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[gdb/testsuite] Fix timeouts in gdb.threads/step-over-thread-exit.exp

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Once in a while, I run into a timeout in test-case
gdb.threads/step-over-thread-exit.exp:
...
(gdb) continue^M
Continuing.^M
[New Thread 0xfffff7cff1a0 (LWP 2874854)]^M
^M
Thread 97 "step-over-threa" hit Breakpoint 2, 0x0000000000410314 in \
  my_exit_syscall () at gdb/testsuite/lib/my-syscalls.S:74^M
74      SYSCALL (my_exit, __NR_exit)^M
(gdb) [Thread 0xfffff7cff1a0 (LWP 2874853) exited]^M
FAIL: $exp: step_over_mode=displaced: non-stop=on: target-non-stop=on: \
  schedlock=off: cmd=continue: ns_stop_all=0: iter 95: continue (timeout)
...

I can reproduce it more frequently by running with taskset -c <slow core id>.

Fix this by using -no-prompt-anchor.

This requires us to add -no-prompt-anchor to proc gdb_test_multiple.

Tested on aarch64-linux.

PR testsuite/32489
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=32489
This commit is contained in:
Tom de Vries 2025-01-16 09:39:55 +01:00
parent a3735a6e3d
commit ca263aec20
2 changed files with 11 additions and 3 deletions
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5
gdb/testsuite/gdb.threads/step-over-thread-exit.exp
View File

@ -193,7 +193,7 @@ proc test {step_over_mode non-stop target-non-stop schedlock cmd ns_stop_all} {
with_test_prefix "iter $i" {
set ok 0
set thread "<unknown>"
gdb_test_multiple "continue" "" {
gdb_test_multiple "continue" "" -no-prompt-anchor {
-re -wrap "Thread ($::decimal) .*hit Breakpoint $::decimal.* my_exit_syscall .*" {
set thread $expect_out(1,string)
set ok 1
@ -206,7 +206,8 @@ proc test {step_over_mode non-stop target-non-stop schedlock cmd ns_stop_all} {
}
if {${non-stop}} {
gdb_test -nopass "thread $thread" "Switching to thread .*" \
gdb_test -nopass -no-prompt-anchor "thread $thread" \
"Switching to thread .*" \
"switch to event thread"
}
}

9
gdb/testsuite/lib/gdb.exp
View File

@ -1022,6 +1022,10 @@ proc command_to_message { command } {
# if one of them matches. If MESSAGE is empty COMMAND will be used.
# -prompt PROMPT_REGEXP specifies a regexp matching the expected prompt
# after the command output. If empty, defaults to "$gdb_prompt $".
# -no-prompt-anchor specifies that if the default prompt regexp is used, it
# should not be anchored at the end of the buffer. This means that the
# pattern can match even if there is stuff output after the prompt. Does not
# have any effect if -prompt is specified.
# -lbl specifies that line-by-line matching will be used.
# EXPECT_ARGUMENTS will be fed to expect in addition to the standard
# patterns. Pattern elements will be evaluated in the caller's
@ -1121,6 +1125,7 @@ proc gdb_test_multiple { command message args } {
set line_by_line 0
set prompt_regexp ""
set prompt_anchor 1
for {set i 0} {$i < [llength $args]} {incr i} {
set arg [lindex $args $i]
if { $arg == "-prompt" } {
@ -1128,6 +1133,8 @@ proc gdb_test_multiple { command message args } {
set prompt_regexp [lindex $args $i]
} elseif { $arg == "-lbl" } {
set line_by_line 1
} elseif { $arg == "-no-prompt-anchor" } {
set prompt_anchor 0
} else {
set user_code $arg
break
@ -1139,7 +1146,7 @@ proc gdb_test_multiple { command message args } {
error "Too few arguments to gdb_test_multiple"
}
set prompt_regexp [fill_in_default_prompt $prompt_regexp true]
set prompt_regexp [fill_in_default_prompt $prompt_regexp $prompt_anchor]
if { $message == "" } {
set message [command_to_message $command]