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

   1 # Copyright (C) 2010-2020 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 # Check that we find all static symbols before the inferior has
  33 # started, at which point some of the symtabs might not have been
  34 # expanded.
  35 gdb_test "python print (len (gdb.lookup_static_symbols ('rr')))" \
  36     "2" "print (len (gdb.lookup_static_symbols ('rr')))"
  37
  38 # Restart so we don't have expanded symtabs after the previous test.
  39 clean_restart ${binfile}
  40
  41 # Test looking up a global symbol before we runto_main as this is the
  42 # point where we don't have a current frame, and we don't want to
  43 # require one.
  44 gdb_py_test_silent_cmd "python main_func = gdb.lookup_global_symbol(\"main\")" "Lookup main" 1
  45 gdb_test "python print (main_func.is_function)" "True" "test main_func.is_function"
  46 gdb_test "python print (gdb.lookup_global_symbol(\"junk\"))" "None" "test lookup_global_symbol(\"junk\")"
  47
  48 gdb_test "python print (gdb.lookup_global_symbol('main').value())" "$hex .main." \
  49     "print value of main"
  50
  51 set qq_line [gdb_get_line_number "line of qq"]
  52 gdb_test "python print (gdb.lookup_global_symbol('qq').line)" "$qq_line" \
  53     "print line number of qq"
  54
  55 gdb_test "python print (gdb.lookup_global_symbol('qq').value())" "72" \
  56     "print value of qq"
  57
  58 gdb_test "python print (gdb.lookup_global_symbol('qq').needs_frame)" \
  59     "False" \
  60     "print whether qq needs a frame"
  61
  62 # Similarly, test looking up a static symbol before we runto_main.
  63 set rr_line [gdb_get_line_number "line of rr"]
  64 gdb_test "python print (gdb.lookup_global_symbol ('rr') is None)" "True" \
  65     "lookup_global_symbol for static var"
  66
  67 gdb_test "python print (gdb.lookup_static_symbol ('rr').line)" "$rr_line" \
  68     "print line number of rr"
  69
  70 gdb_test "python print (gdb.lookup_static_symbol ('rr').value ())" "42" \
  71     "print value of rr"
  72
  73 gdb_test "python print (gdb.lookup_static_symbol ('rr').needs_frame)" \
  74     "False" \
  75     "print whether rr needs a frame"
  76
  77 gdb_test "python print (gdb.lookup_static_symbol ('nonexistent') is None)" \
  78     "True" "lookup_static_symbol for nonexistent var"
  79
  80 gdb_test "python print (gdb.lookup_static_symbol ('qq') is None)" \
  81     "True" "lookup_static_symbol for global var"
  82
  83 if ![runto_main] then {
  84     fail "can't run to main"
  85     return 0
  86 }
  87
  88 global hex decimal
  89
  90 gdb_breakpoint [gdb_get_line_number "Block break here."]
  91 gdb_continue_to_breakpoint "Block break here."
  92 gdb_py_test_silent_cmd "python frame = gdb.selected_frame()" "Get Frame" 0
  93 gdb_py_test_silent_cmd "python block = frame.block()" "Get block" 0
  94
  95 # Test is_argument attribute.
  96 gdb_py_test_silent_cmd "python arg = gdb.lookup_symbol(\"arg\")" "Get variable arg" 0
  97 gdb_test "python print (arg\[0\].is_variable)" "False" "test arg.is_variable"
  98 gdb_test "python print (arg\[0\].is_constant)" "False" "test arg.is_constant"
  99 gdb_test "python print (arg\[0\].is_argument)" "True" "test arg.is_argument"
 100 gdb_test "python print (arg\[0\].is_function)" "False" "test arg.is_function"
 101
 102 # Test is_function attribute.
 103 gdb_py_test_silent_cmd "python func = block.function" "Get block function" 0
 104 gdb_test "python print (func.is_variable)" "False" "test func.is_variable"
 105 gdb_test "python print (func.is_constant)" "False" "test func.is_constant"
 106 gdb_test "python print (func.is_argument)" "False" "test func.is_argument"
 107 gdb_test "python print (func.is_function)" "True" "test func.is_function"
 108
 109 # Test attributes of func.
 110 gdb_test "python print (func.name)" "func" "test func.name"
 111 gdb_test "python print (func.print_name)" "func" "test func.print_name"
 112 gdb_test "python print (func.linkage_name)" "func" "test func.linkage_name"
 113 gdb_test "python print (func.addr_class == gdb.SYMBOL_LOC_BLOCK)" "True" "test func.addr_class"
 114
 115 # Stop in a second file and ensure we find its local static symbol.
 116 gdb_breakpoint "function_in_other_file"
 117 gdb_continue_to_breakpoint "function_in_other_file"
 118 gdb_test "python print (gdb.lookup_static_symbol ('rr').value ())" "99" \
 119     "print value of rr from other file"
 120 gdb_test "python print (gdb.lookup_static_symbols ('rr')\[0\].value ())" "99" \
 121     "print value of gdb.lookup_static_symbols ('rr')\[0\], from the other file"
 122 gdb_test "python print (gdb.lookup_static_symbols ('rr')\[1\].value ())" "42" \
 123     "print value of gdb.lookup_static_symbols ('rr')\[1\], from the other file"
 124
 125 # Now continue back to the first source file.
 126 set linenum [gdb_get_line_number "Break at end."]
 127 gdb_breakpoint "$srcfile:$linenum"
 128 gdb_continue_to_breakpoint "Break at end for variable a" ".*Break at end.*"
 129 gdb_py_test_silent_cmd "python frame = gdb.selected_frame()" "Get Frame" 0
 130
 131 # Check that we find the static sybol local to this file over the
 132 # static symbol from the second source file.
 133 gdb_test "python print (gdb.lookup_static_symbol ('rr').value ())" "42" \
 134     "print value of rr from main file"
 135 gdb_test "python print (gdb.lookup_static_symbols ('rr')\[0\].value ())" "99" \
 136     "print value of gdb.lookup_static_symbols ('rr')\[0\], from the main file"
 137 gdb_test "python print (gdb.lookup_static_symbols ('rr')\[1\].value ())" "42" \
 138     "print value of gdb.lookup_static_symbols ('rr')\[1\], from the main file"
 139
 140 # Test is_variable attribute.
 141 gdb_py_test_silent_cmd "python a = gdb.lookup_symbol(\'a\')" "Get variable a" 0
 142 gdb_test "python print (a\[0\].is_variable)" "True" "test a.is_variable"
 143 gdb_test "python print (a\[0\].is_constant)" "False" "test a.is_constant"
 144 gdb_test "python print (a\[0\].is_argument)" "False" "test a.is_argument"
 145 gdb_test "python print (a\[0\].is_function)" "False" "test a.is_function"
 146
 147 # Test attributes of a.
 148 gdb_test "python print (a\[0\].addr_class == gdb.SYMBOL_LOC_COMPUTED)" "True" "test a.addr_class"
 149
 150 gdb_test "python print (a\[0\].value())" \
 151     "symbol requires a frame to compute its value.*"\
 152     "try to print value of a without a frame"
 153 gdb_test "python print (a\[0\].value(frame))" "0" \
 154     "print value of a"
 155 gdb_test "python print (a\[0\].needs_frame)" "True" \
 156     "print whether a needs a frame"
 157
 158 # Test is_constant attribute
 159 gdb_py_test_silent_cmd "python t = gdb.lookup_symbol(\"one\")" "Get constant t" 0
 160 gdb_test "python print (t\[0\].is_variable)" "False" "test t.is_variable"
 161 gdb_test "python print (t\[0\].is_constant)" "True" "test t.is_constant"
 162 gdb_test "python print (t\[0\].is_argument)" "False" "test t.is_argument"
 163 gdb_test "python print (t\[0\].is_function)" "False" "test t.is_function"
 164
 165 # Test attributes of t.
 166 gdb_test "python print (t\[0\].addr_class == gdb.SYMBOL_LOC_CONST)" "True" "test t.addr_class"
 167
 168 # Test type attribute.
 169 gdb_test "python print (t\[0\].type)" "enum tag" "get type"
 170
 171 # Test symtab attribute.
 172 if { [is_remote host] } {
 173     set py_symbol_c [string_to_regexp $srcfile]
 174 } else {
 175     set py_symbol_c [string_to_regexp ${srcdir}/${subdir}/${srcfile}]
 176 }
 177 gdb_test "python print (t\[0\].symtab)" "${py_symbol_c}" "get symtab"
 178
 179 # C++ tests
 180 # Recompile binary.
 181 lappend opts c++
 182 if {[prepare_for_testing "failed to prepare" "${binfile}-cxx" \
 183          [list $srcfile $srcfile2] $opts]} {
 184     return -1
 185 }
 186
 187 gdb_test "python print (gdb.lookup_global_symbol ('(anonymous namespace)::anon') is None)" \
 188     "True" "anon is None"
 189 gdb_test "python print (gdb.lookup_static_symbol ('(anonymous namespace)::anon').value ())" \
 190     "10" "print value of anon"
 191
 192 if ![runto_main] then {
 193     fail "can't run to main"
 194     return 0
 195 }
 196
 197 gdb_breakpoint [gdb_get_line_number "Break in class."]
 198 gdb_continue_to_breakpoint "Break in class."
 199
 200 gdb_py_test_silent_cmd "python cplusframe = gdb.selected_frame()" "Get Frame at class" 0
 201 gdb_py_test_silent_cmd "python cplusfunc = cplusframe.block().function" "Get function at class" 0
 202
 203 gdb_test "python print (cplusfunc.is_variable)" \
 204     "False" "Test cplusfunc.is_variable"
 205 gdb_test "python print (cplusfunc.is_constant)" \
 206     "False" "Test cplusfunc.is_constant"
 207 gdb_test "python print (cplusfunc.is_argument)" \
 208     "False" "Test cplusfunc.is_argument"
 209 gdb_test "python print (cplusfunc.is_function)" \
 210     "True" "Test cplusfunc.is_function"
 211
 212 gdb_test "python print (cplusfunc.name)" "SimpleClass::valueofi().*" "test method.name"
 213 gdb_test "python print (cplusfunc.print_name)" "SimpleClass::valueofi().*" "test method.print_name"
 214 gdb_test "python print (cplusfunc.linkage_name)" "SimpleClass::valueofi().*" "test method.linkage_name"
 215 gdb_test "python print (cplusfunc.addr_class == gdb.SYMBOL_LOC_BLOCK)" "True" "test method.addr_class"
 216
 217 # Test is_valid when the objfile is unloaded.  This must be the last
 218 # test as it unloads the object file in GDB.
 219 # Start with a fresh gdb.
 220 clean_restart ${binfile}
 221 if ![runto_main] then {
 222     fail "cannot run to main."
 223     return 0
 224 }
 225
 226 gdb_breakpoint [gdb_get_line_number "Break at end."]
 227 gdb_continue_to_breakpoint "Break at end for symbol validity" ".*Break at end.*"
 228 gdb_py_test_silent_cmd "python a = gdb.lookup_symbol(\'a\')" "Get variable a" 0
 229 gdb_test "python print (a\[0\].is_valid())" "True" "test symbol validity"
 230 delete_breakpoints
 231 gdb_unload
 232 gdb_test "python print (a\[0\].is_valid())" "False" "test symbol non-validity"
 233 gdb_test_no_output "python a = None" "test symbol destructor"