gdb/testsuite/gdb.python/py-symbol.exp

   1 # Copyright (C) 2010-2019 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 # This file is part of the GDB testsuite.  It tests the mechanism
  17 # exposing values to Python.
  18
  19 load_lib gdb-python.exp
  20
  21 standard_testfile py-symbol.c py-symbol-2.c
  22
  23 set opts { debug additional_flags=-DUSE_TWO_FILES }
  24 if {[prepare_for_testing "failed to prepare" $testfile \
  25          [list $srcfile $srcfile2] $opts]} {
  26     return -1
  27 }
  28
  29 # Skip all tests if Python scripting is not enabled.
  30 if { [skip_python_tests] } { continue }
  31
  32 # Test looking up a global symbol before we runto_main as this is the
  33 # point where we don't have a current frame, and we don't want to
  34 # require one.
  35 gdb_py_test_silent_cmd "python main_func = gdb.lookup_global_symbol(\"main\")" "Lookup main" 1
  36 gdb_test "python print (main_func.is_function)" "True" "test main_func.is_function"
  37 gdb_test "python print (gdb.lookup_global_symbol(\"junk\"))" "None" "test lookup_global_symbol(\"junk\")"
  38
  39 gdb_test "python print (gdb.lookup_global_symbol('main').value())" "$hex .main." \
  40     "print value of main"
  41
  42 set qq_line [gdb_get_line_number "line of qq"]
  43 gdb_test "python print (gdb.lookup_global_symbol('qq').line)" "$qq_line" \
  44     "print line number of qq"
  45
  46 gdb_test "python print (gdb.lookup_global_symbol('qq').value())" "72" \
  47     "print value of qq"
  48
  49 gdb_test "python print (gdb.lookup_global_symbol('qq').needs_frame)" \
  50     "False" \
  51     "print whether qq needs a frame"
  52
  53 # Similarly, test looking up a static symbol before we runto_main.
  54 set rr_line [gdb_get_line_number "line of rr"]
  55 gdb_test "python print (gdb.lookup_global_symbol ('rr') is None)" "True" \
  56     "lookup_global_symbol for static var"
  57
  58 gdb_test "python print (gdb.lookup_static_symbol ('rr').line)" "$rr_line" \
  59     "print line number of rr"
  60
  61 gdb_test "python print (gdb.lookup_static_symbol ('rr').value ())" "42" \
  62     "print value of rr"
  63
  64 gdb_test "python print (gdb.lookup_static_symbol ('rr').needs_frame)" \
  65     "False" \
  66     "print whether rr needs a frame"
  67
  68 gdb_test "python print (gdb.lookup_static_symbol ('nonexistent') is None)" \
  69     "True" "lookup_static_symbol for nonexistent var"
  70
  71 gdb_test "python print (gdb.lookup_static_symbol ('qq') is None)" \
  72     "True" "lookup_static_symbol for global var"
  73
  74 if ![runto_main] then {
  75     fail "can't run to main"
  76     return 0
  77 }
  78
  79 global hex decimal
  80
  81 gdb_breakpoint [gdb_get_line_number "Block break here."]
  82 gdb_continue_to_breakpoint "Block break here."
  83 gdb_py_test_silent_cmd "python frame = gdb.selected_frame()" "Get Frame" 0
  84 gdb_py_test_silent_cmd "python block = frame.block()" "Get block" 0
  85
  86 # Test is_argument attribute.
  87 gdb_py_test_silent_cmd "python arg = gdb.lookup_symbol(\"arg\")" "Get variable arg" 0
  88 gdb_test "python print (arg\[0\].is_variable)" "False" "test arg.is_variable"
  89 gdb_test "python print (arg\[0\].is_constant)" "False" "test arg.is_constant"
  90 gdb_test "python print (arg\[0\].is_argument)" "True" "test arg.is_argument"
  91 gdb_test "python print (arg\[0\].is_function)" "False" "test arg.is_function"
  92
  93 # Test is_function attribute.
  94 gdb_py_test_silent_cmd "python func = block.function" "Get block function" 0
  95 gdb_test "python print (func.is_variable)" "False" "test func.is_variable"
  96 gdb_test "python print (func.is_constant)" "False" "test func.is_constant"
  97 gdb_test "python print (func.is_argument)" "False" "test func.is_argument"
  98 gdb_test "python print (func.is_function)" "True" "test func.is_function"
  99
 100 # Test attributes of func.
 101 gdb_test "python print (func.name)" "func" "test func.name"
 102 gdb_test "python print (func.print_name)" "func" "test func.print_name"
 103 gdb_test "python print (func.linkage_name)" "func" "test func.linkage_name"
 104 gdb_test "python print (func.addr_class == gdb.SYMBOL_LOC_BLOCK)" "True" "test func.addr_class"
 105
 106 # Stop in a second file and ensure we find its local static symbol.
 107 gdb_breakpoint "function_in_other_file"
 108 gdb_continue_to_breakpoint "function_in_other_file"
 109 gdb_test "python print (gdb.lookup_static_symbol ('rr').value ())" "99" \
 110     "print value of rr from other file"
 111
 112 # Now continue back to the first source file.
 113 set linenum [gdb_get_line_number "Break at end."]
 114 gdb_breakpoint "$srcfile:$linenum"
 115 gdb_continue_to_breakpoint "Break at end for variable a" ".*Break at end.*"
 116 gdb_py_test_silent_cmd "python frame = gdb.selected_frame()" "Get Frame" 0
 117
 118 # Check that we find the static sybol local to this file over the
 119 # static symbol from the second source file.
 120 gdb_test "python print (gdb.lookup_static_symbol ('rr').value ())" "42" \
 121     "print value of rr from main file"
 122
 123 # Test is_variable attribute.
 124 gdb_py_test_silent_cmd "python a = gdb.lookup_symbol(\'a\')" "Get variable a" 0
 125 gdb_test "python print (a\[0\].is_variable)" "True" "test a.is_variable"
 126 gdb_test "python print (a\[0\].is_constant)" "False" "test a.is_constant"
 127 gdb_test "python print (a\[0\].is_argument)" "False" "test a.is_argument"
 128 gdb_test "python print (a\[0\].is_function)" "False" "test a.is_function"
 129
 130 # Test attributes of a.
 131 gdb_test "python print (a\[0\].addr_class == gdb.SYMBOL_LOC_COMPUTED)" "True" "test a.addr_class"
 132
 133 gdb_test "python print (a\[0\].value())" \
 134     "symbol requires a frame to compute its value.*"\
 135     "try to print value of a without a frame"
 136 gdb_test "python print (a\[0\].value(frame))" "0" \
 137     "print value of a"
 138 gdb_test "python print (a\[0\].needs_frame)" "True" \
 139     "print whether a needs a frame"
 140
 141 # Test is_constant attribute
 142 gdb_py_test_silent_cmd "python t = gdb.lookup_symbol(\"one\")" "Get constant t" 0
 143 gdb_test "python print (t\[0\].is_variable)" "False" "test t.is_variable"
 144 gdb_test "python print (t\[0\].is_constant)" "True" "test t.is_constant"
 145 gdb_test "python print (t\[0\].is_argument)" "False" "test t.is_argument"
 146 gdb_test "python print (t\[0\].is_function)" "False" "test t.is_function"
 147
 148 # Test attributes of t.
 149 gdb_test "python print (t\[0\].addr_class == gdb.SYMBOL_LOC_CONST)" "True" "test t.addr_class"
 150
 151 # Test type attribute.
 152 gdb_test "python print (t\[0\].type)" "enum tag" "get type"
 153
 154 # Test symtab attribute.
 155 if { [is_remote host] } {
 156     set py_symbol_c [string_to_regexp $srcfile]
 157 } else {
 158     set py_symbol_c [string_to_regexp ${srcdir}/${subdir}/${srcfile}]
 159 }
 160 gdb_test "python print (t\[0\].symtab)" "${py_symbol_c}" "get symtab"
 161
 162 # C++ tests
 163 # Recompile binary.
 164 lappend opts c++
 165 if {[prepare_for_testing "failed to prepare" "${binfile}-cxx" \
 166          [list $srcfile $srcfile2] $opts]} {
 167     return -1
 168 }
 169
 170 gdb_test "python print (gdb.lookup_global_symbol ('(anonymous namespace)::anon') is None)" \
 171     "True" "anon is None"
 172 gdb_test "python print (gdb.lookup_static_symbol ('(anonymous namespace)::anon').value ())" \
 173     "10" "print value of anon"
 174
 175 if ![runto_main] then {
 176     fail "can't run to main"
 177     return 0
 178 }
 179
 180 gdb_breakpoint [gdb_get_line_number "Break in class."]
 181 gdb_continue_to_breakpoint "Break in class."
 182
 183 gdb_py_test_silent_cmd "python cplusframe = gdb.selected_frame()" "Get Frame at class" 0
 184 gdb_py_test_silent_cmd "python cplusfunc = cplusframe.block().function" "Get function at class" 0
 185
 186 gdb_test "python print (cplusfunc.is_variable)" \
 187     "False" "Test cplusfunc.is_variable"
 188 gdb_test "python print (cplusfunc.is_constant)" \
 189     "False" "Test cplusfunc.is_constant"
 190 gdb_test "python print (cplusfunc.is_argument)" \
 191     "False" "Test cplusfunc.is_argument"
 192 gdb_test "python print (cplusfunc.is_function)" \
 193     "True" "Test cplusfunc.is_function"
 194
 195 gdb_test "python print (cplusfunc.name)" "SimpleClass::valueofi().*" "test method.name"
 196 gdb_test "python print (cplusfunc.print_name)" "SimpleClass::valueofi().*" "test method.print_name"
 197 gdb_test "python print (cplusfunc.linkage_name)" "SimpleClass::valueofi().*" "test method.linkage_name"
 198 gdb_test "python print (cplusfunc.addr_class == gdb.SYMBOL_LOC_BLOCK)" "True" "test method.addr_class"
 199
 200 # Test is_valid when the objfile is unloaded.  This must be the last
 201 # test as it unloads the object file in GDB.
 202 # Start with a fresh gdb.
 203 clean_restart ${binfile}
 204 if ![runto_main] then {
 205     fail "cannot run to main."
 206     return 0
 207 }
 208
 209 gdb_breakpoint [gdb_get_line_number "Break at end."]
 210 gdb_continue_to_breakpoint "Break at end for symbol validity" ".*Break at end.*"
 211 gdb_py_test_silent_cmd "python a = gdb.lookup_symbol(\'a\')" "Get variable a" 0
 212 gdb_test "python print (a\[0\].is_valid())" "True" "test symbol validity"
 213 delete_breakpoints
 214 gdb_unload
 215 gdb_test "python print (a\[0\].is_valid())" "False" "test symbol non-validity"
 216 gdb_test_no_output "python a = None" "test symbol destructor"