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# Copyright 2023-2024 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/>.
# GDB expected PC should point right after the SVC instruction when the
# syscall is active. But some active syscalls keep PC pointing to the SVC
# instruction itself.
# Require an architecture with the SVC instruction.
require {is_any_target "aarch64*-*-*" "arm*-*-*"}
# See if we have target board readnow.exp or similar. We're using
# --readnever, which is not allowed in combination with --readnow.
require !readnow
standard_testfile
if { [build_executable "failed to prepare" ${testfile} ${srcfile} \
{debug pthreads}] } {
return
}
save_vars { GDBFLAGS } {
append GDBFLAGS " --readnever"
if { [clean_restart ${binfile}] == -1 } {
return -1
}
}
if { ![runto_main] } {
return
}
gdb_test "advance breakhere" " in breakhere .*"
gdb_test "thread 2" "Switching to thread 2 .*" "thread 2 for svc check"
# GDB expected PC should point right after the SVC instruction when the syscall is active.
# But some active syscalls keep PC pointing to the SVC instruction itself.
set test "pc points to svc"
gdb_test_multiple {x/i $pc} $test {
-re ":\tsvc\t(0x00000000|0)\r\n$gdb_prompt $" {
pass $test
}
-re "\r\n$gdb_prompt $" {
untested $test
return
}
}
gdb_test "thread 1" "Switching to thread 1 .*"
gdb_test_no_output "set debug frame 1"
# PASS:
# [frame] frame_unwind_try_unwinder: trying unwinder "arm exidx"
# [frame] frame_unwind_register_value: enter
#...
# [frame] frame_unwind_register_value: exit
# [frame] frame_unwind_try_unwinder: yes
#...
# [frame] get_prev_frame_always_1: -> {level=0,type=NORMAL_FRAME,unwinder="arm exidx",pc=0xb6f8681c,id=<not computed>,func=<unknown>} // cached
# FAIL:
# [frame] frame_unwind_try_unwinder: trying unwinder "arm exidx"
# [frame] frame_unwind_register_value: enter
#...
# [frame] frame_unwind_register_value: exit
# [frame] frame_unwind_try_unwinder: no
# [frame] frame_unwind_try_unwinder: trying unwinder "arm epilogue"
# [frame] frame_unwind_register_value: enter
#...
# [frame] frame_unwind_register_value: exit
# [frame] frame_unwind_try_unwinder: no
# [frame] frame_unwind_try_unwinder: trying unwinder "arm prologue"
# [frame] frame_unwind_try_unwinder: yes
#...
# [frame] get_prev_frame_always_1: -> {level=0,type=NORMAL_FRAME,unwinder="arm prologue",pc=0xb6f8681c,id=<not computed>,func=<unknown>} // cached
set test "unwinder is arm exidx"
# Switch the threads to reset frame cache.
gdb_test_multiple {thread 2} $test {
-re "\{level=0,type=NORMAL_FRAME,unwinder=\"arm exidx\",pc=.*\r\n$gdb_prompt $" {
pass $test
}
-re "\{level=0,type=NORMAL_FRAME,unwinder=\"arm prologue\",pc=.*\r\n$gdb_prompt $" {
fail $test
}
-re "\r\n$gdb_prompt $" {
untested $test
return
}
}
gdb_test "thread 2" "Switching to thread 2 .*" "thread 2 for debug frame check"
gdb_test_no_output "set debug frame 0"
# PASS:
# #0 0xb6f8681c in pthread_cond_timedwait@@GLIBC_2.4 () from /lib/arm-linux-gnueabihf/libpthread.so.0
# #1 0x00010648 in fun (arg=0x0) at .../gdb/testsuite/gdb.arch/arm-pthread_cond_timedwait-bt.c:38
# ...
# FAIL:
# #0 0xb6f8681c in pthread_cond_timedwait@@GLIBC_2.4 () from /lib/arm-linux-gnueabihf/libpthread.so.0
# #1 0xb6e21f80 in ?? ()
# Backtrace stopped: previous frame identical to this frame (corrupt stack?)
gdb_test "bt" { in fun \(\).*} "unwind of pthread_cond_timedwait"
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