exception_test.cc revision 9837939678bb5dcba178e5fb00ed59b5d14c8d9b 
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 "leb128_encoder.h"
22#include "mirror/class-inl.h"
23#include "mirror/object_array-inl.h"
24#include "mirror/object-inl.h"
25#include "mirror/stack_trace_element.h"
26#include "runtime.h"
27#include "scoped_thread_state_change.h"
28#include "sirt_ref.h"
29#include "thread.h"
30#include "UniquePtr.h"
31
32namespace art {
33
34class ExceptionTest : public CommonTest {
35 protected:
36  virtual void SetUp() {
37    CommonTest::SetUp();
38
39    ScopedObjectAccess soa(Thread::Current());
40    SirtRef<mirror::ClassLoader> class_loader(
41        soa.Self(), soa.Decode<mirror::ClassLoader*>(LoadDex("ExceptionHandle")));
42    my_klass_ = class_linker_->FindClass(soa.Self(), "LExceptionHandle;", class_loader);
43    ASSERT_TRUE(my_klass_ != NULL);
44    SirtRef<mirror::Class> sirt_klass(soa.Self(), my_klass_);
45    class_linker_->EnsureInitialized(sirt_klass, true, true);
46    my_klass_ = sirt_klass.get();
47
48    dex_ = my_klass_->GetDexCache()->GetDexFile();
49
50    uint32_t code_size = 12;
51    fake_code_.push_back((code_size >> 24) & 0xFF);
52    fake_code_.push_back((code_size >> 16) & 0xFF);
53    fake_code_.push_back((code_size >>  8) & 0xFF);
54    fake_code_.push_back((code_size >>  0) & 0xFF);
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);
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    method_f_ = my_klass_->FindVirtualMethod("f", "()I");
77    ASSERT_TRUE(method_f_ != NULL);
78    method_f_->SetFrameSizeInBytes(kStackAlignment);
79    method_f_->SetEntryPointFromQuickCompiledCode(CompiledMethod::CodePointer(&fake_code_[sizeof(code_size)], kThumb2));
80    method_f_->SetMappingTable(&fake_mapping_data_.GetData()[0]);
81    method_f_->SetVmapTable(&fake_vmap_table_data_.GetData()[0]);
82    method_f_->SetNativeGcMap(&fake_gc_map_[0]);
83
84    method_g_ = my_klass_->FindVirtualMethod("g", "(I)V");
85    ASSERT_TRUE(method_g_ != NULL);
86    method_g_->SetFrameSizeInBytes(kStackAlignment);
87    method_g_->SetEntryPointFromQuickCompiledCode(CompiledMethod::CodePointer(&fake_code_[sizeof(code_size)], kThumb2));
88    method_g_->SetMappingTable(&fake_mapping_data_.GetData()[0]);
89    method_g_->SetVmapTable(&fake_vmap_table_data_.GetData()[0]);
90    method_g_->SetNativeGcMap(&fake_gc_map_[0]);
91  }
92
93  const DexFile* dex_;
94
95  std::vector<uint8_t> fake_code_;
96  Leb128EncodingVector fake_mapping_data_;
97  Leb128EncodingVector fake_vmap_table_data_;
98  std::vector<uint8_t> fake_gc_map_;
99
100  mirror::ArtMethod* method_f_;
101  mirror::ArtMethod* method_g_;
102
103 private:
104  mirror::Class* my_klass_;
105};
106
107TEST_F(ExceptionTest, FindCatchHandler) {
108  ScopedObjectAccess soa(Thread::Current());
109  const DexFile::CodeItem* code_item = dex_->GetCodeItem(method_f_->GetCodeItemOffset());
110
111  ASSERT_TRUE(code_item != NULL);
112
113  ASSERT_EQ(2u, code_item->tries_size_);
114  ASSERT_NE(0u, code_item->insns_size_in_code_units_);
115
116  const DexFile::TryItem *t0, *t1;
117  t0 = dex_->GetTryItems(*code_item, 0);
118  t1 = dex_->GetTryItems(*code_item, 1);
119  EXPECT_LE(t0->start_addr_, t1->start_addr_);
120  {
121    CatchHandlerIterator iter(*code_item, 4 /* Dex PC in the first try block */);
122    EXPECT_STREQ("Ljava/io/IOException;", dex_->StringByTypeIdx(iter.GetHandlerTypeIndex()));
123    ASSERT_TRUE(iter.HasNext());
124    iter.Next();
125    EXPECT_STREQ("Ljava/lang/Exception;", dex_->StringByTypeIdx(iter.GetHandlerTypeIndex()));
126    ASSERT_TRUE(iter.HasNext());
127    iter.Next();
128    EXPECT_FALSE(iter.HasNext());
129  }
130  {
131    CatchHandlerIterator iter(*code_item, 8 /* Dex PC in the second try block */);
132    EXPECT_STREQ("Ljava/io/IOException;", dex_->StringByTypeIdx(iter.GetHandlerTypeIndex()));
133    ASSERT_TRUE(iter.HasNext());
134    iter.Next();
135    EXPECT_FALSE(iter.HasNext());
136  }
137  {
138    CatchHandlerIterator iter(*code_item, 11 /* Dex PC not in any try block */);
139    EXPECT_FALSE(iter.HasNext());
140  }
141}
142
143TEST_F(ExceptionTest, StackTraceElement) {
144  Thread* thread = Thread::Current();
145  thread->TransitionFromSuspendedToRunnable();
146  bool started = runtime_->Start();
147  CHECK(started);
148  JNIEnv* env = thread->GetJniEnv();
149  ScopedObjectAccess soa(env);
150
151  std::vector<uintptr_t> fake_stack;
152  ASSERT_EQ(kStackAlignment, 16U);
153  ASSERT_EQ(sizeof(uintptr_t), sizeof(uint32_t));
154
155  if (!kUsePortableCompiler) {
156    // Create two fake stack frames with mapping data created in SetUp. We map offset 3 in the code
157    // to dex pc 3.
158    const uint32_t dex_pc = 3;
159
160    // Create/push fake 16byte stack frame for method g
161    fake_stack.push_back(reinterpret_cast<uintptr_t>(method_g_));
162    fake_stack.push_back(0);
163    fake_stack.push_back(0);
164    fake_stack.push_back(method_f_->ToNativePc(dex_pc));  // return pc
165
166    // Create/push fake 16byte stack frame for method f
167    fake_stack.push_back(reinterpret_cast<uintptr_t>(method_f_));
168    fake_stack.push_back(0);
169    fake_stack.push_back(0);
170    fake_stack.push_back(0xEBAD6070);  // return pc
171
172    // Pull Method* of NULL to terminate the trace
173    fake_stack.push_back(0);
174
175    // Push null values which will become null incoming arguments.
176    fake_stack.push_back(0);
177    fake_stack.push_back(0);
178    fake_stack.push_back(0);
179
180    // Set up thread to appear as if we called out of method_g_ at pc dex 3
181    thread->SetTopOfStack(&fake_stack[0], method_g_->ToNativePc(dex_pc));  // return pc
182  } else {
183    // Create/push fake 20-byte shadow frame for method g
184    fake_stack.push_back(0);
185    fake_stack.push_back(0);
186    fake_stack.push_back(reinterpret_cast<uintptr_t>(method_g_));
187    fake_stack.push_back(3);
188    fake_stack.push_back(0);
189
190    // Create/push fake 20-byte shadow frame for method f
191    fake_stack.push_back(0);
192    fake_stack.push_back(0);
193    fake_stack.push_back(reinterpret_cast<uintptr_t>(method_f_));
194    fake_stack.push_back(3);
195    fake_stack.push_back(0);
196
197    thread->PushShadowFrame(reinterpret_cast<ShadowFrame*>(&fake_stack[5]));
198    thread->PushShadowFrame(reinterpret_cast<ShadowFrame*>(&fake_stack[0]));
199  }
200
201  jobject internal = thread->CreateInternalStackTrace(soa);
202  ASSERT_TRUE(internal != NULL);
203  jobjectArray ste_array = Thread::InternalStackTraceToStackTraceElementArray(env, internal);
204  ASSERT_TRUE(ste_array != NULL);
205  mirror::ObjectArray<mirror::StackTraceElement>* trace_array =
206      soa.Decode<mirror::ObjectArray<mirror::StackTraceElement>*>(ste_array);
207
208  ASSERT_TRUE(trace_array != NULL);
209  ASSERT_TRUE(trace_array->Get(0) != NULL);
210  EXPECT_STREQ("ExceptionHandle",
211               trace_array->Get(0)->GetDeclaringClass()->ToModifiedUtf8().c_str());
212  EXPECT_STREQ("ExceptionHandle.java", trace_array->Get(0)->GetFileName()->ToModifiedUtf8().c_str());
213  EXPECT_STREQ("g", trace_array->Get(0)->GetMethodName()->ToModifiedUtf8().c_str());
214  EXPECT_EQ(37, trace_array->Get(0)->GetLineNumber());
215
216  ASSERT_TRUE(trace_array->Get(1) != NULL);
217  EXPECT_STREQ("ExceptionHandle",
218               trace_array->Get(1)->GetDeclaringClass()->ToModifiedUtf8().c_str());
219  EXPECT_STREQ("ExceptionHandle.java", trace_array->Get(1)->GetFileName()->ToModifiedUtf8().c_str());
220  EXPECT_STREQ("f", trace_array->Get(1)->GetMethodName()->ToModifiedUtf8().c_str());
221  EXPECT_EQ(22, trace_array->Get(1)->GetLineNumber());
222
223#if !defined(ART_USE_PORTABLE_COMPILER)
224  thread->SetTopOfStack(NULL, 0);  // Disarm the assertion that no code is running when we detach.
225#else
226  thread->PopShadowFrame();
227  thread->PopShadowFrame();
228#endif
229}
230
231}  // namespace art
232