1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <memory> 18 19 #include "class_linker.h" 20 #include "common_runtime_test.h" 21 #include "dex_file.h" 22 #include "dex_file-inl.h" 23 #include "gtest/gtest.h" 24 #include "leb128.h" 25 #include "mirror/class-inl.h" 26 #include "mirror/object_array-inl.h" 27 #include "mirror/object-inl.h" 28 #include "mirror/stack_trace_element.h" 29 #include "runtime.h" 30 #include "scoped_thread_state_change.h" 31 #include "handle_scope-inl.h" 32 #include "thread.h" 33 #include "vmap_table.h" 34 35 namespace art { 36 37 class ExceptionTest : public CommonRuntimeTest { 38 protected: 39 virtual void SetUp() { 40 CommonRuntimeTest::SetUp(); 41 42 ScopedObjectAccess soa(Thread::Current()); 43 StackHandleScope<2> hs(soa.Self()); 44 Handle<mirror::ClassLoader> class_loader( 45 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(LoadDex("ExceptionHandle")))); 46 my_klass_ = class_linker_->FindClass(soa.Self(), "LExceptionHandle;", class_loader); 47 ASSERT_TRUE(my_klass_ != nullptr); 48 Handle<mirror::Class> klass(hs.NewHandle(my_klass_)); 49 class_linker_->EnsureInitialized(soa.Self(), klass, true, true); 50 my_klass_ = klass.Get(); 51 52 dex_ = my_klass_->GetDexCache()->GetDexFile(); 53 54 uint32_t code_size = 12; 55 for (size_t i = 0 ; i < code_size; i++) { 56 fake_code_.push_back(0x70 | i); 57 } 58 59 fake_mapping_data_.PushBackUnsigned(4); // first element is count 60 fake_mapping_data_.PushBackUnsigned(4); // total (non-length) elements 61 fake_mapping_data_.PushBackUnsigned(2); // count of pc to dex elements 62 // --- pc to dex table 63 fake_mapping_data_.PushBackUnsigned(3 - 0); // offset 3 64 fake_mapping_data_.PushBackSigned(3 - 0); // maps to dex offset 3 65 // --- dex to pc table 66 fake_mapping_data_.PushBackUnsigned(3 - 0); // offset 3 67 fake_mapping_data_.PushBackSigned(3 - 0); // maps to dex offset 3 68 69 fake_vmap_table_data_.PushBackUnsigned(0 + VmapTable::kEntryAdjustment); 70 71 fake_gc_map_.push_back(0); // 0 bytes to encode references and native pc offsets. 72 fake_gc_map_.push_back(0); 73 fake_gc_map_.push_back(0); // 0 entries. 74 fake_gc_map_.push_back(0); 75 76 const std::vector<uint8_t>& fake_vmap_table_data = fake_vmap_table_data_.GetData(); 77 const std::vector<uint8_t>& fake_mapping_data = fake_mapping_data_.GetData(); 78 uint32_t vmap_table_offset = sizeof(OatQuickMethodHeader) + fake_vmap_table_data.size(); 79 uint32_t mapping_table_offset = vmap_table_offset + fake_mapping_data.size(); 80 uint32_t gc_map_offset = mapping_table_offset + fake_gc_map_.size(); 81 OatQuickMethodHeader method_header(mapping_table_offset, vmap_table_offset, gc_map_offset, 82 4 * sizeof(void*), 0u, 0u, code_size); 83 fake_header_code_and_maps_.resize(sizeof(method_header)); 84 memcpy(&fake_header_code_and_maps_[0], &method_header, sizeof(method_header)); 85 fake_header_code_and_maps_.insert(fake_header_code_and_maps_.begin(), 86 fake_vmap_table_data.begin(), fake_vmap_table_data.end()); 87 fake_header_code_and_maps_.insert(fake_header_code_and_maps_.begin(), 88 fake_mapping_data.begin(), fake_mapping_data.end()); 89 fake_header_code_and_maps_.insert(fake_header_code_and_maps_.begin(), 90 fake_gc_map_.begin(), fake_gc_map_.end()); 91 fake_header_code_and_maps_.insert(fake_header_code_and_maps_.end(), 92 fake_code_.begin(), fake_code_.end()); 93 94 // NOTE: Don't align the code (it will not be executed) but check that the Thumb2 95 // adjustment will be a NOP, see ArtMethod::EntryPointToCodePointer(). 96 CHECK_EQ(mapping_table_offset & 1u, 0u); 97 const uint8_t* code_ptr = &fake_header_code_and_maps_[gc_map_offset]; 98 99 method_f_ = my_klass_->FindVirtualMethod("f", "()I", sizeof(void*)); 100 ASSERT_TRUE(method_f_ != nullptr); 101 method_f_->SetEntryPointFromQuickCompiledCode(code_ptr); 102 103 method_g_ = my_klass_->FindVirtualMethod("g", "(I)V", sizeof(void*)); 104 ASSERT_TRUE(method_g_ != nullptr); 105 method_g_->SetEntryPointFromQuickCompiledCode(code_ptr); 106 } 107 108 const DexFile* dex_; 109 110 std::vector<uint8_t> fake_code_; 111 Leb128EncodingVector fake_mapping_data_; 112 Leb128EncodingVector fake_vmap_table_data_; 113 std::vector<uint8_t> fake_gc_map_; 114 std::vector<uint8_t> fake_header_code_and_maps_; 115 116 ArtMethod* method_f_; 117 ArtMethod* method_g_; 118 119 private: 120 mirror::Class* my_klass_; 121 }; 122 123 TEST_F(ExceptionTest, FindCatchHandler) { 124 ScopedObjectAccess soa(Thread::Current()); 125 const DexFile::CodeItem* code_item = dex_->GetCodeItem(method_f_->GetCodeItemOffset()); 126 127 ASSERT_TRUE(code_item != nullptr); 128 129 ASSERT_EQ(2u, code_item->tries_size_); 130 ASSERT_NE(0u, code_item->insns_size_in_code_units_); 131 132 const DexFile::TryItem *t0, *t1; 133 t0 = dex_->GetTryItems(*code_item, 0); 134 t1 = dex_->GetTryItems(*code_item, 1); 135 EXPECT_LE(t0->start_addr_, t1->start_addr_); 136 { 137 CatchHandlerIterator iter(*code_item, 4 /* Dex PC in the first try block */); 138 EXPECT_STREQ("Ljava/io/IOException;", dex_->StringByTypeIdx(iter.GetHandlerTypeIndex())); 139 ASSERT_TRUE(iter.HasNext()); 140 iter.Next(); 141 EXPECT_STREQ("Ljava/lang/Exception;", dex_->StringByTypeIdx(iter.GetHandlerTypeIndex())); 142 ASSERT_TRUE(iter.HasNext()); 143 iter.Next(); 144 EXPECT_FALSE(iter.HasNext()); 145 } 146 { 147 CatchHandlerIterator iter(*code_item, 8 /* Dex PC in the second try block */); 148 EXPECT_STREQ("Ljava/io/IOException;", dex_->StringByTypeIdx(iter.GetHandlerTypeIndex())); 149 ASSERT_TRUE(iter.HasNext()); 150 iter.Next(); 151 EXPECT_FALSE(iter.HasNext()); 152 } 153 { 154 CatchHandlerIterator iter(*code_item, 11 /* Dex PC not in any try block */); 155 EXPECT_FALSE(iter.HasNext()); 156 } 157 } 158 159 TEST_F(ExceptionTest, StackTraceElement) { 160 Thread* thread = Thread::Current(); 161 thread->TransitionFromSuspendedToRunnable(); 162 bool started = runtime_->Start(); 163 CHECK(started); 164 JNIEnv* env = thread->GetJniEnv(); 165 ScopedObjectAccess soa(env); 166 167 std::vector<uintptr_t> fake_stack; 168 Runtime* r = Runtime::Current(); 169 r->SetInstructionSet(kRuntimeISA); 170 ArtMethod* save_method = r->CreateCalleeSaveMethod(); 171 r->SetCalleeSaveMethod(save_method, Runtime::kSaveAll); 172 QuickMethodFrameInfo frame_info = save_method->GetQuickFrameInfo(); 173 174 ASSERT_EQ(kStackAlignment, 16U); 175 // ASSERT_EQ(sizeof(uintptr_t), sizeof(uint32_t)); 176 177 178 // Create three fake stack frames with mapping data created in SetUp. We map offset 3 in the 179 // code to dex pc 3. 180 const uint32_t dex_pc = 3; 181 182 // Create the stack frame for the callee save method, expected by the runtime. 183 fake_stack.push_back(reinterpret_cast<uintptr_t>(save_method)); 184 for (size_t i = 0; i < frame_info.FrameSizeInBytes() - 2 * sizeof(uintptr_t); 185 i += sizeof(uintptr_t)) { 186 fake_stack.push_back(0); 187 } 188 189 fake_stack.push_back(method_g_->ToNativeQuickPc(dex_pc)); // return pc 190 191 // Create/push fake 16byte stack frame for method g 192 fake_stack.push_back(reinterpret_cast<uintptr_t>(method_g_)); 193 fake_stack.push_back(0); 194 fake_stack.push_back(0); 195 fake_stack.push_back(method_f_->ToNativeQuickPc(dex_pc)); // return pc 196 197 // Create/push fake 16byte stack frame for method f 198 fake_stack.push_back(reinterpret_cast<uintptr_t>(method_f_)); 199 fake_stack.push_back(0); 200 fake_stack.push_back(0); 201 fake_stack.push_back(0xEBAD6070); // return pc 202 203 // Push Method* of null to terminate the trace 204 fake_stack.push_back(0); 205 206 // Push null values which will become null incoming arguments. 207 fake_stack.push_back(0); 208 fake_stack.push_back(0); 209 fake_stack.push_back(0); 210 211 // Set up thread to appear as if we called out of method_g_ at pc dex 3 212 thread->SetTopOfStack(reinterpret_cast<ArtMethod**>(&fake_stack[0])); 213 214 jobject internal = thread->CreateInternalStackTrace<false>(soa); 215 ASSERT_TRUE(internal != nullptr); 216 jobjectArray ste_array = Thread::InternalStackTraceToStackTraceElementArray(soa, internal); 217 ASSERT_TRUE(ste_array != nullptr); 218 auto* trace_array = soa.Decode<mirror::ObjectArray<mirror::StackTraceElement>*>(ste_array); 219 220 ASSERT_TRUE(trace_array != nullptr); 221 ASSERT_TRUE(trace_array->Get(0) != nullptr); 222 EXPECT_STREQ("ExceptionHandle", 223 trace_array->Get(0)->GetDeclaringClass()->ToModifiedUtf8().c_str()); 224 EXPECT_STREQ("ExceptionHandle.java", 225 trace_array->Get(0)->GetFileName()->ToModifiedUtf8().c_str()); 226 EXPECT_STREQ("g", trace_array->Get(0)->GetMethodName()->ToModifiedUtf8().c_str()); 227 EXPECT_EQ(37, trace_array->Get(0)->GetLineNumber()); 228 229 ASSERT_TRUE(trace_array->Get(1) != nullptr); 230 EXPECT_STREQ("ExceptionHandle", 231 trace_array->Get(1)->GetDeclaringClass()->ToModifiedUtf8().c_str()); 232 EXPECT_STREQ("ExceptionHandle.java", 233 trace_array->Get(1)->GetFileName()->ToModifiedUtf8().c_str()); 234 EXPECT_STREQ("f", trace_array->Get(1)->GetMethodName()->ToModifiedUtf8().c_str()); 235 EXPECT_EQ(22, trace_array->Get(1)->GetLineNumber()); 236 237 thread->SetTopOfStack(nullptr); // Disarm the assertion that no code is running when we detach. 238 } 239 240 } // namespace art 241
