forked from Imagelibrary/binutils-gdb
09ff83af3c
When using gdb.lookup_static_symbol I think that GDB should find
static symbols (global symbol with static linkage) from the current
object file ahead of static symbols from other object files.
This means that if we have two source files f1.c and f2.c, and both
files contains 'static int foo;', then when we are stopped in f1.c a
call to 'gdb.lookup_static_symbol ("foo")' will find f1.c::foo, and if
we are stopped in f2.c we would find 'f2.c::foo'.
Given that gdb.lookup_static_symbol always returns a single symbol,
but there can be multiple static symbols with the same name GDB is
always making a choice about which symbols to return. I think that it
makes sense for the choice GDB makes in this case to match what a user
would get on the command line if they asked to 'print foo'.
gdb/testsuite/ChangeLog:
* gdb.python/py-symbol.c: Declare and call function from new
py-symbol-2.c file.
* gdb.python/py-symbol.exp: Compile both source files, and add new
tests for gdb.lookup_static_symbol.
* gdb.python/py-symbol-2.c: New file.
gdb/doc/ChangeLog:
* python.texi (Symbols In Python): Extend documentation for
gdb.lookup_static_symbol.
gdb/ChangeLog:
* python/py-symbol.c (gdbpy_lookup_static_symbol): Lookup in
static block of current object file first. Also fix typo in
header comment.
Change-Id: Ie55dbeb8806f35577b46015deecde27a0ca2ab64
217 lines
8.8 KiB
Plaintext
217 lines
8.8 KiB
Plaintext
# Copyright (C) 2010-2019 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# This file is part of the GDB testsuite. It tests the mechanism
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# exposing values to Python.
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load_lib gdb-python.exp
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standard_testfile py-symbol.c py-symbol-2.c
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set opts { debug additional_flags=-DUSE_TWO_FILES }
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if {[prepare_for_testing "failed to prepare" $testfile \
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[list $srcfile $srcfile2] $opts]} {
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return -1
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}
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# Skip all tests if Python scripting is not enabled.
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if { [skip_python_tests] } { continue }
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# Test looking up a global symbol before we runto_main as this is the
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# point where we don't have a current frame, and we don't want to
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# require one.
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gdb_py_test_silent_cmd "python main_func = gdb.lookup_global_symbol(\"main\")" "Lookup main" 1
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gdb_test "python print (main_func.is_function)" "True" "test main_func.is_function"
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gdb_test "python print (gdb.lookup_global_symbol(\"junk\"))" "None" "test lookup_global_symbol(\"junk\")"
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gdb_test "python print (gdb.lookup_global_symbol('main').value())" "$hex .main." \
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"print value of main"
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set qq_line [gdb_get_line_number "line of qq"]
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gdb_test "python print (gdb.lookup_global_symbol('qq').line)" "$qq_line" \
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"print line number of qq"
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gdb_test "python print (gdb.lookup_global_symbol('qq').value())" "72" \
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"print value of qq"
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gdb_test "python print (gdb.lookup_global_symbol('qq').needs_frame)" \
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"False" \
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"print whether qq needs a frame"
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# Similarly, test looking up a static symbol before we runto_main.
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set rr_line [gdb_get_line_number "line of rr"]
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gdb_test "python print (gdb.lookup_global_symbol ('rr') is None)" "True" \
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"lookup_global_symbol for static var"
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gdb_test "python print (gdb.lookup_static_symbol ('rr').line)" "$rr_line" \
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"print line number of rr"
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gdb_test "python print (gdb.lookup_static_symbol ('rr').value ())" "42" \
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"print value of rr"
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gdb_test "python print (gdb.lookup_static_symbol ('rr').needs_frame)" \
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"False" \
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"print whether rr needs a frame"
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gdb_test "python print (gdb.lookup_static_symbol ('nonexistent') is None)" \
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"True" "lookup_static_symbol for nonexistent var"
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gdb_test "python print (gdb.lookup_static_symbol ('qq') is None)" \
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"True" "lookup_static_symbol for global var"
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if ![runto_main] then {
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fail "can't run to main"
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return 0
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}
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global hex decimal
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gdb_breakpoint [gdb_get_line_number "Block break here."]
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gdb_continue_to_breakpoint "Block break here."
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gdb_py_test_silent_cmd "python frame = gdb.selected_frame()" "Get Frame" 0
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gdb_py_test_silent_cmd "python block = frame.block()" "Get block" 0
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# Test is_argument attribute.
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gdb_py_test_silent_cmd "python arg = gdb.lookup_symbol(\"arg\")" "Get variable arg" 0
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gdb_test "python print (arg\[0\].is_variable)" "False" "test arg.is_variable"
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gdb_test "python print (arg\[0\].is_constant)" "False" "test arg.is_constant"
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gdb_test "python print (arg\[0\].is_argument)" "True" "test arg.is_argument"
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gdb_test "python print (arg\[0\].is_function)" "False" "test arg.is_function"
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# Test is_function attribute.
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gdb_py_test_silent_cmd "python func = block.function" "Get block function" 0
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gdb_test "python print (func.is_variable)" "False" "test func.is_variable"
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gdb_test "python print (func.is_constant)" "False" "test func.is_constant"
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gdb_test "python print (func.is_argument)" "False" "test func.is_argument"
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gdb_test "python print (func.is_function)" "True" "test func.is_function"
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# Test attributes of func.
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gdb_test "python print (func.name)" "func" "test func.name"
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gdb_test "python print (func.print_name)" "func" "test func.print_name"
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gdb_test "python print (func.linkage_name)" "func" "test func.linkage_name"
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gdb_test "python print (func.addr_class == gdb.SYMBOL_LOC_BLOCK)" "True" "test func.addr_class"
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# Stop in a second file and ensure we find its local static symbol.
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gdb_breakpoint "function_in_other_file"
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gdb_continue_to_breakpoint "function_in_other_file"
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gdb_test "python print (gdb.lookup_static_symbol ('rr').value ())" "99" \
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"print value of rr from other file"
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# Now continue back to the first source file.
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set linenum [gdb_get_line_number "Break at end."]
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gdb_breakpoint "$srcfile:$linenum"
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gdb_continue_to_breakpoint "Break at end for variable a" ".*Break at end.*"
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gdb_py_test_silent_cmd "python frame = gdb.selected_frame()" "Get Frame" 0
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# Check that we find the static sybol local to this file over the
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# static symbol from the second source file.
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gdb_test "python print (gdb.lookup_static_symbol ('rr').value ())" "42" \
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"print value of rr from main file"
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# Test is_variable attribute.
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gdb_py_test_silent_cmd "python a = gdb.lookup_symbol(\'a\')" "Get variable a" 0
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gdb_test "python print (a\[0\].is_variable)" "True" "test a.is_variable"
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gdb_test "python print (a\[0\].is_constant)" "False" "test a.is_constant"
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gdb_test "python print (a\[0\].is_argument)" "False" "test a.is_argument"
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gdb_test "python print (a\[0\].is_function)" "False" "test a.is_function"
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# Test attributes of a.
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gdb_test "python print (a\[0\].addr_class == gdb.SYMBOL_LOC_COMPUTED)" "True" "test a.addr_class"
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gdb_test "python print (a\[0\].value())" \
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"symbol requires a frame to compute its value.*"\
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"try to print value of a without a frame"
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gdb_test "python print (a\[0\].value(frame))" "0" \
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"print value of a"
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gdb_test "python print (a\[0\].needs_frame)" "True" \
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"print whether a needs a frame"
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# Test is_constant attribute
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gdb_py_test_silent_cmd "python t = gdb.lookup_symbol(\"one\")" "Get constant t" 0
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gdb_test "python print (t\[0\].is_variable)" "False" "test t.is_variable"
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gdb_test "python print (t\[0\].is_constant)" "True" "test t.is_constant"
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gdb_test "python print (t\[0\].is_argument)" "False" "test t.is_argument"
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gdb_test "python print (t\[0\].is_function)" "False" "test t.is_function"
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# Test attributes of t.
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gdb_test "python print (t\[0\].addr_class == gdb.SYMBOL_LOC_CONST)" "True" "test t.addr_class"
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# Test type attribute.
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gdb_test "python print (t\[0\].type)" "enum tag" "get type"
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# Test symtab attribute.
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if { [is_remote host] } {
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set py_symbol_c [string_to_regexp $srcfile]
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} else {
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set py_symbol_c [string_to_regexp ${srcdir}/${subdir}/${srcfile}]
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}
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gdb_test "python print (t\[0\].symtab)" "${py_symbol_c}" "get symtab"
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# C++ tests
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# Recompile binary.
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lappend opts c++
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if {[prepare_for_testing "failed to prepare" "${binfile}-cxx" \
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[list $srcfile $srcfile2] $opts]} {
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return -1
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}
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gdb_test "python print (gdb.lookup_global_symbol ('(anonymous namespace)::anon') is None)" \
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"True" "anon is None"
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gdb_test "python print (gdb.lookup_static_symbol ('(anonymous namespace)::anon').value ())" \
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"10" "print value of anon"
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if ![runto_main] then {
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fail "can't run to main"
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return 0
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}
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gdb_breakpoint [gdb_get_line_number "Break in class."]
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gdb_continue_to_breakpoint "Break in class."
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gdb_py_test_silent_cmd "python cplusframe = gdb.selected_frame()" "Get Frame at class" 0
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gdb_py_test_silent_cmd "python cplusfunc = cplusframe.block().function" "Get function at class" 0
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gdb_test "python print (cplusfunc.is_variable)" \
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"False" "Test cplusfunc.is_variable"
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gdb_test "python print (cplusfunc.is_constant)" \
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"False" "Test cplusfunc.is_constant"
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gdb_test "python print (cplusfunc.is_argument)" \
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"False" "Test cplusfunc.is_argument"
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gdb_test "python print (cplusfunc.is_function)" \
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"True" "Test cplusfunc.is_function"
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gdb_test "python print (cplusfunc.name)" "SimpleClass::valueofi().*" "test method.name"
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gdb_test "python print (cplusfunc.print_name)" "SimpleClass::valueofi().*" "test method.print_name"
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gdb_test "python print (cplusfunc.linkage_name)" "SimpleClass::valueofi().*" "test method.linkage_name"
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gdb_test "python print (cplusfunc.addr_class == gdb.SYMBOL_LOC_BLOCK)" "True" "test method.addr_class"
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# Test is_valid when the objfile is unloaded. This must be the last
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# test as it unloads the object file in GDB.
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# Start with a fresh gdb.
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clean_restart ${binfile}
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if ![runto_main] then {
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fail "cannot run to main."
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return 0
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}
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gdb_breakpoint [gdb_get_line_number "Break at end."]
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gdb_continue_to_breakpoint "Break at end for symbol validity" ".*Break at end.*"
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gdb_py_test_silent_cmd "python a = gdb.lookup_symbol(\'a\')" "Get variable a" 0
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gdb_test "python print (a\[0\].is_valid())" "True" "test symbol validity"
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delete_breakpoints
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gdb_unload
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gdb_test "python print (a\[0\].is_valid())" "False" "test symbol non-validity"
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gdb_test_no_output "python a = None" "test symbol destructor"
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