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803d0592ab
The file gdb.reverse/step-reverse.c is used in test-cases:
- gdb.reverse/step-reverse.exp
- gdb.reverse/next-reverse-bkpt-over-sr.exp
- gdb.reverse/step-precsave.exp
With gcc-7, there are only PASSes (apart from one KFAIL), but with gcc-10, we
have the following FAILs:
...
FAIL: gdb.reverse/step-reverse.exp: reverse stepi from a function call \
(start statement)
FAIL: gdb.reverse/step-reverse.exp: simple reverse stepi
FAIL: gdb.reverse/step-reverse.exp: reverse step out of called fn
FAIL: gdb.reverse/step-reverse.exp: reverse next over call
FAIL: gdb.reverse/step-reverse.exp: reverse step test 1
FAIL: gdb.reverse/step-reverse.exp: reverse next test 1
FAIL: gdb.reverse/step-reverse.exp: reverse step test 2
FAIL: gdb.reverse/step-reverse.exp: reverse next test 2
FAIL: gdb.reverse/step-precsave.exp: reverse stepi from a function call \
(start statement)
FAIL: gdb.reverse/step-precsave.exp: simple reverse stepi
FAIL: gdb.reverse/step-precsave.exp: reverse step out of called fn
FAIL: gdb.reverse/step-precsave.exp: reverse next over call
FAIL: gdb.reverse/step-precsave.exp: reverse step test 1
FAIL: gdb.reverse/step-precsave.exp: reverse next test 1
FAIL: gdb.reverse/step-precsave.exp: reverse step test 2
FAIL: gdb.reverse/step-precsave.exp: reverse next test 2
...
Looking at the first step-precsave.exp FAIL, we have:
...
(gdb) stepi^M
26 myglob++; return 0; /* ARRIVED IN CALLEE */^M
(gdb) PASS: gdb.reverse/step-precsave.exp: reverse stepi thru function return
stepi^M
0x000000000040055f 26 myglob++; return 0; /* ARRIVED IN CALLEE */^M
(gdb) FAIL: gdb.reverse/step-precsave.exp: reverse stepi from a function call \
(start statement)
...
There's a difference in line info for callee:
...
25 int callee() { /* ENTER CALLEE */
26 myglob++; return 0; /* ARRIVED IN CALLEE */
27 } /* RETURN FROM CALLEE */
...
between gcc-7:
...
Line number Starting address View Stmt
25 0x400557 x
26 0x40055b x
27 0x40056f x
...
and gcc-10:
...
25 0x400552 x
26 0x400556 x
26 0x400565 x
27 0x40056a x
...
The two "recommend breakpoint location" entries at line 26 are for the two
statements ("myglob++" and "return 0"), but the test-case expects to hit line
26 only once.
Fix this by rewriting the two statements into a single statement:
...
- myglob++; return 0; /* ARRIVED IN CALLEE */
+ return myglob++; /* ARRIVED IN CALLEE */
...
Tested on x86_64-linux.
gdb/testsuite/ChangeLog:
2020-07-21 Tom de Vries <tdevries@suse.de>
* gdb.reverse/step-reverse.c (callee): Merge statements.
79 lines
2.0 KiB
C
79 lines
2.0 KiB
C
/* This testcase is part of GDB, the GNU debugger.
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Copyright 2008-2020 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include <stdlib.h>
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#include <string.h>
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/* Test various kinds of stepping.
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*/
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int myglob = 0;
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int callee() { /* ENTER CALLEE */
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return myglob++; /* ARRIVED IN CALLEE */
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} /* RETURN FROM CALLEE */
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/* A structure which, we hope, will need to be passed using memcpy. */
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struct rhomboidal {
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int rather_large[100];
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};
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void
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large_struct_by_value (struct rhomboidal r)
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{
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myglob += r.rather_large[42]; /* step-test.exp: arrive here 1 */
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}
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int main () {
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int w,x,y,z;
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int a[10], b[10];
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/* Test "next" and "step" */
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w = 0; /* BREAK AT MAIN */
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x = 1; /* NEXT TEST 1 */
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y = 2; /* STEP TEST 1 */
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z = 3; /* REVERSE NEXT TEST 1 */
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w = w + 2; /* NEXT TEST 2 */
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x = x + 3; /* REVERSE STEP TEST 1 */
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y = y + 4;
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z = z + 5; /* STEP TEST 2 */
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/* Test that "next" goes over a call */
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callee(); /* NEXT OVER THIS CALL */
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/* Test that "step" doesn't */
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callee(); /* STEP INTO THIS CALL */
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/* Test "stepi" */
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a[5] = a[3] - a[4]; /* FINISH TEST */
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callee(); /* STEPI TEST */
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/* Test "nexti" */
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callee(); /* NEXTI TEST */
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y = w + z;
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{
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struct rhomboidal r;
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memset (r.rather_large, 0, sizeof (r.rather_large));
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r.rather_large[42] = 10;
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large_struct_by_value (r); /* step-test.exp: large struct by value */
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}
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exit (0); /* end of main */
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}
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