Adding a commenting utility to record BytecodeGenerator comments
with opcodes that are emitted. Presently, the comments can only
be constant strings. Adding comments for opcodes is optional.
If a comment is added, the comment will be printed following the
opcode when CodeBlock::dump() is called.
This utility is disabled by default, and is only meant for VM
development purposes. It should not be enabled for product builds.
To enable this utility, set ENABLE_BYTECODE_COMMENTS in CodeBlock.h
to 1.
https://bugs.webkit.org/show_bug.cgi?id=90095
Patch by Mark Lam <mark.lam@apple.com> on 2012-06-28
Reviewed by Geoffrey Garen.
* GNUmakefile.list.am:
* JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj:
* JavaScriptCore.xcodeproj/project.pbxproj:
* bytecode/CodeBlock.cpp:
(JSC::CodeBlock::dumpBytecodeCommentAndNewLine): Dumps the comment.
(JSC):
(JSC::CodeBlock::printUnaryOp): Add comment dumps.
(JSC::CodeBlock::printBinaryOp): Add comment dumps.
(JSC::CodeBlock::printConditionalJump): Add comment dumps.
(JSC::CodeBlock::printCallOp): Add comment dumps.
(JSC::CodeBlock::printPutByIdOp): Add comment dumps.
(JSC::CodeBlock::dump): Add comment dumps.
(JSC::CodeBlock::CodeBlock):
(JSC::CodeBlock::commentForBytecodeOffset):
Finds the comment for an opcode if available.
(JSC::CodeBlock::dumpBytecodeComments):
For debugging whether comments are collected.
It is not being called anywhere.
* bytecode/CodeBlock.h:
(CodeBlock):
(JSC::CodeBlock::bytecodeComments):
* bytecode/Comment.h: Added.
(JSC):
(Comment):
* bytecompiler/BytecodeGenerator.cpp:
(JSC::BytecodeGenerator::BytecodeGenerator):
(JSC::BytecodeGenerator::emitOpcode): Calls emitComment().
(JSC):
(JSC::BytecodeGenerator::emitComment): Adds comment to CodeBlock.
(JSC::BytecodeGenerator::prependComment):
Registers a comment for emitComemnt() to use later.
* bytecompiler/BytecodeGenerator.h:
(BytecodeGenerator):
(JSC::BytecodeGenerator::emitComment):
(JSC::BytecodeGenerator::prependComment):
These are inlined versions of these functions that nullify them
when ENABLE_BYTECODE_COMMENTS is 0.
(JSC::BytecodeGenerator::comments):
git-svn-id: http://svn.webkit.org/repository/webkit/trunk@121480 268f45cc-cd09-0410-ab3c-d52691b4dbfc
9 files changed
