gdb/testsuite/gdb.base/ctxobj.exp

   1 # Copyright 2012-2024 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 require allow_shlib_tests
  17
  18 set executable ctxobj-m
  19
  20 # The sources used to build two shared libraries (SO).  We use the exact
  21 # same sources to build both SOs, but differentiate them through the use
  22 # of macros defined when calling the compiler.
  23 #
  24 # We need two source files per SO, because we need to test the situation
  25 # where we are trying to print the value of a global variable defined
  26 # in that SO while the variable's associated symtab has not been created
  27 # yet.
  28 set libsrc [list "${srcdir}/${subdir}/ctxobj-v.c" \
  29                  "${srcdir}/${subdir}/ctxobj-f.c"]
  30
  31 set libobj1 [standard_output_file libctxobj1.so]
  32 set libobj2 [standard_output_file libctxobj2.so]
  33
  34 set libobj1_opts { debug
  35                    additional_flags=-DVERSION=104
  36                    additional_flags=-DGET_VERSION=get_version_1 }
  37 set libobj2_opts { debug
  38                    additional_flags=-DVERSION=203
  39                    additional_flags=-DGET_VERSION=get_version_2 }
  40
  41 if { [gdb_compile_shlib $libsrc $libobj1 $libobj1_opts ] != "" } {
  42     return -1
  43 }
  44 if { [gdb_compile_shlib $libsrc $libobj2 $libobj2_opts ] != "" } {
  45     return -1
  46 }
  47 if { [gdb_compile "${srcdir}/${subdir}/${executable}.c" \
  48                   [standard_output_file ${executable}] \
  49                   executable \
  50                   [list debug shlib=${libobj1} shlib=${libobj2}]]
  51      != ""} {
  52     return -1
  53 }
  54
  55 clean_restart $executable
  56 gdb_load_shlib $libobj1
  57 gdb_load_shlib $libobj2
  58
  59 if ![runto_main] {
  60     return -1
  61 }
  62
  63 set bp_location [gdb_get_line_number "STOP" "ctxobj-f.c"]
  64 gdb_test "break ctxobj-f.c:$bp_location" \
  65          "Breakpoint \[0-9\]+ at 0x\[0-9a-fA-F\]+: .*" \
  66          "break in get_version functions"
  67
  68 global expect_out
  69 set test "continue to get_version_1"
  70 gdb_test_multiple "continue" $test {
  71     -re "Breakpoint ($bkptno_num_re), get_version_1 \\(\\).*\r\n.*$gdb_prompt $" {
  72         set bpno $expect_out(1,string)
  73         pass $test
  74     }
  75 }
  76 # Verify $_hit_bpnum.$_hit_locno convenience variables are set to the hit bpno.
  77 gdb_test "printf \"%d.%d\\n\", \$_hit_bpnum, \$_hit_locno" "$bpno" \
  78     "$test \$_hit_bpnum.\$_hit_locno is $bpno"
  79
  80 # Try printing "this_version_num".  There are two global variables
  81 # with that name, and some systems such as GNU/Linux merge them
  82 # into one single entity, while some other systems such as Windows
  83 # keep them separate.  In the first situation, we have to verify
  84 # that GDB does not randomly select the wrong instance.  And in
  85 # the second case, we have to verify that GDB prints the value
  86 # of the instance from the current debugging context (the shared
  87 # library currently being debugged).
  88 #
  89 # We perform two tests: The first print test verifies that we are
  90 # doing things right when the partial symtab hasn't been expanded.
  91 # And the second print test will do the same, but after the partial
  92 # symtab has been expanded.
  93 #
  94 # To avoid adding target-specific code in this testcase, the program
  95 # sets a local variable named 'v' with the value of the global
  96 # variable 'this_version_number'.  This allows us to compare the value
  97 # that GDB thinks 'this_version_num' has, against the actual value
  98 # seen by the program itself.
  99
 100 gdb_test "print this_version_num == v" \
 101          " = 1" \
 102         "print libctxobj1's this_version_num from partial symtab"
 103
 104 gdb_test "print this_version_num == v" \
 105          " = 1" \
 106         "print libctxobj1's this_version_num from symtab"
 107
 108 # Do the same, but from get_version_2.
 109 set test "continue to get_version_2"
 110 gdb_test_multiple "continue" $test {
 111     -re "Breakpoint ($bkptno_num_re), get_version_2 \\(\\).*\r\n.*$gdb_prompt $" {
 112         set bpno $expect_out(1,string)
 113         pass $test
 114     }
 115 }
 116 # Verify the $_hit_bpnum.$_hit_locno convenience variables are set to the hit bpno.
 117 gdb_test "printf \"%d.%d\\n\", \$_hit_bpnum, \$_hit_locno" "$bpno" \
 118     "$test \$_hit_bpnum.\$_hit_locno is $bpno"
 119
 120 gdb_test "print this_version_num == v" \
 121          " = 1" \
 122         "print libctxobj2's this_version_num from partial symtab"
 123
 124 gdb_test "print this_version_num == v" \
 125          " = 1" \
 126         "print libctxobj2's this_version_num from symtab"