NEW 16842
Hang in DRT in leaks mode due to signal handler doing unsafe things 
https://bugs.webkit.org/show_bug.cgi?id=16842
Summary Hang in DRT in leaks mode due to signal handler doing unsafe things
Mark Rowe (bdash)
Reported 2008-01-11 11:03:09 PST
static void crashHandler(int sig) { fprintf(stderr, "%s\n", strsignal(sig)); restoreColorSpace(0); exit(128 + sig); } If "crashHandler" is triggered from within malloc/realloc/free then any calls to those functions may deadlock on a malloc lock. "restoreColorSpace" can run arbitrary system code, and "exit" will lead to C++ destructors being called on global objects. Both of these could result in a malloc-related function being called.
Attachments
Sample from buildbot showing this hang occurring (6.17 KB, text/plain)
2008-01-11 11:03 PST, Mark Rowe (bdash) 		no flags
Details
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Mark Rowe (bdash)
Comment 1 2008-01-11 11:03:55 PST
Created attachment 18395 [details] Sample from buildbot showing this hang occurring
Mark Rowe (bdash)
Comment 2 2008-01-11 11:05:15 PST
I think that to call restoreColorSpace safely in the event of a crash it would need to be moved to a parent process that executes the real DRT. "_exit" can probably be used in place of "exit" to avoid the problems with that call.
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