Description of problem: To debug firefox crashes (another story) I am using gdb on it. Unfortunately, execution of firefox is frequently interrupted by gdb which says: [New Thread 0x7fe1aea75950 (LWP 26614)] Cannot get thread event message: debugger service failed and goes into command mode as if this were a breakpoint. Version-Release number of selected component (if applicable): gdb-6.8-29.fc10.x86_64 How reproducible: Whenever I try it. Steps to Reproduce: 1. run firefox 2. discover the firefox process ID 3. $ gdb /usr/lib64/firefox-3.0.5/firefox FIREFOXPID 4. (gdb) break gdk_x_error 5. (gdb) continue 6. browse and wait for the message from gdb Actual results: [New Thread 0x7fe1aea75950 (LWP 26614)] Cannot get thread event message: debugger service failed Typing "continue" to gdb will move past this but it will stop again. Expected results: Execution continues until a breakpoint. Additional info: A relevant message on the GDB mailing list: http://sourceware.org/ml/gdb/2008-12/msg00001.html I tried running GDB as root but that seemed to change nothing.
Running firefox under GDB for many hours on F11 this way without any problem. gdb-6.8.50.20090302-21.fc11.x86_64 kernel-2.6.29.2-126.fc11.x86_64 On F10 there was a problem with utrace in its kernels, I had to use custom kernel builds for GDB with utrace disabled using this kernel.spec patch: http://people.redhat.com/jkratoch/kernel-ptrace.patch
Does Rolland McGrath know this? What is the status of this? NEXTRELEASE? It surprises me that there is no evidence of others experiencing this (only 3 on CC list). Is this a duplicate of some other report? Maybe nobody is trying to fix Firefox on F10. If so, too bad: it crashes way too often (not only on F10, mind you). Firefox problems seem to be quite complex so reliable tools are needed. (The Firefox bugs that are hitting me are actually in the libraries -- I'm not trying to disparage Firefox.)
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