mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-27 04:52:05 +08:00
4a94e36819
This commit brings all the changes made by running gdb/copyright.py as per GDB's Start of New Year Procedure. For the avoidance of doubt, all changes in this commits were performed by the script.
100 lines
2.3 KiB
C
100 lines
2.3 KiB
C
/* Copyright 2020-2022 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/>. */
|
|
|
|
/* This tests GDB's handling of the DWARF is-stmt field in the line table.
|
|
|
|
This field is used when many addresses all represent the same source
|
|
line. The address(es) at which it is suitable to place a breakpoint for
|
|
a line are marked with is-stmt true, while address(es) that are not good
|
|
places to place a breakpoint are marked as is-stmt false.
|
|
|
|
In order to build a reproducible test and exercise GDB's is-stmt
|
|
support, we will be generating our own DWARF. The test will contain a
|
|
series of C source lines, ensuring that we get a series of assembler
|
|
instructions. Each C source line will be given an assembler label,
|
|
which we use to generate a fake line table.
|
|
|
|
In this fake line table each assembler block is claimed to represent a
|
|
single C source line, however, we will toggle the is-stmt flag. We can
|
|
then debug this with GDB and test the handling of is-stmt. */
|
|
|
|
/* Used to insert labels with which we can build a fake line table. */
|
|
#define LL(N) \
|
|
do \
|
|
{ \
|
|
asm ("line_label_" #N ": .globl line_label_" #N); \
|
|
var = (N); \
|
|
bar = ((N) + 1); \
|
|
} \
|
|
while (0)
|
|
|
|
volatile int var;
|
|
volatile int bar;
|
|
|
|
int
|
|
main ()
|
|
{ /* main prologue */
|
|
asm ("main_label: .globl main_label");
|
|
|
|
/* main start */
|
|
|
|
/* Line 1. */
|
|
/* Line 2. */
|
|
/* Line 3. */
|
|
/* Line 4. */
|
|
/* Line 5. */
|
|
|
|
LL (0);
|
|
LL (1);
|
|
LL (2);
|
|
LL (3);
|
|
LL (4);
|
|
LL (5);
|
|
LL (6);
|
|
LL (7);
|
|
LL (8);
|
|
LL (9);
|
|
LL (10);
|
|
LL (11);
|
|
LL (12);
|
|
LL (13);
|
|
LL (14);
|
|
LL (15);
|
|
LL (16);
|
|
return 0; /* main end */
|
|
}
|
|
|
|
#if 0
|
|
|
|
PROLOGUE*
|
|
1: L1
|
|
2: L1*
|
|
3: L2
|
|
4: L1
|
|
L3
|
|
L4
|
|
L4*
|
|
L2*
|
|
L2
|
|
L3
|
|
L5
|
|
L5*
|
|
L3
|
|
L4
|
|
L5
|
|
RETURN
|
|
|
|
#endif
|