Paul Floyd [Sun, 7 Dec 2025 21:11:19 +0000 (22:11 +0100)]
Darwin: make fixup_macho_loadcmds.c less version dependent
Remove a load of DARWIN_VERS checks. It's a pointless maintenance
burden. Add suppport for SDK >= 10.4.6. First step to adding
macOS 10.14 Mojave support.
Paul Floyd [Sun, 7 Dec 2025 20:59:40 +0000 (21:59 +0100)]
FreeBSD and Darwin: clean up fake sigreturn syscall numbers
Firstly make them a bit more similar. Secondly, switch Darwin
from using __NR_MAXSYSCALL which changes with every Darwin version
to using 1000 like FreeBSD.
Change NEWS for macOS 10.13, it has now progressed beyond
'preliminary'.
Paul Floyd [Sun, 7 Dec 2025 08:52:04 +0000 (09:52 +0100)]
Darwin syscall: initial wrapper for mach_voucher_extract_attr_recipe
It doesn't do any checking yet. However, with this change running
TextEditor with --tool=none gets as far as drawing a white box on
the screen. Then it fails because there is a missing mach trap handler
for
Paul Floyd [Sun, 7 Dec 2025 07:50:32 +0000 (08:50 +0100)]
Darwin mach_msg_host: move assign_port_name to post
There's a GrP comment saying that assign_port_name should only be called on success.
And indeed when it is called in the PRE and it can't find the info for the port
then the code will assert.
Paul Floyd [Sun, 7 Dec 2025 06:54:23 +0000 (07:54 +0100)]
Darwin stacktraces: add a hack to prevent segfault when dereferencing bp
Can now turn a couple more helgrind tests back on.
Need to get to the bottom of the bp dereferencing issue. There is a test
already so it us supposed to be safe.
Paul Floyd [Sat, 6 Dec 2025 09:50:38 +0000 (10:50 +0100)]
FreeBSD client stack: add an assert to check the stringtable doesn't get overwritten
There's already an assert that the stringsize calculated matches the
stringsize writte. This adds a check that the pointer table area
does not overwrite the stringtable (that is, that the NULL pointer after the
last auxv entry pointer does not overwrite the first string [either the
interpreter or argv[0])
Paul Floyd [Fri, 5 Dec 2025 20:59:34 +0000 (21:59 +0100)]
Darwin: also clean up client stack creation
Make stringbase and strtab be based off clstack_end + 1
rather than clstack_end. clstack_end is the address of the
last byte of the stack, not one past the end of the stack.
That means that it is not word aligned. Adding 1 makes
the calculation word aligned.
Depending on the length of the string table with rounding
it could happen that the executable_path pointer would
overwrite the start of argv[0] in the string table.
I think that that there are supposed to be 0-16 bytes between
the end of the pointers and the string table (or is that
ELF?).
Paul Floyd [Fri, 5 Dec 2025 12:47:19 +0000 (13:47 +0100)]
Darwin: no need to turn off alignment assert in leak check
Mixed up 2 files with previous commit. This also contains
a missing proto and the previous commit fixes issues with badly formed
segments. Needs more investigation.
Florian Krohm [Wed, 3 Dec 2025 22:26:57 +0000 (22:26 +0000)]
Change the data type of libvex_Backend::emit.
Both the s390 and arm insn emitters need to know the host's hardware
capabilities. Today, these are provided by means of global variables
s390_host_hwcaps and arm_hwcaps. To eliminate that kludge the emit
function is changed. Instead of passing VexEndness we now pass a pointer
to VexArchInfo which provides both the endianess and hardware capabilities.
Those global variables will be removed in a followup patch.
Now that the stfle insn is available we can use it to tell uas how
many double words are needed to store all facility bits. Hence,
S390_NUM_FACILITY_DW can go.
Paul Floyd [Thu, 27 Nov 2025 06:22:18 +0000 (07:22 +0100)]
Darwin: many fixes for OSX 10.13
Most of these changes are from Louis Brunner's GitHub repo.
The most imortant changes are to the memory space and to the code
related to getting the host filename during startup. This means
that when Valgrind crashes or hits an assert we now get a legible
host stacktrrace.
Paul Floyd [Thu, 27 Nov 2025 12:14:43 +0000 (13:14 +0100)]
Massif regtest: filter ignore functions, part 1
This is mainly for Darwin which has numerous leaks that
need to be ignored. This filter removes all --ignore-fn options
from the "out" expecteds. This should allow adding endless
functions to ignore in the vgtest files without having to
also update the out.exp files as well.
Part 2 will be for the verbose output which adds ignore files
to the stderr.exp references.
Martin Cermak [Thu, 27 Nov 2025 08:25:07 +0000 (09:25 +0100)]
Provide missing syswraps for file_getattr and file_setattr
The syscalls take fd and path. If path is absolute, fd is not
used. If path is empty, fd can be AT_FDCWD or any valid fd which
will be used to get/set attributes on.
Paul Floyd [Wed, 26 Nov 2025 20:22:51 +0000 (21:22 +0100)]
Darwin new/delete wrappers: fix on x86
Untested code is always full of surprises.
Darwin x86 doesn't use size_t for the size (where 32bit
size_t is unsigned int and 64but size_t is unsigned long).
Instead it uses unsigned long on both platforms.
That changes the mangled name. It's all 'm' for unsigned long
rather than 32bit 'j' for unsigned short and 64bit 'm'
for unsigned long.
Support pmaxsd and pminsd instructions in guest_x86_toIR.c and host_x86_isel.c
and modify the none/tests/x86/sse4-x86.stdout.exp to match pmaxsd and
pminsd support.
Refactor none/tests/amd64/sse4-64.c and none/tests/x86/sse4-x86.c
to use a common none/tests/sse4-common.h header. This eliminates
code redundancies and makes it easier to add new SSE4 tests for both
architectures more easily. The shared header contains common helper functions,
type definitions, and test macros previously duplicated in both files.
Paul Floyd [Tue, 25 Nov 2025 20:04:17 +0000 (21:04 +0100)]
FreeBSD regtest: turn off a few gdbserver tests on systems with sysctl debug.ptrace_attach_transparent
FreeBSD 15 (out soon) and 16 (the dev branch) have changed the behaviour
of ptrace. When vgdb uses ptrace to get Valgrind to poll gdbserver
to get out of blocking syscalls the client may return a bogus result
from the syscall.
Setting the syscall to 0 turns off this change and all 3 affected testcases
should return to normal behaviour. However, setting the syscall needs root
privileges. So I've added a test to see if the syscall is present and set
to 1. If it is the prereq is not satisfied.
Paul Floyd [Tue, 25 Nov 2025 20:03:35 +0000 (21:03 +0100)]
FreeBSD startup: do not skip exename if it is not present
Don't remember why this code was there. Allowing no exename
is a bad idea (argv[0] will be NULL). I don't think there is
a need any more for this permissiveness.
Martin Cermak [Tue, 25 Nov 2025 14:07:09 +0000 (15:07 +0100)]
Memory allegedly uninitialized after ioctl(PROCMAP_QUERY)
Fix ioctl(fd, PROCMAP_QUERY, ...) so that valgrind correctly considers
memory referenced by vma_name_size and vma_name_addr members of struct
procmap_query as initialized by ioctl().
Extend ioctl syscall wrappers with needed PRE_MEM_WRITE() and
mainly POST_MEM_WRITE(). Add a testcase.
Florian Krohm [Tue, 25 Nov 2025 13:50:37 +0000 (13:50 +0000)]
s390: PFPO facility related cleanups (BZ 509562)
The PFPO facility is always present on the supported machines.
- Remove VEX_HWCAPS_S390X_PFPO, s390_host_has_pfpo and EmFail_S390X_pfpo
- Update tests/s390x_features.c and none/tests/s390x/pfpo
- Update memcheck/tests/vbit-test
Part of fixing https://bugs.kde.org/show_bug.cgi?id=509562
Florian Krohm [Tue, 25 Nov 2025 13:23:52 +0000 (13:23 +0000)]
s390: load/store-on-condition / high-word facility related cleanups (BZ 509562)
The load/store-on-condition / high-word facility is always present on the
supported machines.
- Remove VEX_HWCAPS_S390X_LSC and s390_host_has_lsc
- Update tests/s390x_features.c and none/tests/s390x/high-word
Part of fixing https://bugs.kde.org/show_bug.cgi?id=509562
Florian Krohm [Tue, 25 Nov 2025 13:03:37 +0000 (13:03 +0000)]
s390: floating-point-support-enhancement facility related cleanups (BZ 509562)
The floating-point-support-enhancement facility is always present on the
supported machines.
- Remove VEX_HWCAPS_S390X_FGX and s390_host_has_fgx
- Remove wrapper functions: s390_emit_LGDRw, s390_emit_LDGRw
Part of fixing https://bugs.kde.org/show_bug.cgi?id=509562
Florian Krohm [Tue, 25 Nov 2025 09:14:11 +0000 (09:14 +0000)]
s390: general-instructions-extension facility related cleanups (BZ 509562)
The general-instructions-extension facility is always present on the
supported machines.
- Remove VEX_HWCAPS_S390X_GIE and s390_host_has_gie
- Remove wrapper functions: s390_emit_MFYw, s390_emit_MHYw, s390_emit_MSFIw
- Update tests/s390x_features.c
Part of fixing https://bugs.kde.org/show_bug.cgi?id=509562
Paul Floyd [Tue, 25 Nov 2025 07:20:06 +0000 (08:20 +0100)]
Bug 512571 - regtest problems with darwin dsymuti
There was alrwady a stderr filter for dsymutil, but only for DRD.
So I moved that to tests/filter_stderr_basic.in
I added single quotes around $dir in tests/vg_regtest.in for
arch_test and os_test. That now prevents directory names containing
spaces from being seen as more than one argument.
Florian Krohm [Mon, 24 Nov 2025 18:39:39 +0000 (18:39 +0000)]
s390: ETF2/ETF3-enhancement facilities related cleanups (BZ 509562)
The ETF2/ETF3-enhancement facilities are always present on
the supported machines.
- Remove VEX_HWCAPS_S390X_ETF2 and s390_host_has_etf2
- Remove VEX_HWCAPS_S390X_ETF3 and s390_host_has_etf3
- Update tests/s390x_features.c
Part of fixing https://bugs.kde.org/show_bug.cgi?id=509562
Florian Krohm [Mon, 24 Nov 2025 18:16:22 +0000 (18:16 +0000)]
s390: message-security-assist facility related cleanups (BZ 509562)
The message-security-assist facility is always present on
the supported machines.
- Remove VEX_HWCAPS_S390X_MSA and s390_host_has_msa
- Remove EmFail_S390X_msa
Part of fixing https://bugs.kde.org/show_bug.cgi?id=509562
Florian Krohm [Mon, 24 Nov 2025 17:56:44 +0000 (17:56 +0000)]
s390: MSA4 facility related cleanups (BZ 509562)
The message-security-assist-extension-4 facility is always present on
the supported machines.
- Remove VEX_HWCAPS_S390X_MSA4 and s390_host_has_msa4
- Remove EmFail_S390X_msa4
Part of fixing https://bugs.kde.org/show_bug.cgi?id=509562
Florian Krohm [Mon, 24 Nov 2025 16:40:23 +0000 (16:40 +0000)]
s390: decimal-floating-point facility related cleanups (BZ 509562)
The decimal-floating-point facility is always present on the supported
machines.
- Remove VEX_HWCAPS_S390X_DFP and s390_host_has_dfp
- Remove EmFail_S390X_DFP_insn
- Update tests/s390x_features.c
Part of fixing https://bugs.kde.org/show_bug.cgi?id=509562
Paul Floyd [Mon, 24 Nov 2025 11:55:15 +0000 (12:55 +0100)]
Darwin regtest: make a variant of none require-text-symbol-2
This test looks for a bogus symbol in libc.so. But Darwin
has no libc.so, so make this variant that looks in libsystem_c.dylib.
The -2 variant now has a !os_test darwin prereq and the new -3 variant
has an os_test darwin prereq.
Florian Krohm [Sun, 23 Nov 2025 22:51:53 +0000 (22:51 +0000)]
s390: floating-point-extension facility related cleanups (BZ 509562)
The floating-point-extension facility is always present on the supported
machines.
- Remove s390_host_has_fpext and VEX_HWCAPS_S390X_FPEXT
- Remove EmWarn_S390X_fpext_rounding and EmFail_S390X_fpext
- Remove testscases none/tests/s390x/fpext_fail and fpext_warn
- Update tests/s390x_features.c and memcheck/tests/vbit-test
Part of fixing https://bugs.kde.org/show_bug.cgi?id=509562
Paul Floyd [Fri, 21 Nov 2025 21:02:41 +0000 (22:02 +0100)]
Darwin syscalls: correctly set EIP/RIP in ML_(fixup_guest_state_to_restart_syscall)
The code was using arch->vex.guest_IP_AT_SYSCALL but that got cleaned out on amd64
a while ago. Use EIP/RIP - 2 instead, like other x86 and amd64 platforms.
Florian Krohm [Fri, 21 Nov 2025 16:54:13 +0000 (16:54 +0000)]
s390: STFLE related cleanups (BZ 509562)
The STFLE insn is always present on the supported machines.
- Remove s390_host_has_stfle, VEX_HWCAPS_S390X_STFLE, and EmFail_S390X_stfle
- Update tests/s390x_features.c
Part of fixing https://bugs.kde.org/show_bug.cgi?id=509562
Florian Krohm [Fri, 21 Nov 2025 15:51:53 +0000 (15:51 +0000)]
s390: long displacement facility related cleanups (BZ 509562)
The long displacement facilities are always present on the supported
machines.
- Remove s390_host_has_ldisp and VEX_HWCAPS_S390X_LDISP
- Update tests/s390x_features.c
Part of fixing https://bugs.kde.org/show_bug.cgi?id=509562
Florian Krohm [Wed, 19 Nov 2025 13:27:51 +0000 (13:27 +0000)]
s390: Set min. required machine model to z196. (BZ 509562)
Bail out if machine is too old.
This is the 1st installment of a series of patches raising the min.
required machine model to z196.
Part of fixing https://bugs.kde.org/show_bug.cgi?id=509562
Paul Floyd [Wed, 19 Nov 2025 08:00:54 +0000 (09:00 +0100)]
Darwin macho debuginfo: fix RW load count
Was counting all RW loads. However, load_thing_file() has the extra
requirement that the filesize be greater than 0. If the filesize is
0 then an anon map gets done and the associated segment doesn't get
flagged as being RW.
Also add the prot value to the macho load_segment mmap traces.
Florian Krohm [Sat, 15 Nov 2025 12:27:27 +0000 (12:27 +0000)]
s390x: Support FPC rounding mode 0b111
When get_bfp_rounding_mode_from_fpc was added Irrm_PREPARE_SHORTER was
not available. The rounding mode 0x111 in the FPC was mapped to Irrm_NEAREST
with fingers crossed.
When Irrm_PREPARE_SHORTER was added later on it was forgotten to adjust this
function. Now fixed. Comments and bfp-convert testcase adjusted.
Paul Floyd [Tue, 11 Nov 2025 14:57:14 +0000 (15:57 +0100)]
Darwin: update wqthread_hijack arguments
Taken from Louis Brunner's GitHub repo.
Now when I launch TextEdit with memcheck it doesnt fail straight away.
I get a few memcheck errors and then it hangs. Looks like the 3 threads
are all running JITted code with one blocked having access errors.
Paul Floyd [Sun, 9 Nov 2025 18:28:13 +0000 (19:28 +0100)]
Darwin: rework syscall arg handling
There were numerous issues, particularly with syscall SYS_syscall
and the scalar tests. Only tested on amd64, I don't have access to
an OSX 10.12 or earlier machine to do any testing.
The key elements in VG_(client_syscall) are, when the PRE wrapper
does not handle the syscall
1. getSyscallArgsFromGuestState
2. getSyscallArgLayout
3. call PRE wrapper
What has changed
----------------
struct SyscallArgs now like FreeBSD, stores both the
canonical_sysno (which is the final syscall number, never
SYS_syscall) and the original_sysno (which can be SYS_syscall).
These get set in getSyscallArgsFromGuestState which has
changed accordingly.
getSyscallArgsFromGuestState has changed to always get the layout
coresponding to the canonical layout. This was the cause of the
problems with the scalar tests - the arguments were effectively
out by one.
Many subsequent changes to the scalar test, filter and expected.
The scalar test still isn't quite right. __NR_kevent_qos is missing
a scalar error from argument 6. That's the one with special case
handling because it is a register argument for a normal syscall
but a stack argument for syscall SYS_syscall.
Paul Floyd [Fri, 7 Nov 2025 19:40:21 +0000 (20:40 +0100)]
FreeBSD regtest: add comments for a sched_setaffinity equivalent
Trying to get a fix for nlvgdbsigqueue flakiness.
FreeBSD has cpuset_setaffinity which is similar to sched_setaffinity.
Howeever, it needs privileges in order to be used. So I've just put the
code there in a comment.