gdb/testsuite/gdb.base/solib-display.exp

   1 # Copyright 2009-2016 Free Software Foundation, Inc.
   2 # This program is free software; you can redistribute it and/or modify
   3 # it under the terms of the GNU General Public License as published by
   4 # the Free Software Foundation; either version 3 of the License, or
   5 # (at your option) any later version.
   6 #
   7 # This program is distributed in the hope that it will be useful,
   8 # but WITHOUT ANY WARRANTY; without even the implied warranty of
   9 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10 # GNU General Public License for more details.
  11 #
  12 # You should have received a copy of the GNU General Public License
  13 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  14 #
  15 # Contributed by Paul Pluzhnikov <ppluzhnikov@google.com>
  16 #
  17
  18 # This test case verifies that if a display is active on a variable
  19 # which belongs in a shared library, and that shared library is
  20 # reloaded (e.g. due to re-execution of the program), GDB will continue
  21 # to display it (gdb-6.8 crashed under this scenario).
  22
  23 # Also test that a display of variable which is currently present in
  24 # a shared library, but disappears before re-run, doesn't cause GDB
  25 # difficulties, and that it continues to display other variables.
  26
  27 # Finally, test that displays which refer to main executable
  28 # (and thus aren't affected by shared library unloading) are not
  29 # disabled prematurely.
  30
  31 if { [skip_shlib_tests] || [is_remote target] } {
  32     return 0
  33 }
  34
  35 # Library file.
  36 set libname "solib-display-lib"
  37 set srcfile_lib ${srcdir}/${subdir}/${libname}.c
  38 set binfile_lib [standard_output_file ${libname}.so]
  39 set lib_flags {}
  40 # Binary file.
  41 set testfile "solib-display-main"
  42 set srcfile ${srcdir}/${subdir}/${testfile}.c
  43 set executable ${testfile}
  44 set binfile [standard_output_file ${executable}]
  45 set bin_flags [list debug shlib=${binfile_lib}]
  46
  47 if [get_compiler_info] {
  48     return -1
  49 }
  50
  51 # SEP must be last for the possible `unsupported' error path.
  52 foreach libsepdebug {NO IN SEP} { with_test_prefix "$libsepdebug" {
  53
  54     set sep_lib_flags $lib_flags
  55     if {$libsepdebug != "NO"} {
  56         lappend sep_lib_flags {debug}
  57     }
  58     if { [gdb_compile_shlib ${srcfile_lib} ${binfile_lib} $sep_lib_flags] != ""
  59          || [gdb_compile ${srcfile} ${binfile} executable $bin_flags] != "" } {
  60       untested "Could not compile $binfile_lib or $binfile."
  61       return -1
  62     }
  63
  64     if {$libsepdebug == "SEP"} {
  65         if {[gdb_gnu_strip_debug $binfile_lib] != 0} {
  66             unsupported "Could not split debug of $binfile_lib."
  67             return
  68         } else {
  69             pass "split solib"
  70         }
  71     }
  72
  73     clean_restart $executable
  74
  75     if ![runto_main] then {
  76       fail "Can't run to main"
  77       return 0
  78     }
  79
  80     gdb_test "display a_global" "1: a_global = 41"
  81     gdb_test "display b_global" "2: b_global = 42"
  82     gdb_test "display c_global" "3: c_global = 43"
  83
  84     if { [gdb_start_cmd] < 0 } {
  85         fail "Can't run to main (2)"
  86         continue
  87     }
  88
  89     gdb_test "" [multi_line \
  90                      "1: a_global = 41" \
  91                      "2: b_global = 42"  \
  92                      "3: c_global = 43" \
  93                     ] "after rerun"
  94
  95     # Now rebuild the library without b_global
  96     if { [gdb_compile_shlib ${srcfile_lib} ${binfile_lib} \
  97               "$sep_lib_flags additional_flags=-DNO_B_GLOBAL"] != ""} {
  98         fail "Can't rebuild $binfile_lib"
  99     }
 100
 101     if {$libsepdebug == "SEP"} {
 102         set test "split solib second time"
 103         if {[gdb_gnu_strip_debug $binfile_lib] != 0} {
 104             fail $test
 105             continue
 106         } else {
 107             pass $test
 108         }
 109     }
 110
 111     if { [gdb_start_cmd] < 0 } {
 112         fail "Can't run to main (3)"
 113         continue
 114     }
 115
 116
 117     gdb_test "" [multi_line \
 118                      "1: a_global = 41" \
 119                      "warning: .*b_global.*"  \
 120                      "3: c_global = 43" \
 121                     ] "after rerun (2)"
 122
 123     # Now verify that displays which are not in the shared library
 124     # are not cleared permaturely.
 125
 126     gdb_test "break [gdb_get_line_number "break here" ${testfile}.c]" \
 127             ".*Breakpoint.* at .*"
 128
 129     gdb_test "continue"
 130     gdb_test "display main_global" "4: main_global = 44"
 131     gdb_test "display a_local" "5: a_local = 45"
 132     gdb_test "display a_static" "6: a_static = 46"
 133
 134     if { [gdb_start_cmd] < 0 } {
 135         fail "Can't run to main (4)"
 136         continue
 137     }
 138
 139     gdb_test "" "6: a_static = 46\\r\\n4: main_global = 44\\r\\n.*"
 140     gdb_test "break [gdb_get_line_number "break here" ${testfile}.c]" \
 141             ".*Breakpoint.* at .*"
 142     gdb_test "continue" [multi_line \
 143                              "4: main_global = 44" \
 144                              "5: a_local = 45" \
 145                              "6: a_static = 46" \
 146                             ]
 147 }}