| // Copyright 2014 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "test/cctest/trace-extension.h" |
| |
| #include "src/sampler.h" |
| #include "test/cctest/cctest.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| const char* TraceExtension::kSource = |
| "native function trace();" |
| "native function js_trace();" |
| "native function js_entry_sp();" |
| "native function js_entry_sp_level2();"; |
| |
| |
| v8::Handle<v8::FunctionTemplate> TraceExtension::GetNativeFunctionTemplate( |
| v8::Isolate* isolate, v8::Handle<v8::String> name) { |
| if (name->Equals(v8::String::NewFromUtf8(isolate, "trace"))) { |
| return v8::FunctionTemplate::New(isolate, TraceExtension::Trace); |
| } else if (name->Equals(v8::String::NewFromUtf8(isolate, "js_trace"))) { |
| return v8::FunctionTemplate::New(isolate, TraceExtension::JSTrace); |
| } else if (name->Equals(v8::String::NewFromUtf8(isolate, "js_entry_sp"))) { |
| return v8::FunctionTemplate::New(isolate, TraceExtension::JSEntrySP); |
| } else if (name->Equals(v8::String::NewFromUtf8(isolate, |
| "js_entry_sp_level2"))) { |
| return v8::FunctionTemplate::New(isolate, TraceExtension::JSEntrySPLevel2); |
| } else { |
| CHECK(false); |
| return v8::Handle<v8::FunctionTemplate>(); |
| } |
| } |
| |
| |
| Address TraceExtension::GetFP(const v8::FunctionCallbackInfo<v8::Value>& args) { |
| // Convert frame pointer from encoding as smis in the arguments to a pointer. |
| CHECK_EQ(2, args.Length()); // Ignore second argument on 32-bit platform. |
| #if defined(V8_HOST_ARCH_32_BIT) |
| Address fp = *reinterpret_cast<Address*>(*args[0]); |
| #elif defined(V8_HOST_ARCH_64_BIT) |
| int64_t low_bits = *reinterpret_cast<uint64_t*>(*args[0]) >> 32; |
| int64_t high_bits = *reinterpret_cast<uint64_t*>(*args[1]); |
| Address fp = reinterpret_cast<Address>(high_bits | low_bits); |
| #else |
| #error Host architecture is neither 32-bit nor 64-bit. |
| #endif |
| printf("Trace: %p\n", fp); |
| return fp; |
| } |
| |
| |
| static struct { |
| TickSample* sample; |
| } trace_env = { NULL }; |
| |
| |
| void TraceExtension::InitTraceEnv(TickSample* sample) { |
| trace_env.sample = sample; |
| } |
| |
| |
| void TraceExtension::DoTrace(Address fp) { |
| RegisterState regs; |
| regs.fp = fp; |
| // sp is only used to define stack high bound |
| regs.sp = |
| reinterpret_cast<Address>(trace_env.sample) - 10240; |
| trace_env.sample->Init(CcTest::i_isolate(), regs); |
| } |
| |
| |
| void TraceExtension::Trace(const v8::FunctionCallbackInfo<v8::Value>& args) { |
| DoTrace(GetFP(args)); |
| } |
| |
| |
| // Hide c_entry_fp to emulate situation when sampling is done while |
| // pure JS code is being executed |
| static void DoTraceHideCEntryFPAddress(Address fp) { |
| v8::internal::Address saved_c_frame_fp = |
| *(CcTest::i_isolate()->c_entry_fp_address()); |
| CHECK(saved_c_frame_fp); |
| *(CcTest::i_isolate()->c_entry_fp_address()) = 0; |
| i::TraceExtension::DoTrace(fp); |
| *(CcTest::i_isolate()->c_entry_fp_address()) = saved_c_frame_fp; |
| } |
| |
| |
| void TraceExtension::JSTrace(const v8::FunctionCallbackInfo<v8::Value>& args) { |
| DoTraceHideCEntryFPAddress(GetFP(args)); |
| } |
| |
| |
| Address TraceExtension::GetJsEntrySp() { |
| CHECK_NE(NULL, CcTest::i_isolate()->thread_local_top()); |
| return CcTest::i_isolate()->js_entry_sp(); |
| } |
| |
| |
| void TraceExtension::JSEntrySP( |
| const v8::FunctionCallbackInfo<v8::Value>& args) { |
| CHECK_NE(0, GetJsEntrySp()); |
| } |
| |
| |
| void TraceExtension::JSEntrySPLevel2( |
| const v8::FunctionCallbackInfo<v8::Value>& args) { |
| v8::HandleScope scope(args.GetIsolate()); |
| const Address js_entry_sp = GetJsEntrySp(); |
| CHECK_NE(0, js_entry_sp); |
| CompileRun("js_entry_sp();"); |
| CHECK_EQ(js_entry_sp, GetJsEntrySp()); |
| } |
| |
| |
| } } // namespace v8::internal |