mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-27 04:52:05 +08:00
92 lines
2.9 KiB
Plaintext
92 lines
2.9 KiB
Plaintext
# Copyright (C) 2014-2018 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/>.
|
|
|
|
# On decr_pc_after_break targets, GDB used to adjust the PC
|
|
# incorrectly if a background single-step stopped somewhere where
|
|
# PC-$decr_pc had a breakpoint, and the thread was not the current
|
|
# thread, like:
|
|
#
|
|
# ADDR1 nop <-- breakpoint here
|
|
# ADDR2 jmp PC
|
|
#
|
|
# IOW, say thread A is stepping ADDR2's line in the background (an
|
|
# infinite loop), and the user switches focus to thread B. GDB's
|
|
# adjust_pc_after_break logic would confuse the single-step stop of
|
|
# thread A for a hit of the breakpoint at ADDR1, and thus adjust
|
|
# thread A's PC to point at ADDR1 when it should not: the thread had
|
|
# been single-stepped, not continued.
|
|
|
|
standard_testfile
|
|
|
|
if {[prepare_for_testing "failed to prepare" $testfile $srcfile {debug pthreads}] == -1} {
|
|
return -1
|
|
}
|
|
|
|
clean_restart $binfile
|
|
|
|
if ![runto_main] {
|
|
continue
|
|
}
|
|
|
|
# Make sure it's GDB's decr_pc logic that's being tested, not the
|
|
# target's.
|
|
gdb_test_no_output "set range-stepping off"
|
|
|
|
delete_breakpoints
|
|
|
|
gdb_breakpoint [gdb_get_line_number "set breakpoint here"]
|
|
gdb_continue_to_breakpoint "run to nop breakpoint"
|
|
gdb_test "info threads" " 1 .*\\\* 2 .*" "info threads shows all threads"
|
|
|
|
gdb_test "next" "while.*" "next over nop"
|
|
|
|
gdb_test_no_output "next&" "next& over inf loop"
|
|
|
|
set test "switch to main thread"
|
|
gdb_test_multiple "thread 1" $test {
|
|
-re "Cannot execute this command while the target is running.*$gdb_prompt $" {
|
|
unsupported $test
|
|
|
|
# With remote targets, we can't send any other remote packet
|
|
# until the target stops. Switching thread wants to ask the
|
|
# remote side whether the thread is alive.
|
|
return
|
|
}
|
|
-re "Switching to thread 1.*\\(running\\)\r\n$gdb_prompt " {
|
|
# Prefer to match the prompt without an anchor. If there's a
|
|
# bug and output comes after the prompt immediately, it's
|
|
# faster to handle that in the following test, instead of
|
|
# waiting for a timeout here.
|
|
pass $test
|
|
}
|
|
}
|
|
|
|
# Wait a bit. Use gdb_expect instead of sleep so that any (bad) GDB
|
|
# output is visible in the log.
|
|
gdb_expect 4 {}
|
|
|
|
set test "no output while stepping"
|
|
gdb_test_multiple "" $test {
|
|
-timeout 1
|
|
timeout {
|
|
pass $test
|
|
}
|
|
-re "." {
|
|
# If we see any output, it's a failure. On the original bug,
|
|
# this would be a breakpoint hit.
|
|
fail $test
|
|
}
|
|
}
|