Bug 4460 – Crash in JSC on CNN.com

• Status: RESOLVED
• Resolution: DUPLICATE
• Component: JavaScriptCore

[Oliver Hunt]

A crash occurs when rendering the linked url (minimal testcase up in a while).  Currently not sure what the 
root cause is, as crash is caused by stack munge.  

inside gdb we reach KJS::AssignBracketNode::evaluate at JavaScriptCore/kjs/nodes.cpp:1796, with no 
access to prior stack frames

[Oliver Hunt]

"Stack trace" (yeah it doesn't really exist)
Date/Time:      2005-08-17 10:51:08.238 +1200
OS Version:     10.4.2 (Build 8C46)
Report Version: 3

Command: Safari
Path:    /Applications/Safari.app/Contents/MacOS/Safari
Parent:  bash [219]

Version:        2.0 (412.2)
Build Version:  1
Project Name:   WebBrowser
Source Version: 4120200

PID:    9972
Thread: 0

Exception:  EXC_BAD_ACCESS (0x0001)
Codes:      KERN_PROTECTION_FAILURE (0x0002) at 0x00000118

Thread 0 Crashed:
0   com.apple.JavaScriptCore 	0x010424e8 KJS::AssignBracketNode::evaluate(KJS::ExecState*) + 2024 
(nodes.cpp:1796)

Thread 1:
0   libSystem.B.dylib        	0x9000a778 mach_msg_trap + 8
1   libSystem.B.dylib        	0x9000a6bc mach_msg + 60
2   com.apple.CoreFoundation 	0x9074b3d8 __CFRunLoopRun + 832
3   com.apple.CoreFoundation 	0x9074acdc CFRunLoopRunSpecific + 268
4   com.apple.Foundation     	0x9288bec4 -[NSRunLoop runMode:beforeDate:] + 172
5   com.apple.Foundation     	0x9288bdfc -[NSRunLoop run] + 76
6   com.apple.WebKit         	0x003c26a0 +[WebFileDatabase _syncLoop:] + 400 
(WebFileDatabase.m:295)
7   com.apple.Foundation     	0x9287cf34 forkThreadForFunction + 108
8   libSystem.B.dylib        	0x9002c3d4 _pthread_body + 96

Thread 2:
0   libSystem.B.dylib        	0x9000a778 mach_msg_trap + 8
1   libSystem.B.dylib        	0x9000a6bc mach_msg + 60
2   com.apple.CoreFoundation 	0x9074b3d8 __CFRunLoopRun + 832
3   com.apple.CoreFoundation 	0x9074acdc CFRunLoopRunSpecific + 268
4   com.apple.Foundation     	0x928a43e0 +[NSURLConnection(NSURLConnectionInternal) 
_resourceLoadLoop:] + 264
5   com.apple.Foundation     	0x9287cf34 forkThreadForFunction + 108
6   libSystem.B.dylib        	0x9002c3d4 _pthread_body + 96

Thread 3:
0   libSystem.B.dylib        	0x9000a778 mach_msg_trap + 8
1   libSystem.B.dylib        	0x9000a6bc mach_msg + 60
2   com.apple.CoreFoundation 	0x9074b3d8 __CFRunLoopRun + 832
3   com.apple.CoreFoundation 	0x9074acdc CFRunLoopRunSpecific + 268
4   com.apple.Foundation     	0x928a5520 +[NSURLCache _diskCacheSyncLoop:] + 152
5   com.apple.Foundation     	0x9287cf34 forkThreadForFunction + 108
6   libSystem.B.dylib        	0x9002c3d4 _pthread_body + 96

Thread 4:
0   libSystem.B.dylib        	0x9001efec select + 12
1   com.apple.CoreFoundation 	0x9075dc6c __CFSocketManager + 472
2   libSystem.B.dylib        	0x9002c3d4 _pthread_body + 96

Thread 5:
0   libSystem.B.dylib        	0x9002ca98 semaphore_wait_signal_trap + 8
1   libSystem.B.dylib        	0x9003127c pthread_cond_wait + 508
2   com.apple.Foundation     	0x928840a0 -[NSConditionLock lockWhenCondition:] + 68
3   com.apple.Syndication    	0x9b031ab0 -[AsyncDB _run:] + 192
4   com.apple.Foundation     	0x9287cf34 forkThreadForFunction + 108
5   libSystem.B.dylib        	0x9002c3d4 _pthread_body + 96

Thread 0 crashed with PPC Thread State 64:
  srr0: 0x00000000010424e8 srr1: 0x000000000200f030                        vrsave: 
0x0000000000000000
    cr: 0x24028422          xer: 0x0000000000000002   lr: 0x00000000010424e4  ctr: 
0x00000000010993ac
    r0: 0x000000000bf241c0   r1: 0x00000000bfffcbc0   r2: 0x0000000000000000   r3: 
0x000000000bf241c0
    r4: 0x00000000099b7ec0   r5: 0x00000000bfffcc9c   r6: 0x00000000bfffcc9c   r7: 
0x0000000000002b4f
    r8: 0x0000000000000001   r9: 0x00000000099b7ec0  r10: 0x00000000010225c4  r11: 
0x0000000001115df8
   r12: 0x00000000010993ac  r13: 0x0000000000000000  r14: 0x0000000000000001  r15: 
0x0000000000000001
   r16: 0x0000000000000000  r17: 0x0000000000000000  r18: 0x0000000000004833  r19: 
0x0000000000000000
   r20: 0x000000002444203f  r21: 0x00000000b74c66b4  r22: 0x0000000000000001  r23: 
0x0000000007912a40
   r24: 0x00000000a287d7f4  r25: 0x0000000000000001  r26: 0x0000000000000001  r27: 
0x00000000a287d7f4
   r28: 0x00000000bfffcbe0  r29: 0x00000000099d4cb0  r30: 0x0000000000000000  r31: 
0x000000000bf241c0

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[Oliver Hunt]

This is a regression -- Works fine in Safari 412

This looks similar to bug 4474

[Oliver Hunt]

(In reply to comment #3)
> This looks similar to bug 4474

I'm inclined to agree, just oing a build with the patch from 4474 to see if it fixes this problem...

[Oliver Hunt]

Patch for bug 4474 fixes bug 4460

*** This bug has been marked as a duplicate of 4474 ***