The sampling profile should have an option to sample from C frames.

[Keith Miller]

The sampling profile should have an option to sample from C frames.

[Keith Miller]

Created attachment 300160 [details]
WIP

[Keith Miller]

Created attachment 300224 [details]
Patch

[Keith Miller]

Created attachment 300238 [details]
Patch

[Keith Miller]

Created attachment 300239 [details]
Patch

[Saam Barati]

Comment on attachment 300239 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=300239&action=review

r=me

> Source/JavaScriptCore/runtime/SamplingProfiler.cpp:228
> +            resetAtMachineFrame();

I think you may want your own version of resetAtMachineFrame that also calls into the parent's version. The version here should probably veryify that:
 "isValidFramePointer(m_machineFrame)"

> Source/JavaScriptCore/runtime/SamplingProfiler.cpp:608
> +                stackTrace.frames.last().frameType = FrameType::Host;

Why not add a new frame type?
You can make the various functions that look at frame type for the inspector just skip over C frames for now.

> Source/JavaScriptCore/runtime/SamplingProfiler.cpp:742
> +#if OS(DARWIN)
> +        if (Options::sampleCCode()) {
> +            const char* mangledName = nullptr;
> +            const char* cxaDemangled = nullptr;
> +            Dl_info info;
> +            if (dladdr(cCodePC, &info) && info.dli_sname)
> +                mangledName = info.dli_sname;
> +            if (mangledName) {
> +                cxaDemangled = abi::__cxa_demangle(mangledName, 0, 0, 0);
> +                return String(cxaDemangled ? cxaDemangled : mangledName);
> +            }
> +        }
> +#endif

Ditto about the FrameType.

[Keith Miller]

Created attachment 300362 [details]
Patch for landing

[Keith Miller]

Created attachment 300364 [details]
Patch for landing

[Keith Miller]

Created attachment 300365 [details]
Patch for landing

[WebKit Commit Bot]

Comment on attachment 300365 [details]
Patch for landing

Clearing flags on attachment: 300365

Committed r211542: <http://trac.webkit.org/changeset/211542>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.