1# Copyright 2009-2020 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 31if { [skip_shlib_tests] } { 32 return 0 33} 34 35# This test is currently not supported for stub targets, because it uses the 36# start command (through gdb_start_cmd). In theory, it could be changed to 37# use something else (kill + gdb_run_cmd with a manual breakpoint at main). 38# However, when we try that with the native-gdbserver board, we see that the 39# test fails and gdb outputs this upon connection: 40# 41# warning: Unable to display "a_global": No symbol "a_global" in current context. 42# warning: Unable to display "b_global": No symbol "b_global" in current context. 43# warning: Unable to display "c_global": No symbol "c_global" in current context. 44# 45# This is because the initial stop is done before the shared libraries are 46# loaded. 47 48if { [use_gdb_stub] } { 49 return 0 50} 51 52# Library file. 53set libname "solib-display-lib" 54set srcfile_lib ${srcdir}/${subdir}/${libname}.c 55set binfile_lib [standard_output_file ${libname}.so] 56set lib_flags {} 57# Binary file. 58set testfile "solib-display-main" 59set srcfile ${srcdir}/${subdir}/${testfile}.c 60set executable ${testfile} 61set binfile [standard_output_file ${executable}] 62set bin_flags [list debug shlib=${binfile_lib}] 63 64if [get_compiler_info] { 65 return -1 66} 67 68# SEP must be last for the possible `unsupported' error path. 69foreach libsepdebug {NO IN SEP} { with_test_prefix "$libsepdebug" { 70 71 set sep_lib_flags $lib_flags 72 if {$libsepdebug != "NO"} { 73 lappend sep_lib_flags {debug} 74 } 75 if { [gdb_compile_shlib ${srcfile_lib} ${binfile_lib} $sep_lib_flags] != "" 76 || [gdb_compile ${srcfile} ${binfile} executable $bin_flags] != "" } { 77 untested "failed to compile" 78 return -1 79 } 80 81 if {$libsepdebug == "SEP"} { 82 if {[gdb_gnu_strip_debug $binfile_lib] != 0} { 83 unsupported "could not split debug of $binfile_lib." 84 return 85 } else { 86 pass "split solib" 87 } 88 } 89 90 clean_restart $executable 91 92 if ![runto_main] then { 93 fail "can't run to main" 94 return 0 95 } 96 97 gdb_test "display (int) a_global" "1: \\(int\\) a_global = 41" 98 gdb_test "display (int) b_global" "2: \\(int\\) b_global = 42" 99 gdb_test "display (int) c_global" "3: \\(int\\) c_global = 43" 100 101 if { [gdb_start_cmd] < 0 } { 102 fail "can't run to main (2)" 103 continue 104 } 105 106 gdb_test "" [multi_line \ 107 "1: \\(int\\) a_global = 41" \ 108 "2: \\(int\\) b_global = 42" \ 109 "3: \\(int\\) c_global = 43" \ 110 ] "after rerun" 111 112 # Now rebuild the library without b_global 113 if { [gdb_compile_shlib ${srcfile_lib} ${binfile_lib} \ 114 "$sep_lib_flags additional_flags=-DNO_B_GLOBAL"] != ""} { 115 fail "can't rebuild $binfile_lib" 116 } 117 118 if {$libsepdebug == "SEP"} { 119 set test "split solib second time" 120 if {[gdb_gnu_strip_debug $binfile_lib] != 0} { 121 fail $test 122 continue 123 } else { 124 pass $test 125 } 126 } 127 128 if { [gdb_start_cmd] < 0 } { 129 fail "can't run to main (3)" 130 continue 131 } 132 133 134 gdb_test "" [multi_line \ 135 "1: \\(int\\) a_global = 41" \ 136 "warning: .*b_global.*" \ 137 "3: \\(int\\) c_global = 43" \ 138 ] "after rerun (2)" 139 140 # Now verify that displays which are not in the shared library 141 # are not cleared permaturely. 142 143 gdb_test "break [gdb_get_line_number "break here" ${testfile}.c]" \ 144 ".*Breakpoint.* at .*" 145 146 gdb_test "continue" 147 gdb_test "display main_global" "4: main_global = 44" 148 gdb_test "display a_local" "5: a_local = 45" 149 gdb_test "display a_static" "6: a_static = 46" 150 151 if { [gdb_start_cmd] < 0 } { 152 fail "can't run to main (4)" 153 continue 154 } 155 156 gdb_test "" "6: a_static = 46\\r\\n4: main_global = 44\\r\\n.*" 157 gdb_test "break [gdb_get_line_number "break here" ${testfile}.c]" \ 158 ".*Breakpoint.* at .*" 159 gdb_test "continue" [multi_line \ 160 "4: main_global = 44" \ 161 "5: a_local = 45" \ 162 "6: a_static = 46" \ 163 ] 164}} 165