[clang] Clear ASTContext::TUDecl in 'cleanup' for easier debugging (#191697)
While the ASTContext has more things inside, I think we should at least
clear the TUDecl so that when traversing the (dangling) AST would
immediately step on the null-dereference instead of chasing dangling
pointers and crash later.
I was bitten by this in #191058.
This commit should be NFC - assuming that people didn't traverse already
dangling ASTs.
[BOLT] Support non-null MCInst operands in annotation handling (#192188)
The annotation sentinel in BOLT is a null MCInst operand appended after
all prime operands. However, some architectures (e.g. Hexagon) use
non-null MCInst operands as legitimate prime operands for duplex
sub-instructions. The existing code treated any MCInst operand as the
annotation sentinel, causing duplex sub-instructions to be
misidentified.
In getNumPrimeOperands(), only treat a null MCInst operand as the
sentinel. In getAnnotationInstOp(), skip non-null MCInst operands when
searching for the annotation sentinel.
[mlir][tosa] Add `draft` information to specification version (#192122)
The draft flag can be used by useful to indicate that a specification
version is not yet finalized, and may be subject to change. This is
particularly important for serialized formats that offer guarantees
around backwards compatibility. By exposing `draft` information in the
specification version in the target environment, we can allow consumers
to query this information.
[libc] Fix strcasecmp/strncasecmp signedness and add tests (#192632)
Fixed character signedness bug in strcasecmp and strncasecmp
implementations in src/strings/ where characters > 127 were not
correctly handled.
Added LIBC_CRASH_ON_NULLPTR checks to both functions.
Enhanced unit tests in test/src/strings/ to be comprehensive without
duplicating basic case insensitivity tests.
Updated assertions in strcasecmp_test, strncasecmp_test, and strcmp_test
to check for sign instead of exact value.
filesystems/amazon-efs-utils: New port
Amazon EFS mount helper and watchdog utilities. Provides mount_efs(8) to mount
EFS filesystems over NFSv4.1, optionally via a local stunnel-like proxy
(efs-proxy) that terminates TLS 1.2 and handles IAM authentication using SigV4.
A watchdog daemon, started by mount_efs, monitors the proxy and restarts it if
it dies.
FreeBSD-specific adaptations:
- Binary installed as mount_efs, not mount.efs
- Uses /sbin/mount_nfs with nfsv4,minorversion=1,oneopenown,retrycnt=1
- Watchdog enumerates /var/run/efs state files cross-checked with
"mount -t nfs" (FreeBSD has no /proc/mounts and mount(8)/nfsstat(8)
do not expose the client TCP port)
- aarch64 build fix: the libc crate does not expose max_align_t for
aarch64-unknown-freebsd; substitute align_of::<u128>() in s2n-tl
Sponsored by: Netflix
[AArch64][llvm] Some instructions should be `HINT` aliases (NFC)
Implement the following instructions as a `HINT` alias instead of a
dedicated instruction in separate classes:
* `stshh`
* `stcph`
* `shuh`
* `tsb`
Updated all their helper methods too, and updated the `stshh` pseudo
expansion for the intrinsic to emit `HINT #0x30 | policy`.
Code in AArch64AsmPrinter::emitInstruction identified an initial BTI using a
broad bitmask on the HINT immediate, which also matched shuh/stcph (50..52)
This could move the patchable entry label after a non-BTI instruction.
Replaced it with an exact BTI check using the BTI HINT range (32..63) and
AArch64BTIHint::lookupBTIByEncoding(Imm ^ 32).
A following change will remove duplicated code and simplify.
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