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# Copyright (C) 2022 Free Software Foundation, Inc.
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# This file is part of the GDB testsuite. It tests a pretty printer that
# calls an inferior function by hand, triggering a Use-after-Free bug
# (PR gdb/28856).
load_lib gdb-python.exp
standard_testfile
# gdb needs to be started here for skip_python_tests to work.
# prepare_for_testing could be used instead, but it could compile the program
# unnecessarily, so starting GDB like this is preferable.
gdb_start
# Skip all tests if Python scripting is not enabled.
if { [skip_python_tests] } { continue }
if { [prepare_for_testing "failed to prepare" $testfile $srcfile debug] } {
untested "failed to compile"
return -1
}
# This proc restarts GDB, makes the inferior reach the desired spot - marked
# by a comment in the .c file - and turns on the pretty printer for testing.
# Starting with a new GDB is important because the test may crash GDB. The
# return values are here to avoid us trying to test the pretty printer if
# there was a problem getting to main.
proc start_test { breakpoint_comment } {
global srcdir subdir testfile binfile
# Start with a fresh gdb.
# This is important because the test can crash GDB.
clean_restart ${binfile}
if {![runto_main]} {
untested "couldn't run to breakpoint"
return -1
}
# Let GDB get to the return line.
gdb_breakpoint [gdb_get_line_number ${breakpoint_comment} ${testfile}.c ]
gdb_continue_to_breakpoint ${breakpoint_comment} ".*"
gdb_test_no_output "set print pretty on" "starting to pretty print"
set remote_python_file [gdb_remote_download host ${srcdir}/${subdir}/${testfile}.py]
gdb_test_no_output "source ${remote_python_file}" "load python file"
return 0
}
# Start by testing the "run" command, it can't leverage start_test
with_test_prefix "run to frame" {
if {![runto_main]} {
untested "couldn't run to main"
}
gdb_test_no_output "set print pretty on" "starting to pretty print"
set remote_python_file [gdb_remote_download host ${srcdir}/${subdir}/${testfile}.py]
gdb_test_no_output "source ${remote_python_file}" "load python file"
gdb_breakpoint [gdb_get_line_number "TAG: final frame" ${testfile}.c]
gdb_continue_to_breakpoint "TAG: final frame" ".*"
}
# Testing the backtrace command.
with_test_prefix "frame print" {
if { [start_test "TAG: final frame"] == 0 } {
gdb_test "backtrace -frame-arguments all" [multi_line \
"#0 .*g \\(mt=mytype is .*\\, depth=0\\).*"\
"#1 .*g \\(mt=mytype is .*\\, depth=1\\).*"\
"#2 .*g \\(mt=mytype is .*\\, depth=2\\).*"\
"#3 .*g \\(mt=mytype is .*\\, depth=3\\).*"\
"#4 .*g \\(mt=mytype is .*\\, depth=4\\).*"\
"#5 .*g \\(mt=mytype is .*\\, depth=5\\).*"\
"#6 .*g \\(mt=mytype is .*\\, depth=6\\).*"\
"#7 .*g \\(mt=mytype is .*\\, depth=7\\).*"\
"#8 .*g \\(mt=mytype is .*\\, depth=8\\).*"\
"#9 .*g \\(mt=mytype is .*\\, depth=9\\).*"\
"#10 .*g \\(mt=mytype is .*\\, depth=10\\).*"\
"#11 .*main \\(\\).*"] \
"backtrace test"
}
}
# Test the "info frame" command
with_test_prefix "info frame" {
if { [start_test "TAG: first frame"] == 0 } {
gdb_test "info frame" "mytype is $hex \"hello world\".*"
}
}
# Testing the down command.
with_test_prefix "frame movement down" {
if { [start_test "TAG: first frame"] == 0 } {
gdb_test "up" [multi_line "#1 .*in main \\(\\) at .*" ".*outside the frame.*"]
gdb_test "down" [multi_line "#0\\s+g \\(mt=mytype is .*\\, depth=10\\).*" ".*first frame.*"]
}
}
# Testing the up command.
with_test_prefix "frame movement up" {
if { [start_test "TAG: final frame"] == 0 } {
gdb_test "up" [multi_line "#1 .*in g \\(mt=mytype is .*\\, depth=1\\).*" ".*first frame.*"]
}
}
# Testing the finish command.
with_test_prefix "frame exit through finish" {
if { [start_test "TAG: final frame"] == 0 } {
gdb_test "finish" [multi_line ".*.*g \\(mt=mytype is .*\\, depth=0\\).*" ".*g \\(mt=mytype is .*\\, depth=1\\).*" ".*"]
}
}
# Testing the step command.
with_test_prefix "frame enter through step" {
if { [start_test "TAG: outside the frame"] == 0 } {
gdb_test "step" [multi_line "g \\(mt=mytype is .*\\, depth=10\\).*" "41.*if \\(depth \\<= 0\\)"]
}
}
# Testing the continue command.
with_test_prefix "frame enter through continue" {
if { [start_test "TAG: outside the frame"] == 0 } {
gdb_breakpoint [gdb_get_line_number "TAG: first frame" ${testfile}.c ]
gdb_continue_to_breakpoint "TAG: first frame" ".*TAG: first frame.*"
}
}
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