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Date: Wed, 15 Oct 2014 13:58:42 +0800
From: 黄建忠 <>
Subject: Webkit/JavascriptCore did not work with musl libc

Hi, all,
I build webkitgtk-2.4.4 and ewebkit2 under musl libc with
gcc-4.9.1(patched) and clang-3.5, the javascriptCore js engine did not
work as expected(with JIT enable or disable.)

for webkitgtk, jsc just output "Exception:" when run any js codes.
for ewebkit2, jsc just segfault with below backtrace:

#0 0x00000000008cf0c4 in WTFCrash ()
#1 0x000000000065bb72 in WTF::PassRefPtr<JSC::ProgramNode>
JSC::parse<JSC::ProgramNode>(JSC::VM*, JSC::SourceCode const&,
JSC::FunctionParameters*, JSC::Identifier const&,
JSC::JSParserStrictness, JSC::JSParserMode, JSC::ParserError&,
JSC::JSTextPosition*, bool) ()
#2 0x000000000077c6f0 in
JSC::BuiltinExecutables::createBuiltinExecutable(JSC::SourceCode const&,
JSC::Identifier const&) ()
#3 0x000000000077cc73 in
JSC::BuiltinExecutables::functionPrototypeApplyCodeExecutable() ()
#4 0x000000000076ee90 in
JSC::functionPrototypeApplyCodeGenerator(JSC::VM&) ()
#5 0x00000000007c1a78 in
JSC::JSGlobalObject*, JSC::JSFunction**, JSC::JSFunction**) ()
#6 0x0000000000682f89 in JSC::JSGlobalObject::reset(JSC::JSValue) ()
#7 0x00000000004f68c1 in JSC::JSGlobalObject::finishCreation(JSC::VM&) ()
#8 0x00000000004f600c in GlobalObject::finishCreation(JSC::VM&,
WTF::Vector<WTF::String, 0ul, WTF::CrashOnOverflow> const&) ()
#9 0x00000000004f01b8 in jscmain(int, char**) ()
#10 0x00000000004eff5d in main ()

The JSCore codes is too complex and I even can not figure out the buggy
codes quickly.

My environment is a customized linux with musl libc/wayland
only/gcc/clang/systemd and so on.

can Anybody who use a musl libc based distribution try and check it? for
webkitgtk2, there is no need to build it completely, just:
configure and "make jsc" then try it.

I am also working on it.

Huang JianZhong

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