59b06fd638
R=jkummerow@chromium.org BUG=117767,V8:1902 Review URL: https://chromiumcodereview.appspot.com/9836091 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11143 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
827 lines
31 KiB
C++
827 lines
31 KiB
C++
// Copyright 2012 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 "v8.h"
|
|
|
|
#include "compiler.h"
|
|
|
|
#include "bootstrapper.h"
|
|
#include "codegen.h"
|
|
#include "compilation-cache.h"
|
|
#include "debug.h"
|
|
#include "full-codegen.h"
|
|
#include "gdb-jit.h"
|
|
#include "hydrogen.h"
|
|
#include "isolate-inl.h"
|
|
#include "lithium.h"
|
|
#include "liveedit.h"
|
|
#include "parser.h"
|
|
#include "rewriter.h"
|
|
#include "runtime-profiler.h"
|
|
#include "scanner-character-streams.h"
|
|
#include "scopeinfo.h"
|
|
#include "scopes.h"
|
|
#include "vm-state-inl.h"
|
|
|
|
namespace v8 {
|
|
namespace internal {
|
|
|
|
|
|
CompilationInfo::CompilationInfo(Handle<Script> script)
|
|
: isolate_(script->GetIsolate()),
|
|
flags_(LanguageModeField::encode(CLASSIC_MODE)),
|
|
function_(NULL),
|
|
scope_(NULL),
|
|
global_scope_(NULL),
|
|
script_(script),
|
|
extension_(NULL),
|
|
pre_parse_data_(NULL),
|
|
osr_ast_id_(AstNode::kNoNumber) {
|
|
Initialize(BASE);
|
|
}
|
|
|
|
|
|
CompilationInfo::CompilationInfo(Handle<SharedFunctionInfo> shared_info)
|
|
: isolate_(shared_info->GetIsolate()),
|
|
flags_(LanguageModeField::encode(CLASSIC_MODE) |
|
|
IsLazy::encode(true)),
|
|
function_(NULL),
|
|
scope_(NULL),
|
|
global_scope_(NULL),
|
|
shared_info_(shared_info),
|
|
script_(Handle<Script>(Script::cast(shared_info->script()))),
|
|
extension_(NULL),
|
|
pre_parse_data_(NULL),
|
|
osr_ast_id_(AstNode::kNoNumber) {
|
|
Initialize(BASE);
|
|
}
|
|
|
|
|
|
CompilationInfo::CompilationInfo(Handle<JSFunction> closure)
|
|
: isolate_(closure->GetIsolate()),
|
|
flags_(LanguageModeField::encode(CLASSIC_MODE) |
|
|
IsLazy::encode(true)),
|
|
function_(NULL),
|
|
scope_(NULL),
|
|
global_scope_(NULL),
|
|
closure_(closure),
|
|
shared_info_(Handle<SharedFunctionInfo>(closure->shared())),
|
|
script_(Handle<Script>(Script::cast(shared_info_->script()))),
|
|
extension_(NULL),
|
|
pre_parse_data_(NULL),
|
|
osr_ast_id_(AstNode::kNoNumber) {
|
|
Initialize(BASE);
|
|
}
|
|
|
|
|
|
// Disable optimization for the rest of the compilation pipeline.
|
|
void CompilationInfo::DisableOptimization() {
|
|
bool is_optimizable_closure =
|
|
FLAG_optimize_closures &&
|
|
closure_.is_null() &&
|
|
!scope_->HasTrivialOuterContext() &&
|
|
!scope_->outer_scope_calls_non_strict_eval() &&
|
|
!scope_->inside_with();
|
|
SetMode(is_optimizable_closure ? BASE : NONOPT);
|
|
}
|
|
|
|
|
|
// Primitive functions are unlikely to be picked up by the stack-walking
|
|
// profiler, so they trigger their own optimization when they're called
|
|
// for the SharedFunctionInfo::kCallsUntilPrimitiveOptimization-th time.
|
|
bool CompilationInfo::ShouldSelfOptimize() {
|
|
return FLAG_self_optimization &&
|
|
FLAG_crankshaft &&
|
|
!function()->flags()->Contains(kDontSelfOptimize) &&
|
|
!function()->flags()->Contains(kDontOptimize) &&
|
|
function()->scope()->allows_lazy_recompilation() &&
|
|
(shared_info().is_null() || !shared_info()->optimization_disabled());
|
|
}
|
|
|
|
|
|
void CompilationInfo::AbortOptimization() {
|
|
Handle<Code> code(shared_info()->code());
|
|
SetCode(code);
|
|
}
|
|
|
|
|
|
// Determine whether to use the full compiler for all code. If the flag
|
|
// --always-full-compiler is specified this is the case. For the virtual frame
|
|
// based compiler the full compiler is also used if a debugger is connected, as
|
|
// the code from the full compiler supports mode precise break points. For the
|
|
// crankshaft adaptive compiler debugging the optimized code is not possible at
|
|
// all. However crankshaft support recompilation of functions, so in this case
|
|
// the full compiler need not be be used if a debugger is attached, but only if
|
|
// break points has actually been set.
|
|
static bool is_debugging_active() {
|
|
#ifdef ENABLE_DEBUGGER_SUPPORT
|
|
Isolate* isolate = Isolate::Current();
|
|
return V8::UseCrankshaft() ?
|
|
isolate->debug()->has_break_points() :
|
|
isolate->debugger()->IsDebuggerActive();
|
|
#else
|
|
return false;
|
|
#endif
|
|
}
|
|
|
|
|
|
static bool AlwaysFullCompiler() {
|
|
return FLAG_always_full_compiler || is_debugging_active();
|
|
}
|
|
|
|
|
|
static void FinishOptimization(Handle<JSFunction> function, int64_t start) {
|
|
int opt_count = function->shared()->opt_count();
|
|
function->shared()->set_opt_count(opt_count + 1);
|
|
double ms = static_cast<double>(OS::Ticks() - start) / 1000;
|
|
if (FLAG_trace_opt) {
|
|
PrintF("[optimizing: ");
|
|
function->PrintName();
|
|
PrintF(" / %" V8PRIxPTR, reinterpret_cast<intptr_t>(*function));
|
|
PrintF(" - took %0.3f ms]\n", ms);
|
|
}
|
|
if (FLAG_trace_opt_stats) {
|
|
static double compilation_time = 0.0;
|
|
static int compiled_functions = 0;
|
|
static int code_size = 0;
|
|
|
|
compilation_time += ms;
|
|
compiled_functions++;
|
|
code_size += function->shared()->SourceSize();
|
|
PrintF("Compiled: %d functions with %d byte source size in %fms.\n",
|
|
compiled_functions,
|
|
code_size,
|
|
compilation_time);
|
|
}
|
|
}
|
|
|
|
|
|
static bool MakeCrankshaftCode(CompilationInfo* info) {
|
|
// Test if we can optimize this function when asked to. We can only
|
|
// do this after the scopes are computed.
|
|
if (!V8::UseCrankshaft()) {
|
|
info->DisableOptimization();
|
|
}
|
|
|
|
// In case we are not optimizing simply return the code from
|
|
// the full code generator.
|
|
if (!info->IsOptimizing()) {
|
|
return FullCodeGenerator::MakeCode(info);
|
|
}
|
|
|
|
// We should never arrive here if there is not code object on the
|
|
// shared function object.
|
|
Handle<Code> code(info->shared_info()->code());
|
|
ASSERT(code->kind() == Code::FUNCTION);
|
|
|
|
// We should never arrive here if optimization has been disabled on the
|
|
// shared function info.
|
|
ASSERT(!info->shared_info()->optimization_disabled());
|
|
|
|
// Fall back to using the full code generator if it's not possible
|
|
// to use the Hydrogen-based optimizing compiler. We already have
|
|
// generated code for this from the shared function object.
|
|
if (AlwaysFullCompiler()) {
|
|
info->SetCode(code);
|
|
return true;
|
|
}
|
|
|
|
// Limit the number of times we re-compile a functions with
|
|
// the optimizing compiler.
|
|
const int kMaxOptCount =
|
|
FLAG_deopt_every_n_times == 0 ? Compiler::kDefaultMaxOptCount : 1000;
|
|
if (info->shared_info()->opt_count() > kMaxOptCount) {
|
|
info->AbortOptimization();
|
|
info->shared_info()->DisableOptimization();
|
|
// True indicates the compilation pipeline is still going, not
|
|
// necessarily that we optimized the code.
|
|
return true;
|
|
}
|
|
|
|
// Due to an encoding limit on LUnallocated operands in the Lithium
|
|
// language, we cannot optimize functions with too many formal parameters
|
|
// or perform on-stack replacement for function with too many
|
|
// stack-allocated local variables.
|
|
//
|
|
// The encoding is as a signed value, with parameters and receiver using
|
|
// the negative indices and locals the non-negative ones.
|
|
const int parameter_limit = -LUnallocated::kMinFixedIndex;
|
|
const int locals_limit = LUnallocated::kMaxFixedIndex;
|
|
Scope* scope = info->scope();
|
|
if ((scope->num_parameters() + 1) > parameter_limit ||
|
|
(info->osr_ast_id() != AstNode::kNoNumber &&
|
|
scope->num_parameters() + 1 + scope->num_stack_slots() > locals_limit)) {
|
|
info->AbortOptimization();
|
|
info->shared_info()->DisableOptimization();
|
|
// True indicates the compilation pipeline is still going, not
|
|
// necessarily that we optimized the code.
|
|
return true;
|
|
}
|
|
|
|
// Take --hydrogen-filter into account.
|
|
Handle<String> name = info->function()->debug_name();
|
|
if (*FLAG_hydrogen_filter != '\0') {
|
|
Vector<const char> filter = CStrVector(FLAG_hydrogen_filter);
|
|
if ((filter[0] == '-'
|
|
&& name->IsEqualTo(filter.SubVector(1, filter.length())))
|
|
|| (filter[0] != '-' && !name->IsEqualTo(filter))) {
|
|
info->SetCode(code);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
// Recompile the unoptimized version of the code if the current version
|
|
// doesn't have deoptimization support. Alternatively, we may decide to
|
|
// run the full code generator to get a baseline for the compile-time
|
|
// performance of the hydrogen-based compiler.
|
|
int64_t start = OS::Ticks();
|
|
bool should_recompile = !info->shared_info()->has_deoptimization_support();
|
|
if (should_recompile || FLAG_hydrogen_stats) {
|
|
HPhase phase(HPhase::kFullCodeGen);
|
|
CompilationInfo unoptimized(info->shared_info());
|
|
// Note that we use the same AST that we will use for generating the
|
|
// optimized code.
|
|
unoptimized.SetFunction(info->function());
|
|
unoptimized.SetScope(info->scope());
|
|
if (should_recompile) unoptimized.EnableDeoptimizationSupport();
|
|
bool succeeded = FullCodeGenerator::MakeCode(&unoptimized);
|
|
if (should_recompile) {
|
|
if (!succeeded) return false;
|
|
Handle<SharedFunctionInfo> shared = info->shared_info();
|
|
shared->EnableDeoptimizationSupport(*unoptimized.code());
|
|
// The existing unoptimized code was replaced with the new one.
|
|
Compiler::RecordFunctionCompilation(
|
|
Logger::LAZY_COMPILE_TAG, &unoptimized, shared);
|
|
}
|
|
}
|
|
|
|
// Check that the unoptimized, shared code is ready for
|
|
// optimizations. When using the always_opt flag we disregard the
|
|
// optimizable marker in the code object and optimize anyway. This
|
|
// is safe as long as the unoptimized code has deoptimization
|
|
// support.
|
|
ASSERT(FLAG_always_opt || code->optimizable());
|
|
ASSERT(info->shared_info()->has_deoptimization_support());
|
|
|
|
if (FLAG_trace_hydrogen) {
|
|
PrintF("-----------------------------------------------------------\n");
|
|
PrintF("Compiling method %s using hydrogen\n", *name->ToCString());
|
|
HTracer::Instance()->TraceCompilation(info->function());
|
|
}
|
|
|
|
Handle<Context> global_context(info->closure()->context()->global_context());
|
|
TypeFeedbackOracle oracle(code, global_context, info->isolate());
|
|
HGraphBuilder builder(info, &oracle);
|
|
HPhase phase(HPhase::kTotal);
|
|
HGraph* graph = builder.CreateGraph();
|
|
if (info->isolate()->has_pending_exception()) {
|
|
info->SetCode(Handle<Code>::null());
|
|
return false;
|
|
}
|
|
|
|
if (graph != NULL) {
|
|
Handle<Code> optimized_code = graph->Compile(info);
|
|
if (!optimized_code.is_null()) {
|
|
info->SetCode(optimized_code);
|
|
FinishOptimization(info->closure(), start);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
// Keep using the shared code.
|
|
info->AbortOptimization();
|
|
if (!builder.inline_bailout()) {
|
|
// Mark the shared code as unoptimizable unless it was an inlined
|
|
// function that bailed out.
|
|
info->shared_info()->DisableOptimization();
|
|
}
|
|
// True indicates the compilation pipeline is still going, not necessarily
|
|
// that we optimized the code.
|
|
return true;
|
|
}
|
|
|
|
|
|
static bool GenerateCode(CompilationInfo* info) {
|
|
return info->IsCompilingForDebugging() || !V8::UseCrankshaft() ?
|
|
FullCodeGenerator::MakeCode(info) :
|
|
MakeCrankshaftCode(info);
|
|
}
|
|
|
|
|
|
static bool MakeCode(CompilationInfo* info) {
|
|
// Precondition: code has been parsed. Postcondition: the code field in
|
|
// the compilation info is set if compilation succeeded.
|
|
ASSERT(info->function() != NULL);
|
|
return Rewriter::Rewrite(info) && Scope::Analyze(info) && GenerateCode(info);
|
|
}
|
|
|
|
|
|
#ifdef ENABLE_DEBUGGER_SUPPORT
|
|
bool Compiler::MakeCodeForLiveEdit(CompilationInfo* info) {
|
|
// Precondition: code has been parsed. Postcondition: the code field in
|
|
// the compilation info is set if compilation succeeded.
|
|
bool succeeded = MakeCode(info);
|
|
if (!info->shared_info().is_null()) {
|
|
Handle<ScopeInfo> scope_info = ScopeInfo::Create(info->scope());
|
|
info->shared_info()->set_scope_info(*scope_info);
|
|
}
|
|
return succeeded;
|
|
}
|
|
#endif
|
|
|
|
|
|
static Handle<SharedFunctionInfo> MakeFunctionInfo(CompilationInfo* info) {
|
|
Isolate* isolate = info->isolate();
|
|
ZoneScope zone_scope(isolate, DELETE_ON_EXIT);
|
|
PostponeInterruptsScope postpone(isolate);
|
|
|
|
ASSERT(!isolate->global_context().is_null());
|
|
Handle<Script> script = info->script();
|
|
script->set_context_data((*isolate->global_context())->data());
|
|
|
|
#ifdef ENABLE_DEBUGGER_SUPPORT
|
|
if (info->is_eval()) {
|
|
Script::CompilationType compilation_type = Script::COMPILATION_TYPE_EVAL;
|
|
script->set_compilation_type(Smi::FromInt(compilation_type));
|
|
// For eval scripts add information on the function from which eval was
|
|
// called.
|
|
if (info->is_eval()) {
|
|
StackTraceFrameIterator it(isolate);
|
|
if (!it.done()) {
|
|
script->set_eval_from_shared(
|
|
JSFunction::cast(it.frame()->function())->shared());
|
|
Code* code = it.frame()->LookupCode();
|
|
int offset = static_cast<int>(
|
|
it.frame()->pc() - code->instruction_start());
|
|
script->set_eval_from_instructions_offset(Smi::FromInt(offset));
|
|
}
|
|
}
|
|
}
|
|
|
|
// Notify debugger
|
|
isolate->debugger()->OnBeforeCompile(script);
|
|
#endif
|
|
|
|
// Only allow non-global compiles for eval.
|
|
ASSERT(info->is_eval() || info->is_global());
|
|
ParsingFlags flags = kNoParsingFlags;
|
|
if (info->pre_parse_data() != NULL ||
|
|
String::cast(script->source())->length() > FLAG_min_preparse_length) {
|
|
flags = kAllowLazy;
|
|
}
|
|
if (!ParserApi::Parse(info, flags)) {
|
|
return Handle<SharedFunctionInfo>::null();
|
|
}
|
|
|
|
// Measure how long it takes to do the compilation; only take the
|
|
// rest of the function into account to avoid overlap with the
|
|
// parsing statistics.
|
|
HistogramTimer* rate = info->is_eval()
|
|
? info->isolate()->counters()->compile_eval()
|
|
: info->isolate()->counters()->compile();
|
|
HistogramTimerScope timer(rate);
|
|
|
|
// Compile the code.
|
|
FunctionLiteral* lit = info->function();
|
|
LiveEditFunctionTracker live_edit_tracker(isolate, lit);
|
|
if (!MakeCode(info)) {
|
|
if (!isolate->has_pending_exception()) isolate->StackOverflow();
|
|
return Handle<SharedFunctionInfo>::null();
|
|
}
|
|
|
|
// Allocate function.
|
|
ASSERT(!info->code().is_null());
|
|
Handle<SharedFunctionInfo> result =
|
|
isolate->factory()->NewSharedFunctionInfo(
|
|
lit->name(),
|
|
lit->materialized_literal_count(),
|
|
info->code(),
|
|
ScopeInfo::Create(info->scope()));
|
|
|
|
ASSERT_EQ(RelocInfo::kNoPosition, lit->function_token_position());
|
|
Compiler::SetFunctionInfo(result, lit, true, script);
|
|
|
|
if (script->name()->IsString()) {
|
|
PROFILE(isolate, CodeCreateEvent(
|
|
info->is_eval()
|
|
? Logger::EVAL_TAG
|
|
: Logger::ToNativeByScript(Logger::SCRIPT_TAG, *script),
|
|
*info->code(),
|
|
*result,
|
|
String::cast(script->name())));
|
|
GDBJIT(AddCode(Handle<String>(String::cast(script->name())),
|
|
script,
|
|
info->code(),
|
|
info));
|
|
} else {
|
|
PROFILE(isolate, CodeCreateEvent(
|
|
info->is_eval()
|
|
? Logger::EVAL_TAG
|
|
: Logger::ToNativeByScript(Logger::SCRIPT_TAG, *script),
|
|
*info->code(),
|
|
*result,
|
|
isolate->heap()->empty_string()));
|
|
GDBJIT(AddCode(Handle<String>(), script, info->code(), info));
|
|
}
|
|
|
|
// Hint to the runtime system used when allocating space for initial
|
|
// property space by setting the expected number of properties for
|
|
// the instances of the function.
|
|
SetExpectedNofPropertiesFromEstimate(result, lit->expected_property_count());
|
|
|
|
script->set_compilation_state(
|
|
Smi::FromInt(Script::COMPILATION_STATE_COMPILED));
|
|
|
|
#ifdef ENABLE_DEBUGGER_SUPPORT
|
|
// Notify debugger
|
|
isolate->debugger()->OnAfterCompile(
|
|
script, Debugger::NO_AFTER_COMPILE_FLAGS);
|
|
#endif
|
|
|
|
live_edit_tracker.RecordFunctionInfo(result, lit);
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
Handle<SharedFunctionInfo> Compiler::Compile(Handle<String> source,
|
|
Handle<Object> script_name,
|
|
int line_offset,
|
|
int column_offset,
|
|
v8::Extension* extension,
|
|
ScriptDataImpl* pre_data,
|
|
Handle<Object> script_data,
|
|
NativesFlag natives) {
|
|
Isolate* isolate = source->GetIsolate();
|
|
int source_length = source->length();
|
|
isolate->counters()->total_load_size()->Increment(source_length);
|
|
isolate->counters()->total_compile_size()->Increment(source_length);
|
|
|
|
// The VM is in the COMPILER state until exiting this function.
|
|
VMState state(isolate, COMPILER);
|
|
|
|
CompilationCache* compilation_cache = isolate->compilation_cache();
|
|
|
|
// Do a lookup in the compilation cache but not for extensions.
|
|
Handle<SharedFunctionInfo> result;
|
|
if (extension == NULL) {
|
|
result = compilation_cache->LookupScript(source,
|
|
script_name,
|
|
line_offset,
|
|
column_offset);
|
|
}
|
|
|
|
if (result.is_null()) {
|
|
// No cache entry found. Do pre-parsing, if it makes sense, and compile
|
|
// the script.
|
|
// Building preparse data that is only used immediately after is only a
|
|
// saving if we might skip building the AST for lazily compiled functions.
|
|
// I.e., preparse data isn't relevant when the lazy flag is off, and
|
|
// for small sources, odds are that there aren't many functions
|
|
// that would be compiled lazily anyway, so we skip the preparse step
|
|
// in that case too.
|
|
|
|
// Create a script object describing the script to be compiled.
|
|
Handle<Script> script = FACTORY->NewScript(source);
|
|
if (natives == NATIVES_CODE) {
|
|
script->set_type(Smi::FromInt(Script::TYPE_NATIVE));
|
|
}
|
|
if (!script_name.is_null()) {
|
|
script->set_name(*script_name);
|
|
script->set_line_offset(Smi::FromInt(line_offset));
|
|
script->set_column_offset(Smi::FromInt(column_offset));
|
|
}
|
|
|
|
script->set_data(script_data.is_null() ? HEAP->undefined_value()
|
|
: *script_data);
|
|
|
|
// Compile the function and add it to the cache.
|
|
CompilationInfo info(script);
|
|
info.MarkAsGlobal();
|
|
info.SetExtension(extension);
|
|
info.SetPreParseData(pre_data);
|
|
if (FLAG_use_strict) {
|
|
info.SetLanguageMode(FLAG_harmony_scoping ? EXTENDED_MODE : STRICT_MODE);
|
|
}
|
|
result = MakeFunctionInfo(&info);
|
|
if (extension == NULL && !result.is_null()) {
|
|
compilation_cache->PutScript(source, result);
|
|
}
|
|
} else {
|
|
if (result->ic_age() != HEAP->global_ic_age()) {
|
|
result->ResetForNewContext(HEAP->global_ic_age());
|
|
}
|
|
}
|
|
|
|
if (result.is_null()) isolate->ReportPendingMessages();
|
|
return result;
|
|
}
|
|
|
|
|
|
Handle<SharedFunctionInfo> Compiler::CompileEval(Handle<String> source,
|
|
Handle<Context> context,
|
|
bool is_global,
|
|
LanguageMode language_mode,
|
|
int scope_position) {
|
|
Isolate* isolate = source->GetIsolate();
|
|
int source_length = source->length();
|
|
isolate->counters()->total_eval_size()->Increment(source_length);
|
|
isolate->counters()->total_compile_size()->Increment(source_length);
|
|
|
|
// The VM is in the COMPILER state until exiting this function.
|
|
VMState state(isolate, COMPILER);
|
|
|
|
// Do a lookup in the compilation cache; if the entry is not there, invoke
|
|
// the compiler and add the result to the cache.
|
|
Handle<SharedFunctionInfo> result;
|
|
CompilationCache* compilation_cache = isolate->compilation_cache();
|
|
result = compilation_cache->LookupEval(source,
|
|
context,
|
|
is_global,
|
|
language_mode,
|
|
scope_position);
|
|
|
|
if (result.is_null()) {
|
|
// Create a script object describing the script to be compiled.
|
|
Handle<Script> script = isolate->factory()->NewScript(source);
|
|
CompilationInfo info(script);
|
|
info.MarkAsEval();
|
|
if (is_global) info.MarkAsGlobal();
|
|
info.SetLanguageMode(language_mode);
|
|
info.SetCallingContext(context);
|
|
result = MakeFunctionInfo(&info);
|
|
if (!result.is_null()) {
|
|
// Explicitly disable optimization for eval code. We're not yet prepared
|
|
// to handle eval-code in the optimizing compiler.
|
|
result->DisableOptimization();
|
|
|
|
// If caller is strict mode, the result must be in strict mode or
|
|
// extended mode as well, but not the other way around. Consider:
|
|
// eval("'use strict'; ...");
|
|
ASSERT(language_mode != STRICT_MODE || !result->is_classic_mode());
|
|
// If caller is in extended mode, the result must also be in
|
|
// extended mode.
|
|
ASSERT(language_mode != EXTENDED_MODE ||
|
|
result->is_extended_mode());
|
|
compilation_cache->PutEval(
|
|
source, context, is_global, result, scope_position);
|
|
}
|
|
} else {
|
|
if (result->ic_age() != HEAP->global_ic_age()) {
|
|
result->ResetForNewContext(HEAP->global_ic_age());
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
bool Compiler::CompileLazy(CompilationInfo* info) {
|
|
Isolate* isolate = info->isolate();
|
|
|
|
ZoneScope zone_scope(isolate, DELETE_ON_EXIT);
|
|
|
|
// The VM is in the COMPILER state until exiting this function.
|
|
VMState state(isolate, COMPILER);
|
|
|
|
PostponeInterruptsScope postpone(isolate);
|
|
|
|
Handle<SharedFunctionInfo> shared = info->shared_info();
|
|
int compiled_size = shared->end_position() - shared->start_position();
|
|
isolate->counters()->total_compile_size()->Increment(compiled_size);
|
|
|
|
// Generate the AST for the lazily compiled function.
|
|
if (ParserApi::Parse(info, kNoParsingFlags)) {
|
|
// Measure how long it takes to do the lazy compilation; only take the
|
|
// rest of the function into account to avoid overlap with the lazy
|
|
// parsing statistics.
|
|
HistogramTimerScope timer(isolate->counters()->compile_lazy());
|
|
|
|
// After parsing we know the function's language mode. Remember it.
|
|
LanguageMode language_mode = info->function()->language_mode();
|
|
info->SetLanguageMode(language_mode);
|
|
shared->set_language_mode(language_mode);
|
|
|
|
// Compile the code.
|
|
if (!MakeCode(info)) {
|
|
if (!isolate->has_pending_exception()) {
|
|
isolate->StackOverflow();
|
|
}
|
|
} else {
|
|
ASSERT(!info->code().is_null());
|
|
Handle<Code> code = info->code();
|
|
// Set optimizable to false if this is disallowed by the shared
|
|
// function info, e.g., we might have flushed the code and must
|
|
// reset this bit when lazy compiling the code again.
|
|
if (shared->optimization_disabled()) code->set_optimizable(false);
|
|
|
|
Handle<JSFunction> function = info->closure();
|
|
RecordFunctionCompilation(Logger::LAZY_COMPILE_TAG, info, shared);
|
|
|
|
if (info->IsOptimizing()) {
|
|
ASSERT(shared->scope_info() != ScopeInfo::Empty());
|
|
function->ReplaceCode(*code);
|
|
} else {
|
|
// Update the shared function info with the compiled code and the
|
|
// scope info. Please note, that the order of the shared function
|
|
// info initialization is important since set_scope_info might
|
|
// trigger a GC, causing the ASSERT below to be invalid if the code
|
|
// was flushed. By setting the code object last we avoid this.
|
|
Handle<ScopeInfo> scope_info = ScopeInfo::Create(info->scope());
|
|
shared->set_scope_info(*scope_info);
|
|
shared->set_code(*code);
|
|
if (!function.is_null()) {
|
|
function->ReplaceCode(*code);
|
|
ASSERT(!function->IsOptimized());
|
|
}
|
|
|
|
// Set the expected number of properties for instances.
|
|
FunctionLiteral* lit = info->function();
|
|
int expected = lit->expected_property_count();
|
|
SetExpectedNofPropertiesFromEstimate(shared, expected);
|
|
|
|
// Set the optimization hints after performing lazy compilation, as
|
|
// these are not set when the function is set up as a lazily
|
|
// compiled function.
|
|
shared->SetThisPropertyAssignmentsInfo(
|
|
lit->has_only_simple_this_property_assignments(),
|
|
*lit->this_property_assignments());
|
|
|
|
// Check the function has compiled code.
|
|
ASSERT(shared->is_compiled());
|
|
shared->set_code_age(0);
|
|
shared->set_dont_optimize(lit->flags()->Contains(kDontOptimize));
|
|
shared->set_dont_inline(lit->flags()->Contains(kDontInline));
|
|
shared->set_ast_node_count(lit->ast_node_count());
|
|
|
|
if (V8::UseCrankshaft()&&
|
|
!function.is_null() &&
|
|
!shared->optimization_disabled()) {
|
|
// If we're asked to always optimize, we compile the optimized
|
|
// version of the function right away - unless the debugger is
|
|
// active as it makes no sense to compile optimized code then.
|
|
if (FLAG_always_opt &&
|
|
!Isolate::Current()->DebuggerHasBreakPoints()) {
|
|
CompilationInfo optimized(function);
|
|
optimized.SetOptimizing(AstNode::kNoNumber);
|
|
return CompileLazy(&optimized);
|
|
}
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
}
|
|
|
|
ASSERT(info->code().is_null());
|
|
return false;
|
|
}
|
|
|
|
|
|
Handle<SharedFunctionInfo> Compiler::BuildFunctionInfo(FunctionLiteral* literal,
|
|
Handle<Script> script) {
|
|
// Precondition: code has been parsed and scopes have been analyzed.
|
|
CompilationInfo info(script);
|
|
info.SetFunction(literal);
|
|
info.SetScope(literal->scope());
|
|
info.SetLanguageMode(literal->scope()->language_mode());
|
|
|
|
LiveEditFunctionTracker live_edit_tracker(info.isolate(), literal);
|
|
// Determine if the function can be lazily compiled. This is necessary to
|
|
// allow some of our builtin JS files to be lazily compiled. These
|
|
// builtins cannot be handled lazily by the parser, since we have to know
|
|
// if a function uses the special natives syntax, which is something the
|
|
// parser records.
|
|
bool allow_lazy = literal->AllowsLazyCompilation() &&
|
|
!LiveEditFunctionTracker::IsActive(info.isolate());
|
|
|
|
Handle<ScopeInfo> scope_info(ScopeInfo::Empty());
|
|
|
|
// Generate code
|
|
if (FLAG_lazy && allow_lazy) {
|
|
Handle<Code> code = info.isolate()->builtins()->LazyCompile();
|
|
info.SetCode(code);
|
|
} else if ((V8::UseCrankshaft() && MakeCrankshaftCode(&info)) ||
|
|
(!V8::UseCrankshaft() && FullCodeGenerator::MakeCode(&info))) {
|
|
ASSERT(!info.code().is_null());
|
|
scope_info = ScopeInfo::Create(info.scope());
|
|
} else {
|
|
return Handle<SharedFunctionInfo>::null();
|
|
}
|
|
|
|
// Create a shared function info object.
|
|
Handle<SharedFunctionInfo> result =
|
|
FACTORY->NewSharedFunctionInfo(literal->name(),
|
|
literal->materialized_literal_count(),
|
|
info.code(),
|
|
scope_info);
|
|
SetFunctionInfo(result, literal, false, script);
|
|
RecordFunctionCompilation(Logger::FUNCTION_TAG, &info, result);
|
|
result->set_allows_lazy_compilation(allow_lazy);
|
|
|
|
// Set the expected number of properties for instances and return
|
|
// the resulting function.
|
|
SetExpectedNofPropertiesFromEstimate(result,
|
|
literal->expected_property_count());
|
|
live_edit_tracker.RecordFunctionInfo(result, literal);
|
|
return result;
|
|
}
|
|
|
|
|
|
// Sets the function info on a function.
|
|
// The start_position points to the first '(' character after the function name
|
|
// in the full script source. When counting characters in the script source the
|
|
// the first character is number 0 (not 1).
|
|
void Compiler::SetFunctionInfo(Handle<SharedFunctionInfo> function_info,
|
|
FunctionLiteral* lit,
|
|
bool is_toplevel,
|
|
Handle<Script> script) {
|
|
function_info->set_length(lit->parameter_count());
|
|
function_info->set_formal_parameter_count(lit->parameter_count());
|
|
function_info->set_script(*script);
|
|
function_info->set_function_token_position(lit->function_token_position());
|
|
function_info->set_start_position(lit->start_position());
|
|
function_info->set_end_position(lit->end_position());
|
|
function_info->set_is_expression(lit->is_expression());
|
|
function_info->set_is_anonymous(lit->is_anonymous());
|
|
function_info->set_is_toplevel(is_toplevel);
|
|
function_info->set_inferred_name(*lit->inferred_name());
|
|
function_info->SetThisPropertyAssignmentsInfo(
|
|
lit->has_only_simple_this_property_assignments(),
|
|
*lit->this_property_assignments());
|
|
function_info->set_allows_lazy_compilation(lit->AllowsLazyCompilation());
|
|
function_info->set_language_mode(lit->language_mode());
|
|
function_info->set_uses_arguments(lit->scope()->arguments() != NULL);
|
|
function_info->set_has_duplicate_parameters(lit->has_duplicate_parameters());
|
|
function_info->set_ast_node_count(lit->ast_node_count());
|
|
function_info->set_is_function(lit->is_function());
|
|
function_info->set_dont_optimize(lit->flags()->Contains(kDontOptimize));
|
|
function_info->set_dont_inline(lit->flags()->Contains(kDontInline));
|
|
}
|
|
|
|
|
|
void Compiler::RecordFunctionCompilation(Logger::LogEventsAndTags tag,
|
|
CompilationInfo* info,
|
|
Handle<SharedFunctionInfo> shared) {
|
|
// SharedFunctionInfo is passed separately, because if CompilationInfo
|
|
// was created using Script object, it will not have it.
|
|
|
|
// Log the code generation. If source information is available include
|
|
// script name and line number. Check explicitly whether logging is
|
|
// enabled as finding the line number is not free.
|
|
if (info->isolate()->logger()->is_logging() ||
|
|
CpuProfiler::is_profiling(info->isolate())) {
|
|
Handle<Script> script = info->script();
|
|
Handle<Code> code = info->code();
|
|
if (*code == info->isolate()->builtins()->builtin(Builtins::kLazyCompile))
|
|
return;
|
|
if (script->name()->IsString()) {
|
|
int line_num = GetScriptLineNumber(script, shared->start_position()) + 1;
|
|
USE(line_num);
|
|
PROFILE(info->isolate(),
|
|
CodeCreateEvent(Logger::ToNativeByScript(tag, *script),
|
|
*code,
|
|
*shared,
|
|
String::cast(script->name()),
|
|
line_num));
|
|
} else {
|
|
PROFILE(info->isolate(),
|
|
CodeCreateEvent(Logger::ToNativeByScript(tag, *script),
|
|
*code,
|
|
*shared,
|
|
shared->DebugName()));
|
|
}
|
|
}
|
|
|
|
GDBJIT(AddCode(Handle<String>(shared->DebugName()),
|
|
Handle<Script>(info->script()),
|
|
Handle<Code>(info->code()),
|
|
info));
|
|
}
|
|
|
|
} } // namespace v8::internal
|