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provide pubnames when there are multiple code sections

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* dwarf2out.c (gen_subprogram_die):  Add pubnames with code ranges for
	DWARF >= 3.  Add pubnames for the primary section and a reduced DIE for
	the secondary code fragment when outputting for DWARF == 2.

From-SVN: r168570
This commit is contained in:
Iain Sandoe 2011-01-07 13:52:29 +00:00
parent d6bcbb40dd
commit 0b764288f9
2 changed files with 135 additions and 23 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2011-01-07 Iain Sandoe <iains@gcc.gnu.org>
* dwarf2out.c (gen_subprogram_die): Add pubnames with code ranges for
DWARF >= 3. Add pubnames for the primary section and a reduced DIE for
the secondary code fragment when outputting for DWARF == 2.
2011-01-07 Anatoly Sokolov <aesok@post.ru>
* config/xtensa/xtensa.h (OUTPUT_ADDR_CONST_EXTRA): Remove.

152
gcc/dwarf2out.c
View File

@ -18902,7 +18902,6 @@ premark_types_used_by_global_vars (void)
static void
gen_subprogram_die (tree decl, dw_die_ref context_die)
{
char label_id[MAX_ARTIFICIAL_LABEL_BYTES];
tree origin = decl_ultimate_origin (decl);
dw_die_ref subr_die;
tree outer_scope;
@ -19071,12 +19070,24 @@ gen_subprogram_die (tree decl, dw_die_ref context_die)
if (!flag_reorder_blocks_and_partition)
{
ASM_GENERATE_INTERNAL_LABEL (label_id, 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,
current_function_funcdef_no);
add_AT_lbl_id (subr_die, DW_AT_high_pc, label_id);
dw_fde_ref fde = &fde_table[current_funcdef_fde];
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);
}
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,
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,
current_function_funcdef_no);
add_AT_lbl_id (subr_die, DW_AT_high_pc, label_id);
}
#if VMS_DEBUGGING_INFO
/* HP OpenVMS Industry Standard 64: DWARF Extensions
@ -19092,8 +19103,6 @@ gen_subprogram_die (tree decl, dw_die_ref context_die)
attributes allow a compiler to communicate the location(s) to use. */
{
dw_fde_ref fde = &fde_table[current_funcdef_fde];
if (fde->dw_fde_vms_end_prologue)
add_AT_vms_delta (subr_die, DW_AT_HP_prologue,
fde->dw_fde_begin, fde->dw_fde_vms_end_prologue);
@ -19108,19 +19117,116 @@ gen_subprogram_die (tree decl, dw_die_ref context_die)
add_arange (decl, subr_die);
}
else
{ /* Do nothing for now; maybe need to duplicate die, one for
hot section and one for cold section, then use the hot/cold
section begin/end labels to generate the aranges... */
/*
add_AT_lbl_id (subr_die, DW_AT_low_pc, hot_section_label);
add_AT_lbl_id (subr_die, DW_AT_high_pc, hot_section_end_label);
add_AT_lbl_id (subr_die, DW_AT_lo_user, unlikely_section_label);
add_AT_lbl_id (subr_die, DW_AT_hi_user, cold_section_end_label);
{ /* Generate pubnames entries for the split function code
ranges. */
dw_fde_ref fde = &fde_table[current_funcdef_fde];
add_pubname (decl, subr_die);
add_arange (decl, subr_die);
add_arange (decl, subr_die);
*/
if (fde->dw_fde_switched_sections)
{
if (dwarf_version >= 3 || !dwarf_strict)
{
/* We should use ranges for non-contiguous code section
addresses. Use the actual code range for the initial
section, since the HOT/COLD labels might precede an
alignment offset. */
bool range_list_added = false;
if (fde->in_std_section)
{
add_ranges_by_labels (subr_die,
fde->dw_fde_begin,
fde->dw_fde_end,
&range_list_added);
add_ranges_by_labels (subr_die,
fde->dw_fde_unlikely_section_label,
fde->dw_fde_unlikely_section_end_label,
&range_list_added);
}
else
{
add_ranges_by_labels (subr_die,
fde->dw_fde_begin,
fde->dw_fde_end,
&range_list_added);
add_ranges_by_labels (subr_die,
fde->dw_fde_hot_section_label,
fde->dw_fde_hot_section_end_label,
&range_list_added);
}
add_pubname (decl, subr_die);
if (range_list_added)
add_ranges (NULL);
}
else
{
/* There is no real support in DW2 for this .. so we make
a work-around. First, emit the pub name for the segment
containing the function label. Then make and emit a
simplified subprogram DIE for the second segment with the
name pre-fixed by __hot/cold_sect_of_. We use the same
linkage name for the second die so that gdb will find both
sections when given "b foo". */
const char *name = NULL;
tree decl_name = DECL_NAME (decl);
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 it. */
add_pubname (decl, subr_die);
add_arange (decl, subr_die);
/* Build a minimal DIE for the secondary section. */
seg_die = new_die (DW_TAG_subprogram,
subr_die->die_parent, decl);
if (TREE_PUBLIC (decl))
add_AT_flag (seg_die, DW_AT_external, 1);
if (decl_name != NULL
&& IDENTIFIER_POINTER (decl_name) != NULL)
{
name = dwarf2_name (decl, 1);
if (! DECL_ARTIFICIAL (decl))
add_src_coords_attributes (seg_die, decl);
add_linkage_name (seg_die, decl);
}
gcc_assert (name!=NULL);
add_pure_or_virtual_attribute (seg_die, decl);
if (DECL_ARTIFICIAL (decl))
add_AT_flag (seg_die, DW_AT_artificial, 1);
if (fde->in_std_section)
{
name = concat ("__cold_sect_of_", name, NULL);
add_AT_lbl_id (seg_die, DW_AT_low_pc,
fde->dw_fde_unlikely_section_label);
add_AT_lbl_id (seg_die, DW_AT_high_pc,
fde->dw_fde_unlikely_section_end_label);
}
else
{
name = concat ("__hot_sect_of_", name, NULL);
add_AT_lbl_id (seg_die, DW_AT_low_pc,
fde->dw_fde_hot_section_label);
add_AT_lbl_id (seg_die, DW_AT_high_pc,
fde->dw_fde_hot_section_end_label);
}
add_name_attribute (seg_die, name);
add_pubname_string (name, seg_die);
add_arange (decl, 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_pubname (decl, subr_die);
add_arange (decl, subr_die);
}
}
#ifdef MIPS_DEBUGGING_INFO
@ -23164,8 +23270,8 @@ dwarf2out_finish (const char *filename)
/* We can only use the low/high_pc attributes if all of the code was
in .text. */
if (!have_multiple_function_sections
|| !(dwarf_version >= 3 || !dwarf_strict))
if (!have_multiple_function_sections
|| (dwarf_version < 3 && dwarf_strict))
{
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);