exception_test.cc revision 2dd0e2cea360bc9206eb88ecc40d259e796c239d 
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 "class_linker.h"
18#include "common_test.h"
19#include "dex_file.h"
20#include "gtest/gtest.h"
21#include "mirror/object_array-inl.h"
22#include "mirror/stack_trace_element.h"
23#include "runtime.h"
24#include "scoped_thread_state_change.h"
25#include "sirt_ref.h"
26#include "thread.h"
27#include "UniquePtr.h"
28
29namespace art {
30
31class ExceptionTest : public CommonTest {
32 protected:
33  virtual void SetUp() {
34    CommonTest::SetUp();
35
36    ScopedObjectAccess soa(Thread::Current());
37    SirtRef<mirror::ClassLoader> class_loader(soa.Self(),
38                                      soa.Decode<mirror::ClassLoader*>(LoadDex("ExceptionHandle")));
39    my_klass_ = class_linker_->FindClass("LExceptionHandle;", class_loader.get());
40    ASSERT_TRUE(my_klass_ != NULL);
41    class_linker_->EnsureInitialized(my_klass_, false, true);
42
43    dex_ = my_klass_->GetDexCache()->GetDexFile();
44
45    uint32_t code_size = 12;
46    fake_code_.push_back((code_size >> 24) & 0xFF);
47    fake_code_.push_back((code_size >> 16) & 0xFF);
48    fake_code_.push_back((code_size >>  8) & 0xFF);
49    fake_code_.push_back((code_size >>  0) & 0xFF);
50    for (size_t i = 0 ; i < code_size; i++) {
51      fake_code_.push_back(0x70 | i);
52    }
53
54    fake_mapping_data_.push_back(4);  // first element is count
55    fake_mapping_data_.push_back(4);  // total (non-length) elements
56    fake_mapping_data_.push_back(2);  // count of pc to dex elements
57                                      // ---  pc to dex table
58    fake_mapping_data_.push_back(3);  // offset 3
59    fake_mapping_data_.push_back(3);  // maps to dex offset 3
60                                      // ---  dex to pc table
61    fake_mapping_data_.push_back(3);  // offset 3
62    fake_mapping_data_.push_back(3);  // maps to dex offset 3
63
64    fake_vmap_table_data_.push_back(0);
65
66    fake_gc_map_.push_back(0);  // 0 bytes to encode references and native pc offsets.
67    fake_gc_map_.push_back(0);
68    fake_gc_map_.push_back(0);  // 0 entries.
69    fake_gc_map_.push_back(0);
70
71    method_f_ = my_klass_->FindVirtualMethod("f", "()I");
72    ASSERT_TRUE(method_f_ != NULL);
73    method_f_->SetFrameSizeInBytes(kStackAlignment);
74    method_f_->SetCode(CompiledMethod::CodePointer(&fake_code_[sizeof(code_size)], kThumb2));
75    method_f_->SetMappingTable(&fake_mapping_data_[0]);
76    method_f_->SetVmapTable(&fake_vmap_table_data_[0]);
77    method_f_->SetNativeGcMap(&fake_gc_map_[0]);
78
79    method_g_ = my_klass_->FindVirtualMethod("g", "(I)V");
80    ASSERT_TRUE(method_g_ != NULL);
81    method_g_->SetFrameSizeInBytes(kStackAlignment);
82    method_g_->SetCode(CompiledMethod::CodePointer(&fake_code_[sizeof(code_size)], kThumb2));
83    method_g_->SetMappingTable(&fake_mapping_data_[0]);
84    method_g_->SetVmapTable(&fake_vmap_table_data_[0]);
85    method_g_->SetNativeGcMap(&fake_gc_map_[0]);
86  }
87
88  const DexFile* dex_;
89
90  std::vector<uint8_t> fake_code_;
91  std::vector<uint32_t> fake_mapping_data_;
92  std::vector<uint16_t> fake_vmap_table_data_;
93  std::vector<uint8_t> fake_gc_map_;
94
95  mirror::AbstractMethod* method_f_;
96  mirror::AbstractMethod* method_g_;
97
98 private:
99  mirror::Class* my_klass_;
100};
101
102TEST_F(ExceptionTest, FindCatchHandler) {
103  const DexFile::CodeItem* code_item = dex_->GetCodeItem(method_f_->GetCodeItemOffset());
104
105  ASSERT_TRUE(code_item != NULL);
106
107  ASSERT_EQ(2u, code_item->tries_size_);
108  ASSERT_NE(0u, code_item->insns_size_in_code_units_);
109
110  const DexFile::TryItem *t0, *t1;
111  t0 = dex_->GetTryItems(*code_item, 0);
112  t1 = dex_->GetTryItems(*code_item, 1);
113  EXPECT_LE(t0->start_addr_, t1->start_addr_);
114  {
115    CatchHandlerIterator iter(*code_item, 4 /* Dex PC in the first try block */);
116    EXPECT_STREQ("Ljava/io/IOException;", dex_->StringByTypeIdx(iter.GetHandlerTypeIndex()));
117    ASSERT_TRUE(iter.HasNext());
118    iter.Next();
119    EXPECT_STREQ("Ljava/lang/Exception;", dex_->StringByTypeIdx(iter.GetHandlerTypeIndex()));
120    ASSERT_TRUE(iter.HasNext());
121    iter.Next();
122    EXPECT_FALSE(iter.HasNext());
123  }
124  {
125    CatchHandlerIterator iter(*code_item, 8 /* Dex PC in the second try block */);
126    EXPECT_STREQ("Ljava/io/IOException;", dex_->StringByTypeIdx(iter.GetHandlerTypeIndex()));
127    ASSERT_TRUE(iter.HasNext());
128    iter.Next();
129    EXPECT_FALSE(iter.HasNext());
130  }
131  {
132    CatchHandlerIterator iter(*code_item, 11 /* Dex PC not in any try block */);
133    EXPECT_FALSE(iter.HasNext());
134  }
135}
136
137TEST_F(ExceptionTest, StackTraceElement) {
138  Thread* thread = Thread::Current();
139  thread->TransitionFromSuspendedToRunnable();
140  runtime_->Start();
141  JNIEnv* env = thread->GetJniEnv();
142  ScopedObjectAccess soa(env);
143
144  std::vector<uintptr_t> fake_stack;
145  ASSERT_EQ(kStackAlignment, 16);
146  ASSERT_EQ(sizeof(uintptr_t), sizeof(uint32_t));
147
148#if !defined(ART_USE_LLVM_COMPILER)
149  // Create two fake stack frames with mapping data created in SetUp. We map offset 3 in the code
150  // to dex pc 3.
151  const uint32_t dex_pc = 3;
152
153  // Create/push fake 16byte stack frame for method g
154  fake_stack.push_back(reinterpret_cast<uintptr_t>(method_g_));
155  fake_stack.push_back(0);
156  fake_stack.push_back(0);
157  fake_stack.push_back(method_f_->ToNativePc(dex_pc));  // return pc
158
159  // Create/push fake 16byte stack frame for method f
160  fake_stack.push_back(reinterpret_cast<uintptr_t>(method_f_));
161  fake_stack.push_back(0);
162  fake_stack.push_back(0);
163  fake_stack.push_back(0xEBAD6070);  // return pc
164
165  // Pull Method* of NULL to terminate the trace
166  fake_stack.push_back(0);
167
168  // Push null values which will become null incoming arguments.
169  fake_stack.push_back(0);
170  fake_stack.push_back(0);
171  fake_stack.push_back(0);
172
173  // Set up thread to appear as if we called out of method_g_ at pc dex 3
174  thread->SetTopOfStack(&fake_stack[0], method_g_->ToNativePc(dex_pc));  // return pc
175#else
176  // Create/push fake 20-byte shadow frame for method g
177  fake_stack.push_back(0);
178  fake_stack.push_back(0);
179  fake_stack.push_back(reinterpret_cast<uintptr_t>(method_g_));
180  fake_stack.push_back(3);
181  fake_stack.push_back(0);
182
183  // Create/push fake 20-byte shadow frame for method f
184  fake_stack.push_back(0);
185  fake_stack.push_back(0);
186  fake_stack.push_back(reinterpret_cast<uintptr_t>(method_f_));
187  fake_stack.push_back(3);
188  fake_stack.push_back(0);
189
190  thread->PushShadowFrame(reinterpret_cast<ShadowFrame*>(&fake_stack[5]));
191  thread->PushShadowFrame(reinterpret_cast<ShadowFrame*>(&fake_stack[0]));
192#endif
193
194  jobject internal = thread->CreateInternalStackTrace(soa);
195  ASSERT_TRUE(internal != NULL);
196  jobjectArray ste_array = Thread::InternalStackTraceToStackTraceElementArray(env, internal);
197  ASSERT_TRUE(ste_array != NULL);
198  mirror::ObjectArray<mirror::StackTraceElement>* trace_array =
199      soa.Decode<mirror::ObjectArray<mirror::StackTraceElement>*>(ste_array);
200
201  ASSERT_TRUE(trace_array != NULL);
202  ASSERT_TRUE(trace_array->Get(0) != NULL);
203  EXPECT_STREQ("ExceptionHandle",
204               trace_array->Get(0)->GetDeclaringClass()->ToModifiedUtf8().c_str());
205  EXPECT_STREQ("ExceptionHandle.java", trace_array->Get(0)->GetFileName()->ToModifiedUtf8().c_str());
206  EXPECT_STREQ("g", trace_array->Get(0)->GetMethodName()->ToModifiedUtf8().c_str());
207  EXPECT_EQ(37, trace_array->Get(0)->GetLineNumber());
208
209  ASSERT_TRUE(trace_array->Get(1) != NULL);
210  EXPECT_STREQ("ExceptionHandle",
211               trace_array->Get(1)->GetDeclaringClass()->ToModifiedUtf8().c_str());
212  EXPECT_STREQ("ExceptionHandle.java", trace_array->Get(1)->GetFileName()->ToModifiedUtf8().c_str());
213  EXPECT_STREQ("f", trace_array->Get(1)->GetMethodName()->ToModifiedUtf8().c_str());
214  EXPECT_EQ(22, trace_array->Get(1)->GetLineNumber());
215
216#if !defined(ART_USE_LLVM_COMPILER)
217  thread->SetTopOfStack(NULL, 0); // Disarm the assertion that no code is running when we detach.
218#else
219  thread->PopShadowFrame();
220  thread->PopShadowFrame();
221#endif
222}
223
224}  // namespace art
225