https://bugs.kde.org/show_bug.cgi?id=498103
Bug ID: 498103
Summary: Clean up/merge linux sys_ptrace PRE/POST wrappers
Classification: Developer tools
Product: valgrind
Version: 3.24 GIT
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: jsew...@acm.org
Reporter: m...@klomp.org
Target Milestone: ---
Most linux arches have architecture specific POST/PRE(sys_ptrace) wrappers.
But they only handle a subset of (current) ptrace commands.
The linux-riscv port (bug #468575) adds a default case:
VG_(umsg)("WARNING: unhandled ptrace request %ld.\n", SARG1);
Which produces:
==173031== WARNING: unhandled ptrace request 16.
==173031== WARNING: unhandled ptrace request 17.
(which is PTRACE_ATTACH and PTRACE_DETACH also not explicitly handled by any
other linux arch)
linux-ppc32 doesn't wrap ptrace at all.
There are some generic ptrace helpers:
linux_POST_getregset/linux_PRE_setregset/linux_PRE_getregset/linux_POST_traceme
None of the newer linux ptrace commands are handled though.
For example:
PTRACE_GET_SYSCALL_INFO
PTRACE_SECCOMP_GET_FILTER
PTRACE_SETSIGMASK
PTRACE_GETSIGMASK
PTRACE_PEEKSIGINFO
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