gdb/testsuite/gdb.base/ctxobj.exp

   1 # Copyright 2012-2022 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 $libobj2
  60
  61 if ![runto_main] {
  62     untested "could not run to main"
  63     return -1
  64 }
  65
  66 set bp_location [gdb_get_line_number "STOP" "ctxobj-f.c"]
  67 gdb_test "break ctxobj-f.c:$bp_location" \
  68          "Breakpoint \[0-9\]+ at 0x\[0-9a-fA-F\]+: .*" \
  69          "break in get_version functions"
  70
  71 gdb_test "continue" \
  72          "Breakpoint $decimal, get_version_1 \\(\\).*" \
  73          "continue to get_version_1"
  74
  75 # Try printing "this_version_num".  There are two global variables
  76 # with that name, and some systems such as GNU/Linux merge them
  77 # into one single entity, while some other systems such as Windows
  78 # keep them separate.  In the first situation, we have to verify
  79 # that GDB does not randomly select the wrong instance.  And in
  80 # the second case, we have to verify that GDB prints the value
  81 # of the instance from the current debugging context (the shared
  82 # library currently being debugged).
  83 #
  84 # We perform two tests: The first print test verifies that we are
  85 # doing things right when the partial symtab hasn't been expanded.
  86 # And the second print test will do the same, but after the partial
  87 # symtab has been expanded.
  88 #
  89 # To avoid adding target-specific code in this testcase, the program
  90 # sets a local variable named 'v' with the value of the global
  91 # variable 'this_version_number'.  This allows us to compare the value
  92 # that GDB thinks 'this_version_num' has, against the actual value
  93 # seen by the program itself.
  94
  95 gdb_test "print this_version_num == v" \
  96          " = 1" \
  97         "print libctxobj1's this_version_num from partial symtab"
  98
  99 gdb_test "print this_version_num == v" \
 100          " = 1" \
 101         "print libctxobj1's this_version_num from symtab"
 102
 103 # Do the same, but from get_version_2.
 104
 105 gdb_test "continue" \
 106          "Breakpoint $decimal, get_version_2 \\(\\).*" \
 107          "continue to get_version_2"
 108
 109 gdb_test "print this_version_num == v" \
 110          " = 1" \
 111         "print libctxobj2's this_version_num from partial symtab"
 112
 113 gdb_test "print this_version_num == v" \
 114          " = 1" \
 115         "print libctxobj2's this_version_num from symtab"