From FEDORA_PATCHES Mon Sep 17 00:00:00 2001 From: Fedora GDB patches Date: Fri, 27 Oct 2017 21:07:50 +0200 Subject: gdb-6.5-bz218379-solib-trampoline-lookup-lock-fix.patch ;; Fix lockup on trampoline vs. its function lookup; unreproducible (BZ 218379). ;;=fedora https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=218379 diff --git a/gdb/symtab.c b/gdb/symtab.c --- a/gdb/symtab.c +++ b/gdb/symtab.c @@ -3177,6 +3177,13 @@ find_pc_sect_line (CORE_ADDR pc, struct obj_section *section, int notcurrent) SYMBOL_LINKAGE_NAME (msymbol)); */ ; /* fall through */ + /* `msymbol' trampoline may be located before its .text symbol + but this text symbol may be the address we were looking for. + Avoid `find_pc_sect_line'<->`find_pc_line' infinite loop. + Red Hat Bug 218379. */ + else if (BMSYMBOL_VALUE_ADDRESS (mfunsym) == pc) + warning ("In stub for %s (0x%s); interlocked, please submit the binary to http://bugzilla.redhat.com", MSYMBOL_LINKAGE_NAME (msymbol.minsym), paddress (target_gdbarch (), pc)); + /* fall through */ else return find_pc_line (BMSYMBOL_VALUE_ADDRESS (mfunsym), 0); }