From 868014341a7befe77468a87ef9d9da109cbf3c3c Mon Sep 17 00:00:00 2001 From: Tom de Vries Date: Mon, 20 Feb 2023 12:20:14 +0100 Subject: [PATCH] [gdb/symtab] Trust epilogue unwind info for unknown or non-gcc producer Currently we only trust epilogue unwind info only for gcc >= 4.5.0. This has the effect that we don't trust epilogue unwind info for: - unknown producers (CU without DW_AT_producer attribute) - non-gcc producers (say, clang). Instead, only distrust epilogue unwind info only for gcc < 4.5.0. --- gdb/dwarf2/read.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c index 11a2d3e7c9a..a5bc1d89a2d 100644 --- a/gdb/dwarf2/read.c +++ b/gdb/dwarf2/read.c @@ -6460,7 +6460,13 @@ process_full_comp_unit (dwarf2_cu *cu, enum language pretend_language) if (cu->has_loclist && gcc_4_minor >= 5) cust->set_locations_valid (true); - if (gcc_4_minor >= 5) + int major, minor; + if (cu->producer != nullptr + && producer_is_gcc (cu->producer, &major, &minor) + && (major < 4 || (major == 4 && minor < 5))) + /* Don't trust gcc < 4.5.x. */ + cust->set_epilogue_unwind_valid (false); + else cust->set_epilogue_unwind_valid (true); cust->set_call_site_htab (cu->call_site_htab); -- 2.30.2