#define INIT_SL_INIT
#endif
+#if SANITIZER_INTERCEPT_GETRANDOM
+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 (n > 0) {
+ COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, n);
+ }
+ return n;
+}
+#define INIT_GETRANDOM COMMON_INTERCEPT_FUNCTION(getrandom)
+#else
+#define INIT_GETRANDOM
+#endif
+
static void InitializeCommonInterceptors() {
#if SI_POSIX
static u64 metadata_mem[sizeof(MetadataHashMap) / sizeof(u64) + 1];
INIT_FDEVNAME;
INIT_GETUSERSHELL;
INIT_SL_INIT;
+ INIT_GETRANDOM;
INIT___PRINTF_CHK;
}
POST_WRITE(oldact, oldact_sz);
}
}
+
+PRE_SYSCALL(getrandom)(void *buf, uptr count, long flags) {
+ if (buf) {
+ PRE_WRITE(buf, count);
+ }
+}
+
+POST_SYSCALL(getrandom)(long res, void *buf, uptr count, long flags) {
+ if (res > 0 && buf) {
+ POST_WRITE(buf, res);
+ }
+}
} // extern "C"
#undef PRE_SYSCALL
#define SANITIZER_INTERCEPT_GETUSERSHELL (SI_POSIX && !SI_POSIX)
#define SANITIZER_INTERCEPT_SL_INIT (SI_FREEBSD || SI_NETBSD)
+#define SANITIZER_INTERCEPT_GETRANDOM SI_LINUX
+
#endif // #ifndef SANITIZER_PLATFORM_INTERCEPTORS_H
--- /dev/null
+// RUN: %clangxx -O2 %s -o %t && %run %t
+// UNSUPPORTED: android
+//
+
+#include <sys/types.h>
+
+#if !defined(__GLIBC_PREREQ)
+#define __GLIBC_PREREQ(a, b) 0
+#endif
+
+#if __GLIBC_PREREQ(2, 25)
+#include <sys/random.h>
+#endif
+
+int main() {
+ char buf[16];
+ ssize_t n = 1;
+#if __GLIBC_PREREQ(2, 25)
+ n = getrandom(buf, sizeof(buf), 0);
+#endif
+ return (int)(n <= 0);
+}