Bug 91281 – JSC: OfflineASM Pretty printing and commenting enhancements

• Status: RESOLVED
• Resolution: FIXED
• Component: JavaScriptCore

[Mark Lam]

It would be nice to be have the output of the OfflineASM be more prettily formatted for human consumption.  Also, it would be nice to be able to more easily add annotations in the LLInt that will show up in the OfflineASM output for debugging and analysis purposes.

[Mark Lam]

Created attachment 152353 [details]
Fix.

[WebKit Review Bot]

Attachment 152353 [details] did not pass style-queue:

Failed to run "['Tools/Scripts/check-webkit-style', '--diff-files', u'Source/JavaScriptCore/ChangeLog', u'Source..." exit_code: 1
Source/JavaScriptCore/llint/LLIntOfflineAsmConfig.h:96:  Extra space before )  [whitespace/parens] [2]
Total errors found: 1 in 20 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Mark Lam]

The 1 style error is because of I have macros that looks like this:

#define OFFLINE_ASM_BEGIN   asm (
#define OFFLINE_ASM_END     );

The style checker is complaining about the spaces before the ");" because it mistook it for an argument list.  I this case, I think the style violation can be allowed as an exception.

[Geoffrey Garen]

Comment on attachment 152353 [details]
Fix.

View in context: https://bugs.webkit.org/attachment.cgi?id=152353&action=review

Looks good to me. I'd like Phil to take a look too, since he's more familiar with the Ruby driver. I've CC'd him.

One comment below.

> Source/JavaScriptCore/llint/LowLevelInterpreter32_64.asm:305
> +    loadp CodeBlock[cfr], t2                // t2<CodeBlock> = cfr.CodeBlock
> +    loadi CodeBlock::m_numVars[t2], t2      // t2<size_t> = t2<CodeBlock>.m_numVars

It looks like these comments parrot the LL assembly language in a slightly modified form. Perhaps comment dumping mode should just dump the LL assembly. I could see myself using that when I debugged something in the interpreter.

[WebKit Review Bot]

Comment on attachment 152353 [details]
Fix.

Clearing flags on attachment: 152353

Committed r122650: <http://trac.webkit.org/changeset/122650>

[WebKit Review Bot]

All reviewed patches have been landed.  Closing bug.