Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1 | // Copyright 2014 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #include "test/cctest/trace-extension.h" |
| 29 | |
| 30 | #include "src/sampler.h" |
| 31 | #include "test/cctest/cctest.h" |
| 32 | |
| 33 | namespace v8 { |
| 34 | namespace internal { |
| 35 | |
| 36 | const char* TraceExtension::kSource = |
| 37 | "native function trace();" |
| 38 | "native function js_trace();" |
| 39 | "native function js_entry_sp();" |
| 40 | "native function js_entry_sp_level2();"; |
| 41 | |
| 42 | |
| 43 | v8::Handle<v8::FunctionTemplate> TraceExtension::GetNativeFunctionTemplate( |
| 44 | v8::Isolate* isolate, v8::Handle<v8::String> name) { |
| 45 | if (name->Equals(v8::String::NewFromUtf8(isolate, "trace"))) { |
| 46 | return v8::FunctionTemplate::New(isolate, TraceExtension::Trace); |
| 47 | } else if (name->Equals(v8::String::NewFromUtf8(isolate, "js_trace"))) { |
| 48 | return v8::FunctionTemplate::New(isolate, TraceExtension::JSTrace); |
| 49 | } else if (name->Equals(v8::String::NewFromUtf8(isolate, "js_entry_sp"))) { |
| 50 | return v8::FunctionTemplate::New(isolate, TraceExtension::JSEntrySP); |
| 51 | } else if (name->Equals(v8::String::NewFromUtf8(isolate, |
| 52 | "js_entry_sp_level2"))) { |
| 53 | return v8::FunctionTemplate::New(isolate, TraceExtension::JSEntrySPLevel2); |
| 54 | } else { |
| 55 | CHECK(false); |
| 56 | return v8::Handle<v8::FunctionTemplate>(); |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | |
| 61 | Address TraceExtension::GetFP(const v8::FunctionCallbackInfo<v8::Value>& args) { |
| 62 | // Convert frame pointer from encoding as smis in the arguments to a pointer. |
| 63 | CHECK_EQ(2, args.Length()); // Ignore second argument on 32-bit platform. |
| 64 | #if defined(V8_HOST_ARCH_32_BIT) |
| 65 | Address fp = *reinterpret_cast<Address*>(*args[0]); |
| 66 | #elif defined(V8_HOST_ARCH_64_BIT) |
| 67 | int64_t low_bits = *reinterpret_cast<uint64_t*>(*args[0]) >> 32; |
| 68 | int64_t high_bits = *reinterpret_cast<uint64_t*>(*args[1]); |
| 69 | Address fp = reinterpret_cast<Address>(high_bits | low_bits); |
| 70 | #else |
| 71 | #error Host architecture is neither 32-bit nor 64-bit. |
| 72 | #endif |
| 73 | printf("Trace: %p\n", fp); |
| 74 | return fp; |
| 75 | } |
| 76 | |
| 77 | |
| 78 | static struct { |
| 79 | TickSample* sample; |
| 80 | } trace_env = { NULL }; |
| 81 | |
| 82 | |
| 83 | void TraceExtension::InitTraceEnv(TickSample* sample) { |
| 84 | trace_env.sample = sample; |
| 85 | } |
| 86 | |
| 87 | |
| 88 | void TraceExtension::DoTrace(Address fp) { |
| 89 | RegisterState regs; |
| 90 | regs.fp = fp; |
| 91 | // sp is only used to define stack high bound |
| 92 | regs.sp = |
| 93 | reinterpret_cast<Address>(trace_env.sample) - 10240; |
| 94 | trace_env.sample->Init(CcTest::i_isolate(), regs); |
| 95 | } |
| 96 | |
| 97 | |
| 98 | void TraceExtension::Trace(const v8::FunctionCallbackInfo<v8::Value>& args) { |
| 99 | DoTrace(GetFP(args)); |
| 100 | } |
| 101 | |
| 102 | |
| 103 | // Hide c_entry_fp to emulate situation when sampling is done while |
| 104 | // pure JS code is being executed |
| 105 | static void DoTraceHideCEntryFPAddress(Address fp) { |
| 106 | v8::internal::Address saved_c_frame_fp = |
| 107 | *(CcTest::i_isolate()->c_entry_fp_address()); |
| 108 | CHECK(saved_c_frame_fp); |
| 109 | *(CcTest::i_isolate()->c_entry_fp_address()) = 0; |
| 110 | i::TraceExtension::DoTrace(fp); |
| 111 | *(CcTest::i_isolate()->c_entry_fp_address()) = saved_c_frame_fp; |
| 112 | } |
| 113 | |
| 114 | |
| 115 | void TraceExtension::JSTrace(const v8::FunctionCallbackInfo<v8::Value>& args) { |
| 116 | DoTraceHideCEntryFPAddress(GetFP(args)); |
| 117 | } |
| 118 | |
| 119 | |
| 120 | Address TraceExtension::GetJsEntrySp() { |
| 121 | CHECK_NE(NULL, CcTest::i_isolate()->thread_local_top()); |
| 122 | return CcTest::i_isolate()->js_entry_sp(); |
| 123 | } |
| 124 | |
| 125 | |
| 126 | void TraceExtension::JSEntrySP( |
| 127 | const v8::FunctionCallbackInfo<v8::Value>& args) { |
| 128 | CHECK_NE(0, GetJsEntrySp()); |
| 129 | } |
| 130 | |
| 131 | |
| 132 | void TraceExtension::JSEntrySPLevel2( |
| 133 | const v8::FunctionCallbackInfo<v8::Value>& args) { |
| 134 | v8::HandleScope scope(args.GetIsolate()); |
| 135 | const Address js_entry_sp = GetJsEntrySp(); |
| 136 | CHECK_NE(0, js_entry_sp); |
| 137 | CompileRun("js_entry_sp();"); |
| 138 | CHECK_EQ(js_entry_sp, GetJsEntrySp()); |
| 139 | } |
| 140 | |
| 141 | |
| 142 | } } // namespace v8::internal |