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guangmingchen pushed a commit to branch master
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The following commit(s) were added to refs/heads/master by this push:
new 9f4947c4 fix: avoid SIGSEGV in read_proc_io during static
initialization (#3184)
9f4947c4 is described below
commit 9f4947c4d1cfa7af8b3d0f6e3fc0aa6ea4abfb4f
Author: yujiasheng <[email protected]>
AuthorDate: Mon Dec 29 21:45:19 2025 +0800
fix: avoid SIGSEGV in read_proc_io during static initialization (#3184)
Signed-off-by: jiasheng.yu <[email protected]>
Co-authored-by: jiasheng.yu <[email protected]>
---
src/bvar/default_variables.cpp | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/src/bvar/default_variables.cpp b/src/bvar/default_variables.cpp
index 395d05e1..a84c3ab0 100644
--- a/src/bvar/default_variables.cpp
+++ b/src/bvar/default_variables.cpp
@@ -22,6 +22,8 @@
#include <sys/resource.h> // getrusage
#include <dirent.h> // dirent
#include <iomanip> // setw
+#include <stdio.h>
+#include <errno.h>
#if defined(__APPLE__)
#include <libproc.h>
#include <sys/resource.h>
@@ -430,7 +432,12 @@ static bool read_proc_io(ProcIO* s) {
#if defined(OS_LINUX)
butil::ScopedFILE fp("/proc/self/io", "r");
if (NULL == fp) {
- PLOG_ONCE(WARNING) << "Fail to open /proc/self/io";
+ static bool ever_printed_io_err = false;
+ if (!ever_printed_io_err) {
+ fprintf(stderr, "WARNING: Fail to open /proc/self/io, errno=%d. "
+ "I/O related bvars will be unavailable.\n", errno);
+ ever_printed_io_err = true;
+ }
return false;
}
errno = 0;
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