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

   1 # Copyright 2010-2017 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 ${binfile}
  34
  35 if ![runto_main] then {
  36     untested "could not run to main"
  37     return -1
  38 }
  39
  40 # Make sure that the compiler options allow Thumb-2.
  41 gdb_test_multiple "list" "list main" {
  42     -re ".*@ No Thumb-2.*$gdb_prompt $" {
  43         pass "list main"
  44         untested "skipping tests due to lack of Thumb-2"
  45         return -1
  46     }
  47     -re ".*@ Thumb-2 OK.*$gdb_prompt $" {
  48         pass "list main"
  49     }
  50 }
  51
  52 proc test_it_block { func } {
  53     global gdb_prompt
  54     global software_step
  55
  56     if { ! [gdb_breakpoint "*${func}"] } {
  57         unresolved "$func, IT block tests"
  58         return
  59     }
  60
  61     gdb_test "call ${func}()" "Breakpoint.*@ Setup.*" "$func, call"
  62
  63     set expected 0
  64     set reached 0
  65     set steps 0
  66     set ok 1
  67     while { $ok } {
  68         set ok 0
  69         set msg "$func, stepi $steps"
  70         gdb_test_multiple "stepi" "$msg" {
  71             -re ".*@ Setup.*$gdb_prompt $" {
  72                 pass "$msg"
  73                 set ok 1
  74             }
  75             -re ".*@ IT instruction, Expected == (\[0-9\]*)\r\n$gdb_prompt $" {
  76                 set expected $expect_out(1,string)
  77                 pass "$msg"
  78                 set ok 1
  79             }
  80             -re ".*@ Reached.*$gdb_prompt $" {
  81                 incr reached
  82                 pass "$msg"
  83                 set ok 1
  84                 if { [regexp {@ Reached, Set ([^\r\n]*)\r\n} $expect_out(0,string) dummy change] } {
  85                     gdb_test "set $change" "" "$func, set $change"
  86                 }
  87             }
  88             -re ".*@ Not reached.*$gdb_prompt $" {
  89                 # An instruction in an IT block whose predicate is false when
  90                 # we reach it.  If using software single step, we should not
  91                 # stop here.
  92                 if { $software_step } {
  93                     fail "$msg"
  94                 } else {
  95                     pass "$msg"
  96                     set ok 1
  97                 }
  98             }
  99             -re ".*@ Never reached.*$gdb_prompt $" {
 100                 # An instruction that should be branched over.
 101                 fail "$msg"
 102             }
 103             -re ".*@ Done.*$gdb_prompt $" {
 104                 pass "$msg"
 105                 if { $reached == $expected } {
 106                     pass "$func, correct instructions reached"
 107                 } else {
 108                     fail "$func, correct instructions reached"
 109                 }
 110                 if { [regexp {@ Done, Check ([^\r\n]*)\r\n} $expect_out(0,string) dummy check] } {
 111                     gdb_test "print $check" ".* = 1" "$func, $check"
 112                 }
 113             }
 114         }
 115         if { ! $ok } {
 116             break
 117         }
 118         incr steps
 119         continue
 120     }
 121
 122     gdb_test "continue" "" "$func, continue"
 123     return
 124 }
 125
 126 proc test_it_break { ndx } {
 127     global software_step
 128
 129     set line [gdb_get_line_number "@ Break ${ndx}"]
 130
 131     if { ! [gdb_breakpoint "${line}"] } {
 132         unresolved "continue to breakpoint: test ${ndx}"
 133         return
 134     }
 135
 136     if { $software_step } {
 137         gdb_continue_to_breakpoint "test ${ndx}" ".*@ Location ${ndx}.*"
 138     } else {
 139         gdb_continue_to_breakpoint "test ${ndx}" ".*@ Break ${ndx}.*"
 140     }
 141 }
 142
 143 # If we are using software single-stepping in GDB, then GDB will not
 144 # stop at conditional instructions with a false predicate during stepi.
 145 # If we are using a simulator or debug interface with hardware single
 146 # step, then GDB will stop at such instructions.
 147 if { [istarget arm*-linux*] } {
 148     set software_step 1
 149 } else {
 150     set software_step 0
 151 }
 152
 153 for { set i 1 } { $i <= 8 } { incr i } {
 154     test_it_block it_${i}
 155 }
 156
 157 gdb_breakpoint "*it_breakpoints"
 158 gdb_test "call it_breakpoints()" "Breakpoint.*"
 159 for { set i 1 } { $i <= 7 } { incr i } {
 160     test_it_break ${i}
 161 }