gdb/testsuite/gdb.base/ctxobj.exp

   1 # Copyright 2012-2023 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 if {[skip_shlib_tests]} {
  17     return -1
  18 }
  19
  20 set executable ctxobj-m
  21
  22 # The sources used to build two shared libraries (SO).  We use the exact
  23 # same sources to build both SOs, but differentiate them through the use
  24 # of macros defined when calling the compiler.
  25 #
  26 # We need two source files per SO, because we need to test the situation
  27 # where we are trying to print the value of a global variable defined
  28 # in that SO while the variable's associated symtab has not been created
  29 # yet.
  30 set libsrc [list "${srcdir}/${subdir}/ctxobj-v.c" \
  31                  "${srcdir}/${subdir}/ctxobj-f.c"]
  32
  33 set libobj1 [standard_output_file libctxobj1.so]
  34 set libobj2 [standard_output_file libctxobj2.so]
  35
  36 set libobj1_opts { debug
  37                    additional_flags=-DVERSION=104
  38                    additional_flags=-DGET_VERSION=get_version_1 }
  39 set libobj2_opts { debug
  40                    additional_flags=-DVERSION=203
  41                    additional_flags=-DGET_VERSION=get_version_2 }
  42
  43 if { [gdb_compile_shlib $libsrc $libobj1 $libobj1_opts ] != "" } {
  44     return -1
  45 }
  46 if { [gdb_compile_shlib $libsrc $libobj2 $libobj2_opts ] != "" } {
  47     return -1
  48 }
  49 if { [gdb_compile "${srcdir}/${subdir}/${executable}.c" \
  50                   [standard_output_file ${executable}] \
  51                   executable \
  52                   [list debug shlib=${libobj1} shlib=${libobj2}]]
  53      != ""} {
  54     return -1
  55 }
  56
  57 clean_restart $executable
  58 gdb_load_shlib $libobj1
  59 gdb_load_shlib $libobj2
  60
  61 if ![runto_main] {
  62     return -1
  63 }
  64
  65 set bp_location [gdb_get_line_number "STOP" "ctxobj-f.c"]
  66 gdb_test "break ctxobj-f.c:$bp_location" \
  67          "Breakpoint \[0-9\]+ at 0x\[0-9a-fA-F\]+: .*" \
  68          "break in get_version functions"
  69
  70 global expect_out
  71 set test "continue to get_version_1"
  72 gdb_test_multiple "continue" $test {
  73     -re "Breakpoint ($bkptno_num_re), get_version_1 \\(\\).*\r\n.*$gdb_prompt $" {
  74         set bpno $expect_out(1,string)
  75         pass $test
  76     }
  77 }
  78 # Verify $_hit_bpnum.$_hit_locno convenience variables are set to the hit bpno.
  79 gdb_test "printf \"%d.%d\\n\", \$_hit_bpnum, \$_hit_locno" "$bpno" \
  80     "$test \$_hit_bpnum.\$_hit_locno is $bpno"
  81
  82 # Try printing "this_version_num".  There are two global variables
  83 # with that name, and some systems such as GNU/Linux merge them
  84 # into one single entity, while some other systems such as Windows
  85 # keep them separate.  In the first situation, we have to verify
  86 # that GDB does not randomly select the wrong instance.  And in
  87 # the second case, we have to verify that GDB prints the value
  88 # of the instance from the current debugging context (the shared
  89 # library currently being debugged).
  90 #
  91 # We perform two tests: The first print test verifies that we are
  92 # doing things right when the partial symtab hasn't been expanded.
  93 # And the second print test will do the same, but after the partial
  94 # symtab has been expanded.
  95 #
  96 # To avoid adding target-specific code in this testcase, the program
  97 # sets a local variable named 'v' with the value of the global
  98 # variable 'this_version_number'.  This allows us to compare the value
  99 # that GDB thinks 'this_version_num' has, against the actual value
 100 # seen by the program itself.
 101
 102 gdb_test "print this_version_num == v" \
 103          " = 1" \
 104         "print libctxobj1's this_version_num from partial symtab"
 105
 106 gdb_test "print this_version_num == v" \
 107          " = 1" \
 108         "print libctxobj1's this_version_num from symtab"
 109
 110 # Do the same, but from get_version_2.
 111 set test "continue to get_version_2"
 112 gdb_test_multiple "continue" $test {
 113     -re "Breakpoint ($bkptno_num_re), get_version_2 \\(\\).*\r\n.*$gdb_prompt $" {
 114         set bpno $expect_out(1,string)
 115         pass $test
 116     }
 117 }
 118 # Verify the $_hit_bpnum.$_hit_locno convenience variables are set to the hit bpno.
 119 gdb_test "printf \"%d.%d\\n\", \$_hit_bpnum, \$_hit_locno" "$bpno" \
 120     "$test \$_hit_bpnum.\$_hit_locno is $bpno"
 121
 122 gdb_test "print this_version_num == v" \
 123          " = 1" \
 124         "print libctxobj2's this_version_num from partial symtab"
 125
 126 gdb_test "print this_version_num == v" \
 127          " = 1" \
 128         "print libctxobj2's this_version_num from symtab"