Changeset 193649 in webkit for trunk/Source/JavaScriptCore/llint/LowLevelInterpreter.asm

Timestamp:

Dec 7, 2015, 2:03:48 PM (10 years ago)

Author:

[email protected]

Message:

Add op_watchdog opcode that is generated when VM has a watchdog
​https://bugs.webkit.org/show_bug.cgi?id=151954

Reviewed by Mark Lam.

Source/JavaScriptCore:

This patch also makes watchdog a private member
of VM and adds a getter function.

• API/JSContextRef.cpp:

(JSContextGroupClearExecutionTimeLimit):

• bytecode/BytecodeList.json:
• bytecode/BytecodeUseDef.h:

(JSC::computeUsesForBytecodeOffset):
(JSC::computeDefsForBytecodeOffset):

• bytecode/CodeBlock.cpp:

(JSC::CodeBlock::dumpBytecode):

• bytecompiler/BytecodeGenerator.cpp:

(JSC::BytecodeGenerator::emitLoopHint):
(JSC::BytecodeGenerator::emitWatchdog):
(JSC::BytecodeGenerator::retrieveLastBinaryOp):

• bytecompiler/BytecodeGenerator.h:
• dfg/DFGByteCodeParser.cpp:

(JSC::DFG::ByteCodeParser::parseBlock):

• dfg/DFGCapabilities.cpp:

(JSC::DFG::capabilityLevel):

• dfg/DFGSpeculativeJIT32_64.cpp:

(JSC::DFG::SpeculativeJIT::compile):

• dfg/DFGSpeculativeJIT64.cpp:

(JSC::DFG::SpeculativeJIT::compile):

• ftl/FTLLowerDFGToLLVM.cpp:

(JSC::FTL::DFG::LowerDFGToLLVM::compileCheckWatchdogTimer):

• jit/JIT.cpp:

(JSC::JIT::privateCompileMainPass):
(JSC::JIT::privateCompileSlowCases):

• jit/JIT.h:
• jit/JITOpcodes.cpp:

(JSC::JIT::emit_op_loop_hint):
(JSC::JIT::emitSlow_op_loop_hint):
(JSC::JIT::emit_op_watchdog):
(JSC::JIT::emitSlow_op_watchdog):
(JSC::JIT::emit_op_new_regexp):

• llint/LLIntSlowPaths.cpp:

(JSC::LLInt::LLINT_SLOW_PATH_DECL):

• llint/LowLevelInterpreter.asm:
• runtime/VM.cpp:

(JSC::VM::ensureWatchdog):

• runtime/VM.h:

(JSC::VM::watchdog):

• runtime/VMEntryScope.cpp:

(JSC::VMEntryScope::VMEntryScope):
(JSC::VMEntryScope::~VMEntryScope):

• runtime/VMInlines.h:

(JSC::VM::shouldTriggerTermination):

Source/WebCore:

No new tests because JSC already has tests for this.

• bindings/js/WorkerScriptController.cpp:

(WebCore::WorkerScriptController::scheduleExecutionTermination):
(WebCore::WorkerScriptController::isTerminatingExecution):

File:

• trunk/Source/JavaScriptCore/llint/LowLevelInterpreter.asm (modified) (2 diffs)

trunk/Source/JavaScriptCore/llint/LowLevelInterpreter.asm

@@ -1439 +1439 @@
 _llint_op_loop_hint:
     traceExecution()
+    checkSwitchToJITForLoop()
+    dispatch(1)
+
+
+_llint_op_watchdog:
+    traceExecution()
     loadp CodeBlock[cfr], t1
     loadp CodeBlock::m_vm[t1], t1
-    loadp VM::watchdog[t1], t0
+    loadp VM::m_watchdog[t1], t0
     btpnz t0, .handleWatchdogTimer
 .afterWatchdogTimerCheck:
-    checkSwitchToJITForLoop()
     dispatch(1)
 .handleWatchdogTimer:
@@ -1453 +1458 @@
 .throwHandler:
     jmp _llint_throw_from_slow_path_trampoline
+
 
 _llint_op_switch_string: