639445 - improve signature handling and bug searching to handle symboless crashing frames

Status: RESOLVED WORKSFORME

(Socorro :: General, task)

Description

[timeless]

Signature	libc-2.11.2.so@0x75eea
UUID	e61ed929-ab7d-4e9a-a894-06c5c2110306
Time 	2011-03-06 11:27:52.66888
Crashing Thread
Frame 	Module 	Signature [Expand] 	Source
0 	libc-2.11.2.so 	libc-2.11.2.so@0x75eea 	
1 	seamonkey-bin 	nsAccUtils::GetRoleMapEntry 	accessible/src/base/nsAccUtils.cpp:656
2 	seamonkey-bin 	nsAccessibilityService::GetAccessible 	accessible/src/base/nsAccessibilityService.cpp:1503
3 	seamonkey-bin 	nsAccessibleTreeWalker::GetAccessible 	accessible/src/base/nsAccessibleTreeWalker.cpp:292

This stack trace should automatically find a bug with this summary:

[Bug 639300] Whenever i use a javascript heavy online mail like aol or new yahoo mail seamonkey crashes [@ strcmp | nsAccUtils::GetRoleMapEntry ]

The logic is roughly:
0. let search_string be empty (""); let the frame number be 0
1. if the crashing frame is in a module with symbols, go to 6
2. append ".*|\s*" to the search_string
3. get the next stack frame
4. if the frame depth exceeds limit give_up
5. go to 1
6. append the current frame to search_string
7. search for "[\s*@\s*"+search_string+"\s*]"

ideally you end up with a search for:
"[@.*|\s*nsAccUtils::GetRoleMapEntry\s*]" and it finds bug 639300

Ideally with this implemented the signature should also be changed eventually to something more meaningful based on this algorithm, but that can be done later.

Comment 1

[Lonnen :lonnen]

we've made a number of enhancements to both search and signature capabilities since then