Changeset 61430 in webkit for trunk/JavaScriptCore/bytecode/CodeBlock.cpp

Timestamp:

Jun 18, 2010, 1:14:23 PM (15 years ago)

Author:

[email protected]

Message:

2010-06-17 Oliver Hunt <​[email protected]>

Reviewed by Sam Weinig.

Don't throw away exception information for functions that use exceptions
​https://bugs.webkit.org/show_bug.cgi?id=40786

Simple patch to stop JSC from throwing away the exception information
of a function that uses "exceptiony" features like try and throw. This
is a speed up for catching expressions but it's difficult to quantify as
the old cost of reparsing is amortised over all exceptions caught in the
effected function.

• bytecode/CodeBlock.cpp: (JSC::CodeBlock::reparseForExceptionInfoIfNecessary):
• bytecompiler/BytecodeGenerator.cpp: (JSC::BytecodeGenerator::generate): (JSC::BytecodeGenerator::emitCatch):
• bytecompiler/BytecodeGenerator.h: (JSC::BytecodeGenerator::emitThrow):

File:

• trunk/JavaScriptCore/bytecode/CodeBlock.cpp (modified) (1 diff)

trunk/JavaScriptCore/bytecode/CodeBlock.cpp

@@ -1525 +1525 @@
         return;
 
+    ASSERT(!m_rareData || !m_rareData->m_exceptionHandlers.size());
     ScopeChainNode* scopeChain = callFrame->scopeChain();
     if (m_needsFullScopeChain) {