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# Copyright 2020-2024 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/>.
# Test loading two inferiors into GDB, and running one of them twice
# in a row. GDB used to have a bug that made it so that after an
# inferior exit, the current program space was left pointing to the
# wrong inferior's pspace, causing subsequent symbol lookups to
# misbehave, including failing to load libthread_db.so. See PR
# gdb/25410.
# Build two executables, with different symbols.
set exec1 "multi-re-run-1"
set srcfile1 multi-re-run-1.c
set binfile1 [standard_output_file ${exec1}]
set exec2 "multi-re-run-2"
set srcfile2 multi-re-run-2.c
set binfile2 [standard_output_file ${exec2}]
with_test_prefix "exec1" {
if { [build_executable "failed to prepare" ${exec1} "${srcfile1}" \
[list pthreads debug]] } {
return -1
}
}
with_test_prefix "exec2" {
if { [build_executable "failed to prepare" ${exec2} "${srcfile2}" \
[list pthreads debug]] } {
return -1
}
}
# Start two inferiors, leave one stopped, and run the other a couple
# times. RE_RUN_INF is the inferior that is re-run.
proc test_re_run {re_run_inf} {
global binfile1 binfile2
global inferior_exited_re
global gdb_prompt
global last_loaded_file
clean_restart ${binfile1}
delete_breakpoints
# Start another inferior.
gdb_test "add-inferior" "Added inferior 2.*" \
"add empty inferior 2"
gdb_test "inferior 2" "Switching to inferior 2.*" \
"switch to inferior 2"
gdb_load ${binfile2}
if {$re_run_inf == 1} {
set steady_inf 2
set steady_binfile $binfile2
set re_run_binfile $binfile1
} else {
set steady_inf 1
set steady_binfile $binfile1
set re_run_binfile $binfile2
}
gdb_test "inferior $steady_inf" "Switching to inferior $steady_inf.*" \
"switch to steady inferior"
set last_loaded_file $steady_binfile
# Run the steady inferior to a breakpoint, and let it stay stopped
# there.
if {![runto all_started]} {
return 0
}
gdb_test "inferior $re_run_inf" "Switching to inferior $re_run_inf.*" \
"switch to re-run inferior"
set last_loaded_file $re_run_binfile
# Now run the RE_RUN_INF inferior a couple times. GDB used to
# have a bug that caused the second run to fail to load
# libthread_db.so.
foreach_with_prefix iter {1 2} {
delete_breakpoints
if ![runto all_started] {
return 0
}
# If a thread_stratum target fails to load, then TLS debugging
# fails too.
gdb_test "print tls_var" " = 1"
gdb_continue_to_end "" continue 1
# In the original bug, after an inferior exit, GDB would leave
# the current program space pointing to the wrong inferior's
# pspace, and thus the wrong symbols were visible.
if {$re_run_inf == 1} {
gdb_test "print re_run_var_1" " = 1"
} else {
gdb_test "print re_run_var_2" " = 2"
}
}
}
# For completeness, test re-running either inferior 1 or inferior 2.
foreach_with_prefix re_run_inf {1 2} {
test_re_run $re_run_inf
}
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