https://sourceware.org/git/gitweb.cgi?p=valgrind.git;h=de408f75bf28d76a0016325b75f14be45631472a
commit de408f75bf28d76a0016325b75f14be45631472a
Author: Miao Wang <sha...@gm...>
Date: Mon Aug 26 22:08:43 2024 +0800
sys_statx: support for statx(fd, NULL, AT_EMPTY_PATH)
statx(fd, NULL, AT_EMPTY_PATH) is supported since Linux 6.11 and this
patch adds the support to valgrind, so that it won't complain when
NULL is used as |filename| and |flags| includes AT_EMPTY_PATH.
Ref: commit 0ef625bba6fb ("vfs: support statx(..., NULL, AT_EMPTY_PATH, ...)")
Signed-off-by: Miao Wang <sha...@gm...>
Diff:
---
coregrind/m_syswrap/syswrap-linux.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/coregrind/m_syswrap/syswrap-linux.c b/coregrind/m_syswrap/syswrap-linux.c
index 9f3c51c179..4533855998 100644
--- a/coregrind/m_syswrap/syswrap-linux.c
+++ b/coregrind/m_syswrap/syswrap-linux.c
@@ -4209,8 +4209,12 @@ PRE(sys_statx)
// in which it passes NULL for both filename and buf, and then looks at the
// return value, so as to determine whether or not this syscall is supported.
Bool both_filename_and_buf_are_null = ARG2 == 0 && ARG5 == 0;
+ Bool statx_null_path = (ARG2 == 0) && (ARG3 & VKI_AT_EMPTY_PATH);
if (!both_filename_and_buf_are_null) {
- PRE_MEM_RASCIIZ( "statx(filename)", ARG2 );
+ // Since Linux 6.11, the kernel allows passing a NULL filename when
+ // the AT_EMPTY_PATH flag is set.
+ if (!statx_null_path)
+ PRE_MEM_RASCIIZ( "statx(filename)", ARG2 );
PRE_MEM_WRITE( "statx(buf)", ARG5, sizeof(struct vki_statx) );
}
}
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