gdb/testsuite/gdb.arch/thumb2-it.exp

   1 # Copyright 2010-2022 Free Software Foundation, Inc.
   2
   3 # This program is free software; you can redistribute it and/or modify
   4 # it under the terms of the GNU General Public License as published by
   5 # the Free Software Foundation; either version 3 of the License, or
   6 # (at your option) any later version.
   7 #
   8 # This program is distributed in the hope that it will be useful,
   9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 # GNU General Public License for more details.
  12 #
  13 # You should have received a copy of the GNU General Public License
  14 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15
  16 # Test single stepping over Thumb-2 IT blocks.
  17
  18 if {![istarget arm*-*eabi*]} then {
  19     verbose "Skipping Thumb-2 tests."
  20     return
  21 }
  22
  23 standard_testfile .S
  24
  25 if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable debug] != "" } {
  26     untested "failed to compile"
  27     return -1
  28 }
  29
  30 gdb_exit
  31 gdb_start
  32 gdb_reinitialize_dir $srcdir/$subdir
  33 gdb_load ${binfile}
  34
  35 if ![runto_main] then {
  36     return -1
  37 }
  38
  39 # Make sure that the compiler options allow Thumb-2.
  40 gdb_test_multiple "list" "list main" {
  41     -re ".*@ No Thumb-2.*$gdb_prompt $" {
  42         pass "list main"
  43         untested "skipping tests due to lack of Thumb-2"
  44         return -1
  45     }
  46     -re ".*@ Thumb-2 OK.*$gdb_prompt $" {
  47         pass "list main"
  48     }
  49 }
  50
  51 proc test_it_block { func } {
  52     global gdb_prompt
  53     global software_step
  54
  55     if { ! [gdb_breakpoint "*${func}"] } {
  56         unresolved "$func, IT block tests"
  57         return
  58     }
  59
  60     gdb_test "call (int) ${func}()" "Breakpoint.*@ Setup.*" "$func, call"
  61
  62     set expected 0
  63     set reached 0
  64     set steps 0
  65     set ok 1
  66     while { $ok } {
  67         set ok 0
  68         set msg "$func, stepi $steps"
  69         gdb_test_multiple "stepi" "$msg" {
  70             -re ".*@ Setup.*$gdb_prompt $" {
  71                 pass "$msg"
  72                 set ok 1
  73             }
  74             -re ".*@ IT instruction, Expected == (\[0-9\]*)\r\n$gdb_prompt $" {
  75                 set expected $expect_out(1,string)
  76                 pass "$msg"
  77                 set ok 1
  78             }
  79             -re ".*@ Reached.*$gdb_prompt $" {
  80                 incr reached
  81                 pass "$msg"
  82                 set ok 1
  83                 if { [regexp {@ Reached, Set ([^\r\n]*)\r\n} $expect_out(0,string) dummy change] } {
  84                     gdb_test "set $change" "" "$func, set $change"
  85                 }
  86             }
  87             -re ".*@ Not reached.*$gdb_prompt $" {
  88                 # An instruction in an IT block whose predicate is false when
  89                 # we reach it.  If using software single step, we should not
  90                 # stop here.
  91                 if { $software_step } {
  92                     fail "$msg"
  93                 } else {
  94                     pass "$msg"
  95                     set ok 1
  96                 }
  97             }
  98             -re ".*@ Never reached.*$gdb_prompt $" {
  99                 # An instruction that should be branched over.
 100                 fail "$msg"
 101             }
 102             -re ".*@ Done.*$gdb_prompt $" {
 103                 pass "$msg"
 104                 if { $reached == $expected } {
 105                     pass "$func, correct instructions reached"
 106                 } else {
 107                     fail "$func, correct instructions reached"
 108                 }
 109                 if { [regexp {@ Done, Check ([^\r\n]*)\r\n} $expect_out(0,string) dummy check] } {
 110                     gdb_test "print $check" ".* = 1" "$func, $check"
 111                 }
 112             }
 113         }
 114         if { ! $ok } {
 115             break
 116         }
 117         incr steps
 118         continue
 119     }
 120
 121     gdb_test "continue" "" "$func, continue"
 122     return
 123 }
 124
 125 proc test_it_break { ndx } {
 126     global software_step
 127
 128     set line [gdb_get_line_number "@ Break ${ndx}"]
 129
 130     if { ! [gdb_breakpoint "${line}"] } {
 131         unresolved "continue to breakpoint: test ${ndx}"
 132         return
 133     }
 134
 135     if { $software_step } {
 136         gdb_continue_to_breakpoint "test ${ndx}" ".*@ Location ${ndx}.*"
 137     } else {
 138         gdb_continue_to_breakpoint "test ${ndx}" ".*@ Break ${ndx}.*"
 139     }
 140 }
 141
 142 # If we are using software single-stepping in GDB, then GDB will not
 143 # stop at conditional instructions with a false predicate during stepi.
 144 # If we are using a simulator or debug interface with hardware single
 145 # step, then GDB will stop at such instructions.
 146 if { [istarget arm*-linux*] } {
 147     set software_step 1
 148 } else {
 149     set software_step 0
 150 }
 151
 152 for { set i 1 } { $i <= 8 } { incr i } {
 153     test_it_block it_${i}
 154 }
 155
 156 gdb_breakpoint "*it_breakpoints"
 157 gdb_test "call (int) it_breakpoints()" "Breakpoint.*"
 158 for { set i 1 } { $i <= 7 } { incr i } {
 159     test_it_break ${i}
 160 }