// 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 "src/vm-state-inl.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, TickSample::kSkipCEntryFrame); } void TraceExtension::Trace(const v8::FunctionCallbackInfo<v8::Value>& args) { i::Isolate* isolate = reinterpret_cast<i::Isolate*>(args.GetIsolate()); i::VMState<EXTERNAL> state(isolate); Address address = reinterpret_cast<Address>( reinterpret_cast<intptr_t>(&TraceExtension::Trace)); i::ExternalCallbackScope call_scope(isolate, address); 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) { i::Isolate* isolate = reinterpret_cast<i::Isolate*>(args.GetIsolate()); i::VMState<EXTERNAL> state(isolate); Address address = reinterpret_cast<Address>( reinterpret_cast<intptr_t>(&TraceExtension::JSTrace)); i::ExternalCallbackScope call_scope(isolate, address); DoTraceHideCEntryFPAddress(GetFP(args)); } Address TraceExtension::GetJsEntrySp() { CHECK(CcTest::i_isolate()->thread_local_top()); return CcTest::i_isolate()->js_entry_sp(); } void TraceExtension::JSEntrySP( const v8::FunctionCallbackInfo<v8::Value>& args) { CHECK(GetJsEntrySp()); } void TraceExtension::JSEntrySPLevel2( const v8::FunctionCallbackInfo<v8::Value>& args) { v8::HandleScope scope(args.GetIsolate()); const Address js_entry_sp = GetJsEntrySp(); CHECK(js_entry_sp); CompileRun("js_entry_sp();"); CHECK_EQ(js_entry_sp, GetJsEntrySp()); } } // namespace internal } // namespace v8