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Bug 1124070 - Handle baseline eval frames in JitProfilingFrameIterator. r=jandem

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This commit is contained in:
Kannan Vijayan 2015-01-28 14:32:42 -05:00
parent 62c0790149
commit f68fe4820f
2 changed files with 18 additions and 10 deletions
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3
js/src/jit/JitFrameIterator.h
View File

@ -279,7 +279,8 @@ class JitProfilingFrameIterator
inline JitFrameLayout *framePtr();
inline JSScript *frameScript();
bool tryInitWithPC(void *pc);
bool tryInitWithTable(JitcodeGlobalTable *table, void *pc, JSRuntime *rt);
bool tryInitWithTable(JitcodeGlobalTable *table, void *pc, JSRuntime *rt,
bool forLastCallSite);
public:
JitProfilingFrameIterator(JSRuntime *rt,

25
js/src/jit/JitFrames.cpp
View File

@ -2780,15 +2780,12 @@ JitProfilingFrameIterator::JitProfilingFrameIterator(
// Profiler sampling must NOT be suppressed if we are here.
MOZ_ASSERT(rt->isProfilerSamplingEnabled());
// Since the frame is on stack, and is a jit frame, it MUST have Baseline jitcode.
MOZ_ASSERT(frameScript()->hasBaselineScript());
// Try initializing with sampler pc
if (tryInitWithPC(state.pc))
return;
// Try initializing with sampler pc using native=>bytecode table.
if (tryInitWithTable(table, state.pc, rt))
if (tryInitWithTable(table, state.pc, rt, /* forLastCallSite = */ false))
return;
// Try initializing with lastProfilingCallSite pc
@ -2797,15 +2794,24 @@ JitProfilingFrameIterator::JitProfilingFrameIterator(
return;
// Try initializing with lastProfilingCallSite pc using native=>bytecode table.
if (tryInitWithTable(table, lastCallSite, rt))
if (tryInitWithTable(table, lastCallSite, rt, /* forLastCallSite = */ true))
return;
}
// In some rare cases (e.g. baseline eval frame), the callee script may
// not have a baselineScript. Treat this is an empty frame-sequence and
// move on.
if (!frameScript()->hasBaselineScript()) {
type_ = JitFrame_Entry;
fp_ = nullptr;
returnAddressToFp_ = nullptr;
return;
}
// If nothing matches, for now just assume we are at the start of the last frame's
// baseline jit code.
type_ = JitFrame_BaselineJS;
returnAddressToFp_ = frameScript()->baselineScript()->method()->raw();
//++(*this);
}
template <typename FrameType, typename ReturnType=CommonFrameLayout*>
@ -2862,7 +2868,7 @@ JitProfilingFrameIterator::tryInitWithPC(void *pc)
}
// Check for containment in Baseline jitcode second.
if (callee->baselineScript()->method()->containsNativePC(pc)) {
if (callee->hasBaselineScript() && callee->baselineScript()->method()->containsNativePC(pc)) {
type_ = JitFrame_BaselineJS;
returnAddressToFp_ = pc;
return true;
@ -2872,7 +2878,8 @@ JitProfilingFrameIterator::tryInitWithPC(void *pc)
}
bool
JitProfilingFrameIterator::tryInitWithTable(JitcodeGlobalTable *table, void *pc, JSRuntime *rt)
JitProfilingFrameIterator::tryInitWithTable(JitcodeGlobalTable *table, void *pc, JSRuntime *rt,
bool forLastCallSite)
{
if (!pc)
return false;
@ -2896,7 +2903,7 @@ JitProfilingFrameIterator::tryInitWithTable(JitcodeGlobalTable *table, void *pc,
if (entry.isBaseline()) {
// If looked-up callee doesn't match frame callee, don't accept lastProfilingCallSite
if (entry.baselineEntry().script() != callee)
if (forLastCallSite && entry.baselineEntry().script() != callee)
return false;
type_ = JitFrame_BaselineJS;