gdb/testsuite/gdb.dwarf2/pieces.c

   1 /* Copyright (C) 2010-2019 Free Software Foundation, Inc.
   2
   3    This file is part of GDB.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18 /* The original program corresponding to pieces.S.
  19    This came from https://bugzilla.redhat.com/show_bug.cgi?id=589467
  20    Note that it is not ever compiled, pieces.S is used instead.
  21    However, it is used to extract breakpoint line numbers.  */
  22
  23 struct A { int i; int j; };
  24 struct B { int i : 12; int j : 12; int : 4; };
  25 struct C { int i; int j; int q; };
  26
  27 __attribute__((noinline)) void
  28 bar (int x)
  29 {
  30   asm volatile ("" : : "r" (x) : "memory");
  31 }
  32
  33 __attribute__((noinline)) int
  34 f1 (int k)
  35 {
  36   struct A a = { 4, k + 6 };
  37   asm ("" : "+r" (a.i));
  38   a.j++;
  39   bar (a.i);            /* { dg-final { gdb-test 20 "a.i" "4" } } */
  40   bar (a.j);            /* { dg-final { gdb-test 20 "a.j" "14" } } */
  41   return a.i + a.j;     /* f1 breakpoint */
  42 }
  43
  44 __attribute__((noinline)) int
  45 f2 (int k)
  46 {
  47   int a[2] = { 4, k + 6 };
  48   asm ("" : "+r" (a[0]));
  49   a[1]++;
  50   bar (a[0]);           /* { dg-final { gdb-test 31 "a\[0\]" "4" } } */
  51   bar (a[1]);           /* { dg-final { gdb-test 31 "a\[1\]" "14" } } */
  52   return a[0] + a[1];   /* f2 breakpoint */
  53 }
  54
  55 __attribute__((noinline)) int
  56 f3 (int k)
  57 {
  58   struct B a = { 4, k + 6 };
  59   asm ("" : "+r" (a.i));
  60   a.j++;
  61   bar (a.i);            /* { dg-final { gdb-test 42 "a.i" "4" } } */
  62   bar (a.j);            /* { dg-final { gdb-test 42 "a.j" "14" } } */
  63   return a.i + a.j;     /* f3 breakpoint */
  64 }
  65
  66 __attribute__((noinline)) int
  67 f4 (int k)
  68 {
  69   int a[2] = { k, k };
  70   asm ("" : "+r" (a[0]));
  71   a[1]++;
  72   bar (a[0]);
  73   bar (a[1]);
  74   return a[0] + a[1];           /* f4 breakpoint */
  75 }
  76
  77 __attribute__((noinline)) int
  78 f5 (int k)
  79 {
  80   struct A a = { k, k };
  81   asm ("" : "+r" (a.i));
  82   a.j++;
  83   bar (a.i);
  84   bar (a.j);
  85   return a.i + a.j;             /* f5 breakpoint */
  86 }
  87
  88 __attribute__((noinline)) int
  89 f6 (int k)
  90 {
  91   int z = 23;
  92   struct C a = { k, k, z };
  93   asm ("" : "+r" (a.i));
  94   a.j++;
  95   bar (a.i);
  96   bar (a.j);
  97   return a.i + a.j;             /* f6 breakpoint */
  98 }
  99
 100 int
 101 main (void)
 102 {
 103   int k;
 104   asm ("" : "=r" (k) : "0" (7));
 105   f1 (k);
 106   f2 (k);
 107   f3 (k);
 108   f4 (k);
 109   f5 (k);
 110   f6 (k);
 111   return 0;
 112 }