloc));
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EXPECT_EQ(FromPointerCast<const SomeType*>(malloc),
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reinterpret_cast<const SomeType*>(malloc));
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EXPECT_EQ(FromPointerCast<const SomeType*>(&malloc),
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reinterpret_cast<const SomeType*>(malloc));
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EXPECT_EQ(MaybeRemoveVolatile(FromPointerCast<volatile SomeType*>(malloc)),
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MaybeRemoveVolatile(reinterpret_cast<volatile SomeType*>(malloc)));
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EXPECT_EQ(MaybeRemoveVolatile(FromPointerCast<volatile SomeType*>(&malloc)),
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MaybeRemoveVolatile(reinterpret_cast<volatile SomeType*>(malloc)));
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EXPECT_EQ(
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MaybeRemoveVolatile(FromPointerCast<const volatile SomeType*>(malloc)),
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MaybeRemoveVolatile(reinterpret_cast<const volatile SomeType*>(malloc)));
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EXPECT_EQ(
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MaybeRemoveVolatile(FromPointerCast<const volatile SomeType*>(&malloc)),
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MaybeRemoveVolatile(reinterpret_cast<const volatile SomeType*>(malloc)));
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}
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TEST(FromPointerCast, ToNarrowInteger) {
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EXPECT_EQ(FromPointerCast<int>(nullptr), 0);
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EXPECT_EQ(FromPointerCast<int>(reinterpret_cast<void*>(1)), 1);
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EXPECT_EQ(FromPointerCast<int>(reinterpret_cast<void*>(-1)), -1);
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EXPECT_EQ(FromPointerCast<int>(reinterpret_cast<void*>(
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static_cast<intptr_t>(std::numeric_limits<int>::max()))),
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std::numeric_limits<int>::max());
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EXPECT_EQ(FromPointerCast<int>(reinterpret_cast<void*>(
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static_cast<intptr_t>(std::numeric_limits<int>::min()))),
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std::numeric_limits<int>::min());
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EXPECT_EQ(FromPointerCast<unsigned int>(nullptr), 0u);
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EXPECT_EQ(FromPointerCast<unsigned int>(reinterpret_cast<void*>(1)), 1u);
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EXPECT_EQ(
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FromPointerCast<unsigned int>(reinterpret_cast<void*>(
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static_cast<uintptr_t>(std::numeric_limits<unsigned int>::max()))),
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std::numeric_limits<unsigned int>::max());
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EXPECT_EQ(FromPointerCast<unsigned int>(reinterpret_cast<void*>(
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static_cast<uintptr_t>(std::numeric_limits<int>::max()))),
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static_cast<unsigned int>(std::numeric_limits<int>::max()));
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// int and unsigned int may not be narrower than a pointer, so also test short
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// and unsigned short.
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EXPECT_EQ(FromPointerCast<short>(nullptr), 0);
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EXPECT_EQ(FromPointerCast<short>(reinterpret_cast<void*>(1)), 1);
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EXPECT_EQ(FromPointerCast<short>(reinterpret_cast<void*>(-1)), -1);
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EXPECT_EQ(FromPointerCast<short>(reinterpret_cast<void*>(
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static_cast<intptr_t>(std::numeric_limits<short>::max()))),
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std::numeric_limits<short>::max());
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EXPECT_EQ(FromPointerCast<short>(reinterpret_cast<void*>(
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static_cast<intptr_t>(std::numeric_limits<short>::min()))),
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std::numeric_limits<short>::min());
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EXPECT_EQ(FromPointerCast<unsigned short>(nullptr), 0u);
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EXPECT_EQ(FromPointerCast<unsigned short>(reinterpret_cast<void*>(1)), 1u);
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EXPECT_EQ(
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FromPointerCast<unsigned short>(reinterpret_cast<void*>(
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static_cast<uintptr_t>(std::numeric_limits<unsigned short>::max()))),
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std::numeric_limits<unsigned short>::max());
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EXPECT_EQ(FromPointerCast<unsigned short>(reinterpret_cast<void*>(
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static_cast<uintptr_t>(std::numeric_limits<short>::max()))),
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static_cast<unsigned short>(std::numeric_limits<short>::max()));
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}
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TEST(FromPointerCastDeathTest, ToNarrowInteger) {
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if (sizeof(int) < sizeof(void*)) {
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EXPECT_DEATH_CHECK(
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FromPointerCast<int>(reinterpret_cast<void*>(static_cast<uintptr_t>(
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std::numeric_limits<unsigned int>::max() + 1ull))),
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"");
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EXPECT_DEATH_CHECK(
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FromPointerCast<unsigned int>(
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reinterpret_cast<void*>(static_cast<uintptr_t>(
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std::numeric_limits<unsigned int>::max() + 1ull))),
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"");
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}
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// int and unsigned int may not be narrower than a pointer, so also test short
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// and unsigned short.
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EXPECT_DEATH_CHECK(
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FromPointerCast<short>(reinterpret_cast<void*>(static_cast<uintptr_t>(
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std::numeric_limits<unsigned short>::max() + 1u))),
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"");
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EXPECT_DEATH_CHECK(FromPointerCast<unsigned short>(
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reinterpret_cast<void*>(static_cast<uintptr_t>(
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std::numeric_limits<unsigned short>::max() + 1u))),
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"");
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}
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} // namespace
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} // namespace test
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} // namespace crashpad
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