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

   1 # Copyright 2013 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 solib-search-path, and in the case of solib-svr4.c whether l_addr_p
  17 # is properly reset when the path is changed.
  18
  19 if {[is_remote target] || [skip_shlib_tests]} {
  20     untested solib-search.exp
  21     return -1
  22 }
  23
  24 # This is required by gdb_compile_shlib.
  25 if {[get_compiler_info]} {
  26     warning "Could not get compiler info"
  27     untested solib-search.exp
  28     return 1
  29 }
  30
  31 # Build "wrong" and "right" versions of the libraries in separate directories.
  32 set wrong_lib_subdir "solib-search-wrong"
  33 set right_lib_subdir "solib-search-right"
  34
  35 # First library file.
  36 set libname1 "solib-search-lib1"
  37 set srcfile1_lib ${srcdir}/${subdir}/${libname1}.c
  38 set wrong_binfile1_lib ${objdir}/${subdir}/${wrong_lib_subdir}/${libname1}.so
  39 set right_binfile1_lib ${objdir}/${subdir}/${right_lib_subdir}/${libname1}.so
  40 # Second library file.
  41 set libname2 "solib-search-lib2"
  42 set srcfile2_lib ${srcdir}/${subdir}/${libname2}.c
  43 set wrong_binfile2_lib ${objdir}/${subdir}/${wrong_lib_subdir}/${libname2}.so
  44 set right_binfile2_lib ${objdir}/${subdir}/${right_lib_subdir}/${libname2}.so
  45 # Link with the library that lives here.
  46 # This is so that we can replace what gdb sees with the wrong copy,
  47 # and then tell gdb to use the right copy that lives someplace else.
  48 set binfile1_lib ${objdir}/${subdir}/${libname1}.so
  49 set binfile2_lib ${objdir}/${subdir}/${libname2}.so
  50
  51 set lib_flags [list debug ldflags=-Wl,-Bsymbolic]
  52 set wrong_lib_flags "$lib_flags additional_flags=-DARRAY_SIZE=1"
  53 set right_lib_flags "$lib_flags additional_flags=-DARRAY_SIZE=8192 -DRIGHT"
  54
  55 # Binary file.
  56 set testfile "solib-search"
  57 set srcfile ${srcdir}/${subdir}/${testfile}.c
  58 set binfile ${objdir}/${subdir}/${testfile}
  59 set bin_flags [list debug shlib=${binfile1_lib} shlib=${binfile2_lib}]
  60
  61 remote_exec build "rm -rf ${subdir}/${wrong_lib_subdir}"
  62 remote_exec build "rm -rf ${subdir}/${right_lib_subdir}"
  63 remote_exec build "mkdir ${subdir}/${wrong_lib_subdir}"
  64 remote_exec build "mkdir ${subdir}/${right_lib_subdir}"
  65
  66 if { [gdb_compile_shlib ${srcfile1_lib} ${wrong_binfile1_lib} $wrong_lib_flags] != ""
  67      || [gdb_compile_shlib ${srcfile2_lib} ${wrong_binfile2_lib} $wrong_lib_flags] != ""
  68      || [gdb_compile_shlib ${srcfile1_lib} ${right_binfile1_lib} $right_lib_flags] != ""
  69      || [gdb_compile_shlib ${srcfile2_lib} ${right_binfile2_lib} $right_lib_flags] != "" } {
  70     untested "Could not compile libs."
  71     return -1
  72 }
  73
  74 # Build the test binary using the right copies of the libraries.
  75 remote_exec build "ln -sf ${right_lib_subdir}/${libname1}.so ${binfile1_lib}"
  76 remote_exec build "ln -sf ${right_lib_subdir}/${libname2}.so ${binfile2_lib}"
  77 if { [gdb_compile ${srcfile} ${binfile} executable $bin_flags] != "" } {
  78     untested "Could not compile $binfile."
  79     return -1
  80 }
  81
  82 clean_restart $testfile
  83
  84 if { ![runto_main] } {
  85     fail "Can't run to main"
  86     return
  87 }
  88
  89 gdb_breakpoint "break_here"
  90 gdb_continue "break_here"
  91
  92 set corefile "${objdir}/${subdir}/solib-search.core"
  93 set core_supported [gdb_gcore_cmd "$corefile" "save a corefile"]
  94
  95 if {!$core_supported} {
  96   return -1
  97 }
  98
  99 # Before we restart gdb, replace the libs with the "wrong" ones.
 100 remote_exec build "ln -sf ${wrong_lib_subdir}/${libname1}.so ${binfile1_lib}"
 101 remote_exec build "ln -sf ${wrong_lib_subdir}/${libname2}.so ${binfile2_lib}"
 102
 103 clean_restart $testfile
 104
 105 set core_loaded [gdb_core_cmd $corefile "re-load generated corefile"]
 106 if { $core_loaded == -1 } {
 107     # No use proceeding from here.
 108     return
 109 }
 110
 111 proc test_backtrace { expect_fail } {
 112     global gdb_prompt
 113
 114     set count 0
 115     set total_expected 5
 116
 117     if { $expect_fail } {
 118         set testname "backtrace (with wrong libs)"
 119     } else {
 120         set testname "backtrace (with right libs)"
 121     }
 122     # N.B. The order of the tests here is important.
 123     # We need to count each function in the backtrace, and expect matches
 124     # the first one it finds.
 125     gdb_test_multiple "backtrace" $testname {
 126         -re "\[^\r\n\]* in lib2_func4 \[^\r\n\]*" {
 127             incr count
 128             exp_continue
 129         }
 130         -re "\[^\r\n\]* in lib1_func3 \[^\r\n\]*" {
 131             incr count
 132             exp_continue
 133         }
 134         -re "\[^\r\n\]* in lib2_func2 \[^\r\n\]*" {
 135             incr count
 136             exp_continue
 137         }
 138         -re "\[^\r\n\]* in lib1_func1 \[^\r\n\]*" {
 139             incr count
 140             exp_continue
 141         }
 142         -re "\[^\r\n\]* in main \[^\r\n\]*" {
 143             incr count
 144             exp_continue
 145         }
 146         -re "\[\r\n\]$gdb_prompt $" {
 147             pass "$testname (data collection)"
 148         }
 149     }
 150
 151     set fail 0
 152     if { $expect_fail } {
 153         # If the backtrace output is correct the test isn't sufficiently
 154         # testing what it should.
 155         if { $count == $total_expected } {
 156             set fail 1
 157         }
 158     } else {
 159         if { $count != $total_expected } {
 160             set fail 1
 161         }
 162     }
 163     if { $fail } {
 164         fail $testname
 165     } else {
 166         pass $testname
 167     }
 168 }
 169
 170 # Verify the backtrace is messed up.
 171 test_backtrace 1
 172
 173 # Remove the copies gdb currently sees: the absolute path is encoded in
 174 # the core file and we want gdb to find the right copies elsewhere.
 175 remote_exec build "rm -f ${binfile1_lib}"
 176 remote_exec build "rm -f ${binfile2_lib}"
 177 # Set solib-search-path to use the correct copies of libraries.
 178 gdb_test "set solib-search-path ${objdir}/${subdir}/${right_lib_subdir}"
 179
 180 # Verify gdb has properly updated the location of the libraries.
 181 test_backtrace 0
 182 gdb_test "p lib1_size" " = 8192"
 183 gdb_test "p lib2_size" " = 8192"
 184