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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - [JavaScriptCore] JavaScriptCore is crashed when PARRELLEL GC is enabled."
href="https://bugs.webkit.org/show_bug.cgi?id=153819#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - [JavaScriptCore] JavaScriptCore is crashed when PARRELLEL GC is enabled."
href="https://bugs.webkit.org/show_bug.cgi?id=153819">bug 153819</a>
from <span class="vcard"><a class="email" href="mailto:xinchao.peng@samsung.com" title="Peng Xinchao <xinchao.peng@samsung.com>"> <span class="fn">Peng Xinchao</span></a>
</span></b>
<pre>Thanks a lot for your quickly response.
m_stack is the thread-local stack, you are right. I made a mistake before.
But we met some similar crashes like:
#0 0x47dac0f0 in isJSString (v=...) at /usr/src/debug/webkit2-efl-tv-152340_0.10.193.0+tv/Source/JavaScriptCore/runtime/JSString.h:493
No locals.
#1 visitChildren (cell=0xb3ad5018, visitor=...) at /usr/src/debug/webkit2-efl-tv-152340_0.10.193.0+tv/Source/JavaScriptCore/heap/SlotVisitor.cpp:80
No locals.
#2 JSC::SlotVisitor::drain (this=this@entry=0xa54e8) at /usr/src/debug/webkit2-efl-tv-152340_0.10.193.0+tv/Source/JavaScriptCore/heap/SlotVisitor.cpp:136
countdown = 32
#3 0x47dac3a0 in JSC::SlotVisitor::drainFromShared (this=0xa54e8, sharedDrainMode=JSC::SlotVisitor::SlaveDrain) at /usr/src/debug/webkit2-efl-tv-152340_0.10.193.0+tv/Source/JavaScriptCore/heap/SlotVisitor.cpp:225
No locals.
#4 0x47d9e2be in JSC::GCThread::gcThreadMain (this=0xa5550) at /usr/src/debug/webkit2-efl-tv-152340_0.10.193.0+tv/Source/JavaScriptCore/heap/GCThread.cpp:104
enabler = {m_stack = @0xa54e8}
#5 0x47f4c2cc in WTF::wtfThreadEntryPoint (param=0xa5f98) at /usr/src/debug/webkit2-efl-tv-152340_0.10.193.0+tv/Source/WTF/wtf/ThreadingPthreads.cpp:195
invocation = {m_ptr = 0xa5f98}
#6 0x42a56418 in start_thread (arg=0xb48ff070) at pthread_create.c:314
pd = 0xb48ff070
unwind_buf = {cancel_jmp_buf = {{jmp_buf = {-1081256549, 1235737603, -1265635216, 0, -1108857128, 338, -1238645568, 0, 0, -1265636436, 1, 0 <repeats 53 times>}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
not_first_call = <optimized out>
pagesize_m1 = <optimized out>
sp = <optimized out>
freesize = <optimized out>
__PRETTY_FUNCTION__ = "start_thread"
#7 0x429597c0 in ?? () at ../sysdeps/unix/sysv/linux/arm/clone.S:89 from ./symbols/lib/libc.so.6
No locals.
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
Our codes that have crashes are a little old.
Do you mean that the latest JavaScriptCore does not have this kind of crash?
Is this crash PARALLEL GC's issue?
If PARALLEL GC is disabled, could the crash be avoided?
Because I have poor knowledge about GC, could you give me some suggestions?
Thanks very much!</pre>
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