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/*
* Copyright (C) 2011 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 <sys/mman.h>
#include "UniquePtr.h"
#include "assembler.h"
#include "class_linker.h"
#include "common_test.h"
#include "dex_file.h"
#include "gtest/gtest.h"
#include "jni_compiler.h"
#include "runtime.h"
#include "thread.h"
namespace art {
class ExceptionTest : public CommonTest {
protected:
virtual void SetUp() {
CommonTest::SetUp();
SirtRef<ClassLoader> class_loader(LoadDex("ExceptionHandle"));
my_klass_ = class_linker_->FindClass("LExceptionHandle;", class_loader.get());
ASSERT_TRUE(my_klass_ != NULL);
dex_ = &Runtime::Current()->GetClassLinker()->FindDexFile(my_klass_->GetDexCache());
for (size_t i = 0 ; i < 12; i++) {
fake_code_.push_back(0x70000000 | i);
}
fake_mapping_data_.push_back(2); // first element is count of remaining elements
fake_mapping_data_.push_back(3); // offset 3
fake_mapping_data_.push_back(3); // maps to dex offset 3
method_f_ = my_klass_->FindVirtualMethod("f", "()I");
ASSERT_TRUE(method_f_ != NULL);
method_f_->SetFrameSizeInBytes(kStackAlignment);
method_f_->SetCode(CompiledMethod::CodePointer(&fake_code_[0], kThumb2));
method_f_->SetMappingTable(&fake_mapping_data_[0]);
method_g_ = my_klass_->FindVirtualMethod("g", "(I)V");
ASSERT_TRUE(method_g_ != NULL);
method_g_->SetFrameSizeInBytes(kStackAlignment);
method_g_->SetCode(CompiledMethod::CodePointer(&fake_code_[0], kThumb2));
method_g_->SetMappingTable(&fake_mapping_data_[0]);
}
const DexFile* dex_;
std::vector<uint8_t> fake_code_;
std::vector<uint32_t> fake_mapping_data_;
Method* method_f_;
Method* method_g_;
private:
Class* my_klass_;
};
TEST_F(ExceptionTest, FindCatchHandler) {
const DexFile::CodeItem* code_item = dex_->GetCodeItem(method_f_->GetCodeItemOffset());
ASSERT_TRUE(code_item != NULL);
ASSERT_EQ(2u, code_item->tries_size_);
ASSERT_NE(0u, code_item->insns_size_in_code_units_);
const struct DexFile::TryItem *t0, *t1;
t0 = dex_->GetTryItems(*code_item, 0);
t1 = dex_->GetTryItems(*code_item, 1);
EXPECT_LE(t0->start_addr_, t1->start_addr_);
{
CatchHandlerIterator iter(*code_item, 4 /* Dex PC in the first try block */);
EXPECT_STREQ("Ljava/io/IOException;", dex_->StringByTypeIdx(iter.GetHandlerTypeIndex()));
ASSERT_TRUE(iter.HasNext());
iter.Next();
EXPECT_STREQ("Ljava/lang/Exception;", dex_->StringByTypeIdx(iter.GetHandlerTypeIndex()));
ASSERT_TRUE(iter.HasNext());
iter.Next();
EXPECT_FALSE(iter.HasNext());
}
{
CatchHandlerIterator iter(*code_item, 8 /* Dex PC in the second try block */);
EXPECT_STREQ("Ljava/io/IOException;", dex_->StringByTypeIdx(iter.GetHandlerTypeIndex()));
ASSERT_TRUE(iter.HasNext());
iter.Next();
EXPECT_FALSE(iter.HasNext());
}
{
CatchHandlerIterator iter(*code_item, 11 /* Dex PC not in any try block */);
EXPECT_FALSE(iter.HasNext());
}
}
TEST_F(ExceptionTest, StackTraceElement) {
runtime_->Start();
std::vector<uintptr_t> fake_stack;
ASSERT_EQ(kStackAlignment, 16);
ASSERT_EQ(sizeof(uintptr_t), sizeof(uint32_t));
// Create two fake stack frames with mapping data created in SetUp. We map offset 3 in the code
// to dex pc 3, however, we set the return pc to 5 as the stack walker always subtracts two
// from a return pc.
const uintptr_t pc_offset = 3 + 2;
// Create/push fake 16byte stack frame for method g
fake_stack.push_back(reinterpret_cast<uintptr_t>(method_g_));
fake_stack.push_back(0);
fake_stack.push_back(0);
fake_stack.push_back(reinterpret_cast<uintptr_t>(method_f_->GetCode()) + pc_offset); // return pc
// Create/push fake 16byte stack frame for method f
fake_stack.push_back(reinterpret_cast<uintptr_t>(method_f_));
fake_stack.push_back(0);
fake_stack.push_back(0);
fake_stack.push_back(0xEBAD6070); // return pc
// Pull Method* of NULL to terminate the trace
fake_stack.push_back(0);
// Set up thread to appear as if we called out of method_g_ at pc 3
Thread* thread = Thread::Current();
thread->SetTopOfStack(&fake_stack[0], reinterpret_cast<uintptr_t>(method_g_->GetCode()) + pc_offset); // return pc
JNIEnv* env = thread->GetJniEnv();
jobject internal = thread->CreateInternalStackTrace(env);
jobjectArray ste_array = Thread::InternalStackTraceToStackTraceElementArray(env, internal);
ObjectArray<StackTraceElement>* trace_array =
Decode<ObjectArray<StackTraceElement>*>(env, ste_array);
ASSERT_TRUE(trace_array->Get(0) != NULL);
EXPECT_STREQ("ExceptionHandle",
trace_array->Get(0)->GetDeclaringClass()->ToModifiedUtf8().c_str());
EXPECT_STREQ("ExceptionHandle.java", trace_array->Get(0)->GetFileName()->ToModifiedUtf8().c_str());
EXPECT_STREQ("g", trace_array->Get(0)->GetMethodName()->ToModifiedUtf8().c_str());
EXPECT_EQ(22, trace_array->Get(0)->GetLineNumber());
ASSERT_TRUE(trace_array->Get(1) != NULL);
EXPECT_STREQ("ExceptionHandle",
trace_array->Get(1)->GetDeclaringClass()->ToModifiedUtf8().c_str());
EXPECT_STREQ("ExceptionHandle.java", trace_array->Get(1)->GetFileName()->ToModifiedUtf8().c_str());
EXPECT_STREQ("f", trace_array->Get(1)->GetMethodName()->ToModifiedUtf8().c_str());
EXPECT_EQ(7, trace_array->Get(1)->GetLineNumber());
}
} // namespace art