[VPlan] Add BranchOnTwoConds, use for early exit plans. (#172750)
This PR introduces a new BranchOnTwoConds VPInstruction, that takes 2
boolean operands and must be placed in a block with 3 successors.
If condition I is true, branches to successor I, otherwise falls through
to check the next condition. If both conditions are false, branch to the
third successor.
This new branch recipe is used for early-exit loops, to simplify the
representation in VPlan initially, by avoid the need for splitting the
middle block early on, in a way that preserves the single-exit block
property of regions. All exits still go through the latch block, but
they can go to more than 2 successors.
This idea was part of one of the original proposals for how to model
early exits in VPlan, but at that point in time, there was no good way
to handle this during code-gen, and we went with the early split-middle
block approach initially.
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HBSD: Disable SafeStack for the Unbound daemon
When Unbound is built with SafeStack, attempts to kill the running
daemon process with SIGTERM does not kill the process. Instead, the
daemon stops responding.
Signed-off-by: Shawn Webb <shawn.webb at hardenedbsd.org>
Reported-by: @northboot
issue: #110
MFC-to: 15-STABLE
(cherry picked from commit ee472934f961f24a1c4dee56e7bd8dbb0e50ce13)
Signed-off-by: Shawn Webb <shawn.webb at hardenedbsd.org>
ioctl.2: Mention EACCES
ioctls can fail with EACCES, see sys/kern/tty.c
PR: 239504
MFC after: 3 days
Reviewed by: ziaee
Reported by: Brennan Vincent <brennan at umanwizard.com>
Differential Revision: https://reviews.freebsd.org/D49072
cmd/ztest: avoid `PATH_MAX` stack allocation in `ztest_get_zdb_bin()` (#18085)
Calling realpath(path, buf) can trigger fortified header wrappers that
allocate a PATH_MAX-sized temporary buffer on the stack, exceeding the
4 KiB frame limit on some systems. Use the heap-allocating
realpath(path, NULL) form instead.
Sponsored-by: ERNW Research GmbH - https://ernw-research.de/
Signed-off-by: Alexander Moch <amoch at ernw.de>
Reviewed-by: Brian Behlendorf <behlendorf1 at llnl.gov>
Reviewed-by: Tony Hutter <hutter2 at llnl.gov>
[SelectionDAG] Rename OPC_EmitInteger8->OPC_EmitIntegerI8. NFC (#173832)
Same for OPC_EmitInteger16/32/64 and OPC_EmitStringInteger32.
This matches OPC_CheckTypeI32, OPC_EmitRegisterI32, etc.
