gdb/testsuite/gdb.base/hbreak-in-shr-unsupported.exp

   1 # Copyright 2014-2019 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 that trying to inserting a hw breakpoint in a shared library
  17 # when the target doesn't support hw breakpoints doesn't silently
  18 # error out without informing the user.
  19
  20 if {[skip_shlib_tests]} {
  21     return -1
  22 }
  23
  24 set main_src hbreak-in-shr-unsupported.c
  25 set lib_src hbreak-in-shr-unsupported-shr.c
  26 standard_testfile ${main_src} ${lib_src}
  27 set lib_basename hbreak-in-shr-unsupported-shr.so
  28 set lib_so [standard_output_file ${lib_basename}]
  29
  30 set lib_opts "debug"
  31 set exec_opts [list debug shlib=${lib_so}]
  32
  33 if [get_compiler_info] {
  34     return -1
  35 }
  36
  37 if { [gdb_compile_shlib ${srcdir}/${subdir}/${lib_src} ${lib_so} $lib_opts] != ""
  38      || [gdb_compile ${srcdir}/${subdir}/${main_src} ${binfile} executable $exec_opts] != ""} {
  39     untested "failed to compile"
  40     return -1
  41 }
  42
  43 clean_restart $binfile
  44 gdb_load_shlib $lib_so
  45
  46 if ![runto_main] then {
  47     fail "can't run to main"
  48     return -1
  49 }
  50
  51 set is_target_remote [gdb_is_target_remote]
  52
  53 # Get main breakpoint out of the way.
  54 delete_breakpoints
  55
  56 # Easier to test if GDB inserts breakpoints immediately.
  57 gdb_test_no_output "set breakpoint always-inserted on"
  58
  59 # Force-disable Z1 packets, in case the target actually supports
  60 # these.
  61 if {$is_target_remote} {
  62     gdb_test_no_output "set remote Z-packet off"
  63 }
  64
  65 # Probe for hw breakpoints support.  With Z packets disabled, this
  66 # should always fail with remote targets.  For other targets, with no
  67 # way to force-disable hw breakpoints support, best we can do is skip
  68 # the remainder of the test if hardware breakpoint insertion in a
  69 # function in the main executable succeeds.
  70 set cant_insert_hbreak 0
  71 set supports_hbreak 0
  72 set test "probe hbreak support"
  73 gdb_test_multiple "hbreak main" $test {
  74     -re "No hardware breakpoint support in the target.*$gdb_prompt $" {
  75         pass $test
  76     }
  77     -re "Hardware breakpoints used exceeds limit.*$gdb_prompt $" {
  78         pass $test
  79     }
  80     -re "Cannot insert hardware breakpoint.*$gdb_prompt $" {
  81         set cant_insert_hbreak 1
  82         set supports_hbreak 1
  83         pass $test
  84     }
  85     -re "Hardware assisted breakpoint.*at.* file .*$srcfile, line.*$gdb_prompt $" {
  86         set supports_hbreak 1
  87         if {$is_target_remote} {
  88             # Z-packets have been force-disabled, so this shouldn't
  89             # happen.
  90             fail $test
  91         } else {
  92             pass $test
  93         }
  94     }
  95 }
  96
  97 if {!$supports_hbreak} {
  98     unsupported "no hbreak support"
  99     return
 100 }
 101
 102 if {!$cant_insert_hbreak} {
 103     unsupported "can't disable hw breakpoint support"
 104     return
 105 }
 106
 107 # Get previous hw breakpoint out of the way.
 108 delete_breakpoints
 109
 110 # Without target support, this should always complain.  GDB used to
 111 # suppress the error if the breakpoint was set in a shared library.
 112 # While that makes sense for software breakpoints (the memory might be
 113 # unmapped), it doesn't for hardware breakpoints, as those by
 114 # definition are implemented using a mechanism that is not dependent
 115 # on being able to modify the target's memory.
 116 gdb_test "hbreak shrfunc" "Cannot insert hardware breakpoint.*" \
 117     "hbreak shrfunc complains"
 118
 119 gdb_test "info break" "hw breakpoint.*y.*$hex.*in shrfunc at.*" \
 120     "breakpoint not pending"