Bug 120890

Summary: Concurrent FTL causes !hasOptimizedReplacement() asserts in cti_optimize
Product: WebKit Reporter: Filip Pizlo <fpizlo>
Component: JavaScriptCoreAssignee: Filip Pizlo <fpizlo>
Severity: Normal CC: barraclough, ggaren, mark.lam, mhahnenberg, msaboff, oliver, sam
Priority: P2    
Version: 528+ (Nightly build)   
Hardware: All   
OS: All   
Bug Depends on:    
Bug Blocks: 112840    
Description Flags
the patch fpizlo: review+

Description Filip Pizlo 2013-09-06 13:12:56 PDT
This is because the FTL may install an optimized replacement while the DFG has already been jettisoned - so then the baseline JIT's cti_optimize sees an on-going DFG compile to reoptimize the code while also seeing an FTL optimized replacement.
Comment 1 Filip Pizlo 2013-09-06 13:13:51 PDT
Created attachment 210786 [details]
the patch
Comment 2 Filip Pizlo 2013-09-06 13:17:16 PDT
Comment on attachment 210786 [details]
the patch

Comment 3 Filip Pizlo 2013-09-06 13:19:32 PDT
Landed in http://trac.webkit.org/changeset/155209