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libbacktrace: gather address ranges from skeleton units

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* dwarf.c (find_address_ranges): Handle skeleton units.
	(read_function_entry): Likewise.
This commit is contained in:
Ian Lance Taylor 2022-02-16 20:18:45 -08:00
parent 687e57d7ac
commit 837eb12629
1 changed files with 20 additions and 11 deletions
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31
libbacktrace/dwarf.c
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@ -1989,14 +1989,16 @@ find_address_ranges (struct backtrace_state *state, uintptr_t base_address,
break;
case DW_AT_stmt_list:
if (abbrev->tag == DW_TAG_compile_unit
if ((abbrev->tag == DW_TAG_compile_unit
|| abbrev->tag == DW_TAG_skeleton_unit)
&& (val.encoding == ATTR_VAL_UINT
|| val.encoding == ATTR_VAL_REF_SECTION))
u->lineoff = val.u.uint;
break;
case DW_AT_name:
if (abbrev->tag == DW_TAG_compile_unit)
if (abbrev->tag == DW_TAG_compile_unit
|| abbrev->tag == DW_TAG_skeleton_unit)
{
name_val = val;
have_name_val = 1;
@ -2004,7 +2006,8 @@ find_address_ranges (struct backtrace_state *state, uintptr_t base_address,
break;
case DW_AT_comp_dir:
if (abbrev->tag == DW_TAG_compile_unit)
if (abbrev->tag == DW_TAG_compile_unit
|| abbrev->tag == DW_TAG_skeleton_unit)
{
comp_dir_val = val;
have_comp_dir_val = 1;
@ -2012,19 +2015,22 @@ find_address_ranges (struct backtrace_state *state, uintptr_t base_address,
break;
case DW_AT_str_offsets_base:
if (abbrev->tag == DW_TAG_compile_unit
if ((abbrev->tag == DW_TAG_compile_unit
|| abbrev->tag == DW_TAG_skeleton_unit)
&& val.encoding == ATTR_VAL_REF_SECTION)
u->str_offsets_base = val.u.uint;
break;
case DW_AT_addr_base:
if (abbrev->tag == DW_TAG_compile_unit
if ((abbrev->tag == DW_TAG_compile_unit
|| abbrev->tag == DW_TAG_skeleton_unit)
&& val.encoding == ATTR_VAL_REF_SECTION)
u->addr_base = val.u.uint;
break;
case DW_AT_rnglists_base:
if (abbrev->tag == DW_TAG_compile_unit
if ((abbrev->tag == DW_TAG_compile_unit
|| abbrev->tag == DW_TAG_skeleton_unit)
&& val.encoding == ATTR_VAL_REF_SECTION)
u->rnglists_base = val.u.uint;
break;
@ -2052,7 +2058,8 @@ find_address_ranges (struct backtrace_state *state, uintptr_t base_address,
}
if (abbrev->tag == DW_TAG_compile_unit
|| abbrev->tag == DW_TAG_subprogram)
|| abbrev->tag == DW_TAG_subprogram
|| abbrev->tag == DW_TAG_skeleton_unit)
{
if (!add_ranges (state, dwarf_sections, base_address,
is_bigendian, u, pcrange.lowpc, &pcrange,
@ -2060,9 +2067,10 @@ find_address_ranges (struct backtrace_state *state, uintptr_t base_address,
(void *) addrs))
return 0;
/* If we found the PC range in the DW_TAG_compile_unit, we
can stop now. */
if (abbrev->tag == DW_TAG_compile_unit
/* If we found the PC range in the DW_TAG_compile_unit or
DW_TAG_skeleton_unit, we can stop now. */
if ((abbrev->tag == DW_TAG_compile_unit
|| abbrev->tag == DW_TAG_skeleton_unit)
&& (pcrange.have_ranges
|| (pcrange.have_lowpc && pcrange.have_highpc)))
return 1;
@ -3274,7 +3282,8 @@ read_function_entry (struct backtrace_state *state, struct dwarf_data *ddata,
/* The compile unit sets the base address for any address
ranges in the function entries. */
if (abbrev->tag == DW_TAG_compile_unit
if ((abbrev->tag == DW_TAG_compile_unit
|| abbrev->tag == DW_TAG_skeleton_unit)
&& abbrev->attrs[i].name == DW_AT_low_pc)
{
if (val.encoding == ATTR_VAL_ADDRESS)