[valgrind] [Bug 383723] SIGILL failure with ud2 opcode _dispatch_kq_init (in /usr/lib/system/libdispatch.dylib) (macOS)
https://bugs.kde.org/show_bug.cgi?id=383723 --- Comment #23 from Alexandru Croitor--- Created attachment 109081 --> https://bugs.kde.org/attachment.cgi?id=109081=edit Patch implementing kevent_qos Attaching patch that implements the kevent_qos syscall. I'm not certain that everything is correct (never worked on valgrind), but using existing syscalls as a guidance, the README, and checking the xnu source code, this is what I came up with. Using the minimal test case I attached, this gets past the ud2 crash, and gives another crash which I think is the same as https://bugs.kde.org/show_bug.cgi?id=380269 ==75877== Thread 2: ==75877== Invalid read of size 4 ==75877==at 0x1014B62B1: _pthread_wqthread (in /usr/lib/system/libsystem_pthread.dylib) ==75877==by 0x1014B607C: start_wqthread (in /usr/lib/system/libsystem_pthread.dylib) ==75877== Address 0x18 is not stack'd, malloc'd or (recently) free'd ==75877== ==75877== ==75877== Process terminating with default action of signal 11 (SIGSEGV) ==75877== Access not within mapped region at address 0x18 ==75877==at 0x1014B62B1: _pthread_wqthread (in /usr/lib/system/libsystem_pthread.dylib) ==75877==by 0x1014B607C: start_wqthread (in /usr/lib/system/libsystem_pthread.dylib) On an unrelated note, I think that the code for kevent64 is incorrect, due to it having 7 arguments as per https://developer.apple.com/legacy/library/documentation/Darwin/Reference/ManPages/man2/kevent.2.html whereas the valgrind code only reads / processes 6 arguments (PRE_REG_READ6). -- You are receiving this mail because: You are watching all bug changes.
[valgrind] [Bug 383723] SIGILL failure with ud2 opcode _dispatch_kq_init (in /usr/lib/system/libdispatch.dylib) (macOS)
https://bugs.kde.org/show_bug.cgi?id=383723 --- Comment #22 from Alexandru Croitor--- Ok, so the issue seems to be that the kevent_qos syscall is not implemented in syswrap-darwin.c. -- You are receiving this mail because: You are watching all bug changes.
[valgrind] [Bug 383723] SIGILL failure with ud2 opcode _dispatch_kq_init (in /usr/lib/system/libdispatch.dylib) (macOS)
https://bugs.kde.org/show_bug.cgi?id=383723 --- Comment #21 from Alexandru Croitor--- The source code for the top-most symbol _dispatch_kq_init present in the backtrace of the crash can be found at https://opensource.apple.com/source/libdispatch/libdispatch-703.50.37/src/source.c.auto.html . By correlating the disassembly at https://gist.github.com/Placinta/208f706f6bdefb0e6706a741ceedc271 and the linked source code, the execution of the ud2 instruction is the result of calling DISPATCH_CLIENT_CRASH due to a failed kevent_qos call. The ud2 instruction would cause the macOS crash reporter to launch under normal execution (no valgrind or lldb), and print out the ""Failed to initalize workqueue kevent" message. Thus the u2 instruction is a red herring, and someone needs to figure out why does the kevent_qos call fail. -- You are receiving this mail because: You are watching all bug changes.
[valgrind] [Bug 383723] SIGILL failure with ud2 opcode _dispatch_kq_init (in /usr/lib/system/libdispatch.dylib) (macOS)
https://bugs.kde.org/show_bug.cgi?id=383723 Alexandru Croitorchanged: What|Removed |Added CC||alexandru.croi...@qt.io --- Comment #20 from Alexandru Croitor --- Created attachment 109078 --> https://bugs.kde.org/attachment.cgi?id=109078=edit Minimal example to reproduce issue Attaching a minimal example to reproduce the crash (2 lines of code really). -- You are receiving this mail because: You are watching all bug changes.
[valgrind] [Bug 383723] SIGILL failure with ud2 opcode _dispatch_kq_init (in /usr/lib/system/libdispatch.dylib) (macOS)
https://bugs.kde.org/show_bug.cgi?id=383723 --- Comment #19 from Philippe Waroquiers--- (In reply to Rhys Kidd from comment #18) > Phillipe, it is fine to reference this bug in NEWS as being related, but > please don't close this bug. The current underlying issue remains unresolved. Ok. Then I think it is better to keep NEWS as is (i.e. not listing this bug as fixed). Thanks -- You are receiving this mail because: You are watching all bug changes.
[valgrind] [Bug 383723] SIGILL failure with ud2 opcode _dispatch_kq_init (in /usr/lib/system/libdispatch.dylib) (macOS)
https://bugs.kde.org/show_bug.cgi?id=383723 --- Comment #18 from Rhys Kidd--- Phillipe, it is fine to reference this bug in NEWS as being related, but please don't close this bug. The current underlying issue remains unresolved. Per my commit message at the time: > commit ed6ad13bc8f2b33c493a72db9915f3681002e8d0 > Author: Rhys Kidd > Date: Sun Oct 1 18:56:05 2017 -0400 > >Fix missing workq_ops operations (macOS) > >Related to discussion in bz#383723. Patch based upon one provided by >Andy Maloney. -- You are receiving this mail because: You are watching all bug changes.
[valgrind] [Bug 383723] SIGILL failure with ud2 opcode _dispatch_kq_init (in /usr/lib/system/libdispatch.dylib) (macOS)
https://bugs.kde.org/show_bug.cgi?id=383723 Philippe Waroquierschanged: What|Removed |Added CC||philippe.waroquiers@skynet. ||be --- Comment #17 from Philippe Waroquiers --- John Reiser suggested to use this bug as a reference in NEWS for n-i-bz "Fix missing workq_ops operations (macOS)" Rhys, can you tell if it is appropriate to reference this bug and close the bug ? -- You are receiving this mail because: You are watching all bug changes.
[valgrind] [Bug 383723] SIGILL failure with ud2 opcode _dispatch_kq_init (in /usr/lib/system/libdispatch.dylib) (macOS)
https://bugs.kde.org/show_bug.cgi?id=383723 René Hansenchanged: What|Removed |Added CC||ren...@gmail.com --- Comment #16 from René Hansen --- I ran into this bug today and have a small non-qt program that reproduces the same error as well. It's a simple cli tool that prints out some OpenCL information; basically just wrapping stock OpenCL functions. Tool: https://github.com/rhardih/opencl_util/blob/master/src/oclinf.c Source of interest: https://github.com/rhardih/opencl_util/blob/master/src/opencl_util.c#L554 Output with error: https://gist.github.com/rhardih/939ebfdc6b10acf732b62a805bd7ea93 -- You are receiving this mail because: You are watching all bug changes.
[valgrind] [Bug 383723] SIGILL failure with ud2 opcode _dispatch_kq_init (in /usr/lib/system/libdispatch.dylib) (macOS)
https://bugs.kde.org/show_bug.cgi?id=383723 akb825changed: What|Removed |Added CC||akb...@gmail.com -- You are receiving this mail because: You are watching all bug changes.
[valgrind] [Bug 383723] SIGILL failure with ud2 opcode _dispatch_kq_init (in /usr/lib/system/libdispatch.dylib) (macOS)
https://bugs.kde.org/show_bug.cgi?id=383723 Rhys Kiddchanged: What|Removed |Added Summary|SIGILL failure with ud2 |SIGILL failure with ud2 |opcode (macOS) |opcode _dispatch_kq_init ||(in ||/usr/lib/system/libdispatch ||.dylib) (macOS) -- You are receiving this mail because: You are watching all bug changes.