void CallLinkStatus::computeDFGStatuses(
CodeBlock* dfgCodeBlock, CallLinkStatus::ContextMap& map)
{
#if ENABLE(DFG_JIT)
RELEASE_ASSERT(dfgCodeBlock->jitType() == JITCode::DFGJIT);
CodeBlock* baselineCodeBlock = dfgCodeBlock->alternative();
for (auto iter = dfgCodeBlock->callLinkInfosBegin(); !!iter; ++iter) {
CallLinkInfo& info = **iter;
CodeOrigin codeOrigin = info.codeOrigin();
// Check if we had already previously made a terrible mistake in the FTL for this
// code origin. Note that this is approximate because we could have a monovariant
// inline in the FTL that ended up failing. We should fix that at some point by
// having data structures to track the context of frequent exits. This is currently
// challenging because it would require creating a CodeOrigin-based database in
// baseline CodeBlocks, but those CodeBlocks don't really have a place to put the
// InlineCallFrames.
CodeBlock* currentBaseline =
baselineCodeBlockForOriginAndBaselineCodeBlock(codeOrigin, baselineCodeBlock);
ExitSiteData exitSiteData;
{
ConcurrentJITLocker locker(currentBaseline->m_lock);
exitSiteData = computeExitSiteData(
locker, currentBaseline, codeOrigin.bytecodeIndex);
}
{
ConcurrentJITLocker locker(dfgCodeBlock->m_lock);
map.add(info.codeOrigin(), computeFor(locker, dfgCodeBlock, info, exitSiteData));
}
}
#else
UNUSED_PARAM(dfgCodeBlock);
#endif // ENABLE(DFG_JIT)
if (verbose) {
dataLog("Context map:\n");
ContextMap::iterator iter = map.begin();
ContextMap::iterator end = map.end();
for (; iter != end; ++iter) {
dataLog(" ", iter->key, ":\n");
dataLog(" ", iter->value, "\n");
}
}
}
CallLinkStatus CallLinkStatus::computeFor(
CodeBlock* profiledBlock, unsigned bytecodeIndex, const CallLinkInfoMap& map)
{
ConcurrentJITLocker locker(profiledBlock->m_lock);
UNUSED_PARAM(profiledBlock);
UNUSED_PARAM(bytecodeIndex);
UNUSED_PARAM(map);
#if ENABLE(DFG_JIT)
ExitSiteData exitSiteData = computeExitSiteData(locker, profiledBlock, bytecodeIndex);
if (exitSiteData.m_takesSlowPath)
return takesSlowPath();
CallLinkInfo* callLinkInfo = map.get(CodeOrigin(bytecodeIndex));
if (!callLinkInfo)
return computeFromLLInt(locker, profiledBlock, bytecodeIndex);
return computeFor(locker, *callLinkInfo, exitSiteData);
#else
return CallLinkStatus();
#endif
}
