Changeset 155711 in webkit for trunk/Source/JavaScriptCore/bytecode/CodeBlock.h

Timestamp:

Sep 13, 2013, 11:03:55 AM (12 years ago)

Author:

[email protected]

Message:

fourthTier: Change JSStack to grow from high to low addresses
​https://bugs.webkit.org/show_bug.cgi?id=118758

Reviewed by Oliver Hunt.

Changed the JSC stack to grow down. Effectively the JSC stack frame is flipped from
what it was. See JSStack.h for the new offsets. Changed JSStack begin() and end()
to be getBaseOfStack() and getLimitOfStack(). Most of the changes are address or offset
calculation changes. Decoupled a local register ordinal (loop variable or array index)
from the offset into the callFrame using localToOperand() and the inverse operandToLocal().

• assembler/MacroAssembler.h:

(JSC::MacroAssembler::trustedImm32ForShift):
(JSC::MacroAssembler::lshiftPtr): Added to create scaled addresses with a negative index

• assembler/MacroAssemblerX86_64.h:

(JSC::MacroAssemblerX86_64::lshift64): Added to create scaled addresses with a negative index

• assembler/X86Assembler.h:

(JSC::X86Assembler::shlq_i8r): Added to create scaled addresses with a negative index

• bytecode/CodeBlock.cpp:

(JSC::CodeBlock::dumpBytecode):

• bytecode/CodeBlock.h:

(JSC::unmodifiedArgumentsRegister):
(JSC::CodeBlock::isCaptured):

• bytecode/CodeOrigin.h:

(JSC::CodeOrigin::stackOffset):

• bytecode/Operands.h:

(JSC::localToOperand):
(JSC::operandIsLocal):
(JSC::operandToLocal):
(JSC::operandIsArgument):
(JSC::operandToArgument):
(JSC::argumentToOperand):

• bytecode/VirtualRegister.h: Made InvalidVirtualRegister a positive value that fits in

31 bits since it can be placed into the 31 bit field "stackOffset" in struct InlineCallFrame.

• bytecompiler/BytecodeGenerator.cpp:

(JSC::BytecodeGenerator::addVar):
(JSC::BytecodeGenerator::BytecodeGenerator):
(JSC::BytecodeGenerator::createLazyRegisterIfNecessary):
(JSC::BytecodeGenerator::newRegister):
(JSC::BytecodeGenerator::emitNewArray):

• bytecompiler/BytecodeGenerator.h:

(JSC::CallArguments::registerOffset):

• bytecompiler/NodesCodegen.cpp:

(JSC::CallArguments::CallArguments):

• dfg/DFGByteCodeParser.cpp:

(JSC::DFG::ByteCodeParser::findArgumentPositionForLocal):
(JSC::DFG::ByteCodeParser::addCall):
(JSC::DFG::ByteCodeParser::handleCall):
(JSC::DFG::ByteCodeParser::handleInlining):
(JSC::DFG::ByteCodeParser::parseBlock):
(JSC::DFG::ByteCodeParser::InlineStackEntry::InlineStackEntry):

• dfg/DFGJITCompiler.cpp:

(JSC::DFG::JITCompiler::compileFunction):

• dfg/DFGOSREntry.cpp:

(JSC::DFG::prepareOSREntry):

• dfg/DFGOSRExitCompiler32_64.cpp:

(JSC::DFG::OSRExitCompiler::compileExit):

• dfg/DFGOSRExitCompiler64.cpp:

(JSC::DFG::OSRExitCompiler::compileExit):

• dfg/DFGOperations.cpp:
• dfg/DFGScoreBoard.h:

(JSC::DFG::ScoreBoard::allocate):

• dfg/DFGSpeculativeJIT.cpp:

(JSC::DFG::SpeculativeJIT::compileGetByValOnArguments):

• dfg/DFGSpeculativeJIT.h:

(JSC::DFG::SpeculativeJIT::callFrameSlot):
(JSC::DFG::SpeculativeJIT::argumentSlot):
(JSC::DFG::SpeculativeJIT::callFrameTagSlot):
(JSC::DFG::SpeculativeJIT::callFramePayloadSlot):
(JSC::DFG::SpeculativeJIT::argumentTagSlot):
(JSC::DFG::SpeculativeJIT::argumentPayloadSlot):

• dfg/DFGSpeculativeJIT32_64.cpp:

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

• dfg/DFGSpeculativeJIT64.cpp:

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

• dfg/DFGValidate.cpp:

(JSC::DFG::Validate::reportValidationContext):

• ftl/FTLLink.cpp:

(JSC::FTL::link):

• heap/ConservativeRoots.cpp:

(JSC::ConservativeRoots::genericAddSpan):

• interpreter/CallFrame.cpp:

(JSC::CallFrame::frameExtentInternal):

• interpreter/CallFrame.h:

(JSC::ExecState::init):
(JSC::ExecState::argumentOffset):
(JSC::ExecState::argumentOffsetIncludingThis):
(JSC::ExecState::argIndexForRegister):

• interpreter/Interpreter.cpp:

(JSC::loadVarargs):
(JSC::Interpreter::dumpRegisters):

• interpreter/JSStack.cpp:

(JSC::JSStack::JSStack):
(JSC::JSStack::~JSStack):
(JSC::JSStack::growSlowCase):
(JSC::JSStack::gatherConservativeRoots):
(JSC::JSStack::releaseExcessCapacity):
(JSC::JSStack::disableErrorStackReserve):

• interpreter/JSStack.h:

(JSC::JSStack::getBaseOfStack):
(JSC::JSStack::getLimitOfStack):
(JSC::JSStack::size):
(JSC::JSStack::end):
(JSC::JSStack::containsAddress):
(JSC::JSStack::lowAddress):
(JSC::JSStack::highAddress):
(JSC::JSStack::reservationEnd):
(JSC::JSStack::shrink):
(JSC::JSStack::grow):

• interpreter/JSStackInlines.h:

(JSC::JSStack::getTopOfFrame):
(JSC::JSStack::pushFrame):
(JSC::JSStack::popFrame):
(JSC::JSStack::installTrapsAfterFrame):

• interpreter/StackVisitor.cpp:

(JSC::inlinedFrameOffset):
(JSC::StackVisitor::readInlinedFrame):

• jit/JIT.cpp:

(JSC::JIT::privateCompile):

• jit/JITCall.cpp:

(JSC::JIT::compileLoadVarargs):
(JSC::JIT::compileOpCall):

• jit/JITCall32_64.cpp:

(JSC::JIT::compileLoadVarargs):
(JSC::JIT::compileOpCall):

• jit/JITOpcodes.cpp:

(JSC::JIT::emit_op_create_activation):
(JSC::JIT::emit_op_get_argument_by_val):

• jit/JITOpcodes32_64.cpp:

(JSC::JIT::emit_op_get_argument_by_val):

• jit/JITStubs.cpp:

(JSC::throwExceptionFromOpCall):
(JSC::DEFINE_STUB_FUNCTION):

• jit/ThunkGenerators.cpp:

(JSC::arityFixup):

• llint/LLIntData.cpp:

(JSC::LLInt::Data::performAssertions):

• llint/LLIntSlowPaths.cpp:

(JSC::LLInt::LLINT_SLOW_PATH_DECL):
(JSC::LLInt::genericCall):

• llint/LowLevelInterpreter.asm:
• llint/LowLevelInterpreter32_64.asm:
• llint/LowLevelInterpreter64.asm:
• runtime/ArgList.cpp:

(JSC::ArgList::getSlice):
(JSC::MarkedArgumentBuffer::slowAppend):

• runtime/ArgList.h:

(JSC::MarkedArgumentBuffer::MarkedArgumentBuffer):
(JSC::MarkedArgumentBuffer::slotFor):
(JSC::MarkedArgumentBuffer::mallocBase):
(JSC::ArgList::at):

• runtime/Arguments.cpp:

(JSC::Arguments::tearOff):

• runtime/ArrayConstructor.cpp:

(JSC::constructArrayWithSizeQuirk):

• runtime/CommonSlowPaths.cpp:

(JSC::SLOW_PATH_DECL):

• runtime/JSActivation.h:

(JSC::JSActivation::registersOffset):
(JSC::JSActivation::tearOff):
(JSC::JSActivation::isValidIndex):

• runtime/JSArray.h:

(JSC::constructArrayNegativeIndexed): New method to create an array from registers that grow down.

• runtime/JSGlobalObject.cpp:

(JSC::JSGlobalObject::globalExec):

• runtime/JSGlobalObject.h:

(JSC::constructArrayNegativeIndexed):

• runtime/JSString.h:
• runtime/Operations.h:

(JSC::jsStringFromRegisterArray):

• runtime/SymbolTable.h:

(JSC::SharedSymbolTable::captureCount):

File:

• trunk/Source/JavaScriptCore/bytecode/CodeBlock.h (modified) (2 diffs)

trunk/Source/JavaScriptCore/bytecode/CodeBlock.h

@@ -87 +87 @@
 class RepatchBuffer;
 
-inline int unmodifiedArgumentsRegister(int argumentsRegister) { return argumentsRegister - 1; }
+inline int unmodifiedArgumentsRegister(int argumentsRegister) { return argumentsRegister + 1; }
 
 static ALWAYS_INLINE int missingThisObjectMarker() { return std::numeric_limits<int>::max(); }
@@ -387 +387 @@
             return false;
 
-        return operand >= symbolTable()->captureStart()
-        && operand < symbolTable()->captureEnd();
+        return operand <= symbolTable()->captureStart()
+            && operand > symbolTable()->captureEnd();
     }