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244 lines
9.1 KiB
244 lines
9.1 KiB
/*
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* Copyright (C) 2011 The Android Open Source Project
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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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*/
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#include <memory>
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#include <type_traits>
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#include "art_method-inl.h"
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#include "base/arena_allocator.h"
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#include "base/callee_save_type.h"
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#include "base/enums.h"
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#include "base/leb128.h"
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#include "base/malloc_arena_pool.h"
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#include "class_linker.h"
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#include "common_runtime_test.h"
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#include "dex/code_item_accessors-inl.h"
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#include "dex/dex_file-inl.h"
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#include "dex/dex_file.h"
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#include "dex/dex_file_exception_helpers.h"
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#include "gtest/gtest.h"
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#include "handle_scope-inl.h"
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#include "mirror/class-inl.h"
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#include "mirror/object-inl.h"
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#include "mirror/object_array-inl.h"
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#include "mirror/stack_trace_element-inl.h"
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#include "oat_quick_method_header.h"
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#include "obj_ptr-inl.h"
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#include "optimizing/stack_map_stream.h"
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#include "runtime-inl.h"
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#include "scoped_thread_state_change-inl.h"
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#include "thread.h"
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namespace art {
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class ExceptionTest : public CommonRuntimeTest {
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protected:
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// Since various dexers may differ in bytecode layout, we play
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// it safe and simply set the dex pc to the start of the method,
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// which always points to the first source statement.
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static constexpr const uint32_t kDexPc = 0;
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void SetUp() override {
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CommonRuntimeTest::SetUp();
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ScopedObjectAccess soa(Thread::Current());
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StackHandleScope<2> hs(soa.Self());
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Handle<mirror::ClassLoader> class_loader(
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hs.NewHandle(soa.Decode<mirror::ClassLoader>(LoadDex("ExceptionHandle"))));
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my_klass_ = class_linker_->FindClass(soa.Self(), "LExceptionHandle;", class_loader);
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ASSERT_TRUE(my_klass_ != nullptr);
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Handle<mirror::Class> klass(hs.NewHandle(my_klass_));
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class_linker_->EnsureInitialized(soa.Self(), klass, true, true);
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my_klass_ = klass.Get();
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dex_ = my_klass_->GetDexCache()->GetDexFile();
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uint32_t code_size = 12;
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for (size_t i = 0 ; i < code_size; i++) {
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fake_code_.push_back(0x70 | i);
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}
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const uint32_t native_pc_offset = 4u;
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CHECK_ALIGNED_PARAM(native_pc_offset, GetInstructionSetInstructionAlignment(kRuntimeISA));
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MallocArenaPool pool;
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ArenaStack arena_stack(&pool);
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ScopedArenaAllocator allocator(&arena_stack);
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StackMapStream stack_maps(&allocator, kRuntimeISA);
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stack_maps.BeginMethod(4 * sizeof(void*), 0u, 0u, 0u);
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stack_maps.BeginStackMapEntry(kDexPc, native_pc_offset);
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stack_maps.EndStackMapEntry();
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stack_maps.EndMethod(code_size);
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ScopedArenaVector<uint8_t> stack_map = stack_maps.Encode();
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const size_t stack_maps_size = stack_map.size();
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const size_t header_size = sizeof(OatQuickMethodHeader);
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const size_t code_alignment = GetInstructionSetAlignment(kRuntimeISA);
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fake_header_code_and_maps_.resize(stack_maps_size + header_size + code_size + code_alignment);
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// NB: The start of the vector might not have been allocated the desired alignment.
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uint8_t* code_ptr =
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AlignUp(&fake_header_code_and_maps_[stack_maps_size + header_size], code_alignment);
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memcpy(&fake_header_code_and_maps_[0], stack_map.data(), stack_maps_size);
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OatQuickMethodHeader method_header(code_ptr - fake_header_code_and_maps_.data());
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static_assert(std::is_trivially_copyable<OatQuickMethodHeader>::value, "Cannot use memcpy");
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memcpy(code_ptr - header_size, &method_header, header_size);
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memcpy(code_ptr, fake_code_.data(), fake_code_.size());
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if (kRuntimeISA == InstructionSet::kArm) {
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// Check that the Thumb2 adjustment will be a NOP, see EntryPointToCodePointer().
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CHECK_ALIGNED(code_ptr, 2);
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}
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method_f_ = my_klass_->FindClassMethod("f", "()I", kRuntimePointerSize);
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ASSERT_TRUE(method_f_ != nullptr);
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ASSERT_FALSE(method_f_->IsDirect());
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method_f_->SetEntryPointFromQuickCompiledCode(code_ptr);
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method_g_ = my_klass_->FindClassMethod("g", "(I)V", kRuntimePointerSize);
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ASSERT_TRUE(method_g_ != nullptr);
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ASSERT_FALSE(method_g_->IsDirect());
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method_g_->SetEntryPointFromQuickCompiledCode(code_ptr);
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}
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const DexFile* dex_;
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std::vector<uint8_t> fake_code_;
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std::vector<uint8_t> fake_header_code_and_maps_;
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ArtMethod* method_f_;
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ArtMethod* method_g_;
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private:
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ObjPtr<mirror::Class> my_klass_;
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};
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TEST_F(ExceptionTest, FindCatchHandler) {
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ScopedObjectAccess soa(Thread::Current());
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CodeItemDataAccessor accessor(*dex_, method_f_->GetCodeItem());
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ASSERT_TRUE(accessor.HasCodeItem());
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ASSERT_EQ(2u, accessor.TriesSize());
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ASSERT_NE(0u, accessor.InsnsSizeInCodeUnits());
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const dex::TryItem& t0 = accessor.TryItems().begin()[0];
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const dex::TryItem& t1 = accessor.TryItems().begin()[1];
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EXPECT_LE(t0.start_addr_, t1.start_addr_);
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{
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CatchHandlerIterator iter(accessor, 4 /* Dex PC in the first try block */);
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EXPECT_STREQ("Ljava/io/IOException;", dex_->StringByTypeIdx(iter.GetHandlerTypeIndex()));
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ASSERT_TRUE(iter.HasNext());
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iter.Next();
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EXPECT_STREQ("Ljava/lang/Exception;", dex_->StringByTypeIdx(iter.GetHandlerTypeIndex()));
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ASSERT_TRUE(iter.HasNext());
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iter.Next();
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EXPECT_FALSE(iter.HasNext());
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}
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{
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CatchHandlerIterator iter(accessor, 8 /* Dex PC in the second try block */);
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EXPECT_STREQ("Ljava/io/IOException;", dex_->StringByTypeIdx(iter.GetHandlerTypeIndex()));
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ASSERT_TRUE(iter.HasNext());
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iter.Next();
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EXPECT_FALSE(iter.HasNext());
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}
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{
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CatchHandlerIterator iter(accessor, 11 /* Dex PC not in any try block */);
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EXPECT_FALSE(iter.HasNext());
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}
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}
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TEST_F(ExceptionTest, StackTraceElement) {
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Thread* thread = Thread::Current();
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thread->TransitionFromSuspendedToRunnable();
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bool started = runtime_->Start();
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CHECK(started);
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JNIEnv* env = thread->GetJniEnv();
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ScopedObjectAccess soa(env);
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std::vector<uintptr_t> fake_stack;
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Runtime* r = Runtime::Current();
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r->SetInstructionSet(kRuntimeISA);
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ArtMethod* save_method = r->CreateCalleeSaveMethod();
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r->SetCalleeSaveMethod(save_method, CalleeSaveType::kSaveAllCalleeSaves);
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QuickMethodFrameInfo frame_info = r->GetRuntimeMethodFrameInfo(save_method);
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ASSERT_EQ(kStackAlignment, 16U);
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// ASSERT_EQ(sizeof(uintptr_t), sizeof(uint32_t));
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// Create the stack frame for the callee save method, expected by the runtime.
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fake_stack.push_back(reinterpret_cast<uintptr_t>(save_method));
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for (size_t i = 0; i < frame_info.FrameSizeInBytes() - 2 * sizeof(uintptr_t);
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i += sizeof(uintptr_t)) {
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fake_stack.push_back(0);
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}
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fake_stack.push_back(method_g_->GetOatQuickMethodHeader(0)->ToNativeQuickPc(
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method_g_, kDexPc, /* is_for_catch_handler= */ false)); // return pc
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// Create/push fake 16byte stack frame for method g
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fake_stack.push_back(reinterpret_cast<uintptr_t>(method_g_));
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fake_stack.push_back(0);
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fake_stack.push_back(0);
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fake_stack.push_back(method_g_->GetOatQuickMethodHeader(0)->ToNativeQuickPc(
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method_g_, kDexPc, /* is_for_catch_handler= */ false)); // return pc
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// Create/push fake 16byte stack frame for method f
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fake_stack.push_back(reinterpret_cast<uintptr_t>(method_f_));
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fake_stack.push_back(0);
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fake_stack.push_back(0);
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fake_stack.push_back(0xEBAD6070); // return pc
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// Push Method* of null to terminate the trace
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fake_stack.push_back(0);
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// Push null values which will become null incoming arguments.
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fake_stack.push_back(0);
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fake_stack.push_back(0);
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fake_stack.push_back(0);
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// Set up thread to appear as if we called out of method_g_ at given pc dex.
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thread->SetTopOfStack(reinterpret_cast<ArtMethod**>(&fake_stack[0]));
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jobject internal = thread->CreateInternalStackTrace(soa);
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ASSERT_TRUE(internal != nullptr);
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jobjectArray ste_array = Thread::InternalStackTraceToStackTraceElementArray(soa, internal);
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ASSERT_TRUE(ste_array != nullptr);
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auto trace_array = soa.Decode<mirror::ObjectArray<mirror::StackTraceElement>>(ste_array);
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ASSERT_TRUE(trace_array != nullptr);
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ASSERT_TRUE(trace_array->Get(0) != nullptr);
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EXPECT_STREQ("ExceptionHandle",
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trace_array->Get(0)->GetDeclaringClass()->ToModifiedUtf8().c_str());
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EXPECT_STREQ("ExceptionHandle.java",
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trace_array->Get(0)->GetFileName()->ToModifiedUtf8().c_str());
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EXPECT_STREQ("g", trace_array->Get(0)->GetMethodName()->ToModifiedUtf8().c_str());
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EXPECT_EQ(36, trace_array->Get(0)->GetLineNumber());
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ASSERT_TRUE(trace_array->Get(1) != nullptr);
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EXPECT_STREQ("ExceptionHandle",
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trace_array->Get(1)->GetDeclaringClass()->ToModifiedUtf8().c_str());
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EXPECT_STREQ("ExceptionHandle.java",
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trace_array->Get(1)->GetFileName()->ToModifiedUtf8().c_str());
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EXPECT_STREQ("f", trace_array->Get(1)->GetMethodName()->ToModifiedUtf8().c_str());
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EXPECT_EQ(22, trace_array->Get(1)->GetLineNumber());
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thread->SetTopOfStack(nullptr); // Disarm the assertion that no code is running when we detach.
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}
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} // namespace art
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