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[compiler-rt][rtsan] Linux's eventfd interception. #132836

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Merged
merged 1 commit into from
Apr 5, 2025
Merged

[compiler-rt][rtsan] Linux's eventfd interception. #132836

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9 changes: 9 additions & 0 deletions compiler-rt/lib/rtsan/rtsan_interceptors_posix.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1359,6 +1359,12 @@ INTERCEPTOR(int, timerfd_gettime, int fd, struct itimerspec *val) {
__rtsan_notify_intercepted_call("timerfd_gettime");
return REAL(timerfd_gettime)(fd, val);
}

/* eventfd wrappers calls SYS_eventfd2 down the line */
INTERCEPTOR(int, eventfd, unsigned int count, int flags) {
__rtsan_notify_intercepted_call("eventfd");
return REAL(eventfd)(count, flags);
}
#define RTSAN_MAYBE_INTERCEPT_INOTIFY_INIT INTERCEPT_FUNCTION(inotify_init)
#define RTSAN_MAYBE_INTERCEPT_INOTIFY_INIT1 INTERCEPT_FUNCTION(inotify_init1)
#define RTSAN_MAYBE_INTERCEPT_INOTIFY_ADD_WATCH \
Expand All @@ -1370,6 +1376,7 @@ INTERCEPTOR(int, timerfd_gettime, int fd, struct itimerspec *val) {
INTERCEPT_FUNCTION(timerfd_settime)
#define RTSAN_MAYBE_INTERCEPT_TIMERFD_GETTIME \
INTERCEPT_FUNCTION(timerfd_gettime)
#define RTSAN_MAYBE_INTERCEPT_EVENTFD INTERCEPT_FUNCTION(eventfd)
#else
#define RTSAN_MAYBE_INTERCEPT_INOTIFY_INIT
#define RTSAN_MAYBE_INTERCEPT_INOTIFY_INIT1
Expand All @@ -1378,6 +1385,7 @@ INTERCEPTOR(int, timerfd_gettime, int fd, struct itimerspec *val) {
#define RTSAN_MAYBE_INTERCEPT_TIMERFD_CREATE
#define RTSAN_MAYBE_INTERCEPT_TIMERFD_SETTIME
#define RTSAN_MAYBE_INTERCEPT_TIMERFD_GETTIME
#define RTSAN_MAYBE_INTERCEPT_EVENTFD
#endif

INTERCEPTOR(int, pipe, int pipefd[2]) {
Expand Down Expand Up @@ -1644,6 +1652,7 @@ void __rtsan::InitializeInterceptors() {
RTSAN_MAYBE_INTERCEPT_TIMERFD_CREATE;
RTSAN_MAYBE_INTERCEPT_TIMERFD_SETTIME;
RTSAN_MAYBE_INTERCEPT_TIMERFD_GETTIME;
RTSAN_MAYBE_INTERCEPT_EVENTFD;

INTERCEPT_FUNCTION(pipe);
INTERCEPT_FUNCTION(mkfifo);
Expand Down
7 changes: 7 additions & 0 deletions compiler-rt/lib/rtsan/tests/rtsan_test_interceptors_posix.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,7 @@
#include <pthread.h>
#include <stdio.h>
#if SANITIZER_LINUX
#include <sys/eventfd.h>
#include <sys/inotify.h>
#include <sys/timerfd.h>
#endif
Expand Down Expand Up @@ -1677,6 +1678,12 @@ TEST(TestRtsanInterceptors, TimerfdGettimeDiesWhenRealtime) {
ExpectRealtimeDeath(Func, "timerfd_gettime");
ExpectNonRealtimeSurvival(Func);
}

TEST(TestRtsanInterceptors, EventfdDiesWhenRealtime) {
auto Func = []() { eventfd(EFD_CLOEXEC, 0); };
ExpectRealtimeDeath(Func, "eventfd");
ExpectNonRealtimeSurvival(Func);
}
#endif

TEST(TestRtsanInterceptors, MkfifoDiesWhenRealtime) {
Expand Down