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      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 "gtest/gtest.h"
     23 #include "leb128.h"
     24 #include "mirror/class-inl.h"
     25 #include "mirror/object_array-inl.h"
     26 #include "mirror/object-inl.h"
     27 #include "mirror/stack_trace_element.h"
     28 #include "runtime.h"
     29 #include "scoped_thread_state_change.h"
     30 #include "handle_scope-inl.h"
     31 #include "thread.h"
     32 #include "vmap_table.h"
     33 
     34 namespace art {
     35 
     36 class ExceptionTest : public CommonRuntimeTest {
     37  protected:
     38   virtual void SetUp() {
     39     CommonRuntimeTest::SetUp();
     40 
     41     ScopedObjectAccess soa(Thread::Current());
     42     StackHandleScope<2> hs(soa.Self());
     43     Handle<mirror::ClassLoader> class_loader(
     44         hs.NewHandle(soa.Decode<mirror::ClassLoader*>(LoadDex("ExceptionHandle"))));
     45     my_klass_ = class_linker_->FindClass(soa.Self(), "LExceptionHandle;", class_loader);
     46     ASSERT_TRUE(my_klass_ != NULL);
     47     Handle<mirror::Class> klass(hs.NewHandle(my_klass_));
     48     class_linker_->EnsureInitialized(klass, true, true);
     49     my_klass_ = klass.Get();
     50 
     51     dex_ = my_klass_->GetDexCache()->GetDexFile();
     52 
     53     uint32_t code_size = 12;
     54     for (size_t i = 0 ; i < code_size; i++) {
     55       fake_code_.push_back(0x70 | i);
     56     }
     57 
     58     fake_mapping_data_.PushBackUnsigned(4);  // first element is count
     59     fake_mapping_data_.PushBackUnsigned(4);  // total (non-length) elements
     60     fake_mapping_data_.PushBackUnsigned(2);  // count of pc to dex elements
     61                                       // ---  pc to dex table
     62     fake_mapping_data_.PushBackUnsigned(3 - 0);  // offset 3
     63     fake_mapping_data_.PushBackSigned(3 - 0);    // maps to dex offset 3
     64                                       // ---  dex to pc table
     65     fake_mapping_data_.PushBackUnsigned(3 - 0);  // offset 3
     66     fake_mapping_data_.PushBackSigned(3 - 0);    // maps to dex offset 3
     67 
     68     fake_vmap_table_data_.PushBackUnsigned(0 + VmapTable::kEntryAdjustment);
     69 
     70     fake_gc_map_.push_back(0);  // 0 bytes to encode references and native pc offsets.
     71     fake_gc_map_.push_back(0);
     72     fake_gc_map_.push_back(0);  // 0 entries.
     73     fake_gc_map_.push_back(0);
     74 
     75     const std::vector<uint8_t>& fake_vmap_table_data = fake_vmap_table_data_.GetData();
     76     const std::vector<uint8_t>& fake_mapping_data = fake_mapping_data_.GetData();
     77     uint32_t vmap_table_offset = sizeof(OatQuickMethodHeader) + fake_vmap_table_data.size();
     78     uint32_t mapping_table_offset = vmap_table_offset + fake_mapping_data.size();
     79     OatQuickMethodHeader method_header(mapping_table_offset, vmap_table_offset,
     80                                        4 * kPointerSize, 0u, 0u, code_size);
     81     fake_header_code_and_maps_.resize(sizeof(method_header));
     82     memcpy(&fake_header_code_and_maps_[0], &method_header, sizeof(method_header));
     83     fake_header_code_and_maps_.insert(fake_header_code_and_maps_.begin(),
     84                                       fake_vmap_table_data.begin(), fake_vmap_table_data.end());
     85     fake_header_code_and_maps_.insert(fake_header_code_and_maps_.begin(),
     86                                       fake_mapping_data.begin(), fake_mapping_data.end());
     87     fake_header_code_and_maps_.insert(fake_header_code_and_maps_.end(),
     88                                       fake_code_.begin(), fake_code_.end());
     89 
     90     // NOTE: Don't align the code (it will not be executed) but check that the Thumb2
     91     // adjustment will be a NOP, see ArtMethod::EntryPointToCodePointer().
     92     CHECK_EQ(mapping_table_offset & 1u, 0u);
     93     const uint8_t* code_ptr = &fake_header_code_and_maps_[mapping_table_offset];
     94 
     95     method_f_ = my_klass_->FindVirtualMethod("f", "()I");
     96     ASSERT_TRUE(method_f_ != NULL);
     97     method_f_->SetEntryPointFromQuickCompiledCode(code_ptr);
     98     method_f_->SetNativeGcMap(&fake_gc_map_[0]);
     99 
    100     method_g_ = my_klass_->FindVirtualMethod("g", "(I)V");
    101     ASSERT_TRUE(method_g_ != NULL);
    102     method_g_->SetEntryPointFromQuickCompiledCode(code_ptr);
    103     method_g_->SetNativeGcMap(&fake_gc_map_[0]);
    104   }
    105 
    106   const DexFile* dex_;
    107 
    108   std::vector<uint8_t> fake_code_;
    109   Leb128EncodingVector fake_mapping_data_;
    110   Leb128EncodingVector fake_vmap_table_data_;
    111   std::vector<uint8_t> fake_gc_map_;
    112   std::vector<uint8_t> fake_header_code_and_maps_;
    113 
    114   mirror::ArtMethod* method_f_;
    115   mirror::ArtMethod* method_g_;
    116 
    117  private:
    118   mirror::Class* my_klass_;
    119 };
    120 
    121 TEST_F(ExceptionTest, FindCatchHandler) {
    122   ScopedObjectAccess soa(Thread::Current());
    123   const DexFile::CodeItem* code_item = dex_->GetCodeItem(method_f_->GetCodeItemOffset());
    124 
    125   ASSERT_TRUE(code_item != NULL);
    126 
    127   ASSERT_EQ(2u, code_item->tries_size_);
    128   ASSERT_NE(0u, code_item->insns_size_in_code_units_);
    129 
    130   const DexFile::TryItem *t0, *t1;
    131   t0 = dex_->GetTryItems(*code_item, 0);
    132   t1 = dex_->GetTryItems(*code_item, 1);
    133   EXPECT_LE(t0->start_addr_, t1->start_addr_);
    134   {
    135     CatchHandlerIterator iter(*code_item, 4 /* Dex PC in the first try block */);
    136     EXPECT_STREQ("Ljava/io/IOException;", dex_->StringByTypeIdx(iter.GetHandlerTypeIndex()));
    137     ASSERT_TRUE(iter.HasNext());
    138     iter.Next();
    139     EXPECT_STREQ("Ljava/lang/Exception;", dex_->StringByTypeIdx(iter.GetHandlerTypeIndex()));
    140     ASSERT_TRUE(iter.HasNext());
    141     iter.Next();
    142     EXPECT_FALSE(iter.HasNext());
    143   }
    144   {
    145     CatchHandlerIterator iter(*code_item, 8 /* Dex PC in the second try block */);
    146     EXPECT_STREQ("Ljava/io/IOException;", dex_->StringByTypeIdx(iter.GetHandlerTypeIndex()));
    147     ASSERT_TRUE(iter.HasNext());
    148     iter.Next();
    149     EXPECT_FALSE(iter.HasNext());
    150   }
    151   {
    152     CatchHandlerIterator iter(*code_item, 11 /* Dex PC not in any try block */);
    153     EXPECT_FALSE(iter.HasNext());
    154   }
    155 }
    156 
    157 TEST_F(ExceptionTest, StackTraceElement) {
    158   Thread* thread = Thread::Current();
    159   thread->TransitionFromSuspendedToRunnable();
    160   bool started = runtime_->Start();
    161   CHECK(started);
    162   JNIEnv* env = thread->GetJniEnv();
    163   ScopedObjectAccess soa(env);
    164 
    165   std::vector<uintptr_t> fake_stack;
    166   ASSERT_EQ(kStackAlignment, 16U);
    167   // ASSERT_EQ(sizeof(uintptr_t), sizeof(uint32_t));
    168 
    169   if (!kUsePortableCompiler) {
    170     // Create two fake stack frames with mapping data created in SetUp. We map offset 3 in the code
    171     // to dex pc 3.
    172     const uint32_t dex_pc = 3;
    173 
    174     // Create/push fake 16byte stack frame for method g
    175     fake_stack.push_back(reinterpret_cast<uintptr_t>(method_g_));
    176     fake_stack.push_back(0);
    177     fake_stack.push_back(0);
    178     fake_stack.push_back(method_f_->ToNativePc(dex_pc));  // return pc
    179 
    180     // Create/push fake 16byte stack frame for method f
    181     fake_stack.push_back(reinterpret_cast<uintptr_t>(method_f_));
    182     fake_stack.push_back(0);
    183     fake_stack.push_back(0);
    184     fake_stack.push_back(0xEBAD6070);  // return pc
    185 
    186     // Pull Method* of NULL to terminate the trace
    187     fake_stack.push_back(0);
    188 
    189     // Push null values which will become null incoming arguments.
    190     fake_stack.push_back(0);
    191     fake_stack.push_back(0);
    192     fake_stack.push_back(0);
    193 
    194     // Set up thread to appear as if we called out of method_g_ at pc dex 3
    195     thread->SetTopOfStack(
    196         reinterpret_cast<StackReference<mirror::ArtMethod>*>(&fake_stack[0]),
    197         method_g_->ToNativePc(dex_pc));  // return pc
    198   } else {
    199     // Create/push fake 20-byte shadow frame for method g
    200     fake_stack.push_back(0);
    201     fake_stack.push_back(0);
    202     fake_stack.push_back(reinterpret_cast<uintptr_t>(method_g_));
    203     fake_stack.push_back(3);
    204     fake_stack.push_back(0);
    205 
    206     // Create/push fake 20-byte shadow frame for method f
    207     fake_stack.push_back(0);
    208     fake_stack.push_back(0);
    209     fake_stack.push_back(reinterpret_cast<uintptr_t>(method_f_));
    210     fake_stack.push_back(3);
    211     fake_stack.push_back(0);
    212 
    213     thread->PushShadowFrame(reinterpret_cast<ShadowFrame*>(&fake_stack[5]));
    214     thread->PushShadowFrame(reinterpret_cast<ShadowFrame*>(&fake_stack[0]));
    215   }
    216 
    217   jobject internal = thread->CreateInternalStackTrace<false>(soa);
    218   ASSERT_TRUE(internal != NULL);
    219   jobjectArray ste_array = Thread::InternalStackTraceToStackTraceElementArray(soa, internal);
    220   ASSERT_TRUE(ste_array != NULL);
    221   mirror::ObjectArray<mirror::StackTraceElement>* trace_array =
    222       soa.Decode<mirror::ObjectArray<mirror::StackTraceElement>*>(ste_array);
    223 
    224   ASSERT_TRUE(trace_array != NULL);
    225   ASSERT_TRUE(trace_array->Get(0) != NULL);
    226   EXPECT_STREQ("ExceptionHandle",
    227                trace_array->Get(0)->GetDeclaringClass()->ToModifiedUtf8().c_str());
    228   EXPECT_STREQ("ExceptionHandle.java", trace_array->Get(0)->GetFileName()->ToModifiedUtf8().c_str());
    229   EXPECT_STREQ("g", trace_array->Get(0)->GetMethodName()->ToModifiedUtf8().c_str());
    230   EXPECT_EQ(37, trace_array->Get(0)->GetLineNumber());
    231 
    232   ASSERT_TRUE(trace_array->Get(1) != NULL);
    233   EXPECT_STREQ("ExceptionHandle",
    234                trace_array->Get(1)->GetDeclaringClass()->ToModifiedUtf8().c_str());
    235   EXPECT_STREQ("ExceptionHandle.java", trace_array->Get(1)->GetFileName()->ToModifiedUtf8().c_str());
    236   EXPECT_STREQ("f", trace_array->Get(1)->GetMethodName()->ToModifiedUtf8().c_str());
    237   EXPECT_EQ(22, trace_array->Get(1)->GetLineNumber());
    238 
    239 #if !defined(ART_USE_PORTABLE_COMPILER)
    240   thread->SetTopOfStack(NULL, 0);  // Disarm the assertion that no code is running when we detach.
    241 #else
    242   thread->PopShadowFrame();
    243   thread->PopShadowFrame();
    244 #endif
    245 }
    246 
    247 }  // namespace art
    248