From fdcb23540a2ed663bfca7e81164692aa0661b6d3 Mon Sep 17 00:00:00 2001 From: Andrew Stubbs Date: Sun, 6 Dec 2020 19:23:55 +0000 Subject: [PATCH] Fix offload dwarf info Add a notional code range to the notional parent function of offload kernel functions. This is enough to prevent GDB discarding them. gcc/ChangeLog: * dwarf2out.c (gen_subprogram_die): Add high/low_pc attributes for parents of offload kernels. --- gcc/dwarf2out.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c index 4d84a9e96073..a4a1b934dc76 100644 --- a/gcc/dwarf2out.c +++ b/gcc/dwarf2out.c @@ -23079,6 +23079,20 @@ gen_subprogram_die (tree decl, dw_die_ref context_die) /* We have already generated the labels. */ add_AT_low_high_pc (subr_die, fde->dw_fde_begin, fde->dw_fde_end, false); + + /* Offload kernel functions are nested within a parent function + that doesn't actually exist within the offload object. GDB + will ignore the function and everything nested within unless + we give it a notional code range (the values aren't + important, as long as they are valid). */ + if (flag_generate_offload + && lookup_attribute ("omp target entrypoint", + DECL_ATTRIBUTES (decl)) + && subr_die->die_parent + && subr_die->die_parent->die_tag == DW_TAG_subprogram + && !get_AT_low_pc (subr_die->die_parent)) + add_AT_low_high_pc (subr_die->die_parent, fde->dw_fde_begin, + fde->dw_fde_end, false); } else { -- 2.39.5