[all-commits] [llvm/llvm-project] 82af00: [safestack] Various 32-bit Linux fixes (#99455)

[Rainer Orth via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 82af008d9891bc109ba218fb546170d83c5de9a2
      https://github.com/llvm/llvm-project/commit/82af008d9891bc109ba218fb546170d83c5de9a2
  Author: Rainer Orth <ro at gcc.gnu.org>
  Date:   2024-07-19 (Fri, 19 Jul 2024)

  Changed paths:
    M compiler-rt/lib/safestack/safestack_platform.h
    M compiler-rt/lib/safestack/safestack_util.h

  Log Message:
  -----------
  [safestack] Various 32-bit Linux fixes (#99455)

When enabling 32-bit testing on Linux/i386 and Linux/sparc, many tests
`FAIL`:

- All Linux/i386 tests `FAIL` with ``` safestack CHECK failed:
/vol/llvm/src/llvm-project/local/compiler-rt/lib/safestack/safestack.cpp:95
MAP_FAILED != addr ``` because the safestack `mmap` implementation
doesn't work there. This patch adjusts it to match the
`sanitizer_linux.cpp.c` one.
- On 32-bit Linux/sparc, the `pthread*.c` tests `FAIL` because a `tid_t`
(`uint64_t`) `tid` arg was passed to `syscall(SYS_tgkill)` while `tid`
is actually a `pid_t` (`int`). Fixed by adding a cast.

Tested on `x86_64-pc-linux-gnu` (32 and 64-bit) and
`sparc64-unknown-linux-gnu` (32 and 64-bit).



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