Bug 40858 – Reproducible crash in com.apple.JavaScriptCore 0x005d7164 JSC::JSObject::defaultValue(JSC::ExecState*, JSC::PreferredPrimitiveType) const + 1764

• Status: RESOLVED
• Resolution: FIXED
• Component: JavaScriptCore

I get a reproducible crash when visiting http://translate.google.com/translate?js=y&prev=_t&hl=en&ie=UTF-8&layout=1&eotf=1&u=http%3A%2F%2Fjablickar.cz%2Fcesky-uzivatel-testuje-iphone-4-ukazky-fotografii-a-videa-z-iphone-4-v-clanku%2F&sl=auto&tl=en with the current WebKit Nightly (Safari Version 4.1 (4533.16, r61351) on Mac OS X 10.4.11 PowerPC G4)

Date/Time:      2010-06-18 23:08:14.813 +0200
OS Version:     10.4.11 (Build 8S165)
Report Version: 4

Command: Safari
Path:    /Applications/Safari.app/Contents/MacOS/Safari
Parent:  WindowServer [60]

Version: r61351 (61351)

PID:    3409
Thread: 0

Exception:  EXC_BAD_ACCESS (0x0001)
Codes:      KERN_PROTECTION_FAILURE (0x0002) at 0x00000008

Thread 0 Crashed:
0   com.apple.JavaScriptCore 	0x005d7164 JSC::JSObject::defaultValue(JSC::ExecState*, JSC::PreferredPrimitiveType) const + 1764
1   com.apple.JavaScriptCore 	0x0050a85c JSC::JSObject::toPrimitive(JSC::ExecState*, JSC::PreferredPrimitiveType) const + 44
2   com.apple.JavaScriptCore 	0x005d605c JSC::JSObject::toString(JSC::ExecState*) const + 60
3   com.apple.JavaScriptCore 	0x0065258c JSC::stringProtoFuncSubstring(JSC::ExecState*) + 284
4   com.apple.JavaScriptCore 	0x0059df04 JSC::Interpreter::privateExecute(JSC::Interpreter::ExecutionFlag, JSC::RegisterFile*, JSC::ExecState*, JSC::JSValue*) + 59252
5   com.apple.JavaScriptCore 	0x005a4f70 JSC::Interpreter::execute(JSC::ProgramExecutable*, JSC::ExecState*, JSC::ScopeChainNode*, JSC::JSObject*, JSC::JSValue*) + 800
6   com.apple.JavaScriptCore 	0x00543ef8 JSC::evaluate(JSC::ExecState*, JSC::ScopeChain&, JSC::SourceCode const&, JSC::JSValue) + 488

See attached crash log

Created attachment 59157 [details]
crash log for #40858

crash log for the bug

[Alexey Proskuryakov]

With a local debug build of r61268, I'm getting an assertion failure:

ASSERTION FAILED: this[RegisterFile::ScopeChain].Register::scopeChain()
(/Users/ap/Safari/OpenSource/JavaScriptCore/interpreter/CallFrame.h:45 JSC::ScopeChainNode* JSC::ExecState::scopeChain() const)

[Alexey Proskuryakov]

<rdar://problem/8108986>

[Alexey Proskuryakov]

Same crash on Intel in bug 40874.

[Oliver Hunt]

I know what this bug is and am working on it.

[Oliver Hunt]

Created attachment 59194 [details]
Patch

[WebKit Review Bot]

Attachment 59194 [details] did not pass style-queue:

Failed to run "['WebKitTools/Scripts/check-webkit-style', '--no-squash']" exit_code: 1
JavaScriptCore/interpreter/Interpreter.cpp:3650:  vm_throw is incorrectly named. Don't use underscores in your identifier names.  [readability/naming] [4]
JavaScriptCore/interpreter/Interpreter.cpp:3802:  vm_throw is incorrectly named. Don't use underscores in your identifier names.  [readability/naming] [4]
JavaScriptCore/interpreter/Interpreter.cpp:4124:  vm_throw is incorrectly named. Don't use underscores in your identifier names.  [readability/naming] [4]
Total errors found: 3 in 5 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Eric Seidel (no email)]

Attachment 59194 [details] did not build on mac:
Build output: http://webkit-commit-queue.appspot.com/results/3301444

[Early Warning System Bot]

Attachment 59194 [details] did not build on qt:
Build output: http://webkit-commit-queue.appspot.com/results/3316437

[Oliver Hunt]

Created attachment 59195 [details]
Patch

[WebKit Review Bot]

Attachment 59195 [details] did not pass style-queue:

Failed to run "['WebKitTools/Scripts/check-webkit-style', '--no-squash']" exit_code: 1
JavaScriptCore/interpreter/Interpreter.cpp:3650:  vm_throw is incorrectly named. Don't use underscores in your identifier names.  [readability/naming] [4]
JavaScriptCore/interpreter/Interpreter.cpp:3802:  vm_throw is incorrectly named. Don't use underscores in your identifier names.  [readability/naming] [4]
JavaScriptCore/interpreter/Interpreter.cpp:4124:  vm_throw is incorrectly named. Don't use underscores in your identifier names.  [readability/naming] [4]
Total errors found: 3 in 5 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[WebKit Review Bot]

Attachment 59194 [details] did not build on gtk:
Build output: http://webkit-commit-queue.appspot.com/results/3308438

[WebKit Review Bot]

Attachment 59194 [details] did not build on win:
Build output: http://webkit-commit-queue.appspot.com/results/3282403

[Zoltan Herczeg]

Am I see right that the new "RegisterFile* CallFrame::registerFile()" only used for debug purposes? Shouldn't we put NDEBUG protection around it? Or do you plan to use it in other places?

[Oliver Hunt]

Created attachment 59201 [details]
Patch

[WebKit Review Bot]

Attachment 59201 [details] did not pass style-queue:

Failed to run "['WebKitTools/Scripts/check-webkit-style', '--no-squash']" exit_code: 1
JavaScriptCore/interpreter/Interpreter.cpp:3650:  vm_throw is incorrectly named. Don't use underscores in your identifier names.  [readability/naming] [4]
JavaScriptCore/interpreter/Interpreter.cpp:3802:  vm_throw is incorrectly named. Don't use underscores in your identifier names.  [readability/naming] [4]
JavaScriptCore/interpreter/Interpreter.cpp:4124:  vm_throw is incorrectly named. Don't use underscores in your identifier names.  [readability/naming] [4]
Total errors found: 3 in 5 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Geoffrey Garen]

Comment on attachment 59201 [details]
Patch

+            CHECK_FOR_EXCEPTION();
+            return 0;

You want VM_THROW_EXCEPTION() instead.

r=me

[Oliver Hunt]

Committed r61553: <http://trac.webkit.org/changeset/61553>

[Geoffrey Garen]

*** Bug 40874 has been marked as a duplicate of this bug. ***

[WebKit Review Bot]

http://trac.webkit.org/changeset/61553 might have broken Tiger Intel Release
The following changes are on the blame list:
http://trac.webkit.org/changeset/61553
http://trac.webkit.org/changeset/61554
http://trac.webkit.org/changeset/61555
http://trac.webkit.org/changeset/61556
http://trac.webkit.org/changeset/61557