This commit adds a new $_gthread convenience variable, that is like
$_thread, but holds the current thread's global thread id.
gdb/ChangeLog:
2016-01-13 Pedro Alves <palves@redhat.com>
* NEWS: Mention $_gthread.
* gdbthread.h (struct thread_info) <global_num>: Mention
$_gthread.
* thread.c (thread_num_make_value_helper): New function.
(thread_id_make_value): Delete.
(thread_id_per_inf_num_make_value, global_thread_id_make_value):
New.
(thread_funcs): Adjust.
(gthread_funcs): New.
(_initialize_thread): Register $_gthread variable.
gdb/testsuite/ChangeLog:
2016-01-13 Pedro Alves <palves@redhat.com>
* gdb.base/default.exp: Expect $_gthread as well.
* gdb.multi/tids.exp: Test $_gthread.
* gdb.threads/thread-specific.exp: Test $_gthread.
gdb/doc/ChangeLog:
2016-01-13 Pedro Alves <palves@redhat.com>
* gdb.texinfo (Threads): Document the $_gthread convenience
variable.
(Convenience Vars): Likewise.
This commit changes GDB to track thread numbers per-inferior. Then,
if you're debugging multiple inferiors, GDB displays
"inferior-num.thread-num" instead of just "thread-num" whenever it
needs to display a thread:
(gdb) info inferiors
Num Description Executable
1 process 6022 /home/pedro/gdb/tests/threads
* 2 process 6037 /home/pedro/gdb/tests/threads
(gdb) info threads
Id Target Id Frame
1.1 Thread 0x7ffff7fc2740 (LWP 6022) "threads" (running)
1.2 Thread 0x7ffff77c0700 (LWP 6028) "threads" (running)
1.3 Thread 0x7ffff7fc2740 (LWP 6032) "threads" (running)
2.1 Thread 0x7ffff7fc1700 (LWP 6037) "threads" (running)
2.2 Thread 0x7ffff77c0700 (LWP 6038) "threads" (running)
* 2.3 Thread 0x7ffff7fc2740 (LWP 6039) "threads" (running)
(gdb)
...
(gdb) thread 1.1
[Switching to thread 1.1 (Thread 0x7ffff7fc2740 (LWP 8155))]
(gdb)
...
etc.
You can still use "thread NUM", in which case GDB infers you're
referring to thread NUM of the current inferior.
The $_thread convenience var and Python's InferiorThread.num attribute
are remapped to the new per-inferior thread number. It's a backward
compatibility break, but since it only matters when debugging multiple
inferiors, I think it's worth doing.
Because MI thread IDs need to be a single integer, we keep giving
threads a global identifier, _in addition_ to the per-inferior number,
and make MI always refer to the global thread IDs. IOW, nothing
changes from a MI frontend's perspective.
Similarly, since Python's Breakpoint.thread and Guile's
breakpoint-thread/set-breakpoint-thread breakpoint methods need to
work with integers, those are adjusted to work with global thread IDs
too. Follow up patches will provide convenient means to access
threads' global IDs.
To avoid potencially confusing users (which also avoids updating much
of the testsuite), if there's only one inferior and its ID is "1",
IOW, the user hasn't done anything multi-process/inferior related,
then the "INF." part of thread IDs is not shown. E.g,.:
(gdb) info inferiors
Num Description Executable
* 1 process 15275 /home/pedro/gdb/tests/threads
(gdb) info threads
Id Target Id Frame
* 1 Thread 0x7ffff7fc1740 (LWP 15275) "threads" main () at threads.c:40
(gdb) add-inferior
Added inferior 2
(gdb) info threads
Id Target Id Frame
* 1.1 Thread 0x7ffff7fc1740 (LWP 15275) "threads" main () at threads.c:40
(gdb)
No regressions on x86_64 Fedora 20.
gdb/ChangeLog:
2016-01-13 Pedro Alves <palves@redhat.com>
* NEWS: Mention that thread IDs are now per inferior and global
thread IDs.
* Makefile.in (SFILES): Add tid-parse.c.
(COMMON_OBS): Add tid-parse.o.
(HFILES_NO_SRCDIR): Add tid-parse.h.
* ada-tasks.c: Adjust to use ptid_to_global_thread_id.
* breakpoint.c (insert_breakpoint_locations)
(remove_threaded_breakpoints, bpstat_check_breakpoint_conditions)
(print_one_breakpoint_location, set_longjmp_breakpoint)
(check_longjmp_breakpoint_for_call_dummy)
(set_momentary_breakpoint): Adjust to use global IDs.
(find_condition_and_thread, watch_command_1): Use parse_thread_id.
(until_break_command, longjmp_bkpt_dtor)
(breakpoint_re_set_thread, insert_single_step_breakpoint): Adjust
to use global IDs.
* dummy-frame.c (pop_dummy_frame_bpt): Adjust to use
ptid_to_global_thread_id.
* elfread.c (elf_gnu_ifunc_resolver_stop): Likewise.
* gdbthread.h (struct thread_info): Rename field 'num' to
'global_num. Add new fields 'per_inf_num' and 'inf'.
(thread_id_to_pid): Rename thread_id_to_pid to
global_thread_id_to_ptid.
(pid_to_thread_id): Rename to ...
(ptid_to_global_thread_id): ... this.
(valid_thread_id): Rename to ...
(valid_global_thread_id): ... this.
(find_thread_id): Rename to ...
(find_thread_global_id): ... this.
(ALL_THREADS, ALL_THREADS_BY_INFERIOR): Declare.
(print_thread_info): Add comment.
* tid-parse.h: New file.
* tid-parse.c: New file.
* infcmd.c (step_command_fsm_prepare)
(step_command_fsm_should_stop): Adjust to use the global thread
ID.
(until_next_command, until_next_command)
(finish_command_fsm_should_stop): Adjust to use the global thread
ID.
(attach_post_wait): Adjust to check the inferior number too.
* inferior.h (struct inferior) <highest_thread_num>: New field.
* infrun.c (handle_signal_stop)
(insert_exception_resume_breakpoint)
(insert_exception_resume_from_probe): Adjust to use the global
thread ID.
* record-btrace.c (record_btrace_open): Use global thread IDs.
* remote.c (process_initial_stop_replies): Also consider the
inferior number.
* target.c (target_pre_inferior): Clear the inferior's highest
thread num.
* thread.c (clear_thread_inferior_resources): Adjust to use the
global thread ID.
(new_thread): New inferior parameter. Adjust to use it. Set both
the thread's global ID and the thread's per-inferior ID.
(add_thread_silent): Adjust.
(find_thread_global_id): New.
(find_thread_id): Make static. Adjust to rename.
(valid_thread_id): Rename to ...
(valid_global_thread_id): ... this.
(pid_to_thread_id): Rename to ...
(ptid_to_global_thread_id): ... this.
(thread_id_to_pid): Rename to ...
(global_thread_id_to_ptid): ... this. Adjust.
(first_thread_of_process): Adjust.
(do_captured_list_thread_ids): Adjust to use global thread IDs.
(should_print_thread): New function.
(print_thread_info): Rename to ...
(print_thread_info_1): ... this, and add new show_global_ids
parameter. Handle it. Iterate over inferiors.
(print_thread_info): Reimplement as wrapper around
print_thread_info_1.
(show_inferior_qualified_tids): New function.
(print_thread_id): Use it.
(tp_array_compar): Compare inferior numbers too.
(thread_apply_command): Use tid_range_parser.
(do_captured_thread_select): Use parse_thread_id.
(thread_id_make_value): Adjust.
(_initialize_thread): Adjust "info threads" help string.
* varobj.c (struct varobj_root): Update comment.
(varobj_create): Adjust to use global thread IDs.
(value_of_root_1): Adjust to use global_thread_id_to_ptid.
* windows-tdep.c (display_tib): No longer accept an argument.
* cli/cli-utils.c (get_number_trailer): Make extern.
* cli/cli-utils.h (get_number_trailer): Declare.
(get_number_const): Adjust documentation.
* mi/mi-cmd-var.c (mi_cmd_var_update_iter): Adjust to use global
thread IDs.
* mi/mi-interp.c (mi_new_thread, mi_thread_exit)
(mi_on_normal_stop, mi_output_running_pid, mi_on_resume):
* mi/mi-main.c (mi_execute_command, mi_cmd_execute): Likewise.
* guile/scm-breakpoint.c (gdbscm_set_breakpoint_thread_x):
Likewise.
* python/py-breakpoint.c (bppy_set_thread): Likewise.
* python/py-finishbreakpoint.c (bpfinishpy_init): Likewise.
* python/py-infthread.c (thpy_get_num): Add comment and return the
per-inferior thread ID.
(thread_object_getset): Update comment of "num".
gdb/testsuite/ChangeLog:
2016-01-07 Pedro Alves <palves@redhat.com>
* gdb.base/break.exp: Adjust to output changes.
* gdb.base/hbreak2.exp: Likewise.
* gdb.base/sepdebug.exp: Likewise.
* gdb.base/watch_thread_num.exp: Likewise.
* gdb.linespec/keywords.exp: Likewise.
* gdb.multi/info-threads.exp: Likewise.
* gdb.threads/thread-find.exp: Likewise.
* gdb.multi/tids.c: New file.
* gdb.multi/tids.exp: New file.
gdb/doc/ChangeLog:
2016-01-07 Pedro Alves <palves@redhat.com>
* gdb.texinfo (Threads): Document per-inferior thread IDs,
qualified thread IDs, global thread IDs and thread ID lists.
(Set Watchpoints, Thread-Specific Breakpoints): Adjust to refer to
thread IDs.
(Convenience Vars): Document the $_thread convenience variable.
(Ada Tasks): Adjust to refer to thread IDs.
(GDB/MI Async Records, GDB/MI Thread Commands, GDB/MI Ada Tasking
Commands, GDB/MI Variable Objects): Update to mention global
thread IDs.
* guile.texi (Breakpoints In Guile)
<breakpoint-thread/set-breakpoint-thread breakpoint>: Mention
global thread IDs instead of thread IDs.
* python.texi (Threads In Python): Adjust documentation of
InferiorThread.num.
(Breakpoint.thread): Mention global thread IDs instead of thread
IDs.
This commit merges both the registers and $_siginfo "thread
running/executing" checks into a single function.
Accessing $_siginfo from a "catch signal" breakpoint condition doesn't
work. The condition always fails with "Selected thread is running":
(gdb) catch signal
Catchpoint 3 (standard signals)
(gdb)
condition $bpnum $_siginfo.si_signo == 5
(gdb) continue
Continuing.
Error in testing breakpoint condition:
Selected thread is running.
Catchpoint 3 (signal SIGUSR1), 0x0000003615e35877 in __GI_raise (sig=10) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
56 return INLINE_SYSCALL (tgkill, 3, pid, selftid, sig);
(gdb)
When accessing the $_siginfo object, we check whether the thread is
marked running (external/public) state and refuse the access if so.
This is so "print $_siginfo" at the prompt fails nicelly when the
current thread is running. While evaluating breakpoint conditionals,
we haven't decided yet whether the thread is going to stop, so
is_running still returns true, and we thus always error out.
Evaluating an expression that requires registers access is really
conceptually the same -- we could think of $_siginfo as a pseudo
register. However, in that case we check whether the thread is marked
executing (internal/private state), not running (external/public
state). Changing the $_siginfo validation to check is_executing as
well fixes the bug in question.
Note that checking is_executing is not fully correct, not even for
registers. See PR 19389. However, I think this is the lesser of two
evils and ends up as an improvement. We at least now have a single
place to fix.
Tested on x86_64 GNU/Linux.
gdb/ChangeLog:
2016-01-13 Pedro Alves <palves@redhat.com>
PR breakpoints/19388
* frame.c (get_current_frame): Use validate_registers_access.
* gdbthread.h (validate_registers_access): Declare.
* infrun.c (validate_siginfo_access): Delete.
(siginfo_value_read, siginfo_value_write): Use
validate_registers_access.
* thread.c (validate_registers_access): New function.
gdb/testsuite/ChangeLog:
2016-01-13 Pedro Alves <palves@redhat.com>
PR breakpoints/19388
* gdb.base/catch-signal-siginfo-cond.c: New file.
* gdb.base/catch-signal-siginfo-cond.exp: New file.
This adds a new QCatchSyscalls packet to enable 'catch syscall', and new
stop reasons "syscall_entry" and "syscall_return" for those events. It
is currently only supported on Linux x86 and x86_64.
gdb/ChangeLog:
2016-01-12 Josh Stone <jistone@redhat.com>
Philippe Waroquiers <philippe.waroquiers@skynet.be>
* NEWS (Changes since GDB 7.10): Mention QCatchSyscalls and the
syscall_entry and syscall_return stop reasons. Mention GDB
support for remote catch syscall.
* remote.c (PACKET_QCatchSyscalls): New enum.
(remote_set_syscall_catchpoint): New function.
(remote_protocol_features): New element for QCatchSyscalls.
(remote_parse_stop_reply): Parse syscall_entry/return stops.
(init_remote_ops): Install remote_set_syscall_catchpoint.
(_initialize_remote): Config QCatchSyscalls.
* linux-nat.h (struct lwp_info) <syscall_state>: Comment typo.
gdb/doc/ChangeLog:
2016-01-12 Josh Stone <jistone@redhat.com>
Philippe Waroquiers <philippe.waroquiers@skynet.be>
* gdb.texinfo (Remote Configuration): List the QCatchSyscalls packet.
(Stop Reply Packets): List the syscall entry and return stop reasons.
(General Query Packets): Describe QCatchSyscalls, and add it to the
table and the detailed list of stub features.
gdb/gdbserver/ChangeLog:
2016-01-12 Josh Stone <jistone@redhat.com>
Philippe Waroquiers <philippe.waroquiers@skynet.be>
* inferiors.h: Include "gdb_vecs.h".
(struct process_info): Add syscalls_to_catch.
* inferiors.c (remove_process): Free syscalls_to_catch.
* remote-utils.c (prepare_resume_reply): Report syscall_entry and
syscall_return stops.
* server.h (UNKNOWN_SYSCALL, ANY_SYSCALL): Define.
* server.c (handle_general_set): Handle QCatchSyscalls.
(handle_query): Report support for QCatchSyscalls.
* target.h (struct target_ops): Add supports_catch_syscall.
(target_supports_catch_syscall): New macro.
* linux-low.h (struct linux_target_ops): Add get_syscall_trapinfo.
(struct lwp_info): Add syscall_state.
* linux-low.c (handle_extended_wait): Mark syscall_state as an entry.
Maintain syscall_state and syscalls_to_catch across exec.
(get_syscall_trapinfo): New function, proxy to the_low_target.
(linux_low_ptrace_options): Enable PTRACE_O_TRACESYSGOOD.
(linux_low_filter_event): Toggle syscall_state entry/return for
syscall traps, and set it ignored for all others.
(gdb_catching_syscalls_p): New function.
(gdb_catch_this_syscall_p): New function.
(linux_wait_1): Handle SYSCALL_SIGTRAP.
(linux_resume_one_lwp_throw): Add PTRACE_SYSCALL possibility.
(linux_supports_catch_syscall): New function.
(linux_target_ops): Install it.
* linux-x86-low.c (x86_get_syscall_trapinfo): New function.
(the_low_target): Install it.
gdb/testsuite/ChangeLog:
2016-01-12 Josh Stone <jistone@redhat.com>
Philippe Waroquiers <philippe.waroquiers@skynet.be>
* gdb.base/catch-syscall.c (do_execve): New variable.
(main): Conditionally trigger an execve.
* gdb.base/catch-syscall.exp: Enable testing for remote targets.
(test_catch_syscall_execve): New, check entry/return across execve.
(do_syscall_tests): Call test_catch_syscall_execve.
This exposes the issued fixed by 2f99e8fc9cb8:
https://sourceware.org/ml/gdb-patches/2015-12/msg00423.html
to native debugging as well.
gdb/testsuite/ChangeLog:
2016-01-12 Pedro Alves <palves@redhat.com>
* gdb.base/random-signal.exp (do_test): New procedure, with body
of testcase moved in.
(top level) Call it twice, once with "run" and once with "attach".
[This reapplies a change that was accidentally reverted with c0ecb95f3d.]
Before:
(gdb) info threads
Id Target Id Frame
3 Thread 0x7ffff77c3700 (LWP 29035) callme () at foo.c:30
2 Thread 0x7ffff7fc4700 (LWP 29034) 0x000000000040087b in child_function_2 (arg=0x0) at foo.c:60
* 1 Thread 0x7ffff7fc5740 (LWP 29030) 0x0000003b37209237 in pthread_join (threadid=140737353893632, thread_return=0x0) at pthread_join.c:92
After:
(gdb) info threads
Id Target Id Frame
* 1 Thread 0x7ffff7fc5740 (LWP 29030) 0x0000003b37209237 in pthread_join (threadid=140737353893632, thread_return=0x0) at pthread_join.c:92
2 Thread 0x7ffff7fc4700 (LWP 29034) 0x000000000040087b in child_function_2 (arg=0x0) at foo.c:60
3 Thread 0x7ffff77c3700 (LWP 29035) callme () at foo.c:30
gdb/doc/ChangeLog:
2015-11-24 Pedro Alves <palves@redhat.com>
PR 17539
* gdb.texinfo (Inferiors and Programs): Adjust "maint info
program-spaces" example to ascending order listing.
(Threads): Adjust "info threads" example to ascending order
listing.
(Forks): Adjust "info inferiors" example to ascending order
listing.
gdb/ChangeLog:
2015-11-24 Pedro Alves <palves@redhat.com>
PR 17539
* inferior.c (add_inferior_silent): Append the new inferior to the
end of the list.
* progspace.c (add_program_space): Append the new pspace to the
end of the list.
* thread.c (new_thread): Append the new thread to the end of the
list.
gdb/testsuite/ChangeLog:
2015-11-24 Pedro Alves <palves@redhat.com>
PR 17539
* gdb.base/foll-exec-mode.exp: Adjust to GDB listing inferiors and
threads in ascending order.
* gdb.base/foll-fork.exp: Likewise.
* gdb.base/foll-vfork.exp: Likewise.
* gdb.base/multi-forks.exp: Likewise.
* gdb.mi/mi-nonstop.exp: Likewise.
* gdb.mi/mi-nsintrall.exp: Likewise.
* gdb.multi/base.exp: Likewise.
* gdb.multi/multi-arch.exp: Likewise.
* gdb.python/py-inferior.exp: Likewise.
* gdb.threads/break-while-running.exp: Likewise.
* gdb.threads/execl.exp: Likewise.
* gdb.threads/gcore-thread.exp: Likewise.
* gdb.threads/info-threads-cur-sal.exp: Likewise.
* gdb.threads/kill.exp: Likewise.
* gdb.threads/linux-dp.exp: Likewise.
* gdb.threads/multiple-step-overs.exp: Likewise.
* gdb.threads/next-bp-other-thread.exp: Likewise.
* gdb.threads/step-bg-decr-pc-switch-thread.exp: Likewise.
* gdb.threads/step-over-lands-on-breakpoint.exp: Likewise.
* gdb.threads/step-over-trips-on-watchpoint.exp: Likewise.
* gdb.threads/thread-find.exp: Likewise.
* gdb.threads/tls.exp: Likewise.
* lib/mi-support.exp (mi_reverse_list): Delete.
(mi_check_thread_states): No longer reverse list.
3ca22649a6 is the first bad commit
commit 3ca22649a6
Author: Simon Marchi <simon.marchi@polymtl.ca>
Date: Mon Dec 21 12:51:54 2015 -0500
Remove HP-UX references fom testsuite
@@ -1013,13 +1013,6 @@ proc localvars_in_indirect_call { } {
#
gdb_test_multiple "finish" "finish from indirectly called function" {
- -re "\\(\\*pointer_to_call0a\\) \\(c, s, i, l\\);.*First.*$gdb_prompt $" {
- #On hppa2.0w-hp-hpux11.00, gdb finishes at one line earlier than
- #hppa1.1-hp-hpux11.00. Therefore, an extra "step" is necessary
- #to continue the test.
- send_gdb "step\n"
- exp_continue
- }
-re ".*\\(\\*pointer_to_call0a\\) \\(c, s, i, l\\);.*Second.*$gdb_prompt $" {
pass "finish from indirectly called function"
}
->
finish^M
Run till exit from #0 call0a (c=97 'a', s=1, i=2, l=3) at ./gdb.base/funcargs.c:82^M
0x0804a189 in main () at ./gdb.base/funcargs.c:583^M
583 (*pointer_to_call0a) (c, s, i, l); /* First step into call0a. */^M
-(gdb) step^M
-584 (*pointer_to_call0a) (c, s, i, l); /* Second step into call0a. */^M
-(gdb) PASS: gdb.base/funcargs.exp: finish from indirectly called function
+(gdb) FAIL: gdb.base/funcargs.exp: finish from indirectly called function
step^M
-call0a (c=97 'a', s=1, i=2, l=3) at ./gdb.base/funcargs.c:82^M
-82 c = 'a';^M
-(gdb) PASS: gdb.base/funcargs.exp: stepping into indirectly called function
+584 (*pointer_to_call0a) (c, s, i, l); /* Second step into call0a. */^M
+(gdb) FAIL: gdb.base/funcargs.exp: stepping into indirectly called function
At least on x86_64 with testsuite in -m32 (expecting native i386 would be the
same).
Pedro Alves:
The difference is that with newer GCC there's an extra instruction
after the call which is still assigned to line 583:
$ diff -up /tmp/4.8.3 /tmp/6.0.0 -U 1000
--- /tmp/4.8.3 2016-01-11 12:37:39.611089156 +0000
+++ /tmp/6.0.0 2016-01-11 13:21:00.021127976 +0000
@@ -1,27 +1,30 @@
583 (*pointer_to_call0a) (c, s, i, l); /* First step into call0a. */
mov 0x804d060,%ebx
mov 0x804d050,%ecx
movzwl 0x804d040,%eax
movswl %ax,%edx
movzbl 0x804d030,%eax
movsbl %al,%eax
- mov %ebx,0xc(%esp)
- mov %ecx,0x8(%esp)
- mov %edx,0x4(%esp)
- mov %eax,(%esp)
- mov 0x7c(%esp),%eax
+ push %ebx
+ push %ecx
+ push %edx
+ push %eax
+ mov -0x1c(%ebp),%eax
call *%eax
+ add $0x10,%esp
584 (*pointer_to_call0a) (c, s, i, l); /* Second step into call0a. */
mov 0x804d060,%ebx
mov 0x804d050,%ecx
movzwl 0x804d040,%eax
movswl %ax,%edx
movzbl 0x804d030,%eax
movsbl %al,%eax
- mov %ebx,0xc(%esp)
- mov %ecx,0x8(%esp)
- mov %edx,0x4(%esp)
- mov %eax,(%esp)
- mov 0x7c(%esp),%eax
+ push %ebx
+ push %ecx
+ push %edx
+ push %eax
+ mov -0x1c(%ebp),%eax
call *%eax
+ add $0x10,%esp
+
I don't know why -m32 changed to push/add instead of mov while 64-bit hasn't.
This is most likely needed on non-x86 ports as well.
gdb/testsuite/ChangeLog
2016-01-11 Jan Kratochvil <jan.kratochvil@redhat.com>
Pedro Alves <palves@redhat.com>
* gdb.base/funcargs.exp (finish from indirectly called function):
Reintroduce the case for 'First'.
fe33faff35 is the first bad commit
commit fe33faff35
Author: Simon Marchi <simon.marchi@ericsson.com>
Date: Tue Dec 22 10:52:31 2015 -0500
Remove HP-UX reference in foll-vfork.exp
FAIL: gdb.base/foll-vfork.exp: exec: vfork parent follow, finish after tcatch vfork: continue to vfork
FAIL: gdb.base/foll-vfork.exp: exec: vfork child follow, finish after tcatch vfork: continue to vfork
FAIL: gdb.base/foll-vfork.exp: exit: vfork parent follow, finish after tcatch vfork: continue to vfork
FAIL: gdb.base/foll-vfork.exp: exit: vfork child follow, finish after tcatch vfork: continue to vfork
It happens for plain gdb.base/foll-vfork.exp runtest on Fedora 23 x86_64.
-Temporary catchpoint 2 (vforked process 24562), vfork () at ../sysdeps/unix/sysv/linux/x86_64/vfork.S:52^M
+Temporary catchpoint 2 (vforked process 25345), vfork () at ../sysdeps/unix/sysv/linux/x86_64/vfork.S:52^M
52 pushq %rdi^M
Current language: auto^M
The current source language is "auto; currently asm".^M
-(gdb) PASS: gdb.base/foll-vfork.exp: exec: vfork parent follow, finish after tcatch vfork: continue to vfork
+(gdb) FAIL: gdb.base/foll-vfork.exp: exec: vfork parent follow, finish after tcatch vfork: continue to vfork
-Temporary catchpoint 2 (vforked process 24629), vfork () at ../sysdeps/unix/sysv/linux/x86_64/vfork.S:52^M
+Temporary catchpoint 2 (vforked process 25411), vfork () at ../sysdeps/unix/sysv/linux/x86_64/vfork.S:52^M
52 pushq %rdi^M
Current language: auto^M
The current source language is "auto; currently asm".^M
-(gdb) PASS: gdb.base/foll-vfork.exp: exec: vfork child follow, finish after tcatch vfork: continue to vfork
+(gdb) FAIL: gdb.base/foll-vfork.exp: exec: vfork child follow, finish after tcatch vfork: continue to vfork
So I have reverted it and just simplified the comment.
The third case is not necessary during testing but I have changed back all the
3 cases.
Pedro Alves:
I know it was that way before, but would you mind moving this to a helper
proc.
gdb/testsuite/ChangeLog
2016-01-11 Jan Kratochvil <jan.kratochvil@redhat.com>
Pedro Alves <palves@redhat.com>
* gdb.base/foll-vfork.exp (tcatch_vfork_then_parent_follow)
(tcatch_vfork_then_child_follow_exec)
(tcatch_vfork_then_child_follow_exit): Revert back DWARF vfork
identification.
I was getting
gu (print arg0)^M
= 0x7fffffffdafb
"/unsafebuild-x86_64-redhat-linux-gnu/gdb/testsuite.unix.-m64/outputs/gdb.guile/scm-value/scm-"...^M
(gdb) FAIL: gdb.guile/scm-value.exp: verify dereferenced value
python print (arg0)^M
0x7fffffffdafd
"/unsafebuild-x86_64-redhat-linux-gnu/gdb/testsuite.unix.-m64/outputs/gdb.python/py-value/py-v"...^M
(gdb) FAIL: gdb.python/py-value.exp: verify dereferenced value
and also:
(gdb) p argv[0]^M
$2 = 0x7fffffffd832 "/home/jkratoch/redhat/gdb-test-", 'x' <repeats 169
times>...^M
(gdb) FAIL: gdb.guile/scm-value.exp: argv[0] should be available on this
target
gdb/testsuite/ChangeLog
2016-01-11 Jan Kratochvil <jan.kratochvil@redhat.com>
* gdb.guile/scm-value.exp (test_value_in_inferior): Set print elements
and repeats to unlimited.
* gdb.python/py-value.exp: Likewise.
* lib/gdb.exp (gdb_has_argv0): Save and temporarily set print elements
and repeats to unlimited.
One more I just found.
Tested with native, native-gdbserver and native-extended-gdbserver on
Linux.
gdb/testsuite/ChangeLog:
* gdb.base/foll-vork.exp: Remove HP-UX special case.
This patch removes cases from the testsuite that are not posssibly used. The
messages "Catch of * not yet implemented" were removed here:
https://www.sourceware.org/ml/gdb-patches/2004-01/msg00679.html
I changed the regexp at the same time to match the string more closely.
gdb/testsuite/ChangeLog:
* gdb.base/break.exp: Remove dead code.
* gdb.base/sepdebug.exp: Likewise.
This patch removes all special cases for HP-UX, for which support has
been removed earlier, that I found in the testsuite. Note that the hppa
architecture != HP-UX, since other OSes can run on hppa, so I tried to
leave everything that is not HP-UX specific.
Two complete tests were completely HP-UX specific, so I removed them.
I ran the testsuite on Linux x86-64, native and native-gdbserver, and
noticed no regressions.
gdb/testsuite/ChangeLog:
* gdb.asm/asm-source.exp: Remove HP-UX references.
* gdb.base/annota1.exp: Likewise.
* gdb.base/annota3.exp: Likewise.
* gdb.base/attach.exp: Likewise.
* gdb.base/bigcore.exp: Likewise.
* gdb.base/break.exp: Likewise.
* gdb.base/call-ar-st.exp: Likewise.
* gdb.base/callfuncs.exp: Likewise.
* gdb.base/catch-fork-static.exp: Likewise.
* gdb.base/display.exp: Likewise.
* gdb.base/foll-exec-mode.exp: Likewise.
* gdb.base/foll-exec.exp: Likewise.
* gdb.base/foll-fork.exp: Likewise.
* gdb.base/foll-vfork.exp: Likewise.
* gdb.base/funcargs.exp: Likewise.
* gdb.base/hbreak2.exp: Likewise.
* gdb.base/inferior-died.exp: Likewise.
* gdb.base/interrupt.exp: Likewise.
* gdb.base/multi-forks.exp: Likewise.
* gdb.base/nodebug.exp: Likewise.
* gdb.base/sepdebug.exp: Likewise.
* gdb.base/solib1.c: Likewise.
* gdb.base/step-test.exp: Likewise.
* gdb.mi/non-stop.c: Likewise.
* gdb.mi/pthreads.c: Likewise.
* gdb.multi/bkpt-multi-exec.ex: Likewise.
* gdb.threads/pthreads.c: Likewise.
* gdb.threads/staticthreads.exp: Likewise.
* lib/future.exp: Likewise.
* lib/gdb.exp: Likewise.
* gdb.base/so-indr-cl.c: Remove.
* gdb.base/so-indr-cl.exp: Likewise.
* gdb.base/solib.c: Likewise.
* gdb.base/solib.exp: Likewise.
* gdb.base/solib2.c: Likewise.
This patch updates tests for fork and exec events in target remote mode.
In the majority of cases this was a simple matter of removing some code
that disabled the test for target remote. In a few cases the test needed
to be disabled; in those cases the gdb_protocol was checked instead of
using the [is_remote target] etc.
In a couple of cases we needed to use clean_restart, since target remote
doesn't support the run command, and in one case we had to modify an expect
expression to allow for a "multiprocess-style" ptid.
Tested with the patch that implemented target remote mode fork and exec
event support.
gdb/testsuite/ChangeLog:
* gdb.base/execl-update-breakpoints.exp (main): Enable for target
remote.
* gdb.base/foll-exec-mode.exp (main): Disable for target remote.
* gdb.base/foll-exec.exp (main): Enable for target remote.
* gdb.base/foll-fork.exp (main): Likewise.
* gdb.base/foll-vfork.exp (main): Likewise.
* gdb.base/multi-forks.exp (main): Likewise, and use clean_restart.
(proc continue_to_exit_bp_loc): Use clean_restart.
* gdb.base/pie-execl.exp (main): Disable for target remote.
* gdb.base/watch-vfork.exp (main): Enable for target remote.
* gdb.mi/mi-nsthrexec.exp (main): Likewise.
* gdb.threads/execl.exp (main): Likewise.
* gdb.threads/fork-child-threads.exp (main): Likewise.
* gdb.threads/fork-plus-threads.exp (main): Disable for target
remote.
* gdb.threads/fork-thread-pending.exp (main): Enable for target
remote.
* gdb.threads/linux-dp.exp (check_philosopher_stack): Allow
pid.tid style ptids, instead of just tid.
* gdb.threads/thread-execl.exp (main): Enable for target remote.
* gdb.threads/watchpoint-fork.exp (main): Likewise.
* gdb.trace/report.exp (use_collected_data): Allow pid.tid style
ptids, instead of just tid.
When a a user uses 'list +' to list forward through a source file they
eventually reach the end of the source file. Subsequent uses of 'list
+' result in an error message like this, that let the user know they are
at the end of the source file:
Line number XXX out of range; FILENAME has YYY lines.
Compare this to the current behaviour of 'list -' which lists backwards
through a source file. When the user reaches the beginning of the
source file, subsequent uses of 'list -' result in the command silently
returning. This can be confusing if the previous uses of 'list -' have
scrolled off the users display, the user receives no reminder that the
have already seen the start of the file.
After this commit a use of 'list -' when the user has already seen the
start of a file will receive the following error:
Already at the start of FILENAME.
gdb/ChangeLog:
* cli/cli-cmds.c (list_command): Add an error when trying to use
'-' to scan read off the start of the source file.
gdb/testsuite/ChangeLog:
* gdb.base/list.exp (test_list_forward): Add end of file error
test.
(test_repeat_list_command): Add end of file error test.
(test_list_backwards): Add beginning of file error test.
There is an inconsistency with the handling of the special +/- arguments
to the list command.
For the very first time that list is used (after the inferior has
changed locations) then only the first character of the argument string
is checked, so 'list +BLAH' will operate as 'list +' and 'list -----FOO'
will operate as 'list -'. This compares to each subsequent use of list,
where the whole argument string is checked, so 'list +BLAH' will try to
list lines of code around the function '+BLAH'.
This commit unifies the behaviour so that the whole argument string is
checked, in order to list the next 10, or previous 10 lines from a file
only 'list +' and 'list -' are now valid.
gdb/ChangeLog:
* cli/cli-cmds.c (list_command): Check that the argument string is
a single character, either '+' or '-'.
gdb/testsuite/ChangeLog:
* gdb.base/list.exp (test_list_invalid_args): New function,
defined, and called.
I happen to find that coremaker2.c isn't used in the testsuite (if I
don't miss anything). I don't believe it until I see this ChangeLog
entry,
1999-11-18 Fred Fish <fnf@cygnus.com>
* gdb.base/coremaker2.c: Add sample program for generating
cores that is more self contained than coremaker.c. Eventually
I'll add more code to this and tie it into the testsuite.
looks Fred didn't "tie it into testsuite" later.
gdb/testsuite:
2015-12-11 Yao Qi <yao.qi@linaro.org>
* gdb.base/coremaker2.c: Remove.
This change eliminates some failures on simulator targets and makes
the test run a bit quicker too - without this change, we have to wait
for timeouts.
gdb/testsuite/ChangeLog:
* gdb.base/async.exp (proc test_background): Add case
for asynchronous execution not supported.
Rename target_ops.arch_setup to .post_create_inferior. In the Linux
hook, continue calling the low arch setup, then also set ptrace flags.
This corrects the possibility of running without flags, demonstrated by
a new test that would fail to catch a fork before.
gdb/gdbserver/ChangeLog:
2015-12-04 Josh Stone <jistone@redhat.com>
* target.h (struct target_ops) <arch_setup>: Rename to ...
(struct target_ops) <post_create_inferior>: ... this.
(target_arch_setup): Rename to ...
(target_post_create_inferior): ... this, calling post_create_inferior.
* server.c (start_inferior): Update target_arch_setup calls to
target_post_create_inferior.
* linux-low.c (linux_low_ptrace_options): Forward declare.
(linux_arch_setup): Update its comment for general use.
(linux_post_create_inferior): New, run arch_setup and setup ptrace.
(struct linux_target_ops): Use linux_post_create_inferior.
* lynx-low.c (struct lynx_target_ops): Update arch_setup stub comment
to post_create_inferior.
* nto-low.c (struct nto_target_ops): Likewise.
* spu-low.c (struct spu_target_ops): Likewise.
* win32-low.c (struct win32_target_ops): Likewise.
gdb/testsuite/ChangeLog:
2015-12-04 Josh Stone <jistone@redhat.com>
* gdb.base/catch-fork-static.exp: New.
In my remote cross testing (x86_64 host and aarch64 target), the test
gdb.base/sizeof.exp is skipped because gdb,noinferiorio is defined in
my gdbserver board file. Tests are skipped because the test checks
the expected value from the program's output, but I don't see why must
do it this way. With my patch applied, we can save the result in variable
in the program, and check the variable then. Then, the test doesn't rely
on inferiorio.
gdb/testsuite:
2015-12-03 Yao Qi <yao.qi@linaro.org>
* gdb.base/sizeof.c: Don't include stdio.h and
../lib/unbuffer_output.c.
(main): New variable 'size' and 'value'. Remove printf and
gdb_unbuffer_output. Assign return value to size and value.
* gdb.base/sizeof.exp: Remove the checking to gdb,noinferiorio
at the beginning.
(check_sizeof): Check the result by printing variable 'size'.
(check_valueof): Check the result by printing variable 'value'.
Testing with the extended-remote board with "maint set target-non-stop
on" shows a dprintf-non-stop.exp regression. The issue is simply that
the test is expecting output that is only valid for the native target:
native:
[process 8676] #1 stopped.
remote:
[Thread 8900.8900] #1 stopped.
In order to expose this without "maint set target-non-stop on", this
restarts gdb with non-stop mode already enabled.
gdb/testsuite/ChangeLog:
2015-11-30 Pedro Alves <palves@redhat.com>
* gdb.base/dprintf-non-stop.exp: Use build_executable instead of
prepare_for_testing. Start gdb with "set non-stop on" appended to
GDBFLAGS. Lax expected stop output.
Before:
(gdb) info display
Auto-display expressions now in effect:
Num Enb Expression
3: y 1
2: y 1
1: y 1
After:
(gdb) info display
Auto-display expressions now in effect:
Num Enb Expression
1: y 1
2: y 1
3: y 1
gdb/ChangeLog:
2015-11-24 Pedro Alves <palves@redhat.com>
PR 17539
* printcmd.c (display_command): Append new display at the end of
the list.
gdb/testsuite/ChangeLog:
2015-11-24 Pedro Alves <palves@redhat.com>
PR 17539
* gdb.base/display.exp: Expect displays to be sorted in ascending
order. Use multi_line.
* gdb.base/solib-display.exp: Likewise.
Before:
(gdb) info checkpoints
3 process 29132 at 0x4008ad, file foo.c, line 81
2 process 29131 at 0x4008ad, file foo.c, line 81
1 process 29130 at 0x4008ad, file foo.c, line 81
* 0 Thread 0x7ffff7fc5740 (LWP 29128) (main process) at 0x4008ad, file foo.c, line 81
After:
(gdb) info checkpoints
* 0 Thread 0x7ffff7fc5740 (LWP 29128) (main process) at 0x4008ad, file foo.c, line 81
1 process 29130 at 0x4008ad, file foo.c, line 81
2 process 29131 at 0x4008ad, file foo.c, line 81
3 process 29132 at 0x4008ad, file foo.c, line 81
gdb/ChangeLog:
2015-11-24 Pedro Alves <palves@redhat.com>
PR 17539
* printcmd.c (display_command): Append new display at the end of
the list.
gdb/testsuite/ChangeLog:
2015-11-24 Pedro Alves <palves@redhat.com>
PR 17539
* gdb.base/display.exp: Expect displays to be sorted in ascending
order. Use multi_line.
* gdb.base/solib-display.exp: Likewise.
Before:
(gdb) info threads
Id Target Id Frame
3 Thread 0x7ffff77c3700 (LWP 29035) callme () at foo.c:30
2 Thread 0x7ffff7fc4700 (LWP 29034) 0x000000000040087b in child_function_2 (arg=0x0) at foo.c:60
* 1 Thread 0x7ffff7fc5740 (LWP 29030) 0x0000003b37209237 in pthread_join (threadid=140737353893632, thread_return=0x0) at pthread_join.c:92
After:
(gdb) info threads
Id Target Id Frame
* 1 Thread 0x7ffff7fc5740 (LWP 29030) 0x0000003b37209237 in pthread_join (threadid=140737353893632, thread_return=0x0) at pthread_join.c:92
2 Thread 0x7ffff7fc4700 (LWP 29034) 0x000000000040087b in child_function_2 (arg=0x0) at foo.c:60
3 Thread 0x7ffff77c3700 (LWP 29035) callme () at foo.c:30
gdb/doc/ChangeLog:
2015-11-24 Pedro Alves <palves@redhat.com>
PR 17539
* gdb.texinfo (Inferiors and Programs): Adjust "maint info
program-spaces" example to ascending order listing.
(Threads): Adjust "info threads" example to ascending order
listing.
(Forks): Adjust "info inferiors" example to ascending order
listing.
gdb/ChangeLog:
2015-11-24 Pedro Alves <palves@redhat.com>
PR 17539
* inferior.c (add_inferior_silent): Append the new inferior to the
end of the list.
* progspace.c (add_program_space): Append the new pspace to the
end of the list.
* thread.c (new_thread): Append the new thread to the end of the
list.
gdb/testsuite/ChangeLog:
2015-11-24 Pedro Alves <palves@redhat.com>
PR 17539
* gdb.base/foll-exec-mode.exp: Adjust to GDB listing inferiors and
threads in ascending order.
* gdb.base/foll-fork.exp: Likewise.
* gdb.base/foll-vfork.exp: Likewise.
* gdb.base/multi-forks.exp: Likewise.
* gdb.mi/mi-nonstop.exp: Likewise.
* gdb.mi/mi-nsintrall.exp: Likewise.
* gdb.multi/base.exp: Likewise.
* gdb.multi/multi-arch.exp: Likewise.
* gdb.python/py-inferior.exp: Likewise.
* gdb.threads/break-while-running.exp: Likewise.
* gdb.threads/execl.exp: Likewise.
* gdb.threads/gcore-thread.exp: Likewise.
* gdb.threads/info-threads-cur-sal.exp: Likewise.
* gdb.threads/kill.exp: Likewise.
* gdb.threads/linux-dp.exp: Likewise.
* gdb.threads/multiple-step-overs.exp: Likewise.
* gdb.threads/next-bp-other-thread.exp: Likewise.
* gdb.threads/step-bg-decr-pc-switch-thread.exp: Likewise.
* gdb.threads/step-over-lands-on-breakpoint.exp: Likewise.
* gdb.threads/step-over-trips-on-watchpoint.exp: Likewise.
* gdb.threads/thread-find.exp: Likewise.
* gdb.threads/tls.exp: Likewise.
* lib/mi-support.exp (mi_reverse_list): Delete.
(mi_check_thread_states): No longer reverse list.
The comment for the code in question says:
/* If the minimal symbol has a zero size, save it
but keep scanning backwards looking for one with
a non-zero size. A zero size may mean that the
symbol isn't an object or function (e.g. a
label), or it may just mean that the size was not
specified. */
As written, the code in question will only scan past the first symbol
of zero size. My change fixes the implementation to match the
comment.
Having this correct is important when the compiler generates several
local labels that are left in place by the linker. (I've been told
that the linker should eliminate these symbols, but I know of one
architecture for which this is not happening.)
I've created a test case called asmlabel.c. It's pretty simple:
main (int argc, char **argv)
{
asm ("L0:");
v = 0;
asm ("L1:");
v = 1; /* set L1 breakpoint here */
asm ("L2:");
v = 2; /* set L2 breakpoint here */
return 0;
}
If breakpoints are placed on the lines indicated by the comments,
this is the behavior of GDB built without my patch:
(gdb) continue
Continuing.
Breakpoint 2, L1 () at asmlabel.c:26
26 v = 1; /* set L1 breakpoint here */
Note that L1 appears as the function instead of main. This is not
what we want to happen. With my patch in place, we see the desired
behavior instead:
(gdb) continue
Continuing.
Breakpoint 2, main (argc=1, argv=0x7fffffffdb88) at asmlabel.c:26
26 v = 1; /* set L1 breakpoint here */
gdb/ChangeLog:
* minsyms.c (lookup_minimal_symbol_by_pc_section_1): Scan backwards
over all zero-sized symbols.
gdb/testsuite/ChangeLog:
* gdb.base/asmlabel.exp: New test.
* gdb.base/asmlabel.c: New test case.
One of our users reported an internal error using the "bt full"
command. In their situation, reproducing involved the following
scenario:
(gdb) frame 1
(gdb) bt full
#0 0xf7783430 in __kernel_vsyscall ()
No symbol table info available.
#1 0xf5550aeb in waitpid () at ../sysdeps/unix/syscall-template.S:81
No locals.
[...]
#6 0x0fe83139 in xxxx (arg=...)
[...some locals printed, and then...]
<S17b> =
[...]/dwarf2loc.c:364: internal-error: dwarf_expr_frame_base: Assertion
`framefunc != NULL' failed.
As shown above, the error happens while GDB is trying to print the value
of <S17b>, which is a local string internally generated by the compiler.
For that, it finds that the array lives in memory, and therefore tries
to create a struct value for it via:
case DWARF_VALUE_MEMORY:
{
CORE_ADDR address = dwarf_expr_fetch_address (ctx, 0);
[...]
retval = value_at_lazy (type, address + byte_offset);
Unfortunately for us, TYPE happens to be an array whose bounds
are dynamic. More precisely, the bounds of our arrays are described
in the debugging info as being...
<4><2c1985e>: Abbrev Number: 33 (DW_TAG_subrange_type)
<2c1985f> DW_AT_type : <0x2c1989c>
<2c19863> DW_AT_lower_bound : <0x2c19835>
<2c19867> DW_AT_upper_bound : <0x2c19841>
... which are references to a pair of local variables. For instance,
the lower bound is a reference to the following DIE
<3><2c19835>: Abbrev Number: 32 (DW_TAG_variable)
<2c19836> DW_AT_name : [...]
<2c1983a> DW_AT_type : <0x2c198b4>
<2c1983e> DW_AT_artificial : 1
<2c1983e> DW_AT_location : 2 byte block: 91 58 (DW_OP_fbreg: -40)
As a result of the above, value_at_lazy indirectly triggers
a resolution of TYPE (via value_from_contents_and_address),
which means a resolution of TYPE's bounds, and as seen in
the DW_AT_location attribute above for our bounds, computing
the bound's location requires the frame (its location expression
uses DW_OP_fbreg).
Unfortunately for us, value_at_lazy does not get passed a frame,
we've lost the relevant frame when we try to resolve the array's
bounds. Instead, resolve_dynamic_range gets calls dwarf2_evaluate_property
with NULL as the frame:
static struct type *
resolve_dynamic_range (struct type *dyn_range_type,
struct property_addr_info *addr_stack)
{
[...]
if (dwarf2_evaluate_property (prop, NULL, addr_stack, &value))
^^^^
... which then handles this by using the selected frame instead:
if (frame == NULL && has_stack_frames ())
frame = get_selected_frame (NULL);
In our case, the selected frame happens to be frame #1, which is
a frame where we have a minimal amount of debugging info, and in
particular, no debug info for the function itself. And because of that,
when we try to determine the frame's base...
static void
dwarf_expr_frame_base (void *baton, const gdb_byte **start,
size_t * length)
{
struct dwarf_expr_baton *debaton = (struct dwarf_expr_baton *) baton;
const struct block *bl = get_frame_block (debaton->frame, NULL);
[...]
framefunc = block_linkage_function (bl);
... framefunc ends up being NULL, which triggers the assert
in that same function:
gdb_assert (framefunc != NULL);
This patches avoids the issue by temporarily setting the selected_frame
before printing the locals of each frames.
This patch also adds a small testcase, which reproduces the same
issue, but with a slightly different outcome:
(gdb) bt full
#0 0x000000000040049a in opaque_routine ()
No symbol table info available.
#1 0x0000000000400532 in main () at wrong_frame_bt_full-main.c:20
my_table_size = 3
my_table = <error reading variable my_table (frame address is not available.)>
With this patch, the output becomes:
(gdb) bt full
[...]
my_table = {0, 1, 2}
gdb/ChangeLog:
* stack.c (print_frame_local_vars): Temporarily set the selected
frame to FRAME while printing the frame's local variables.
gdb/testsuite/ChangeLog:
* gdb.base/wrong_frame_bt_full-main.c: New file.
* gdb.base/wrong_frame_bt_full-opaque.c: New file.
* gdb.base/wrong_frame_bt_full.exp: New file.
The Linux kernel disables the FPU upon returning to userland. This
introduces spurious failures in the register preservation tests in
callfuncs.exp, since the pstate.PEF bit gets cleared after system
calls.
This patch filters out the pstate register in sparc64-*-linux-gnu
targets, so the relevant tests are no longer fooled and pass.
gdb/testsuite/ChangeLog:
2015-11-20 Jose E. Marchesi <jose.marchesi@oracle.com>
* gdb.base/callfuncs.exp (fetch_all_registers): Filter out the
pstate register when comparing registers values in
sparc64-*-linux-gnu targets to avoid spurious differences.
This patch removes the leftover of the d10v stuff in the testsuite
directory. The d10v port was removed in GDB 6.7, but I happen to see
that there are still some leftovers about d10v in testsuite.
gdb/testsuite:
2015-11-13 Yao Qi <yao.qi@linaro.org>
* gdb.base/call-sc.exp (test_scalar_returns): Remove the
comments about d10v.
(test_scalar_returns): Likewise.
* gdb.base/d10v.ld: Remove.
* gdb.base/overlays.exp: Remove the target triplet checking for
d10v-*-*.
* gdb.base/structs.exp (test_struct_returns): Remove the
comments about d10v.
(test_struct_calls): Likewise.
gdb.base/gnu_vector.c printf the vector and gdb.base/gnu_vector.exp
expects the output by gdb_test_multiple. Nowadays, the test doesn't
expect the output from inferior_spawn_id, which is wrong. Even we
change the test to expect from inferior_spawn_id for the inferior
output, it is still possible the inferior exit before tcl/expect gets
the inferior output. We see this fail on both s390x-linux and
ppc-linux on buildbot,
FAIL: gdb.base/gnu_vector.exp: verify vector return value (the program exited)
https://sourceware.org/ml/gdb-testers/2015-q4/msg04922.htmlhttps://sourceware.org/ml/gdb-testers/2015-q4/msg04952.html
In order to address these two shortcomings above in gnu_vector.exp,
this patch rewrites the test a little bit. Get rid of checking the
inferior output, and instead checking them by printing them. In this
way, the test can also be run on the target without inferior io
(gdb,noinferiorio is set in the board file).
gdb/testsuite:
2015-11-13 Yao Qi <yao.qi@linaro.org>
* gdb.base/gnu_vector.exp: Check the return value by "p res".
* gdb.base/gnu_vector.c: Don't include stdio.h.
(main): Don't print res and call add_some_intvecs.
Nowadays, in the range-stepping tests, we check not only the number of
vCont;r packets but also the number of vCont;s packets, because we think
the remote target which can do range stepping must support single step.
However, if we turn displaced stepping on, the remote target (GDBserver)
can do range stepping, and support single step, but GDB may decide to
resume instructions in the scratchpad rather than single step them one
by one for displaced stepping. For example, when aarch64 GDB debugs
arm linux program with aarch64 GDBserver, GDBserver supports both range
stepping and single step, but GDB (with the gdbarch for arm-linux)
decides resume instructions in the scratchpad, so in the RSP traffic,
there is no vCont;s packet at all, and some range-stepping.exp tests
fail,
FAIL: gdb.base/range-stepping.exp: multi insns: next: vCont;s=1 vCont;r=1
This patch is to get rid of the checking to the number of vCont;s in
exec_cmd_expect_vCont_count.
gdb/testsuite:
2015-10-21 Yao Qi <yao.qi@linaro.org>
* lib/range-stepping-support.exp (exec_cmd_expect_vCont_count):
Remove argument exp_vCont_s.
* gdb.base/range-stepping.exp: Callers updated.
* gdb.trace/range-stepping.exp: Likewise.
The existing logic was simply to flip syscall entry/return state when a
syscall trap was seen, and even then only with active 'catch syscall'.
That can get out of sync if 'catch syscall' is toggled at odd times.
This patch updates the entry/return state for all syscall traps,
regardless of catching state, and also updates known syscall state for
other kinds of traps. Almost all PTRACE_EVENT stops are delivered from
the middle of a syscall, so this can act like an entry. Every other
kind of ptrace stop is only delivered outside of syscall event pairs, so
marking them ignored ensures the next syscall trap looks like an entry.
Three new test scenarios are added to catch-syscall.exp:
- Disable 'catch syscall' from an entry to deliberately miss the return
event, then re-enable to make sure a new entry is recognized.
- Enable 'catch syscall' for the first time from a vfork event, which is
a PTRACE_EVENT_VFORK in the middle of the syscall. Make sure the next
syscall event is recognized as the return.
- Make sure entry and return are recognized for an ENOSYS syscall. This
is to defeat a common x86 hack that uses the pre-filled ENOSYS return
value as a sign of being on the entry side.
gdb/ChangeLog:
2015-10-19 Josh Stone <jistone@redhat.com>
* linux-nat.c (linux_handle_syscall_trap): Always update entry/
return state, even when not actively catching syscalls at all.
(linux_handle_extended_wait): Mark syscall_state like an entry.
(wait_lwp): Set syscall_state ignored for other traps.
(linux_nat_filter_event): Likewise.
gdb/testsuite/ChangeLog:
2015-10-19 Josh Stone <jistone@redhat.com>
* gdb.base/catch-syscall.c: Include <sched.h>.
(unknown_syscall): New variable.
(main): Trigger a vfork and an unknown syscall.
* gdb.base/catch-syscall.exp (vfork_syscalls): New variable.
(unknown_syscall_number): Likewise.
(check_call_to_syscall): Accept an optional syscall pattern.
(check_return_from_syscall): Likewise.
(check_continue): Likewise.
(test_catch_syscall_without_args): Check for vfork and ENOSYS.
(test_catch_syscall_skipping_return): New test toggling off 'catch
syscall' to step over the syscall return, then toggling back on.
(test_catch_syscall_mid_vfork): New test turning on 'catch syscall'
during a PTRACE_EVENT_VFORK stop, in the middle of a vfork syscall.
(do_syscall_tests): Call test_catch_syscall_without_args and
test_catch_syscall_mid_vfork.
(test_catch_syscall_without_args_noxml): Check for vfork and ENOSYS.
(fill_all_syscalls_numbers): Initialize unknown_syscall_number.
The func command, available when starting gdb in dbx mode, is supposed
to take a function name and locate the frame for that function in the
stack. This has been broken for a while due to an invalid check of the
arguments within the worker function. Fixed in this commit.
gdb/ChangeLog:
* stack.c (func_command): Return early when there is no ARG
string.
gdb/testsuite/ChangeLog:
* gdb.base/dbx.exp (test_func): Remove xfails, update expected
results.
Assume foo_array is a pointer to a C structure. GDB must evaluate the
following expression properly, but it does not currently:
(gdb) print 1 && &foo_array[1].a
Attempt to take address of value not located in memory.
The problem is that in EVAL_AVOID_SIDE_EFFECTS mode,
eval.c:evaluate_subexp_standard always returns a not_lval value as the
result for a STRUCTOP_STRUCT operation. As a consequence, the rest of
the code believes that one cannot take the address of the returned
value.
This patch fixes STRUCTOP_STRUCT handling so that the VALUE_LVAL
attribute for the returned value is properly initialized. After this
change, the above session becomes:
(gdb) print 1 && &foo_array[1].a
$1 = 1
gdb/ChangeLog:
* eval.c (evaluate_subexp_standard) <STRUCTOP_STRUCT>: If
EVAL_AVOID_SIDE_EFFECTS mode, forward the VALUE_LVAL attribute
to the returned value.
gdb/testsuite/ChangeLog:
* gdb.base/nested-addr.c: New file.
* gdb.base/nested-addr.exp: New testcase.
Tested on x86_64-linux, no regression.
This patch fixes this racy failure, with the native-extended-gdbserver
board:
(gdb) run
Starting program: build/gdb/testsuite/outputs/gdb.base/a2-run/a2-run
Remote debugging from host 127.0.0.1
Process build/gdb/testsuite/outputs/gdb.base/a2-run/a2-run created; pid = 23832
Reading /lib64/ld-linux-x86-64.so.2 from remote target...
warning: File transfers from remote targets can be slow. Use "set sysroot" to access files locally instead.
Reading /lib64/ld-linux-x86-64.so.2 from remote target...
Reading /lib64/libm.so.6 from remote target...
Reading /lib64/libc.so.6 from remote target...
[Inferior 1 (process 23832) exited with code 01]
(gdb) FAIL: gdb.base/a2-run.exp: run "a2-run" with no args
PASS: gdb.base/a2-run.exp: no spurious messages at program exit
run 5
Starting program: build/gdb/testsuite/outputs/gdb.base/a2-run/a2-run 5
Reading /lib64/ld-linux-x86-64.so.2 from remote target...
usage: factorial <number>
Child exited with status 1
Note that the output is correct; it's just that inferior output
appeared after gdb's output, and the test doesn't handle that
correctly.
This comment isn't really correct, unfortunately:
# waiting. If we had already seen the status wrapper exit,
# gdb_test_multiple/expect has no spawn ids left, and thus
# returns.
That's true of expect in general, but I had missed / forgot that
gdb_test_multiple internally has extra matches using "-i
$gdb_spawn_id", so even if the caller clears all the indirect spawn id
lists, gdb_test_multiple will continue waiting.
So do a conditional exp_continue manually instead.
gdb/testsuite/ChangeLog:
2015-10-09 Pedro Alves <palves@redhat.com>
* gdb.base/a2-run.exp (maybe_exp_continue): New procedure.
(top level): Use it in the run with no args test.
clang names the local variable t_structs_a.buf.
gdb/testsuite/ChangeLog:
* gdb.base/callfuncs.exp (do_function_calls): Handle clang naming
of function static local variable.
This patch, relative to a tree with
https://sourceware.org/ml/gdb-patches/2015-08/msg00295.html, fixes
issues/crashes that trigger if something unexpected happens during a
hook-stop.
E.g., if the inferior disappears while running the hook-stop, we hit
failed assertions:
(gdb) define hook-stop
Type commands for definition of "hook-stop".
End with a line saying just "end".
>kill
>end
(gdb) si
Kill the program being debugged? (y or n) [answered Y; input not from terminal]
/home/pedro/gdb/mygit/build/../src/gdb/thread.c:88: internal-error: inferior_thread: Assertion `tp' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Quit this debugging session? (y or n)
I noticed that if a hook-stop issues a synchronous execution command,
we print the same stop event twice:
(gdb) define hook-stop
Type commands for definition of "hook-stop".
End with a line saying just "end".
>si
>end
(gdb) si
0x000000000040074a 42 args[i] = 1; /* Init value. */ <<<<<<< once
0x000000000040074a 42 args[i] = 1; /* Init value. */ <<<<<<< twice
(gdb)
In MI:
*stopped,reason="end-stepping-range",frame={addr="0x000000000040074a",func="main",args=[],file="threads.c",fullname="/home/pedro/gdb/tests/threads.c",line="42"},thread-id="1",stopped-threads="all",core="0"
*stopped,reason="end-stepping-range",frame={addr="0x000000000040074a",func="main",args=[],file="threads.c",fullname="/home/pedro/gdb/tests/threads.c",line="42"},thread-id="1",stopped-threads="all",core="0"
(gdb)
The fix has GDB stop processing the event if the context changed. I
don't expect people to be doing crazy things from the hook-stop.
E.g., it gives me headaches to try to come up a proper behavior for
handling a thread change from a hook-stop... (E.g., imagine the
hook-stop does thread N; step, with scheduler-locing on). I think the
most important bit here is preventing crashes.
The patch adds a new hook-stop.exp test that covers the above and also
merges in the old hook-stop-continue.exp and hook-stop-frame.exp into
the same framework.
gdb/ChangeLog:
2015-09-14 Pedro Alves <palves@redhat.com>
* infrun.c (current_stop_id): New global.
(get_stop_id, new_stop_id): New functions.
(fetch_inferior_event): Handle normal_stop proceeding the target.
(struct stop_context): New.
(save_stop_context, release_stop_context_cleanup)
(stop_context_changed): New functions.
(normal_stop): Return true if the hook-stop changes the stop
context.
* infrun.h (get_stop_id): Declare.
(normal_stop): Now returns int. Add documentation.
gdb/testsuite/ChangeLog:
2015-09-14 Pedro Alves <palves@redhat.com>
* gdb.base/hook-stop-continue.c: Delete.
* gdb.base/hook-stop-continue.exp: Delete.
* gdb.base/hook-stop-frame.c: Delete.
* gdb.base/hook-stop-frame.exp: Delete.
* gdb.base/hook-stop.c: New file.
* gdb.base/hook-stop.exp: New file.
This patch updates several exec-related tests and some of the library
functions in order to get them running with extended-remote. There were
three changes that were required, as follows:
In gdb.base/foll-exec.exp, use 'clean_start' in place of proc 'zap_session'
to reset the state of the debugger between tests. This sets 'remote
exec-file' to execute the correct binary file in each subsequent test.
In gdb.base/pie-execl.exp, there is an expect statement with an expression
that is used to match output from both gdb and the program under debug.
For the remote target, this had to be split into two expressions, using
$inferior_spawn_id to match the output from the program.
Because I had encountered problems with extended-remote exec events in
non-stop mode in my manual testing, I added non-stop testing to the
non-ldr-exc-[1234].exp tests. In order to set non-stop mode for remote
targets, it is necessary to 'set non-stop on' after gdb has started, but
before it connects to gdbserver. This is done using 'save_vars' to set
non-stop mode in GDBFLAGS, so GDB sets non-stop mode on startup.
gdb/testsuite/ChangeLog:
* gdb.base/foll-exec.c: Add copyright header. Fix
formatting issues.
* gdb.base/foll-exec.exp (zap_session): Delete proc.
(do_exec_tests): Use clean_restart in place of zap_session,
and for test initialization. Fix formatting issues. Use
fail in place of perror.
* gdb.base/pie-execl.exp (main): Use 'inferior_spawn_id' in
an expect statement to match an expression with output from
the program under debug.
* gdb.threads/non-ldr-exc-1.exp (do_test, main): Add
non-stop tests and pass stop mode argument to clean_restart.
Use save_vars to enable non-stop in GDBFLAGS.
* gdb.threads/non-ldr-exc-2.exp: Likewise.
* gdb.threads/non-ldr-exc-3.exp: Likewise.
* gdb.threads/non-ldr-exc-4.exp: Likewise.
Pedro Alves
Josh Stone
Jan Kratochvil
Joel Brobecker
Simon Marchi
Simon Marchi
Sandra Loosemore
Don Breazeal
Andrew Burgess
Yao Qi
Kevin Buettner
Jose E. Marchesi
Pierre-Marie de Rodat
Doug Evans