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Print errno when mprotect fails

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Trying to figure out the problem on s390x.
This commit is contained in:
Aaron Patterson 2021-10-20 12:42:40 -07:00 committed by Aaron Patterson
parent 030b1892d5
commit b0c3f18ec5
Notes: git 2021-10-21 07:07:03 +09:00 
Merged: https://github.com/ruby/ruby/pull/4996
1 changed files with 2 additions and 2 deletions
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4
gc.c
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@ -4870,7 +4870,7 @@ lock_page_body(rb_objspace_t *objspace, struct heap_page_body *body)
#else #else
if (mprotect(body, HEAP_PAGE_SIZE, PROT_NONE)) { if (mprotect(body, HEAP_PAGE_SIZE, PROT_NONE)) {
#endif #endif
rb_bug("Couldn't protect page %p", (void *)body); rb_bug("Couldn't protect page %p, errno: %s", (void *)body, strerror(errno));
} }
else { else {
gc_report(5, objspace, "Protecting page in move %p\n", (void *)body); gc_report(5, objspace, "Protecting page in move %p\n", (void *)body);
@ -4887,7 +4887,7 @@ unlock_page_body(rb_objspace_t *objspace, struct heap_page_body *body)
#else #else
if (mprotect(body, HEAP_PAGE_SIZE, PROT_READ | PROT_WRITE)) { if (mprotect(body, HEAP_PAGE_SIZE, PROT_READ | PROT_WRITE)) {
#endif #endif
rb_bug("Couldn't unprotect page %p", (void *)body); rb_bug("Couldn't unprotect page %p, errno: %s", (void *)body, strerror(errno));
} }
else { else {
gc_report(5, objspace, "Unprotecting page in move %p\n", (void *)body); gc_report(5, objspace, "Unprotecting page in move %p\n", (void *)body);