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sapi/phpdbg: Update of userfaultfd workflow. #13955

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Merged
merged 1 commit into from
Apr 30, 2024
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sapi/phpdbg: Update of userfaultfd workflow. #13955

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9 changes: 8 additions & 1 deletion sapi/phpdbg/phpdbg_watch.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1472,7 +1472,14 @@ void phpdbg_setup_watchpoints(void) {
PHPDBG_G(watch_tmp) = NULL;

#ifdef HAVE_USERFAULTFD_WRITEFAULT
PHPDBG_G(watch_userfaultfd) = syscall(SYS_userfaultfd, O_CLOEXEC);
int flags = O_CLOEXEC;
#ifdef UFFD_USER_MODE_ONLY
// unpriviliged userfaultfd are disabled by default,
// with this flag it allows ranges from the user space
// being reported.
flags |= UFFD_USER_MODE_ONLY;
#endif
PHPDBG_G(watch_userfaultfd) = syscall(SYS_userfaultfd, flags);
if (PHPDBG_G(watch_userfaultfd) < 0) {
PHPDBG_G(watch_userfaultfd) = 0;
} else {
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