b5916bbd42
The testcase, at some point, is trying to change the contents
of a string that was defined as follow:
char *str = "hello, testsuite";
The problem is that the string is constant, and str is never used
to change the contents of the string in the program, so the compiler
is free to allocate it in a read-only section. This is what happens
on x86-windows, for instance.
As a result, trying to change the contents of the string during
the `python gdb.inferiors()[0].write_memory (addr, str)' results
in the following error:
(gdb) python gdb.inferiors()[0].write_memory (addr, str)
gdb: write target memory, 5 bytes at 0x00403064
Traceback (most recent call last):
File "<string>", line 1, in <module>
gdb.MemoryError: Cannot access memory at address 0x403064
Error while executing Python code.
This patch prevents this from happening by declaring str as an
array rather than a pointer.
gdb/testsuite/ChangeLog:
* gdb.python/py-inferior.c (f2): Make str an array rather
than a pointer.
* gdb.python/py-inferior.exp: Adjust testcase accordingly.
213 lines
9.2 KiB
Text
213 lines
9.2 KiB
Text
# Copyright (C) 2009, 2010, 2011 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 inferiors to Python.
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if $tracelevel then {
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strace $tracelevel
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}
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load_lib gdb-python.exp
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set testfile "py-inferior"
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set srcfile ${testfile}.c
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if { [prepare_for_testing ${testfile}.exp ${testfile} ${srcfile}] } {
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return -1
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}
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# Start with a fresh gdb.
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clean_restart ${testfile}
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# Skip all tests if Python scripting is not enabled.
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if { [skip_python_tests] } { continue }
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gdb_test_multiple "show endian" "getting target endian" {
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-re ".*little endian.*$gdb_prompt $" {
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set python_pack_char "<"
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# pass silently
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}
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-re ".*big endian.*$gdb_prompt $" {
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set python_pack_char ">"
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# pass silently
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}
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}
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# The following tests require execution.
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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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runto [gdb_get_line_number "Break here."]
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# Test basic gdb.Inferior attributes and methods.
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gdb_py_test_silent_cmd "python inferiors = gdb.inferiors ()" "get inferiors list" 1
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gdb_test "python print inferiors" "\\(<gdb.Inferior object at 0x\[\[:xdigit:\]\]+>,\\)" "verify inferiors list"
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gdb_py_test_silent_cmd "python i0 = inferiors\[0\]" "get first inferior" 0
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gdb_test "python print 'result =', i0 == inferiors\[0\]" " = True" "test equality comparison (true)"
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gdb_test "python print 'result =', i0.num" " = \[0-9\]+" "test Inferior.num"
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gdb_test "python print 'result =', i0.pid" " = \[0-9\]+" "test Inferior.pid"
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gdb_test "python print 'result =', i0.was_attached" " = False" "test Inferior.was_attached"
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gdb_test "python print i0.threads ()" "\\(<gdb.InferiorThread object at 0x\[\[:xdigit:\]\]+>,\\)" "test Inferior.threads"
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# Test memory read and write operations.
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gdb_py_test_silent_cmd "python addr = gdb.selected_frame ().read_var ('str')" \
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"read str address" 0
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gdb_py_test_silent_cmd "python str = gdb.inferiors()\[0\].read_memory (addr, 5)" \
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"read str contents" 1
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gdb_py_test_silent_cmd "python str\[1\] = 'a'" "change str" 0
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gdb_py_test_silent_cmd "python gdb.inferiors()\[0\].write_memory (addr, str)" \
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"write str" 1
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gdb_test "print str" " = \"hallo, testsuite\"" \
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"ensure str was changed in the inferior"
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# Test memory search.
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set hex_number {0x[0-9a-fA-F][0-9a-fA-F]*}
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set dec_number {[0-9]+}
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set history_prefix {[$][0-9]* = }
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set newline {[\r\n]+}
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set pattern_not_found "${newline}.None"
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set one_pattern_found "${newline}.${dec_number}"
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# Test string pattern.
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gdb_test "set *(int32_t*) &int8_search_buf\[10\] = 0x61616161" "" ""
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gdb_test "py search_buf = gdb.selected_frame ().read_var ('int8_search_buf')" "" ""
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gdb_test_no_output "py start_addr = search_buf.address"
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gdb_test_no_output "py length = search_buf.type.sizeof"
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gdb_test "py print gdb.inferiors()\[0\].search_memory (start_addr, length, 'aaa')" \
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"${one_pattern_found}" "find string pattern"
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# Test not finding pattern because search range too small, with
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# potential find at the edge of the range.
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gdb_test "py print gdb.inferiors()\[0\].search_memory (start_addr, 10+3, 'aaaa')" \
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"${pattern_not_found}" "pattern not found at end of range"
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# Increase the search range by 1 and we should find the pattern.
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gdb_test "py print gdb.inferiors()\[0\].search_memory (start_addr, 10+3+1, 'aaa')" \
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"${one_pattern_found}" "pattern found at end of range"
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# Import struct to pack the following patterns.
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gdb_test_no_output "py from struct import *"
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# Test 16-bit pattern.
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gdb_test_no_output "set int16_search_buf\[10\] = 0x1234"
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gdb_test_no_output "py search_buf = gdb.selected_frame ().read_var ('int16_search_buf')"
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gdb_test_no_output "py start_addr = search_buf.address"
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gdb_test_no_output "py length = search_buf.type.sizeof"
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gdb_test_no_output "py pattern = pack('${python_pack_char}H',0x1234)"
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gdb_test "py print gdb.inferiors()\[0\].search_memory (start_addr, length, pattern)" \
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"${one_pattern_found}" "find 16-bit pattern, with value pattern"
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# Test 32-bit pattern.
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gdb_test_no_output "set int32_search_buf\[10\] = 0x12345678"
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gdb_test_no_output "py search_buf = gdb.selected_frame ().read_var ('int32_search_buf')"
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gdb_test_no_output "py start_addr = search_buf.address"
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gdb_test_no_output "py length = search_buf.type.sizeof"
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gdb_test_no_output "py pattern = pack('${python_pack_char}I',0x12345678)"
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gdb_test "py print gdb.inferiors()\[0\].search_memory (start_addr, length, pattern)" \
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"${one_pattern_found}" "find 32-bit pattern, with python pattern"
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# Test 64-bit pattern.
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gdb_test_no_output "set int64_search_buf\[10\] = 0xfedcba9876543210LL"
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gdb_test_no_output "py search_buf = gdb.selected_frame ().read_var ('int64_search_buf')"
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gdb_test_no_output "py start_addr = search_buf.address"
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gdb_test_no_output "py length = search_buf.type.sizeof"
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gdb_test_no_output "py pattern = pack('${python_pack_char}Q', 0xfedcba9876543210)"
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gdb_test "py print gdb.inferiors()\[0\].search_memory (start_addr, length, pattern)" \
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"${one_pattern_found}" "find 64-bit pattern, with value pattern"
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# Test mixed-sized patterns.
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gdb_test_no_output "set *(int8_t*) &search_buf\[10\] = 0x62"
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gdb_test_no_output "set *(int16_t*) &search_buf\[11\] = 0x6363"
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gdb_test_no_output "set *(int32_t*) &search_buf\[13\] = 0x64646464"
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gdb_test_no_output "py search_buf = gdb.selected_frame ().read_var ('search_buf')"
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gdb_test_no_output "py start_addr = search_buf\[0\].address"
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gdb_test_no_output "py pattern1 = pack('B', 0x62)"
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gdb_test_no_output "py pattern2 = pack('${python_pack_char}H', 0x6363)"
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gdb_test_no_output "py pattern3 = pack('${python_pack_char}I', 0x64646464)"
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gdb_test "py print gdb.inferiors()\[0\].search_memory (start_addr, 100, pattern1)" \
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"${one_pattern_found}" "find mixed-sized pattern"
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gdb_test "py print gdb.inferiors()\[0\].search_memory (start_addr, 100, pattern2)" \
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"${one_pattern_found}" "find mixed-sized pattern"
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gdb_test "py print gdb.inferiors()\[0\].search_memory (start_addr, 100, pattern3)" \
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"${one_pattern_found}" "find mixed-sized pattern"
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# Test search spanning a large range, in the particular case of native
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# targets, test the search spanning multiple chunks.
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# Remote targets may implement the search differently.
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set CHUNK_SIZE 16000 ;
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gdb_test_no_output "set *(int32_t*) &search_buf\[0*${CHUNK_SIZE}+100\] = 0x12345678"
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gdb_test_no_output "set *(int32_t*) &search_buf\[1*${CHUNK_SIZE}+100\] = 0x12345678"
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gdb_test_no_output "py start_addr = gdb.selected_frame ().read_var ('search_buf')"
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gdb_test_no_output "py end_addr = start_addr + gdb.selected_frame ().read_var ('search_buf_size')"
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gdb_test_no_output "py pattern = pack('${python_pack_char}I', 0x12345678)"
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gdb_test_no_output "py first = gdb.inferiors()\[0\].search_memory (start_addr,end_addr - start_addr, pattern)"
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gdb_test "py print first" "${one_pattern_found}" "search spanning large range 1st result"
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gdb_test_no_output "py start_addr = first + 1"
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gdb_test_no_output "py second = gdb.inferiors()\[0\].search_memory (start_addr, end_addr - start_addr, pattern)"
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gdb_test "py print second" "${one_pattern_found}" "search spanning large range 2nd result"
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gdb_test_no_output "py start_addr = second + 1"
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gdb_test_no_output "py third = gdb.inferiors()\[0\].search_memory (start_addr, end_addr - start_addr, pattern)"
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gdb_test "py print third" "${pattern_not_found}" "search spanning large range 3rd result"
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# For native targets, test a pattern straddling a chunk boundary.
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if [isnative] {
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gdb_test_no_output "set *(int32_t*) &search_buf\[${CHUNK_SIZE}-1\] = 0xfdb97531"
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gdb_test_no_output "py pattern = pack('${python_pack_char}I', 0xfdb97531)"
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gdb_test_no_output "py start_addr = gdb.selected_frame ().read_var ('search_buf')"
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gdb_test "py print gdb.inferiors()\[0\].search_memory (start_addr, end_addr - start_addr, pattern)" \
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"${one_pattern_found}" "find pattern straddling chunk boundary"
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}
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# Test Inferior is_valid. This must always be the last test in
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# this testcase as it kills the inferior.
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gdb_py_test_silent_cmd "python inf_list = gdb.inferiors()" "get initial list" 1
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gdb_test "python print len(inf_list)" "1" "Get inferior list length"
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gdb_test "python print inf_list\[0\].is_valid()" "True" \
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"Check inferior validity"
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gdb_test "add-inferior" "Added inferior 2.*" "add empty inferior 2"
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gdb_py_test_silent_cmd "python inf_list = gdb.inferiors()" "get new list" 1
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gdb_test "python print len(inf_list)" "2" "Get inferior list length"
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gdb_test "python print inf_list\[0\].is_valid()" "True" \
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"Check inferior validity"
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gdb_test "python print inf_list\[1\].is_valid()" "True" \
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"Check inferior validity"
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gdb_test_no_output "remove-inferiors 2" "remove-inferiors 2"
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gdb_test "python print inf_list\[0\].is_valid()" "False" \
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"Check inferior validity"
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gdb_test "python print inf_list\[1\].is_valid()" "True" \
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"Check inferior validity"
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