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* dwarf2expr.c (execute_stack_op): Handle DW_OP_GNU_entry_value.  New
	label abort_expression.
	* dwarf2loc.c (dwarf2_evaluate_loc_desc_full): Handle
	DWARF_VALUE_OPTIMIZED_OUT.

gdb/testsuite/
	* gdb.dwarf2/dw2-entry-value-main.c: New file.
	* gdb.dwarf2/dw2-entry-value.S: New file.
	* gdb.dwarf2/dw2-entry-value.exp: New file.
This commit is contained in:
Jan Kratochvil 2011-03-22 21:06:34 +00:00
parent dc80f6ae78
commit dd90784ccd
7 changed files with 200 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

7
gdb/ChangeLog
View file

@ -1,3 +1,10 @@
2011-03-22 Jan Kratochvil <jan.kratochvil@redhat.com>
* dwarf2expr.c (execute_stack_op): Handle DW_OP_GNU_entry_value. New
label abort_expression.
* dwarf2loc.c (dwarf2_evaluate_loc_desc_full): Handle
DWARF_VALUE_OPTIMIZED_OUT.
2011-03-22 Jan Kratochvil <jan.kratochvil@redhat.com>
Code cleanup.

8
gdb/dwarf2expr.c
View file

@ -904,6 +904,13 @@ execute_stack_op (struct dwarf_expr_context *ctx,
op_ptr += 4;
ctx->dwarf_call (ctx, result);
goto no_push;
case DW_OP_GNU_entry_value:
/* This operation is not yet supported by GDB. */
ctx->location = DWARF_VALUE_OPTIMIZED_OUT;
ctx->stack_len = 0;
ctx->num_pieces = 0;
goto abort_expression;
default:
error (_("Unhandled dwarf expression opcode 0x%x"), op);
@ -921,6 +928,7 @@ execute_stack_op (struct dwarf_expr_context *ctx,
if (ctx->location == DWARF_VALUE_IMPLICIT_POINTER)
add_piece (ctx, 8 * ctx->addr_size, 0);
abort_expression:
ctx->recursion_depth--;
gdb_assert (ctx->recursion_depth >= 0);
#undef sign_ext

7
gdb/dwarf2loc.c
View file

@ -1220,12 +1220,17 @@ dwarf2_evaluate_loc_desc_full (struct type *type, struct frame_info *frame,
}
break;
case DWARF_VALUE_OPTIMIZED_OUT:
retval = allocate_value (type);
VALUE_LVAL (retval) = not_lval;
set_value_optimized_out (retval, 1);
break;
/* DWARF_VALUE_IMPLICIT_POINTER was converted to a pieced
operation by execute_stack_op. */
case DWARF_VALUE_IMPLICIT_POINTER:
/* DWARF_VALUE_OPTIMIZED_OUT can't occur in this context --
it can only be encountered when making a piece. */
case DWARF_VALUE_OPTIMIZED_OUT:
default:
internal_error (__FILE__, __LINE__, _("invalid location type"));
}

6
gdb/testsuite/ChangeLog
View file

@ -1,3 +1,9 @@
2011-03-22 Jan Kratochvil <jan.kratochvil@redhat.com>
* gdb.dwarf2/dw2-entry-value-main.c: New file.
* gdb.dwarf2/dw2-entry-value.S: New file.
* gdb.dwarf2/dw2-entry-value.exp: New file.
2011-03-22 Phil Muldoon <pmuldoon@redhat.com>
PR python/12183

37
gdb/testsuite/gdb.dwarf2/dw2-entry-value-main.c Normal file
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@ -0,0 +1,37 @@
/* This testcase is part of GDB, the GNU debugger.
Copyright 2011 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
asm (".globl f_start");
asm ("f_start:");
volatile int v;
void
f (int x)
{
v++;
}
asm (".globl f_end");
asm ("f_end:");
int
main (void)
{
f (1);
return 0;
}

104
gdb/testsuite/gdb.dwarf2/dw2-entry-value.S Normal file
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@ -0,0 +1,104 @@
/* Copyright 2011 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
.section .debug_info
debug_start:
.long debug_end - 1f /* Length of Compilation Unit Info */
1:
.2byte 0x3 /* DWARF version number */
.long .Ldebug_abbrev0 /* Offset Into Abbrev. Section */
.byte 0x4 /* Pointer Size (in bytes) */
.uleb128 0x1 /* (DIE (0xb) DW_TAG_compile_unit) */
.ascii "GNU C 4.4.3\0" /* DW_AT_producer */
.byte 0x1 /* DW_AT_language */
.ascii "1.c\0" /* DW_AT_name */
.uleb128 0x4 /* (DIE (0x3c) DW_TAG_subprogram) */
.ascii "f\0" /* DW_AT_name */
.long f_start /* DW_AT_low_pc */
.long f_end /* DW_AT_high_pc */
.byte 0x1 /* DW_AT_prototyped */
.uleb128 0x5 /* (DIE (0x42) DW_TAG_formal_parameter) */
.ascii "param\0" /* DW_AT_name */
.long type - debug_start /* DW_AT_type */
.long loclist /* DW_AT_location */
.byte 0x0 /* end of children of DIE 0x3c */
type:
.uleb128 3 /* Abbrev: DW_TAG_base_type */
.ascii "int\0" /* DW_AT_name */
.byte 4 /* DW_AT_byte_size */
.byte 5 /* DW_AT_encoding */
.byte 0x0 /* end of children of DIE 0xb */
debug_end:
.section .debug_loc
loclist:
.long f_start, f_end
.2byte 2f-1f
1: .byte 0xf3 /* DW_OP_GNU_entry_value */
.uleb128 2f-3f
3: .byte 0x50 /* DW_OP_reg0 */
2:
.long 0, 0
.section .debug_abbrev
.Ldebug_abbrev0:
.uleb128 0x1 /* (abbrev code) */
.uleb128 0x11 /* (TAG: DW_TAG_compile_unit) */
.byte 0x1 /* DW_children_yes */
.uleb128 0x25 /* (DW_AT_producer) */
.uleb128 0x8 /* (DW_FORM_string) */
.uleb128 0x13 /* (DW_AT_language) */
.uleb128 0xb /* (DW_FORM_data1) */
.uleb128 0x3 /* (DW_AT_name) */
.uleb128 0x8 /* (DW_FORM_string) */
.byte 0x0
.byte 0x0
.uleb128 3 /* Abbrev code */
.uleb128 0x24 /* DW_TAG_base_type */
.byte 0 /* has_children */
.uleb128 0x3 /* DW_AT_name */
.uleb128 0x8 /* DW_FORM_string */
.uleb128 0xb /* DW_AT_byte_size */
.uleb128 0xb /* DW_FORM_data1 */
.uleb128 0x3e /* DW_AT_encoding */
.uleb128 0xb /* DW_FORM_data1 */
.byte 0x0 /* Terminator */
.byte 0x0 /* Terminator */
.uleb128 0x4 /* (abbrev code) */
.uleb128 0x2e /* (TAG: DW_TAG_subprogram) */
.byte 0x1 /* DW_children_yes */
.uleb128 0x3 /* (DW_AT_name) */
.uleb128 0x8 /* (DW_FORM_string) */
.uleb128 0x11 /* (DW_AT_low_pc) */
.uleb128 0x1 /* (DW_FORM_addr) */
.uleb128 0x12 /* (DW_AT_high_pc) */
.uleb128 0x1 /* (DW_FORM_addr) */
.uleb128 0x27 /* (DW_AT_prototyped) */
.uleb128 0xc /* (DW_FORM_flag) */
.byte 0x0
.byte 0x0
.uleb128 0x5 /* (abbrev code) */
.uleb128 0x5 /* (TAG: DW_TAG_formal_parameter) */
.byte 0x0 /* DW_children_no */
.uleb128 0x3 /* DW_AT_name */
.uleb128 0x8 /* DW_FORM_string */
.uleb128 0x49 /* (DW_AT_type) */
.uleb128 0x13 /* (DW_FORM_ref4) */
.uleb128 0x02 /* (DW_AT_location) */
.uleb128 0x06 /* (DW_FORM_data4) */
.byte 0x0
.byte 0x0
.byte 0x0

32
gdb/testsuite/gdb.dwarf2/dw2-entry-value.exp Normal file
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@ -0,0 +1,32 @@
# Copyright 2011 Free Software Foundation, Inc.
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
load_lib dwarf.exp
# This test can only be run on targets which support DWARF-2 and use gas.
if {![dwarf2_support]} {
return 0
}
if { [prepare_for_testing dw2-entry-value.exp "dw2-entry-value" {dw2-entry-value-main.c dw2-entry-value.S} {nodebug}] } {
return -1
}
if ![runto f] {
return -1
}
# FAIL was printing:
# param=Unhandled dwarf expression opcode 0xf3
gdb_test "frame" "param=<optimized out>.*" "<optimized out> is printed"