https://bugs.kde.org/show_bug.cgi?id=503130
Bug ID: 503130
Summary: illumos gdbserver failures
Classification: Developer tools
Product: valgrind
Version: 3.25 GIT
Platform: Compiled Sources
OS: Unspecified
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Looking at mcinvokeWS
Valgrind runs and ends waiting in vgModuleLocal_do_syscall_for_client_WRK for
sys_pollsys.
progB is the invoker script which (on a quick reading) will try 60 times and
does a poll with a 0 timeout (nonblocking).
The Valgrind process is here
│ 143 syscall
│ 144
│ 145 2: /* In the range [2, 3), the syscall result is in %rax and
%rdx and C,
│ 146 but hasn't been committed to the thread state. If we get
│ 147 interrupted in this section then we'll just use values
saved in the
│ 148 ucontext structure.
│ 149
│ 150 Important note for this and the following section: Don't
add here
│ 151 any code that alters the carry flag or worse, call any
function.
│ 152 That would completely break the fixup after an interrupt.
*/
│ > 153 movq -40(%rbp), %rcx
That movq triggers a SIGSEGV. That should be getting the pointer to
VexGuestArchState, not something that should be going wrong.
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