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v8/test/cctest/wasm/wasm-run-utils.h
ahaas 98fa962e5f [wasm] Turn on trap-if by default. 
This CL turns on trap-if by default, and it changes the tests so that
traps in the cctests are also tested without trap-if.

R=titzer@chromium.org, clemensh@chromium.org, bradnelson@chromium.org

Review-Url: https://codereview.chromium.org/2647323002
Cr-Original-Commit-Position: refs/heads/master@{#42603}
Committed: 01c87ebe70
Review-Url: https://codereview.chromium.org/2647323002
Cr-Commit-Position: refs/heads/master@{#42688}
2017-01-26 11:29:23 +00:00

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// Copyright 2016 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef WASM_RUN_UTILS_H
#define WASM_RUN_UTILS_H
#include <setjmp.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <array>
#include <memory>
#include "src/base/utils/random-number-generator.h"
#include "src/zone/accounting-allocator.h"
#include "src/compiler/compiler-source-position-table.h"
#include "src/compiler/graph-visualizer.h"
#include "src/compiler/int64-lowering.h"
#include "src/compiler/js-graph.h"
#include "src/compiler/node.h"
#include "src/compiler/pipeline.h"
#include "src/compiler/wasm-compiler.h"
#include "src/compiler/zone-stats.h"
#include "src/wasm/function-body-decoder.h"
#include "src/wasm/wasm-external-refs.h"
#include "src/wasm/wasm-interpreter.h"
#include "src/wasm/wasm-js.h"
#include "src/wasm/wasm-macro-gen.h"
#include "src/wasm/wasm-module.h"
#include "src/wasm/wasm-objects.h"
#include "src/wasm/wasm-opcodes.h"
#include "src/zone/zone.h"
#include "test/cctest/cctest.h"
#include "test/cctest/compiler/call-tester.h"
#include "test/cctest/compiler/graph-builder-tester.h"
static const uint32_t kMaxFunctions = 10;
enum WasmExecutionMode { kExecuteInterpreted, kExecuteCompiled };
// TODO(titzer): check traps more robustly in tests.
// Currently, in tests, we just return 0xdeadbeef from the function in which
// the trap occurs if the runtime context is not available to throw a JavaScript
// exception.
#define CHECK_TRAP32(x) \
CHECK_EQ(0xdeadbeef, (bit_cast<uint32_t>(x)) & 0xFFFFFFFF)
#define CHECK_TRAP64(x) \
CHECK_EQ(0xdeadbeefdeadbeef, (bit_cast<uint64_t>(x)) & 0xFFFFFFFFFFFFFFFF)
#define CHECK_TRAP(x) CHECK_TRAP32(x)
#define WASM_WRAPPER_RETURN_VALUE 8754
#define BUILD(r, ...) \
do { \
byte code[] = {__VA_ARGS__}; \
r.Build(code, code + arraysize(code)); \
} while (false)
namespace {
using namespace v8::base;
using namespace v8::internal;
using namespace v8::internal::compiler;
using namespace v8::internal::wasm;
const uint32_t kMaxGlobalsSize = 128;
// A helper for module environments that adds the ability to allocate memory
// and global variables. Contains a built-in {WasmModule} and
// {WasmInstance}.
class TestingModule : public ModuleEnv {
public:
explicit TestingModule(Zone* zone, WasmExecutionMode mode = kExecuteCompiled)
: ModuleEnv(&module_, &instance_),
execution_mode_(mode),
instance_(&module_),
isolate_(CcTest::InitIsolateOnce()),
global_offset(0),
interpreter_(mode == kExecuteInterpreted
? new WasmInterpreter(
ModuleBytesEnv(&module_, &instance_,
Vector<const byte>::empty()),
zone->allocator())
: nullptr) {
WasmJs::Install(isolate_);
instance->module = &module_;
instance->globals_start = global_data;
module_.globals_size = kMaxGlobalsSize;
instance->mem_start = nullptr;
instance->mem_size = 0;
memset(global_data, 0, sizeof(global_data));
instance_object_ = InitInstanceObject();
}
~TestingModule() {
if (instance->mem_start) {
free(instance->mem_start);
}
if (interpreter_) delete interpreter_;
}
void ChangeOriginToAsmjs() { module_.origin = kAsmJsOrigin; }
byte* AddMemory(uint32_t size) {
CHECK(!module_.has_memory);
CHECK_NULL(instance->mem_start);
CHECK_EQ(0, instance->mem_size);
module_.has_memory = true;
instance->mem_start = reinterpret_cast<byte*>(malloc(size));
CHECK(instance->mem_start);
memset(instance->mem_start, 0, size);
instance->mem_size = size;
return raw_mem_start<byte>();
}
template <typename T>
T* AddMemoryElems(uint32_t count) {
AddMemory(count * sizeof(T));
return raw_mem_start<T>();
}
template <typename T>
T* AddGlobal(
ValueType type = WasmOpcodes::ValueTypeFor(MachineTypeForC<T>())) {
const WasmGlobal* global = AddGlobal(type);
return reinterpret_cast<T*>(instance->globals_start + global->offset);
}
byte AddSignature(FunctionSig* sig) {
module_.signatures.push_back(sig);
size_t size = module->signatures.size();
CHECK(size < 127);
return static_cast<byte>(size - 1);
}
template <typename T>
T* raw_mem_start() {
DCHECK(instance->mem_start);
return reinterpret_cast<T*>(instance->mem_start);
}
template <typename T>
T* raw_mem_end() {
DCHECK(instance->mem_start);
return reinterpret_cast<T*>(instance->mem_start + instance->mem_size);
}
template <typename T>
T raw_mem_at(int i) {
DCHECK(instance->mem_start);
return ReadMemory(&(reinterpret_cast<T*>(instance->mem_start)[i]));
}
template <typename T>
T raw_val_at(int i) {
return ReadMemory(reinterpret_cast<T*>(instance->mem_start + i));
}
template <typename T>
void WriteMemory(T* p, T val) {
WriteLittleEndianValue<T>(p, val);
}
template <typename T>
T ReadMemory(T* p) {
return ReadLittleEndianValue<T>(p);
}
// Zero-initialize the memory.
void BlankMemory() {
byte* raw = raw_mem_start<byte>();
memset(raw, 0, instance->mem_size);
}
// Pseudo-randomly intialize the memory.
void RandomizeMemory(unsigned int seed = 88) {
byte* raw = raw_mem_start<byte>();
byte* end = raw_mem_end<byte>();
v8::base::RandomNumberGenerator rng;
rng.SetSeed(seed);
rng.NextBytes(raw, end - raw);
}
void SetMaxMemPages(uint32_t max_mem_pages) {
module_.max_mem_pages = max_mem_pages;
}
uint32_t AddFunction(FunctionSig* sig, Handle<Code> code, const char* name) {
if (module->functions.size() == 0) {
// TODO(titzer): Reserving space here to avoid the underlying WasmFunction
// structs from moving.
module_.functions.reserve(kMaxFunctions);
}
uint32_t index = static_cast<uint32_t>(module->functions.size());
module_.functions.push_back({sig, index, 0, 0, 0, 0, 0, false, false});
if (name) {
Vector<const byte> name_vec = Vector<const byte>::cast(CStrVector(name));
module_.functions.back().name_offset = AddBytes(name_vec);
module_.functions.back().name_length = name_vec.length();
}
instance->function_code.push_back(code);
if (interpreter_) {
const WasmFunction* function = &module->functions.back();
int interpreter_index = interpreter_->AddFunctionForTesting(function);
CHECK_EQ(index, static_cast<uint32_t>(interpreter_index));
}
DCHECK_LT(index, kMaxFunctions); // limited for testing.
return index;
}
uint32_t AddJsFunction(FunctionSig* sig, const char* source) {
Handle<JSFunction> jsfunc = Handle<JSFunction>::cast(v8::Utils::OpenHandle(
*v8::Local<v8::Function>::Cast(CompileRun(source))));
uint32_t index = AddFunction(sig, Handle<Code>::null(), nullptr);
Handle<Code> code = CompileWasmToJSWrapper(
isolate_, jsfunc, sig, index, Handle<String>::null(),
Handle<String>::null(), module->origin);
instance->function_code[index] = code;
return index;
}
Handle<JSFunction> WrapCode(uint32_t index) {
// Wrap the code so it can be called as a JS function.
Handle<Code> code = instance->function_code[index];
Handle<Code> ret_code =
compiler::CompileJSToWasmWrapper(isolate_, &module_, code, index);
Handle<JSFunction> ret = WasmExportedFunction::New(
isolate_, instance_object(), MaybeHandle<String>(),
static_cast<int>(index),
static_cast<int>(this->module->functions[index].sig->parameter_count()),
ret_code);
// Add weak reference to exported functions.
Handle<WasmCompiledModule> compiled_module(
instance_object()->compiled_module(), isolate_);
Handle<FixedArray> old_arr = compiled_module->weak_exported_functions();
Handle<FixedArray> new_arr =
isolate_->factory()->NewFixedArray(old_arr->length() + 1);
old_arr->CopyTo(0, *new_arr, 0, old_arr->length());
Handle<WeakCell> weak_fn = isolate_->factory()->NewWeakCell(ret);
new_arr->set(old_arr->length(), *weak_fn);
compiled_module->set_weak_exported_functions(new_arr);
return ret;
}
void SetFunctionCode(uint32_t index, Handle<Code> code) {
instance->function_code[index] = code;
}
void AddIndirectFunctionTable(uint16_t* function_indexes,
uint32_t table_size) {
module_.function_tables.push_back({table_size, table_size, true,
std::vector<int32_t>(), false, false,
SignatureMap()});
WasmIndirectFunctionTable& table = module_.function_tables.back();
table.min_size = table_size;
table.max_size = table_size;
for (uint32_t i = 0; i < table_size; ++i) {
table.values.push_back(function_indexes[i]);
table.map.FindOrInsert(module_.functions[function_indexes[i]].sig);
}
instance->function_tables.push_back(
isolate_->factory()->NewFixedArray(table_size));
instance->signature_tables.push_back(
isolate_->factory()->NewFixedArray(table_size));
}
void PopulateIndirectFunctionTable() {
if (execution_mode_ == kExecuteInterpreted) return;
// Initialize the fixed arrays in instance->function_tables.
for (uint32_t i = 0; i < instance->function_tables.size(); i++) {
WasmIndirectFunctionTable& table = module_.function_tables[i];
Handle<FixedArray> function_table = instance->function_tables[i];
Handle<FixedArray> signature_table = instance->signature_tables[i];
int table_size = static_cast<int>(table.values.size());
for (int j = 0; j < table_size; j++) {
WasmFunction& function = module_.functions[table.values[j]];
signature_table->set(j, Smi::FromInt(table.map.Find(function.sig)));
function_table->set(j, *instance->function_code[function.func_index]);
}
}
}
uint32_t AddBytes(Vector<const byte> bytes) {
Handle<SeqOneByteString> old_bytes(
instance_object_->compiled_module()->module_bytes(), isolate_);
uint32_t old_size = static_cast<uint32_t>(old_bytes->length());
ScopedVector<byte> new_bytes(old_size + bytes.length());
memcpy(new_bytes.start(), old_bytes->GetChars(), old_size);
memcpy(new_bytes.start() + old_size, bytes.start(), bytes.length());
Handle<SeqOneByteString> new_bytes_str = Handle<SeqOneByteString>::cast(
isolate_->factory()->NewStringFromOneByte(new_bytes).ToHandleChecked());
instance_object_->compiled_module()->shared()->set_module_bytes(
*new_bytes_str);
return old_size;
}
WasmFunction* GetFunctionAt(int index) { return &module_.functions[index]; }
WasmInterpreter* interpreter() { return interpreter_; }
WasmExecutionMode execution_mode() { return execution_mode_; }
Isolate* isolate() { return isolate_; }
Handle<WasmInstanceObject> instance_object() { return instance_object_; }
private:
WasmExecutionMode execution_mode_;
WasmModule module_;
WasmInstance instance_;
Isolate* isolate_;
uint32_t global_offset;
V8_ALIGNED(8) byte global_data[kMaxGlobalsSize]; // preallocated global data.
WasmInterpreter* interpreter_;
Handle<WasmInstanceObject> instance_object_;
const WasmGlobal* AddGlobal(ValueType type) {
byte size = WasmOpcodes::MemSize(WasmOpcodes::MachineTypeFor(type));
global_offset = (global_offset + size - 1) & ~(size - 1); // align
module_.globals.push_back(
{type, true, WasmInitExpr(), global_offset, false, false});
global_offset += size;
// limit number of globals.
CHECK_LT(global_offset, kMaxGlobalsSize);
return &module->globals.back();
}
Handle<WasmInstanceObject> InitInstanceObject() {
Handle<SeqOneByteString> empty_string = Handle<SeqOneByteString>::cast(
isolate_->factory()->NewStringFromOneByte({}).ToHandleChecked());
Handle<Managed<wasm::WasmModule>> module_wrapper =
Managed<wasm::WasmModule>::New(isolate_, &module_, false);
Handle<Script> script =
isolate_->factory()->NewScript(isolate_->factory()->empty_string());
script->set_type(Script::TYPE_WASM);
Handle<WasmSharedModuleData> shared_module_data =
WasmSharedModuleData::New(isolate_, module_wrapper, empty_string,
script, Handle<ByteArray>::null());
Handle<WasmCompiledModule> compiled_module =
WasmCompiledModule::New(isolate_, shared_module_data);
// Minimally initialize the compiled module such that IsWasmCompiledModule
// passes.
// If tests need more (correct) information, add it later.
compiled_module->set_min_mem_pages(0);
compiled_module->set_max_mem_pages(Smi::kMaxValue);
Handle<FixedArray> code_table = isolate_->factory()->NewFixedArray(0);
compiled_module->set_code_table(code_table);
Handle<FixedArray> weak_exported = isolate_->factory()->NewFixedArray(0);
compiled_module->set_weak_exported_functions(weak_exported);
DCHECK(WasmCompiledModule::IsWasmCompiledModule(*compiled_module));
return WasmInstanceObject::New(isolate_, compiled_module);
}
};
inline void TestBuildingGraph(Zone* zone, JSGraph* jsgraph, ModuleEnv* module,
FunctionSig* sig,
SourcePositionTable* source_position_table,
const byte* start, const byte* end) {
compiler::WasmGraphBuilder builder(module, zone, jsgraph, sig,
source_position_table);
DecodeResult result =
BuildTFGraph(zone->allocator(), &builder, sig, start, end);
if (result.failed()) {
if (!FLAG_trace_wasm_decoder) {
// Retry the compilation with the tracing flag on, to help in debugging.
FLAG_trace_wasm_decoder = true;
result = BuildTFGraph(zone->allocator(), &builder, sig, start, end);
}
ptrdiff_t pc = result.error_pc - result.start;
ptrdiff_t pt = result.error_pt - result.start;
std::ostringstream str;
str << "Verification failed: " << result.error_code << " pc = +" << pc;
if (result.error_pt) str << ", pt = +" << pt;
str << ", msg = " << result.error_msg.get();
FATAL(str.str().c_str());
}
builder.Int64LoweringForTesting();
if (!CpuFeatures::SupportsSimd128()) {
builder.SimdScalarLoweringForTesting();
}
}
class WasmFunctionWrapper : private GraphAndBuilders {
public:
explicit WasmFunctionWrapper(Zone* zone, int num_params)
: GraphAndBuilders(zone), inner_code_node_(nullptr), signature_(nullptr) {
// One additional parameter for the pointer to the return value memory.
Signature<MachineType>::Builder sig_builder(zone, 1, num_params + 1);
sig_builder.AddReturn(MachineType::Int32());
for (int i = 0; i < num_params + 1; i++) {
sig_builder.AddParam(MachineType::Pointer());
}
signature_ = sig_builder.Build();
}
void Init(CallDescriptor* descriptor, MachineType return_type,
Vector<MachineType> param_types) {
DCHECK_NOT_NULL(descriptor);
DCHECK_EQ(signature_->parameter_count(), param_types.length() + 1);
// Create the TF graph for the wrapper.
// Function, effect, and control.
Node** parameters = zone()->NewArray<Node*>(param_types.length() + 3);
graph()->SetStart(graph()->NewNode(common()->Start(6)));
Node* effect = graph()->start();
int parameter_count = 0;
// Dummy node which gets replaced in SetInnerCode.
inner_code_node_ = graph()->NewNode(common()->Int32Constant(0));
parameters[parameter_count++] = inner_code_node_;
int param_idx = 0;
for (MachineType t : param_types) {
DCHECK_NE(MachineType::None(), t);
parameters[parameter_count] = graph()->NewNode(
machine()->Load(t),
graph()->NewNode(common()->Parameter(param_idx++), graph()->start()),
graph()->NewNode(common()->Int32Constant(0)), effect,
graph()->start());
effect = parameters[parameter_count++];
}
parameters[parameter_count++] = effect;
parameters[parameter_count++] = graph()->start();
Node* call = graph()->NewNode(common()->Call(descriptor), parameter_count,
parameters);
if (!return_type.IsNone()) {
effect = graph()->NewNode(
machine()->Store(StoreRepresentation(
return_type.representation(), WriteBarrierKind::kNoWriteBarrier)),
graph()->NewNode(common()->Parameter(param_types.length()),
graph()->start()),
graph()->NewNode(common()->Int32Constant(0)), call, effect,
graph()->start());
}
Node* zero = graph()->NewNode(common()->Int32Constant(0));
Node* r = graph()->NewNode(
common()->Return(), zero,
graph()->NewNode(common()->Int32Constant(WASM_WRAPPER_RETURN_VALUE)),
effect, graph()->start());
graph()->SetEnd(graph()->NewNode(common()->End(2), r, graph()->start()));
}
template <typename ReturnType, typename... ParamTypes>
void Init(CallDescriptor* descriptor) {
std::array<MachineType, sizeof...(ParamTypes)> param_machine_types{
{MachineTypeForC<ParamTypes>()...}};
Vector<MachineType> param_vec(param_machine_types.data(),
param_machine_types.size());
Init(descriptor, MachineTypeForC<ReturnType>(), param_vec);
}
void SetInnerCode(Handle<Code> code_handle) {
NodeProperties::ChangeOp(inner_code_node_,
common()->HeapConstant(code_handle));
}
Handle<Code> GetWrapperCode() {
if (code_.is_null()) {
Isolate* isolate = CcTest::InitIsolateOnce();
CallDescriptor* descriptor =
Linkage::GetSimplifiedCDescriptor(zone(), signature_, true);
if (kPointerSize == 4) {
size_t num_params = signature_->parameter_count();
// One additional parameter for the pointer of the return value.
Signature<MachineRepresentation>::Builder rep_builder(zone(), 1,
num_params + 1);
rep_builder.AddReturn(MachineRepresentation::kWord32);
for (size_t i = 0; i < num_params + 1; i++) {
rep_builder.AddParam(MachineRepresentation::kWord32);
}
Int64Lowering r(graph(), machine(), common(), zone(),
rep_builder.Build());
r.LowerGraph();
}
CompilationInfo info(ArrayVector("testing"), isolate, graph()->zone(),
Code::ComputeFlags(Code::STUB));
code_ =
Pipeline::GenerateCodeForTesting(&info, descriptor, graph(), nullptr);
CHECK(!code_.is_null());
#ifdef ENABLE_DISASSEMBLER
if (FLAG_print_opt_code) {
OFStream os(stdout);
code_->Disassemble("wasm wrapper", os);
}
#endif
}
return code_;
}
Signature<MachineType>* signature() const { return signature_; }
private:
Node* inner_code_node_;
Handle<Code> code_;
Signature<MachineType>* signature_;
};
// A helper for compiling WASM functions for testing.
// It contains the internal state for compilation (i.e. TurboFan graph) and
// interpretation (by adding to the interpreter manually).
class WasmFunctionCompiler : private GraphAndBuilders {
public:
Isolate* isolate() { return testing_module_->isolate(); }
Graph* graph() const { return main_graph_; }
Zone* zone() const { return graph()->zone(); }
CommonOperatorBuilder* common() { return &main_common_; }
MachineOperatorBuilder* machine() { return &main_machine_; }
CallDescriptor* descriptor() {
if (descriptor_ == nullptr) {
descriptor_ = testing_module_->GetWasmCallDescriptor(zone(), sig);
}
return descriptor_;
}
uint32_t function_index() { return function_->func_index; }
void Build(const byte* start, const byte* end) {
size_t locals_size = local_decls.Size();
size_t total_size = end - start + locals_size + 1;
byte* buffer = static_cast<byte*>(zone()->New(total_size));
// Prepend the local decls to the code.
local_decls.Emit(buffer);
// Emit the code.
memcpy(buffer + locals_size, start, end - start);
// Append an extra end opcode.
buffer[total_size - 1] = kExprEnd;
start = buffer;
end = buffer + total_size;
CHECK_GE(kMaxInt, end - start);
int len = static_cast<int>(end - start);
function_->code_start_offset =
testing_module_->AddBytes(Vector<const byte>(start, len));
function_->code_end_offset = function_->code_start_offset + len;
if (interpreter_) {
// Add the code to the interpreter.
CHECK(interpreter_->SetFunctionCodeForTesting(function_, start, end));
return;
}
// Build the TurboFan graph.
TestBuildingGraph(zone(), &jsgraph, testing_module_, sig,
&source_position_table_, start, end);
Handle<Code> code = Compile();
testing_module_->SetFunctionCode(function_index(), code);
// Add to code table.
Handle<WasmCompiledModule> compiled_module(
testing_module_->instance_object()->compiled_module(), isolate());
Handle<FixedArray> code_table = compiled_module->code_table();
code_table = FixedArray::SetAndGrow(code_table, function_index(), code);
compiled_module->set_code_table(code_table);
}
byte AllocateLocal(ValueType type) {
uint32_t index = local_decls.AddLocals(1, type);
byte result = static_cast<byte>(index);
DCHECK_EQ(index, result);
return result;
}
void SetSigIndex(int sig_index) { function_->sig_index = sig_index; }
private:
friend class WasmRunnerBase;
explicit WasmFunctionCompiler(Zone* zone, FunctionSig* sig,
TestingModule* module, const char* name)
: GraphAndBuilders(zone),
jsgraph(module->isolate(), this->graph(), this->common(), nullptr,
nullptr, this->machine()),
sig(sig),
descriptor_(nullptr),
testing_module_(module),
local_decls(zone, sig),
source_position_table_(this->graph()),
interpreter_(module->interpreter()) {
// Get a new function from the testing module.
int index = module->AddFunction(sig, Handle<Code>::null(), name);
function_ = testing_module_->GetFunctionAt(index);
}
Handle<Code> Compile() {
CallDescriptor* desc = descriptor();
if (kPointerSize == 4) {
desc = testing_module_->GetI32WasmCallDescriptor(this->zone(), desc);
}
CompilationInfo info(CStrVector("wasm"), this->isolate(), this->zone(),
Code::ComputeFlags(Code::WASM_FUNCTION));
std::unique_ptr<CompilationJob> job(Pipeline::NewWasmCompilationJob(
&info, &jsgraph, desc, &source_position_table_, nullptr));
if (job->ExecuteJob() != CompilationJob::SUCCEEDED ||
job->FinalizeJob() != CompilationJob::SUCCEEDED)
return Handle<Code>::null();
Handle<Code> code = info.code();
// Deopt data holds <WeakCell<wasm_instance>, func_index>.
DCHECK(code->deoptimization_data() == nullptr ||
code->deoptimization_data()->length() == 0);
Handle<FixedArray> deopt_data =
isolate()->factory()->NewFixedArray(2, TENURED);
Handle<Object> weak_instance =
isolate()->factory()->NewWeakCell(testing_module_->instance_object());
deopt_data->set(0, *weak_instance);
deopt_data->set(1, Smi::FromInt(static_cast<int>(function_index())));
deopt_data->set_length(2);
code->set_deoptimization_data(*deopt_data);
#ifdef ENABLE_DISASSEMBLER
if (FLAG_print_opt_code) {
OFStream os(stdout);
code->Disassemble("wasm code", os);
}
#endif
return code;
}
JSGraph jsgraph;
FunctionSig* sig;
// The call descriptor is initialized when the function is compiled.
CallDescriptor* descriptor_;
TestingModule* testing_module_;
Vector<const char> debug_name_;
WasmFunction* function_;
LocalDeclEncoder local_decls;
SourcePositionTable source_position_table_;
WasmInterpreter* interpreter_;
};
// A helper class to build a module around Wasm bytecode, generate machine
// code, and run that code.
class WasmRunnerBase : public HandleAndZoneScope {
public:
explicit WasmRunnerBase(WasmExecutionMode execution_mode, int num_params)
: zone_(&allocator_, ZONE_NAME),
module_(&zone_, execution_mode),
wrapper_(&zone_, num_params) {}
// Builds a graph from the given Wasm code and generates the machine
// code and call wrapper for that graph. This method must not be called
// more than once.
void Build(const byte* start, const byte* end) {
CHECK(!compiled_);
compiled_ = true;
functions_[0]->Build(start, end);
}
// Resets the state for building the next function.
// The main function called will always be the first function.
template <typename ReturnType, typename... ParamTypes>
WasmFunctionCompiler& NewFunction(const char* name = nullptr) {
return NewFunction(CreateSig<ReturnType, ParamTypes...>(), name);
}
// Resets the state for building the next function.
// The main function called will be the last generated function.
// Returns the index of the previously built function.
WasmFunctionCompiler& NewFunction(FunctionSig* sig,
const char* name = nullptr) {
functions_.emplace_back(
new WasmFunctionCompiler(&zone_, sig, &module_, name));
return *functions_.back();
}
byte AllocateLocal(ValueType type) {
return functions_[0]->AllocateLocal(type);
}
uint32_t function_index() { return functions_[0]->function_index(); }
WasmFunction* function() { return functions_[0]->function_; }
WasmInterpreter* interpreter() { return functions_[0]->interpreter_; }
bool possible_nondeterminism() { return possible_nondeterminism_; }
TestingModule& module() { return module_; }
Zone* zone() { return &zone_; }
// Set the context, such that e.g. runtime functions can be called.
void SetModuleContext() {
if (!module_.instance->context.is_null()) {
CHECK(module_.instance->context.is_identical_to(
main_isolate()->native_context()));
return;
}
module_.instance->context = main_isolate()->native_context();
}
private:
FunctionSig* CreateSig(MachineType return_type,
Vector<MachineType> param_types) {
int return_count = return_type.IsNone() ? 0 : 1;
int param_count = param_types.length();
// Allocate storage array in zone.
ValueType* sig_types =
zone_.NewArray<ValueType>(return_count + param_count);
// Convert machine types to local types, and check that there are no
// MachineType::None()'s in the parameters.
int idx = 0;
if (return_count) sig_types[idx++] = WasmOpcodes::ValueTypeFor(return_type);
for (MachineType param : param_types) {
CHECK_NE(MachineType::None(), param);
sig_types[idx++] = WasmOpcodes::ValueTypeFor(param);
}
return new (&zone_) FunctionSig(return_count, param_count, sig_types);
}
template <typename ReturnType, typename... ParamTypes>
FunctionSig* CreateSig() {
std::array<MachineType, sizeof...(ParamTypes)> param_machine_types{
{MachineTypeForC<ParamTypes>()...}};
Vector<MachineType> param_vec(param_machine_types.data(),
param_machine_types.size());
return CreateSig(MachineTypeForC<ReturnType>(), param_vec);
}
protected:
v8::internal::AccountingAllocator allocator_;
Zone zone_;
TestingModule module_;
std::vector<std::unique_ptr<WasmFunctionCompiler>> functions_;
WasmFunctionWrapper wrapper_;
bool compiled_ = false;
bool possible_nondeterminism_ = false;
bool interpret() { return module_.execution_mode() == kExecuteInterpreted; }
public:
// This field has to be static. Otherwise, gcc complains about the using in
// the lambda context below.
static jmp_buf jump_buffer;
};
template <typename ReturnType, typename... ParamTypes>
class WasmRunner : public WasmRunnerBase {
public:
explicit WasmRunner(WasmExecutionMode execution_mode,
const char* main_fn_name = "main")
: WasmRunnerBase(execution_mode, sizeof...(ParamTypes)) {
NewFunction<ReturnType, ParamTypes...>(main_fn_name);
if (!interpret()) {
wrapper_.Init<ReturnType, ParamTypes...>(functions_[0]->descriptor());
}
}
ReturnType Call(ParamTypes... p) {
DCHECK(compiled_);
if (interpret()) return CallInterpreter(p...);
// Use setjmp/longjmp to deal with traps in WebAssembly code.
ReturnType return_value = static_cast<ReturnType>(0xdeadbeefdeadbeef);
static int setjmp_ret;
setjmp_ret = setjmp(WasmRunnerBase::jump_buffer);
// setjmp returns 0 on the first return, 1 (passed to longjmp) after trap.
if (setjmp_ret == 0) {
DoCall(static_cast<void*>(&p)..., static_cast<void*>(&return_value));
}
return return_value;
}
ReturnType CallInterpreter(ParamTypes... p) {
WasmInterpreter::Thread* thread = interpreter()->GetThread(0);
thread->Reset();
std::array<WasmVal, sizeof...(p)> args{{WasmVal(p)...}};
thread->PushFrame(function(), args.data());
if (thread->Run() == WasmInterpreter::FINISHED) {
WasmVal val = thread->GetReturnValue();
possible_nondeterminism_ |= thread->PossibleNondeterminism();
return val.to<ReturnType>();
} else if (thread->state() == WasmInterpreter::TRAPPED) {
// TODO(titzer): return the correct trap code
int64_t result = 0xdeadbeefdeadbeef;
return static_cast<ReturnType>(result);
} else {
// TODO(titzer): falling off end
return ReturnType{0};
}
}
private:
// Don't inline this function. The setjmp above should be followed immediately
// by a call.
template <typename... Ptrs>
V8_NOINLINE void DoCall(Ptrs... ptrs) {
auto trap_callback = []() -> void {
set_trap_callback_for_testing(nullptr);
longjmp(WasmRunnerBase::jump_buffer, 1);
};
set_trap_callback_for_testing(trap_callback);
wrapper_.SetInnerCode(
module_.GetFunctionCode(functions_[0]->function_index()));
CodeRunner<int32_t> runner(CcTest::InitIsolateOnce(),
wrapper_.GetWrapperCode(), wrapper_.signature());
int32_t result = runner.Call(ptrs...);
// If we arrive here, no trap happened.
CHECK_EQ(WASM_WRAPPER_RETURN_VALUE, result);
}
};
// Declare static variable.
jmp_buf WasmRunnerBase::jump_buffer;
// A macro to define tests that run in different engine configurations.
#define WASM_EXEC_TEST(name) \
void RunWasm_##name(WasmExecutionMode execution_mode); \
TEST(RunWasmCompiled_##name) { RunWasm_##name(kExecuteCompiled); } \
TEST(RunWasmInterpreted_##name) { RunWasm_##name(kExecuteInterpreted); } \
void RunWasm_##name(WasmExecutionMode execution_mode)
#define WASM_EXEC_TEST_WITH_TRAP(name) \
void RunWasm_##name(WasmExecutionMode execution_mode); \
TEST(RunWasmCompiled_##name) { RunWasm_##name(kExecuteCompiled); } \
void RunWasm_##name(WasmExecutionMode execution_mode); \
TEST(RunWasmCompiledWithoutTrapIf_##name) { \
bool trap_if = FLAG_wasm_trap_if; \
FLAG_wasm_trap_if = false; \
RunWasm_##name(kExecuteCompiled); \
FLAG_wasm_trap_if = trap_if; \
} \
TEST(RunWasmInterpreted_##name) { RunWasm_##name(kExecuteInterpreted); } \
void RunWasm_##name(WasmExecutionMode execution_mode)
#define WASM_EXEC_COMPILED_TEST(name) \
void RunWasm_##name(WasmExecutionMode execution_mode); \
TEST(RunWasmCompiled_##name) { RunWasm_##name(kExecuteCompiled); } \
void RunWasm_##name(WasmExecutionMode execution_mode)
} // namespace
#endif
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