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dwarf2out.c: For DWARF 4+, output DW_AT_high_pc as constant offset. 

* dwarf2out.h (enum dw_val_class): Add dw_val_class_high_pc.
        * dwarf2out.c (dw_val_equal_p): Handle dw_val_class_high_pc.
        (add_AT_low_high_pc): New function.
        (AT_lbl): Handle dw_val_class_high_pc.
        (print_die): Likewise.
        (attr_checksum): Likewise.
        (attr_checksum_ordered): Likewise.
        (same_dw_val_p): Likewise.
        (size_of_die): Likewise.
        (value_format): Likewise.
        (output_die): Likewise.
        (gen_subprogram_die): Use add_AT_low_high_pc.
        (add_high_low_attributes): Likewise.
        (dwarf2out_finish): Likewise.

From-SVN: r190543
This commit is contained in:
Mark Wielaard 2012-08-20 20:27:46 +00:00 committed by Mark Wielaard
parent ed0ba472c6
commit 413de8e5c7
3 changed files with 81 additions and 28 deletions
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17
gcc/ChangeLog
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@ -1,3 +1,20 @@
2012-08-20 Mark Wielaard <mjw@redhat.com>
* dwarf2out.h (enum dw_val_class): Add dw_val_class_high_pc.
* dwarf2out.c (dw_val_equal_p): Handle dw_val_class_high_pc.
(add_AT_low_high_pc): New function.
(AT_lbl): Handle dw_val_class_high_pc.
(print_die): Likewise.
(attr_checksum): Likewise.
(attr_checksum_ordered): Likewise.
(same_dw_val_p): Likewise.
(size_of_die): Likewise.
(value_format): Likewise.
(output_die): Likewise.
(gen_subprogram_die): Use add_AT_low_high_pc.
(add_high_low_attributes): Likewise.
(dwarf2out_finish): Likewise.
2012-08-20 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/54294

89
gcc/dwarf2out.c
View File

@ -1312,6 +1312,7 @@ dw_val_equal_p (dw_val_node *a, dw_val_node *b)
case dw_val_class_fde_ref:
return a->v.val_fde_index == b->v.val_fde_index;
case dw_val_class_lbl_id:
case dw_val_class_high_pc:
return strcmp (a->v.val_lbl_id, b->v.val_lbl_id) == 0;
case dw_val_class_str:
return a->v.val_str == b->v.val_str;
@ -3598,6 +3599,26 @@ add_AT_data8 (dw_die_ref die, enum dwarf_attribute attr_kind,
add_dwarf_attr (die, &attr);
}
/* Add DW_AT_low_pc and DW_AT_high_pc to a DIE. */
static inline void
add_AT_low_high_pc (dw_die_ref die, const char *lbl_low, const char *lbl_high)
{
dw_attr_node attr;
attr.dw_attr = DW_AT_low_pc;
attr.dw_attr_val.val_class = dw_val_class_lbl_id;
attr.dw_attr_val.v.val_lbl_id = xstrdup (lbl_low);
add_dwarf_attr (die, &attr);
attr.dw_attr = DW_AT_high_pc;
if (dwarf_version < 4)
attr.dw_attr_val.val_class = dw_val_class_lbl_id;
else
attr.dw_attr_val.val_class = dw_val_class_high_pc;
attr.dw_attr_val.v.val_lbl_id = xstrdup (lbl_high);
add_dwarf_attr (die, &attr);
}
/* Hash and equality functions for debug_str_hash. */
static hashval_t
@ -3981,7 +4002,8 @@ AT_lbl (dw_attr_ref a)
{
gcc_assert (a && (AT_class (a) == dw_val_class_lbl_id
|| AT_class (a) == dw_val_class_lineptr
|| AT_class (a) == dw_val_class_macptr));
|| AT_class (a) == dw_val_class_macptr
|| AT_class (a) == dw_val_class_high_pc));
return a->dw_attr_val.v.val_lbl_id;
}
@ -4877,6 +4899,7 @@ print_die (dw_die_ref die, FILE *outfile)
case dw_val_class_lbl_id:
case dw_val_class_lineptr:
case dw_val_class_macptr:
case dw_val_class_high_pc:
fprintf (outfile, "label: %s", AT_lbl (a));
break;
case dw_val_class_str:
@ -5033,6 +5056,7 @@ attr_checksum (dw_attr_ref at, struct md5_ctx *ctx, int *mark)
case dw_val_class_lbl_id:
case dw_val_class_lineptr:
case dw_val_class_macptr:
case dw_val_class_high_pc:
break;
case dw_val_class_file:
@ -5305,6 +5329,7 @@ attr_checksum_ordered (enum dwarf_tag tag, dw_attr_ref at,
case dw_val_class_lbl_id:
case dw_val_class_lineptr:
case dw_val_class_macptr:
case dw_val_class_high_pc:
break;
case dw_val_class_file:
@ -5770,6 +5795,7 @@ same_dw_val_p (const dw_val_node *v1, const dw_val_node *v2, int *mark)
case dw_val_class_lbl_id:
case dw_val_class_lineptr:
case dw_val_class_macptr:
case dw_val_class_high_pc:
return 1;
case dw_val_class_file:
@ -7241,6 +7267,9 @@ size_of_die (dw_die_ref die)
case dw_val_class_vms_delta:
size += DWARF_OFFSET_SIZE;
break;
case dw_val_class_high_pc:
size += DWARF2_ADDR_SIZE;
break;
default:
gcc_unreachable ();
}
@ -7558,6 +7587,17 @@ value_format (dw_attr_ref a)
case dw_val_class_data8:
return DW_FORM_data8;
case dw_val_class_high_pc:
switch (DWARF2_ADDR_SIZE)
{
case 4:
return DW_FORM_data4;
case 8:
return DW_FORM_data8;
default:
gcc_unreachable ();
}
default:
gcc_unreachable ();
}
@ -7984,6 +8024,11 @@ output_die (dw_die_ref die)
break;
}
case dw_val_class_high_pc:
dw2_asm_output_delta (DWARF2_ADDR_SIZE, AT_lbl (a),
get_AT_low_pc (die), "DW_AT_high_pc");
break;
default:
gcc_unreachable ();
}
@ -17028,19 +17073,18 @@ gen_subprogram_die (tree decl, dw_die_ref context_die)
if (fde->dw_fde_begin)
{
/* We have already generated the labels. */
add_AT_lbl_id (subr_die, DW_AT_low_pc, fde->dw_fde_begin);
add_AT_lbl_id (subr_die, DW_AT_high_pc, fde->dw_fde_end);
add_AT_low_high_pc (subr_die, fde->dw_fde_begin, fde->dw_fde_end);
}
else
{
/* Create start/end labels and add the range. */
char label_id[MAX_ARTIFICIAL_LABEL_BYTES];
ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_BEGIN_LABEL,
char label_id_low[MAX_ARTIFICIAL_LABEL_BYTES];
char label_id_high[MAX_ARTIFICIAL_LABEL_BYTES];
ASM_GENERATE_INTERNAL_LABEL (label_id_low, FUNC_BEGIN_LABEL,
current_function_funcdef_no);
add_AT_lbl_id (subr_die, DW_AT_low_pc, label_id);
ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_END_LABEL,
ASM_GENERATE_INTERNAL_LABEL (label_id_high, FUNC_END_LABEL,
current_function_funcdef_no);
add_AT_lbl_id (subr_die, DW_AT_high_pc, label_id);
add_AT_low_high_pc (subr_die, label_id_low, label_id_high);
}
#if VMS_DEBUGGING_INFO
@ -17104,10 +17148,8 @@ gen_subprogram_die (tree decl, dw_die_ref context_die)
dw_die_ref seg_die;
/* Do the 'primary' section. */
add_AT_lbl_id (subr_die, DW_AT_low_pc,
fde->dw_fde_begin);
add_AT_lbl_id (subr_die, DW_AT_high_pc,
fde->dw_fde_end);
add_AT_low_high_pc (subr_die, fde->dw_fde_begin,
fde->dw_fde_end);
/* Build a minimal DIE for the secondary section. */
seg_die = new_die (DW_TAG_subprogram,
@ -17131,20 +17173,15 @@ gen_subprogram_die (tree decl, dw_die_ref context_die)
add_AT_flag (seg_die, DW_AT_artificial, 1);
name = concat ("__second_sect_of_", name, NULL);
add_AT_lbl_id (seg_die, DW_AT_low_pc,
fde->dw_fde_second_begin);
add_AT_lbl_id (seg_die, DW_AT_high_pc,
fde->dw_fde_second_end);
add_AT_low_high_pc (seg_die, fde->dw_fde_second_begin,
fde->dw_fde_second_end);
add_name_attribute (seg_die, name);
if (want_pubnames ())
add_pubname_string (name, seg_die);
}
}
else
{
add_AT_lbl_id (subr_die, DW_AT_low_pc, fde->dw_fde_begin);
add_AT_lbl_id (subr_die, DW_AT_high_pc, fde->dw_fde_end);
}
add_AT_low_high_pc (subr_die, fde->dw_fde_begin, fde->dw_fde_end);
}
cfa_fb_offset = CFA_FRAME_BASE_OFFSET (decl);
@ -17887,12 +17924,12 @@ add_high_low_attributes (tree stmt, dw_die_ref die)
}
else
{
char label_high[MAX_ARTIFICIAL_LABEL_BYTES];
ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
BLOCK_NUMBER (stmt));
add_AT_lbl_id (die, DW_AT_low_pc, label);
ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL,
ASM_GENERATE_INTERNAL_LABEL (label_high, BLOCK_END_LABEL,
BLOCK_NUMBER (stmt));
add_AT_lbl_id (die, DW_AT_high_pc, label);
add_AT_low_high_pc (die, label, label_high);
}
}
@ -22365,10 +22402,8 @@ dwarf2out_finish (const char *filename)
{
/* Don't add if the CU has no associated code. */
if (text_section_used)
{
add_AT_lbl_id (comp_unit_die (), DW_AT_low_pc, text_section_label);
add_AT_lbl_id (comp_unit_die (), DW_AT_high_pc, text_end_label);
}
add_AT_low_high_pc (comp_unit_die (), text_section_label,
text_end_label);
}
else
{

3
gcc/dwarf2out.h
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@ -154,7 +154,8 @@ enum dw_val_class
dw_val_class_file,
dw_val_class_data8,
dw_val_class_decl_ref,
dw_val_class_vms_delta
dw_val_class_vms_delta,
dw_val_class_high_pc
};
/* Describe a floating point constant value, or a vector constant value. */