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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "common_runtime_test.h"
#include "base/memory_tool.h"
#include "class_linker-inl.h"
#include "class_root-inl.h"
#include "handle_scope-inl.h"
#include "mirror/object-inl.h"
#include "mirror/object_array-alloc-inl.h"
#include "mirror/object_array-inl.h"
#include "mirror/string.h"
#include "runtime.h"
#include "scoped_thread_state_change-inl.h"
#include "verification-inl.h"
namespace art {
namespace gc {
class VerificationTest : public CommonRuntimeTest {
protected:
VerificationTest() {
use_boot_image_ = true; // Make the Runtime creation cheaper.
}
template <class T>
ObjPtr<mirror::ObjectArray<T>> AllocObjectArray(Thread* self, size_t length)
REQUIRES_SHARED(Locks::mutator_lock_) {
return mirror::ObjectArray<T>::Alloc(
self,
GetClassRoot<mirror::ObjectArray<mirror::Object>>(),
length);
}
};
TEST_F(VerificationTest, IsValidHeapObjectAddress) {
ScopedObjectAccess soa(Thread::Current());
const Verification* const v = Runtime::Current()->GetHeap()->GetVerification();
EXPECT_FALSE(v->IsValidHeapObjectAddress(reinterpret_cast<const void*>(1)));
EXPECT_FALSE(v->IsValidHeapObjectAddress(reinterpret_cast<const void*>(4)));
EXPECT_FALSE(v->IsValidHeapObjectAddress(nullptr));
VariableSizedHandleScope hs(soa.Self());
Handle<mirror::String> string(
hs.NewHandle(mirror::String::AllocFromModifiedUtf8(soa.Self(), "test")));
EXPECT_TRUE(v->IsValidHeapObjectAddress(string.Get()));
// Address in the heap that isn't aligned.
const void* unaligned_address =
reinterpret_cast<const void*>(reinterpret_cast<uintptr_t>(string.Get()) + 1);
EXPECT_TRUE(v->IsAddressInHeapSpace(unaligned_address));
EXPECT_FALSE(v->IsValidHeapObjectAddress(unaligned_address));
EXPECT_TRUE(v->IsValidHeapObjectAddress(string->GetClass()));
const uintptr_t uint_klass = reinterpret_cast<uintptr_t>(string->GetClass());
// Not actually a valid object but the verification can't know that. Guaranteed to be inside a
// heap space.
EXPECT_TRUE(v->IsValidHeapObjectAddress(
reinterpret_cast<const void*>(uint_klass + kObjectAlignment)));
EXPECT_FALSE(v->IsValidHeapObjectAddress(
reinterpret_cast<const void*>(&uint_klass)));
}
TEST_F(VerificationTest, IsValidClassOrNotInHeap) {
ScopedObjectAccess soa(Thread::Current());
VariableSizedHandleScope hs(soa.Self());
Handle<mirror::String> string(
hs.NewHandle(mirror::String::AllocFromModifiedUtf8(soa.Self(), "test")));
const Verification* const v = Runtime::Current()->GetHeap()->GetVerification();
EXPECT_FALSE(v->IsValidClass(reinterpret_cast<mirror::Class*>(1)));
EXPECT_FALSE(v->IsValidClass(reinterpret_cast<mirror::Class*>(4)));
EXPECT_FALSE(v->IsValidClass(nullptr));
EXPECT_TRUE(v->IsValidClass(string->GetClass()));
EXPECT_FALSE(v->IsValidClass(reinterpret_cast<mirror::Class*>(string.Get())));
}
TEST_F(VerificationTest, IsValidClassInHeap) {
// Now that the String class is allocated in the non-moving space when the
// runtime is running without a boot image (which is the case in this gtest),
// and we run with AddressSanizer, it is possible that the (presumably
// invalid) memory location `uint_klass - kObjectAlignment` tested below is
// poisoned when running with AddressSanizer. Disable this test in that case.
TEST_DISABLED_FOR_MEMORY_TOOL();
ScopedObjectAccess soa(Thread::Current());
VariableSizedHandleScope hs(soa.Self());
Handle<mirror::String> string(
hs.NewHandle(mirror::String::AllocFromModifiedUtf8(soa.Self(), "test")));
const Verification* const v = Runtime::Current()->GetHeap()->GetVerification();
uintptr_t uint_klass = reinterpret_cast<uintptr_t>(string->GetClass());
EXPECT_FALSE(v->IsValidClass(reinterpret_cast<mirror::Class*>(uint_klass - kObjectAlignment)));
EXPECT_FALSE(v->IsValidClass(reinterpret_cast<mirror::Class*>(&uint_klass)));
}
TEST_F(VerificationTest, DumpInvalidObjectInfo) {
ScopedLogSeverity sls(LogSeverity::INFO);
ScopedObjectAccess soa(Thread::Current());
Runtime* const runtime = Runtime::Current();
VariableSizedHandleScope hs(soa.Self());
const Verification* const v = runtime->GetHeap()->GetVerification();
LOG(INFO) << v->DumpObjectInfo(reinterpret_cast<const void*>(1), "obj");
LOG(INFO) << v->DumpObjectInfo(reinterpret_cast<const void*>(4), "obj");
LOG(INFO) << v->DumpObjectInfo(nullptr, "obj");
}
TEST_F(VerificationTest, DumpValidObjectInfo) {
// Now that the String class is allocated in the non-moving space when the
// runtime is running without a boot image (which is the case in this gtest),
// and we run with AddressSanizer, it is possible that the calls to
// Verification::DumpObjectInfo below involving the String class object
// (`string->GetClass()`, `uint_klass`, etc.) access poisoned memory when they
// call Verification::DumpRAMAroundAddress. Disable this test in that case.
TEST_DISABLED_FOR_MEMORY_TOOL();
ScopedLogSeverity sls(LogSeverity::INFO);
ScopedObjectAccess soa(Thread::Current());
Runtime* const runtime = Runtime::Current();
VariableSizedHandleScope hs(soa.Self());
Handle<mirror::String> string(
hs.NewHandle(mirror::String::AllocFromModifiedUtf8(soa.Self(), "obj")));
Handle<mirror::ObjectArray<mirror::Object>> arr(
hs.NewHandle(AllocObjectArray<mirror::Object>(soa.Self(), 256)));
const Verification* const v = runtime->GetHeap()->GetVerification();
LOG(INFO) << v->DumpObjectInfo(string.Get(), "test");
LOG(INFO) << v->DumpObjectInfo(string->GetClass(), "obj");
const uintptr_t uint_klass = reinterpret_cast<uintptr_t>(string->GetClass());
LOG(INFO) << v->DumpObjectInfo(reinterpret_cast<const void*>(uint_klass - kObjectAlignment),
"obj");
LOG(INFO) << v->DumpObjectInfo(reinterpret_cast<const void*>(&uint_klass), "obj");
LOG(INFO) << v->DumpObjectInfo(arr.Get(), "arr");
}
TEST_F(VerificationTest, LogHeapCorruption) {
// Now that the String class is allocated in the non-moving space when the
// runtime is running without a boot image (which is the case in this gtest),
// and we run with AddressSanizer, it is possible that the call to
// Verification::LogHeapCorruption below involving the String class object
// (`string->GetClass()`) accesses poisoned memory when it calls
// Verification::DumpRAMAroundAddress. Disable this test in that case.
TEST_DISABLED_FOR_MEMORY_TOOL();
ScopedLogSeverity sls(LogSeverity::INFO);
ScopedObjectAccess soa(Thread::Current());
Runtime* const runtime = Runtime::Current();
VariableSizedHandleScope hs(soa.Self());
Handle<mirror::String> string(
hs.NewHandle(mirror::String::AllocFromModifiedUtf8(soa.Self(), "obj")));
using ObjArray = mirror::ObjectArray<mirror::Object>;
Handle<ObjArray> arr(
hs.NewHandle(AllocObjectArray<mirror::Object>(soa.Self(), 256)));
const Verification* const v = runtime->GetHeap()->GetVerification();
arr->Set(0, string.Get());
// Test normal cases.
v->LogHeapCorruption(arr.Get(), ObjArray::DataOffset(kHeapReferenceSize), string.Get(), false);
v->LogHeapCorruption(string.Get(), mirror::Object::ClassOffset(), string->GetClass(), false);
// Test null holder cases.
v->LogHeapCorruption(nullptr, MemberOffset(0), string.Get(), false);
v->LogHeapCorruption(nullptr, MemberOffset(0), arr.Get(), false);
}
TEST_F(VerificationTest, FindPathFromRootSet) {
ScopedLogSeverity sls(LogSeverity::INFO);
ScopedObjectAccess soa(Thread::Current());
Runtime* const runtime = Runtime::Current();
VariableSizedHandleScope hs(soa.Self());
Handle<mirror::ObjectArray<mirror::Object>> arr(
hs.NewHandle(AllocObjectArray<mirror::Object>(soa.Self(), 256)));
ObjPtr<mirror::String> str = mirror::String::AllocFromModifiedUtf8(soa.Self(), "obj");
arr->Set(0, str);
const Verification* const v = runtime->GetHeap()->GetVerification();
std::string path = v->FirstPathFromRootSet(str);
EXPECT_GT(path.length(), 0u);
std::ostringstream oss;
oss << arr.Get();
EXPECT_NE(path.find(oss.str()), std::string::npos);
LOG(INFO) << path;
}
} // namespace gc
} // namespace art
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