http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60142
Jan Kratochvil <jan.kratochvil at redhat dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jan.kratochvil at redhat dot com --- Comment #4 from Jan Kratochvil <jan.kratochvil at redhat dot com> --- Verified GDB fails with it. GDB puts breakpoint on second ".loc" (that is not the fist/initial ".loc") in a function as currently neither GCC nor GCC use DW_LNS_set_prologue_end. g++ (GCC) 4.9.0 20140212 (experimental) -S -g -fsanitize=address .type _Z4testv, @function _Z4testv: .LASANPC512: .LFB512: .file 2 "asantest.C" .loc 2 4 0 .cfi_startproc .cfi_personality 0x3,__gxx_personality_v0 .cfi_lsda 0x3,.LLSDA512 pushq %rbp .cfi_def_cfa_offset 16 .cfi_offset 6, -16 movq %rsp, %rbp .cfi_def_cfa_register 6 pushq %r14 pushq %r13 pushq %r12 pushq %rbx subq $112, %rsp .cfi_offset 14, -24 .cfi_offset 13, -32 .cfi_offset 12, -40 .cfi_offset 3, -48 leaq -128(%rbp), %rbx movq %rbx, %r14 cmpl $0, __asan_option_detect_stack_use_after_return(%rip) je .L3 .loc 2 4 0 <--- here GDB puts the breakpoint movq %rbx, %rsi movl $96, %edi call __asan_stack_malloc_1 movq %rax, %rbx .L3: GDB already workarounds a similar case of GCC PR debug/48827, this asan prologue may look standard enough it could be possibly also workarounded in GDB.