From 1d197b254519d68245d460cad1dd835874f6629b Mon Sep 17 00:00:00 2001 From: Hannes Domani Date: Sun, 11 Feb 2024 17:40:59 +0100 Subject: Fix crash when calling Frame.static_link If you try to call Frame.static_link for a frame without debug info, gdb crashes: ``` Temporary breakpoint 1, 0x000000013f821650 in main () (gdb) py print(gdb.selected_frame().static_link()) This application has requested the Runtime to terminate it in an unusual way. Please contact the application's support team for more information. ``` The problem was a missing check if get_frame_block returns nullptr inside frame_follow_static_link. With this, it works: ``` Temporary breakpoint 1, 0x000000013f941650 in main () (gdb) py print(gdb.selected_frame().static_link()) None ``` Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=31366 Approved-By: Tom Tromey --- gdb/frame.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'gdb/frame.c') diff --git a/gdb/frame.c b/gdb/frame.c index fae89cb..72a34fc 100644 --- a/gdb/frame.c +++ b/gdb/frame.c @@ -3121,6 +3121,9 @@ frame_info_ptr frame_follow_static_link (frame_info_ptr frame) { const block *frame_block = get_frame_block (frame, nullptr); + if (frame_block == nullptr) + return {}; + frame_block = frame_block->function_block (); const struct dynamic_prop *static_link = frame_block->static_link (); -- cgit v1.1