Revision: 16609
Author: yang...@chromium.org
Date: Tue Sep 10 11:09:22 2013 UTC
Log: Fix concurrent osr.
InstallOptimizedCode aquires ownership on the compilation info and deletes
it on return, tearing down the attached zone. The OptimizingCompiler
object is a zone object allocated in just that zone, so it also gets
deleted. Effectively, InstallOptimizedCode cleans up when it's done, so
the OptimizingCompiler object it receives is invalidated afterwards.
R=tit...@chromium.org
BUG=
Review URL: https://codereview.chromium.org/23769007
http://code.google.com/p/v8/source/detail?r=16609
Modified:
/branches/bleeding_edge/src/compiler.cc
/branches/bleeding_edge/src/compiler.h
=======================================
--- /branches/bleeding_edge/src/compiler.cc Mon Sep 9 16:34:40 2013 UTC
+++ /branches/bleeding_edge/src/compiler.cc Tue Sep 10 11:09:22 2013 UTC
@@ -1054,7 +1054,8 @@
}
-bool Compiler::InstallOptimizedCode(OptimizingCompiler*
optimizing_compiler) {
+Handle<Code> Compiler::InstallOptimizedCode(
+ OptimizingCompiler* optimizing_compiler) {
SmartPointer<CompilationInfo> info(optimizing_compiler->info());
// The function may have already been optimized by OSR. Simply continue.
// Except when OSR already disabled optimization for some reason.
@@ -1067,7 +1068,7 @@
PrintF(" as it has been disabled.\n");
}
ASSERT(!info->closure()->IsMarkedForInstallingRecompiledCode());
- return false;
+ return Handle<Code>::null();
}
Isolate* isolate = info->isolate();
@@ -1114,7 +1115,8 @@
// profiler ticks to prevent too soon re-opt after a deopt.
info->shared_info()->code()->set_profiler_ticks(0);
ASSERT(!info->closure()->IsMarkedForInstallingRecompiledCode());
- return status == OptimizingCompiler::SUCCEEDED;
+ return (status == OptimizingCompiler::SUCCEEDED) ? info->code()
+ : Handle<Code>::null();
}
@@ -1222,6 +1224,8 @@
FindReadyOSRCandidate(function,
pc_offset);
if (compiler != NULL) {
+ BailoutId ast_id = compiler->info()->osr_ast_id();
+
if (FLAG_trace_osr) {
PrintF("[COSR - optimization complete for ");
function->PrintName();
@@ -1230,11 +1234,11 @@
Deoptimizer::RevertInterruptCode(isolate, *unoptimized);
// TODO(titzer): don't install the OSR code into the function.
- bool succeeded = InstallOptimizedCode(compiler);
+ Handle<Code> result = InstallOptimizedCode(compiler);
isolate->optimizing_compiler_thread()->RemoveStaleOSRCandidates();
- if (!succeeded) {
+ if (result.is_null()) {
if (FLAG_trace_osr) {
PrintF("[COSR - optimization failed for ");
function->PrintName();
@@ -1242,15 +1246,12 @@
}
return Handle<Code>::null();
}
- Handle<Code> result = compiler->info()->code();
-
// Check the result matches our expectations, and don't use it
otherwise.
if (result->kind() == Code::OPTIMIZED_FUNCTION) {
DeoptimizationInputData* data =
DeoptimizationInputData::cast(result->deoptimization_data());
if (data->OsrPcOffset()->value() >= 0) {
- BailoutId ast_id = compiler->info()->osr_ast_id();
ASSERT(BailoutId(data->OsrAstId()->value()) == ast_id);
if (FLAG_trace_osr) {
PrintF("[COSR - entry at AST id %d, offset %d in optimized
code]\n",
=======================================
--- /branches/bleeding_edge/src/compiler.h Mon Sep 9 16:34:40 2013 UTC
+++ /branches/bleeding_edge/src/compiler.h Tue Sep 10 11:09:22 2013 UTC
@@ -625,7 +625,7 @@
bool is_toplevel,
Handle<Script> script);
- static bool InstallOptimizedCode(OptimizingCompiler* info);
+ static Handle<Code> InstallOptimizedCode(OptimizingCompiler* info);
static Handle<Code> CompileForOnStackReplacement(Handle<JSFunction>
function);
--
--
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