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| author | David CARLIER <devnexen@gmail.com> | 2024-01-18 05:46:50 +0000 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-01-18 05:46:50 +0000 |
| commit | d83d1cb89cf80cda9d85e61c7b43f69446638865 (patch) | |
| tree | b69129b74d2ffd138a3c2f910c2dbe50825ac002 /compiler-rt | |
| parent | f01b6ca8bed49bdb957607456aed29ff8ee97109 (diff) | |
| download | llvm-d83d1cb89cf80cda9d85e61c7b43f69446638865.zip llvm-d83d1cb89cf80cda9d85e61c7b43f69446638865.tar.gz llvm-d83d1cb89cf80cda9d85e61c7b43f69446638865.tar.bz2 | |
[compiler-rt] making getrandom call blocking. (#78340)
except when `GRND_NONBLOCK` is present in the flags.
Diffstat (limited to 'compiler-rt')
| -rw-r--r-- | compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc b/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc index 77fa1b4..1b56beb 100644 --- a/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc +++ b/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc @@ -9965,7 +9965,13 @@ INTERCEPTOR(void, sl_free, void *sl, int freeall) { INTERCEPTOR(SSIZE_T, getrandom, void *buf, SIZE_T buflen, unsigned int flags) { void *ctx; COMMON_INTERCEPTOR_ENTER(ctx, getrandom, buf, buflen, flags); - SSIZE_T n = REAL(getrandom)(buf, buflen, flags); + // If GRND_NONBLOCK is set in the flags, it is non blocking. + static const int grnd_nonblock = 1; + SSIZE_T n; + if ((flags & grnd_nonblock)) + n = REAL(getrandom)(buf, buflen, flags); + else + n = COMMON_INTERCEPTOR_BLOCK_REAL(getrandom)(buf, buflen, flags); if (n > 0) { COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, n); } |