binutils-gdb.git
4 years agoEnable hardware breakpoints for gdbserver on Windows
Hannes Domani [Mon, 11 May 2020 17:18:31 +0000 (19:18 +0200)]
Enable hardware breakpoints for gdbserver on Windows

When trying to use hardware breakpoints with gdbserver you get this error:

(gdb) hbreak main
Hardware assisted breakpoint 2 at 0x40162d: file gdb-9493.c, line 5.
(gdb) c
Continuing.
Warning:
Cannot insert hardware breakpoint 2.
Could not insert hardware breakpoints:
You may have requested too many hardware breakpoints/watchpoints.

It turns out the respective types just needed to be added to the
appropriate callback functions, because x86_dr_(insert|remove)_watchpoint
already handles them.

gdbserver/ChangeLog:

2020-05-15  Hannes Domani  <ssbssa@yahoo.de>

* win32-i386-low.cc (i386_supports_z_point_type): Handle
Z_PACKET_HW_BP z_type.
(i386_insert_point): Handle raw_bkpt_type type.
(i386_remove_point): Likewise.

4 years agoFix tight loop on recursively-defined symbols
Alan Modra [Fri, 15 May 2020 08:36:05 +0000 (18:06 +0930)]
Fix tight loop on recursively-defined symbols

This patch fixes a bug in GAS where the assembler enters a tight loop
when attempting to resolve recursively-defined symbols, e.g. when
trying to assemble "a=a".

This is a regression introduced between binutils 2.32 and 2.33,
by commit 1903f1385bff9

* symbols.c (struct local_symbol): Update comment.
(resolve_symbol_value): For resolved symbols equated to other
symbols, verify that the referenced symbol is not a local_symbol
before accessing sy_value.  Don't leave symbol loops during
finalize_syms resolution.
* testsuite/gas/all/assign-bad-recursive.d: New test.
* testsuite/gas/all/assign-bad-recursive.l: Error output for test.
* testsuite/gas/all/assign-bad-recursive.s: Assembly for test.
* testsuite/gas/all/gas.exp: Run it.

4 years agoDisable record btrace bts support for AMD processors
Kevin Buettner [Thu, 14 May 2020 18:10:14 +0000 (11:10 -0700)]
Disable record btrace bts support for AMD processors

Some Intel processors implement a Branch Trace Store (BTS) which GDB
uses for reverse execution support via the "record btrace bts"
command.

I have been unable to find a description of a similar feature in a
recent (April 2020) AMD64 architecture reference:

    https://www.amd.com/system/files/TechDocs/40332.pdf

While it is the case that AMD processors have an LBR (last branch
record) bit in the DebugCtl MSR, it seems that it affects only four
MSRs when enabled.  The names of these MSRs are LastBranchToIP,
LastBranchFromIP, LastIntToIP, and LastIntFromIP.  I can find no
mention of anything more extensive.  While looking at an Intel
architecture document, I noticed that Intel's P6 family from the
mid-90s had registers of the same name.

Therefore...

This commit disables "record btrace bts" support in GDB for AMD
processors.

Using the test case from gdb.base/break.exp, the sessions
below show the expected behavior (run on a machine with an
Intel processor) versus that on a machine with an AMD processor.
The AMD processor in question is reported as follows by "lscpu":
AMD Ryzen Threadripper 2950X 16-Core Processor .  Finally, I'll
note that the AMD machine is actually a VM, but I see similar
behavior on both the virtualization host and the VM.

Intel machine - Desired behavior:

[kevinb@mohave gdb]$ ./gdb -q testsuite/outputs/gdb.base/break/break
Reading symbols from testsuite/outputs/gdb.base/break/break...
(gdb) start
Temporary breakpoint 1 at 0x401179: file /home/kevinb/sourceware-git/native-build/bld/../../binutils-gdb/gdb/testsuite/gdb.base/break.c, line 43.
Starting program: /home/kevinb/sourceware-git/native-build/bld/gdb/testsuite/outputs/gdb.base/break/break

Temporary breakpoint 1, main (argc=1, argv=0x7fffffffd748, envp=0x7fffffffd758)
    at /home/kevinb/sourceware-git/native-build/bld/../../binutils-gdb/gdb/testsuite/gdb.base/break.c:43
43     if (argc == 12345) {  /* an unlikely value < 2^16, in case uninited */ /* set breakpoint 6 here */
(gdb) record btrace
(gdb) b factorial
Breakpoint 2 at 0x40121b: file /home/kevinb/sourceware-git/native-build/bld/../../binutils-gdb/gdb/testsuite/gdb.base/break.c, line 63.
(gdb) c
Continuing.

Breakpoint 2, factorial (value=6)
    at /home/kevinb/sourceware-git/native-build/bld/../../binutils-gdb/gdb/testsuite/gdb.base/break.c:63
63   if (value > 1) {  /* set breakpoint 7 here */
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64kB.
Recorded 768 instructions in 22 functions (0 gaps) for thread 1 (process 19215).
(gdb) record function-call-history
13 do_lookup_x
14 _dl_lookup_symbol_x
15 _dl_fixup
16 _dl_runtime_resolve_xsavec
17 atoi
18 strtoq
19 ____strtoll_l_internal
20 atoi
21 main
22 factorial
(gdb) record instruction-history
759    0x00007ffff7ce0917 <____strtoll_l_internal+647>: pop    %r15
760    0x00007ffff7ce0919 <____strtoll_l_internal+649>: retq
761    0x00007ffff7cdd064 <atoi+20>: add    $0x8,%rsp
762    0x00007ffff7cdd068 <atoi+24>: retq
763    0x00000000004011b1 <main+75>: mov    %eax,%edi
764    0x00000000004011b3 <main+77>: callq  0x401210 <factorial>
765    0x0000000000401210 <factorial+0>: push   %rbp
766    0x0000000000401211 <factorial+1>: mov    %rsp,%rbp
767    0x0000000000401214 <factorial+4>: sub    $0x10,%rsp
768    0x0000000000401218 <factorial+8>: mov    %edi,-0x4(%rbp)

AMD machine - Wrong behavior:

[kev@f32-1 gdb]$ ./gdb -q testsuite/outputs/gdb.base/break/break
Reading symbols from testsuite/outputs/gdb.base/break/break...
(gdb) start
Temporary breakpoint 1 at 0x401179: file /ironwood1/sourceware-git/f32-master/bld/../../worktree-master/gdb/testsuite/gdb.base/break.c, line 43.
Starting program: /mesquite2/sourceware-git/f32-master/bld/gdb/testsuite/outputs/gdb.base/break/break

Temporary breakpoint 1, main (argc=1, argv=0x7fffffffd5b8, envp=0x7fffffffd5c8)
    at /ironwood1/sourceware-git/f32-master/bld/../../worktree-master/gdb/testsuite/gdb.base/break.c:43
43     if (argc == 12345) {  /* an unlikely value < 2^16, in case uninited */ /* set breakpoint 6 here */
(gdb) record btrace
(gdb) b factorial
Breakpoint 2 at 0x40121b: file /ironwood1/sourceware-git/f32-master/bld/../../worktree-master/gdb/testsuite/gdb.base/break.c, line 63.
(gdb) c
Continuing.

Breakpoint 2, factorial (value=6)
    at /ironwood1/sourceware-git/f32-master/bld/../../worktree-master/gdb/testsuite/gdb.base/break.c:63
63   if (value > 1) {  /* set breakpoint 7 here */
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64kB.
warning: Recorded trace may be incomplete at instruction 7737 (pc = 0x405000).
warning: Recorded trace may be incomplete at instruction 7739 (pc = 0x0).
Recorded 7740 instructions in 46 functions (2 gaps) for thread 1 (process 1402911).
(gdb) record function-call-history
37 ??
38 values
39 some_enum_global
40 ??
41 some_union_global
42 some_variable
43 ??
44 [decode error (2): unknown instruction]
45 ??
46 [decode error (2): unknown instruction]
(gdb) record instruction-history
7730    0x0000000000404ff3: add    %al,(%rax)
7731    0x0000000000404ff5: add    %al,(%rax)
7732    0x0000000000404ff7: add    %al,(%rax)
7733    0x0000000000404ff9: add    %al,(%rax)
7734    0x0000000000404ffb: add    %al,(%rax)
7735    0x0000000000404ffd: add    %al,(%rax)
7736    0x0000000000404fff: .byte 0x0
7737    0x0000000000405000: Cannot access memory at address 0x405000

Lastly, I'll note that I see a lot of gdb.btrace failures without
this commit.  Worse still, the results aren't always the same which
causes a lot of noise when comparing test results.

gdbsupport/ChangeLog:

* btrace-common.h (btrace_cpu_vendor): Add CV_AMD.

gdb/ChangeLog:

* nat/linux-btrace.c (btrace_this_cpu): Add check for AMD
processors.
(cpu_supports_bts): Add CV_AMD case.

4 years agogdb: infrun: consume multiple events at each pass in stop_all_threads
Laurent Morichetti [Thu, 14 May 2020 23:59:16 +0000 (19:59 -0400)]
gdb: infrun: consume multiple events at each pass in stop_all_threads

[Simon: I send this patch on behalf of Laurent Morichetti, I added the
 commit message and performance measurement stuff.

 Also, this patch is better viewed with "git show -w".]

stop_all_threads, in infrun.c, is used to stop all running threads on
targets that are always non-stop.  It's used, for example, when the
program hits a breakpoint while GDB is set to "non-stop off".  It sends
a stop request for each running thread, then collects one wait event for
each.

Since new threads can spawn while we are stopping the threads, it's
written in a way where it makes multiple such "send stop requests to
running threads & collect wait events" passes.  The function completes
when it has made two passes where it hasn't seen any running threads.

With the way it's written right now is, it iterates on the thread list,
sending a stop request for each running thread.  It then waits for a
single event, after which it iterates through the thread list again.  It
sends stop requests for any running threads that's been created since
the last iteration.  It then consumes another single wait event.

This makes it so we iterate on O(n^2) threads in total, where n is the
number of threads.  This patch changes the function to reduce it to
O(n).  This starts to have an impact when dealing with multiple
thousands of threads (see numbers below).  At each pass, we know the
number of outstanding stop requests we have sent, for which we need to
collect a stop event.  We can therefore loop to collect this many stop
events before proceeding to the next pass and iterate on the thread list
again.

To check the performance improvements with this patch, I made an
x86/Linux program with a large number of idle threads (varying from 1000
to 10000).  The program's main thread hits a breakpoint once all these
threads have started, which causes stop_all_threads to be called to stop
all these threads.  I measured (by patching stop_all_threads):

- the execution time of stop_all_threads
- the total number of threads we iterate on during the complete
  execution of the function (the total number of times we execute the
  "for (thread_info *t : all_non_exited_threads ())" loop)

These are the execution times, in milliseconds:

    # threads  before  after
         1000     226    106
         2000     997    919
         3000    3461   2323
         4000    4330   3570
         5000    8642   6600
         6000    9918   8039
         7000   12662  10930
         8000   16652  11222
         9000   21561  15875
        10000   26613  20019

Note that I very unscientifically executed each case only once.

These are the number of loop executions:

    # threads     before  after
         1000    1003002   3003
         2000    4006002   6003
         3000    9009002   9003
         4000   16012002  12003
         5000   25015002  15003
         6000   36018002  18003
         7000   49021002  21003
         8000   64024002  24003
         9000   81027002  27003
        10000  100030002  30003

This last table shows pretty well the O(n^2) vs O(n) behaviors.

Reg-tested on x86 GNU/Linux (Ubuntu 16.04).

gdb/ChangeLog:

YYYY-MM-DD  Laurent Morichetti  <Laurent.Morichetti@amd.com>
YYYY-MM-DD  Simon Marchi  <simon.marchi@efficios.com>

* infrun.c (stop_all_threads): Collect multiple wait events at
each pass.

4 years agogold: powerpc: Test whether sym is not a plugin in do_gc_mark_symbol
Nikita Ermakov [Thu, 14 May 2020 22:57:57 +0000 (08:27 +0930)]
gold: powerpc: Test whether sym is not a plugin in do_gc_mark_symbol

sym->object() could be either a Plugin or Powerpc_relobj. There could
be a situation when Pluginobj would be proccessed in
ppc_object->get_opd_ent(dst_off) as Powerpc_relobj and it leads to the
segmentation fault.

* powerpc.cc (do_gc_mark_symbol): Don't segfault on plugin symbols.

4 years agogdb: remove TYPE_CODE macro
Simon Marchi [Thu, 14 May 2020 17:46:38 +0000 (13:46 -0400)]
gdb: remove TYPE_CODE macro

Remove TYPE_CODE, changing all the call sites to use type::code
directly.  This is quite a big diff, but this was mostly done using sed
and coccinelle.  A few call sites were done by hand.

gdb/ChangeLog:

* gdbtypes.h (TYPE_CODE): Remove.  Change all call sites to use
type::code instead.

4 years agogdb: add type::code / type::set_code
Simon Marchi [Thu, 14 May 2020 17:45:40 +0000 (13:45 -0400)]
gdb: add type::code / type::set_code

Add the code and set_code methods on code, in order to remove the
TYPE_CODE macro.  In this patch, the TYPE_CODE macro is changed to use
type::code, so all the call sites that are used to set the type code are
changed to use type::set_code.  The next patch will remove TYPE_CODE
completely.

gdb/ChangeLog:

* gdbtypes.h (struct type) <code, set_code>: New methods.
(TYPE_CODE): Use type::code.  Change all call sites used to set
the code to use type::set_code instead.

4 years ago[gdb/testsuite] Fix gdb.fortran/nested-funcs-2.exp with gdbserver
Tom de Vries [Thu, 14 May 2020 15:24:49 +0000 (17:24 +0200)]
[gdb/testsuite] Fix gdb.fortran/nested-funcs-2.exp with gdbserver

When running test-case gdb.fortran/nested-funcs-2.exp with target board
native-gdbserver, we have:
...
(gdb) call contains_keyword::subroutine_to_call()^M
(gdb) FAIL: gdb.fortran/nested-funcs-2.exp: src_prefix=0: nest_prefix=1: \
  call contains_keyword::subroutine_to_call()
...

This is caused by the fact that we're trying to match inferior output using
gdb_test.

Fix this by using gdb_test_stdio instead.

Tested on x86_64-linux.

gdb/testsuite/ChangeLog:

2020-05-14  Tom de Vries  <tdevries@suse.de>

* gdb.fortran/nested-funcs-2.exp: Use gdb_test_stdio to test inferior
output.

4 years ago[gdb/testsuite] Split up multi-exec test-cases
Tom de Vries [Thu, 14 May 2020 15:24:49 +0000 (17:24 +0200)]
[gdb/testsuite] Split up multi-exec test-cases

With test-case gdb.base/align.exp and target board native-gdbserver, we run
into:
...
(gdb) file outputs/gdb.base/align/c/align^M
Reading symbols from outputs/gdb.base/align/c/align...^M
(gdb) delete breakpoints^M
(gdb) info breakpoints^M
No breakpoints or watchpoints.^M
(gdb) break main^M
Breakpoint 1 at 0x4004ab: file outputs/gdb.base/align/c/align.c, line 838.^M
(gdb) kill^M
The program is not being run.^M
(gdb) spawn gdbserver --once localhost:2592 outputs/gdb.base/align/align^M
Process outputs/gdb.base/align/align created; pid = 6946^M
Listening on port 2592^M
target remote localhost:2592^M
Remote debugging using localhost:2592^M
warning: Mismatch between current exec-file outputs/gdb.base/align/c/align^M
and automatically determined exec-file outputs/gdb.base/align/align^M
exec-file-mismatch handling is currently "ask"^M
Load new symbol table from "outputs/gdb.base/align/align"? (y or n) Quit^M
(gdb) ERROR: test suppressed
...

Fix this by turning this and similar test-cases into regular, single
executable test-cases.

This fixes 100+ FAILs with target board native-gdbserver.

Tested on x86_64-linux.

gdb/testsuite/ChangeLog:

2020-05-14  Tom de Vries  <tdevries@suse.de>

* gdb.base/align.exp: Split into ...
* gdb.base/align.exp.in: ...
* gdb.base/align-c++.exp: ...
* gdb.base/align-c.exp: ... these.
* gdb.base/infcall-nested-structs.exp: Split into ...
* gdb.base/infcall-nested-structs.exp.in: ...
* gdb.base/infcall-nested-structs-c++.exp: ...
* gdb.base/infcall-nested-structs-c.exp: ... these.
* gdb.base/info-types.exp: Split into ...
* gdb.base/info-types.exp.in: ...
* gdb.base/info-types-c++.exp: ...
* gdb.base/info-types-c.exp: ... these.
* gdb.base/max-depth.exp: Split into ...
* gdb.base/max-depth.exp.in: ...
* gdb.base/max-depth-c++.exp: ...
* gdb.base/max-depth-c.exp: ... these.
* gdb.cp/infcall-nodebug.exp: Split into ...
* gdb.cp/infcall-nodebug.exp.in: ...
* gdb.cp/infcall-nodebug-c++-d0.exp: ...
* gdb.cp/infcall-nodebug-c++-d1.exp: ...
* gdb.cp/infcall-nodebug-c-d0.exp: ...
* gdb.cp/infcall-nodebug-c-d1.exp: ... these.

4 years agogdb/infrun: handle already-exited threads when attempting to stop
Tankut Baris Aktemur [Thu, 14 May 2020 11:59:54 +0000 (13:59 +0200)]
gdb/infrun: handle already-exited threads when attempting to stop

In stop_all_threads, GDB sends signals to other threads in an attempt
to stop them.  While in a typical scenario the expected wait status is
TARGET_WAITKIND_STOPPED, it is possible that the thread GDB attempted
to stop has already terminated.  If so, a waitstatus other than
TARGET_WAITKIND_STOPPED would be received.  Handle this case
appropriately.

If a wait status that denotes thread termination is ignored, GDB goes
into an infinite loop in stop_all_threads.
E.g.:

  $ gdb ./a.out
  (gdb) start
  ...
  (gdb) add-inferior -exec ./a.out
  ...
  (gdb) inferior 2
  ...
  (gdb) start
  ...
  (gdb) set schedule-multiple on
  (gdb) set debug infrun 2
  (gdb) continue
  Continuing.
  infrun: clear_proceed_status_thread (process 10449)
  infrun: clear_proceed_status_thread (process 10453)
  infrun: proceed (addr=0xffffffffffffffff, signal=GDB_SIGNAL_DEFAULT)
  infrun: proceed: resuming process 10449
  infrun: resume (step=0, signal=GDB_SIGNAL_0), trap_expected=0, current thread [process 10449] at 0x55555555514e
  infrun: infrun_async(1)
  infrun: prepare_to_wait
  infrun: proceed: resuming process 10453
  infrun: resume (step=0, signal=GDB_SIGNAL_0), trap_expected=0, current thread [process 10453] at 0x55555555514e
  infrun: prepare_to_wait
  infrun: Found 2 inferiors, starting at #0
  infrun: target_wait (-1.0.0, status) =
  infrun:   10449.10449.0 [process 10449],
  infrun:   status->kind = exited, status = 0
  infrun: handle_inferior_event status->kind = exited, status = 0
  [Inferior 1 (process 10449) exited normally]
  infrun: stop_waiting
  infrun: stop_all_threads
  infrun: stop_all_threads, pass=0, iterations=0
  infrun:   process 10453 executing, need stop
  infrun: target_wait (-1.0.0, status) =
  infrun:   10453.10453.0 [process 10453],
  infrun:   status->kind = exited, status = 0
  infrun: stop_all_threads status->kind = exited, status = 0 process 10453
  infrun:   process 10453 executing, already stopping
  infrun: target_wait (-1.0.0, status) =
  infrun:   -1.0.0 [process -1],
  infrun:   status->kind = no-resumed
  infrun: infrun_async(0)
  infrun: stop_all_threads status->kind = no-resumed process -1
  infrun:   process 10453 executing, already stopping
  infrun: stop_all_threads status->kind = no-resumed process -1
  infrun:   process 10453 executing, already stopping
  infrun: stop_all_threads status->kind = no-resumed process -1
  infrun:   process 10453 executing, already stopping
  infrun: stop_all_threads status->kind = no-resumed process -1
  infrun:   process 10453 executing, already stopping
  infrun: stop_all_threads status->kind = no-resumed process -1
  infrun:   process 10453 executing, already stopping
  infrun: stop_all_threads status->kind = no-resumed process -1
  infrun:   process 10453 executing, already stopping
  infrun: stop_all_threads status->kind = no-resumed process -1
  infrun:   process 10453 executing, already stopping
  infrun: stop_all_threads status->kind = no-resumed process -1
  infrun:   process 10453 executing, already stopping
  infrun: stop_all_threads status->kind = no-resumed process -1
  infrun:   process 10453 executing, already stopping
  infrun: stop_all_threads status->kind = no-resumed process -1
  infrun:   process 10453 executing, already stopping
  ...

And this polling goes on forever.  This patch prevents the infinite
looping behavior.  For the same scenario above, we obtain the
following behavior:

  ...
  (gdb) continue
  Continuing.
  infrun: clear_proceed_status_thread (process 31229)
  infrun: clear_proceed_status_thread (process 31233)
  infrun: proceed (addr=0xffffffffffffffff, signal=GDB_SIGNAL_DEFAULT)
  infrun: proceed: resuming process 31229
  infrun: resume (step=0, signal=GDB_SIGNAL_0), trap_expected=0, current thread [process 31229] at 0x55555555514e
  infrun: infrun_async(1)
  infrun: prepare_to_wait
  infrun: proceed: resuming process 31233
  infrun: resume (step=0, signal=GDB_SIGNAL_0), trap_expected=0, current thread [process 31233] at 0x55555555514e
  infrun: prepare_to_wait
  infrun: Found 2 inferiors, starting at #0
  infrun: target_wait (-1.0.0, status) =
  infrun:   31229.31229.0 [process 31229],
  infrun:   status->kind = exited, status = 0
  infrun: handle_inferior_event status->kind = exited, status = 0
  [Inferior 1 (process 31229) exited normally]
  infrun: stop_waiting
  infrun: stop_all_threads
  infrun: stop_all_threads, pass=0, iterations=0
  infrun:   process 31233 executing, need stop
  infrun: target_wait (-1.0.0, status) =
  infrun:   31233.31233.0 [process 31233],
  infrun:   status->kind = exited, status = 0
  infrun: stop_all_threads status->kind = exited, status = 0 process 31233
  infrun: saving status status->kind = exited, status = 0 for 31233.31233.0
  infrun:   process 31233 not executing
  infrun: stop_all_threads, pass=1, iterations=1
  infrun:   process 31233 not executing
  infrun: stop_all_threads done
  (gdb)

The exit event from Inferior 1 is received and shown to the user.
The exit event from Inferior 2 is not displayed, but kept pending.

  (gdb) info inferiors
    Num  Description       Connection           Executable
  * 1    <null>                                 a.out
    2    process 31233     1 (native)           a.out
  (gdb) inferior 2
  [Switching to inferior 2 [process 31233] (a.out)]
  [Switching to thread 2.1 (process 31233)]
  Couldn't get registers: No such process.
  (gdb) continue
  Continuing.
  infrun: clear_proceed_status_thread (process 31233)
  infrun: clear_proceed_status_thread: thread process 31233 has pending wait status status->kind = exited, status = 0 (currently_stepping=0).
  infrun: proceed (addr=0xffffffffffffffff, signal=GDB_SIGNAL_DEFAULT)
  infrun: proceed: resuming process 31233
  infrun: resume: thread process 31233 has pending wait status status->kind = exited, status = 0 (currently_stepping=0).
  infrun: prepare_to_wait
  infrun: Using pending wait status status->kind = exited, status = 0 for process 31233.
  infrun: target_wait (-1.0.0, status) =
  infrun:   31233.31233.0 [process 31233],
  infrun:   status->kind = exited, status = 0
  infrun: handle_inferior_event status->kind = exited, status = 0
  [Inferior 2 (process 31233) exited normally]
  infrun: stop_waiting
  (gdb) info inferiors
    Num  Description       Connection           Executable
    1    <null>                                 a.out
  * 2    <null>                                 a.out
  (gdb)

When a process exits and we leave the process exit event pending, we
need to make sure that at least one thread is left listed in the
inferior's thread list.  This is necessary in order to make sure we
have a thread that we can later resume, so the process exit event can
be collected/reported.

When native debugging, the GNU/Linux back end already makes sure that
the last LWP isn't deleted.

When remote debugging against GNU/Linux GDBserver, the GNU/Linux
GDBserver backend also makes sure that the last thread isn't deleted
until the process exit event is reported to GDBserver core.

However, between the backend reporting the process exit event to
GDBserver core, and GDB consuming the event, GDB may update the thread
list and find no thread left in the process.  The process exit event
will be pending somewhere in GDBserver's stop reply queue, or
gdb/remote.c's queue, or whathever other event queue inbetween
GDBserver and infrun.c's handle_inferior_event.

This patch tweaks remote.c's target_update_thread_list implementation
to avoid deleting the last thread of an inferior.

In the past, this case of inferior-with-no-threads led to a special
case at the bottom of handle_no_resumed, where it reads:

  /* Note however that we may find no resumed thread because the whole
     process exited meanwhile (thus updating the thread list results
     in an empty thread list).  In this case we know we'll be getting
     a process exit event shortly.  */
  for (inferior *inf : all_non_exited_inferiors (ecs->target))

In current master, that code path is still reachable with the
gdb.threads/continue-pending-after-query.exp testcase, when tested
against GDBserver, with "maint set target-non-stop" forced "on".

With this patch, the scenario that loop was concerned about is still
properly handled, because the loop above it finds the process's last
thread with "executing" set to true, and thus the handle_no_resumed
function still returns true.

Since GNU/Linux native and remote are the only targets that support
non-stop mode, and with this patch, we always make sure the inferior
has at least one thread, this patch also removes that "inferior with
no threads" special case handling from handle_no_resumed.

Since remote.c now has a special case where we treat a thread that has
already exited as if it was still alive, we might need to tweak
remote.c's target_thread_alive implementation to return true for that
thread without querying the remote side (which would say "no, not
alive").  After inspecting all the target_thread_alive calls in the
codebase, it seems that only the one from prune_threads could result
in that thread being accidentally deleted.  There's only one call to
prune_threads in GDB's common code, so this patch handles this by
replacing the prune_threads call with a delete_exited_threads call.
This seems like an improvement anyway, because we'll still be doing
what the comment suggests we want to do, and, we avoid remote protocol
traffic.

Regression-tested on X86_64 Linux.

gdb/ChangeLog:
2020-05-14  Tankut Baris Aktemur  <tankut.baris.aktemur@intel.com>
    Tom de Vries  <tdevries@suse.de>
    Pedro Alves  <palves@redhat.com>

PR threads/25478
* infrun.c (stop_all_threads): Do NOT ignore
TARGET_WAITKIND_NO_RESUMED, TARGET_WAITKIND_THREAD_EXITED,
TARGET_WAITKIND_EXITED, TARGET_WAITKIND_SIGNALLED wait statuses
received.
(handle_no_resumed): Remove code handling a live inferior with no
threads.
* remote.c (has_single_non_exited_thread): New.
(remote_target::update_thread_list): Do not delete a thread if is
the last thread of the process.
* thread.c (thread_select): Call delete_exited_threads instead of
prune_threads.

gdb/testsuite/ChangeLog:
2020-05-14  Tankut Baris Aktemur  <tankut.baris.aktemur@intel.com>
    Pedro Alves  <palves@redhat.com>

* gdb.multi/multi-exit.c: New file.
* gdb.multi/multi-exit.exp: New file.
* gdb.multi/multi-kill.c: New file.
* gdb.multi/multi-kill.exp: New file.

4 years agogdb/infrun: enable/disable thread events of all targets in stop_all_threads
Tankut Baris Aktemur [Thu, 14 May 2020 11:59:54 +0000 (13:59 +0200)]
gdb/infrun: enable/disable thread events of all targets in stop_all_threads

In stop_all_threads, the thread events of the current top target are
enabled at the beginning of the function and then disabled at the end
(at scope exit time).  Because there may be multiple targets whose
thread lists will be updated and whose threads are stopped,
enable/disable thread events for all targets.

This update caused a change in the annotations.  In particular, a
"frames-invalid" annotation is printed one more time due to switching
the current inferior.  Hence, gdb.base/annota1.exp and
gdb.cp/annota2.exp tests are also updated.

Regression-tested on X86_64 Linux using the default board file and the
native-extended-gdbserver board file.

gdb/ChangeLog:
2020-05-14  Tankut Baris Aktemur  <tankut.baris.aktemur@intel.com>

* infrun.c (stop_all_threads): Enable/disable thread events of all
targets.  Move a debug message denoting the end of the function
into the SCOPED_EXIT block.

gdb/testsuite/ChangeLog:
2020-05-14  Tankut Baris Aktemur  <tankut.baris.aktemur@intel.com>

* gdb.base/annota1.exp: Update the expected output.
* gdb.cp/annota2.exp: Ditto.

4 years agogdb: introduce 'all_non_exited_process_targets' and 'switch_to_target_no_thread'
Tankut Baris Aktemur [Thu, 14 May 2020 11:59:54 +0000 (13:59 +0200)]
gdb: introduce 'all_non_exited_process_targets' and 'switch_to_target_no_thread'

Introduce two new convenience functions:

1. all_non_exited_process_targets: returns a collection of all process
stratum targets that have non-exited inferiors on them.  Useful for
iterating targets.

2. switch_to_target_no_thread: switch the context to the first
inferior of the given target, and to no selected thread.

gdb/ChangeLog:
2020-05-14  Tankut Baris Aktemur  <tankut.baris.aktemur@intel.com>

* process-stratum-target.h: Include <set>.
(all_non_exited_process_targets, switch_to_target_no_thread): New
function declarations.
* process-stratum-target.c (all_non_exited_process_targets)
(switch_to_target_no_thread): New function implementations.

4 years agogdb/infrun: extract out a code piece into 'mark_non_executing_threads' function
Tankut Baris Aktemur [Thu, 14 May 2020 11:59:53 +0000 (13:59 +0200)]
gdb/infrun: extract out a code piece into 'mark_non_executing_threads' function

This is a refactoring.  The extracted function is placed deliberately
before 'stop_all_threads' because the function will be re-used there
in a subsequent patch for handling an exit status kind received from
a thread that GDB attempted to stop.

gdb/ChangeLog:
2020-05-14  Tankut Baris Aktemur  <tankut.baris.aktemur@intel.com>

* infrun.c (handle_inferior_event): Extract out a piece of code
into...
(mark_non_executing_threads): ...this new function.

Change-Id: I2b088f4a724f4260cb37068264964525cf62a118

4 years agogdb/infrun: move a 'regcache_read_pc' call down to first use
Tankut Baris Aktemur [Thu, 14 May 2020 11:59:53 +0000 (13:59 +0200)]
gdb/infrun: move a 'regcache_read_pc' call down to first use

In infrun.c's resume_1 function, move the definition of the local
variable PC down to its first use.  This is useful if the thread we want
to resume is already gone with a pending exit event, because we avoid
the error we would see otherwise when trying to read the PC.

gdb/ChangeLog:
2020-05-14  Tankut Baris Aktemur  <tankut.baris.aktemur@intel.com>

* infrun.c (resume_1): Move a 'regcache_read_pc' call down to first
use.

4 years agogdb: protect some 'regcache_read_pc' calls
Tankut Baris Aktemur [Thu, 14 May 2020 11:59:53 +0000 (13:59 +0200)]
gdb: protect some 'regcache_read_pc' calls

It possible that a thread whose PC we attempt to read is already dead.
In this case, 'regcache_read_pc' errors out.  This impacts the
"proceed" execution flow, where GDB quits early before having a chance
to check if there exists a pending event.  To remedy, keep going with
a 0 value for the PC if 'regcache_read_pc' fails.  Because the value
of PC before resuming a thread is mostly used for storing and checking
the next time the thread stops, this tolerance is expected to be
harmless for a dead thread/process.

gdb/ChangeLog:
2020-05-14  Tankut Baris Aktemur  <tankut.baris.aktemur@intel.com>

* regcache.c (regcache_read_pc_protected): New function
implementation that returns 0 if the PC cannot read via
'regcache_read_pc'.
* infrun.c (proceed): Call 'regcache_read_pc_protected'
instead of 'regcache_read_pc'.
(keep_going_pass_signal): Ditto.

gdbsupport/ChangeLog:
2020-05-14  Tankut Baris Aktemur  <tankut.baris.aktemur@intel.com>

* common-regcache.h (regcache_read_pc_protected): New function
declaration.

4 years agoUpdate Swedish translation for the gas sub-directory and a new Serbian translation...
Nick Clifton [Thu, 14 May 2020 10:26:26 +0000 (11:26 +0100)]
Update Swedish translation for the gas sub-directory and a new Serbian translation for the gold sub-directory.

4 years agoRISC-V: Add elfNN_riscv_mkobject to initialize RISC-V tdata.
Nelson Chu [Wed, 13 May 2020 08:05:45 +0000 (16:05 +0800)]
RISC-V: Add elfNN_riscv_mkobject to initialize RISC-V tdata.

For now we only have one char pointer in RISC-V tdata, so it should be fine.
But once we need more elements in tdata, then we may get some uninitialize
or unexpected values.  I do meet the same problem when extending the RISC-V
tdata.

bfd/
elfnn-riscv.c (elfNN_riscv_mkobject):  New function.  We need this
to initialize RISC-V tdata.

4 years agoAutomatic date update in version.in
GDB Administrator [Thu, 14 May 2020 00:00:16 +0000 (00:00 +0000)]
Automatic date update in version.in

4 years agoRemove ada-lang.c:align_value
Tom Tromey [Wed, 13 May 2020 19:15:13 +0000 (13:15 -0600)]
Remove ada-lang.c:align_value

I recently noticed the align_value function in ada-lang.c.  This can
be removed, in favor of align_up from gdbsupport.

gdb/ChangeLog
2020-05-13  Tom Tromey  <tromey@adacore.com>

* ada-lang.c (align_value): Remove.
(ada_template_to_fixed_record_type_1): Use align_up.

4 years agogdb: update the copyright year in async-event.[ch]
Tankut Baris Aktemur [Wed, 13 May 2020 12:53:37 +0000 (14:53 +0200)]
gdb: update the copyright year in async-event.[ch]

The async-event.[ch] files were introduced recently as a result of
splitting the event-loop.  I believe the copyright year update was
just an oversight.  So, this patch fixes that.

gdb/ChangeLog:
2020-05-13  Tankut Baris Aktemur  <tankut.baris.aktemur@intel.com>

* async-event.c: Update the copyright year.
* async-event.h: Update the copyright year.

4 years agoHave the linker's help text include the default setting of the --hash-style option...
Nick Clifton [Wed, 13 May 2020 09:59:02 +0000 (10:59 +0100)]
Have the linker's help text include the default setting of the --hash-style option, if relevent.

PR 25979
* lexsup.c (elf_shlib_list_options): Include the default value for
the hash style in the output text.

4 years agoSync config and libiberty with GCC
H.J. Lu [Wed, 13 May 2020 01:37:03 +0000 (18:37 -0700)]
Sync config and libiberty with GCC

config/

PR bootstrap/94998
* cet.m4 (GCC_CET_HOST_FLAGS): Enable CET in cross compiler if
possible.

libiberty/

PR bootstrap/94998
* configure: Regenerated.

4 years agoAutomatic date update in version.in
GDB Administrator [Wed, 13 May 2020 00:00:18 +0000 (00:00 +0000)]
Automatic date update in version.in

4 years agogdb/testsuite: Disable path and duplicate checks when parallel testing
Andrew Burgess [Tue, 12 May 2020 16:38:17 +0000 (17:38 +0100)]
gdb/testsuite: Disable path and duplicate checks when parallel testing

This commit disables the recently added checking for paths in test
names, and for duplicate test names, when the gdb tests are run in
parallel.

When running the gdb tests in parallel the extra result count lines
produced cause the dg-extract-results scripts to exit with an error.

The patches for the dg-extract-results scripts have been posted to the
gcc-patches mailing list here:

https://gcc.gnu.org/pipermail/gcc-patches/2020-May/545562.html

Once they are merged there then these changes can be merged over to
binutils-gdb, and this commit can be reverted.

gdb/testsuite/ChangeLog:

* lib/check-test-names.exp: Disable when testing is being run in
parallel.

4 years agogdb: make two objfile functions return bool
Simon Marchi [Tue, 12 May 2020 15:17:01 +0000 (11:17 -0400)]
gdb: make two objfile functions return bool

gdb/ChangeLog:

* objfiles.h (is_addr_in_objfile,
shared_objfile_contains_address_p): Return bool.
* objfile.c (is_addr_in_objfile,
shared_objfile_contains_address_p): Return bool.

4 years ago[gdb/testsuite] Fix incorrect string concat in jit-elf.exp
Tom de Vries [Tue, 12 May 2020 12:59:01 +0000 (14:59 +0200)]
[gdb/testsuite] Fix incorrect string concat in jit-elf.exp

When running test-case gdb.base/jit-elf.exp with target board
cc-with-gdb-index, we get:
...
spawn -ignore SIGHUP gdb/contrib/cc-with-tweaks.sh -i gcc \
  -fno-stack-protector src/gdb/testsuite/gdb.base/jit-elf-main.c \
  -fdiagnostics-color=never -DATTACH=1 -DLOAD_ADDRESS=0x7000000 \
  -DLOAD_INCREMENT=0x1000000 -g -lm \
  -o outputs/gdb.base/jit-elf/jit-elf-main"-attach"^M
outputs/gdb.base/jit-elf/.tmp/jit-elf-main-attach: \
  No such file or directory.^M
output is:
outputs/gdb.base/jit-elf/.tmp/jit-elf-main-attach: \
  No such file or directory.^M

gdb compile failed, outputs/gdb.base/jit-elf/.tmp/jit-elf-main-attach: \
  No such file or directory.
UNTESTED: gdb.base/jit-elf.exp: failed to compile jit-elf-main"-attach"
...

The problem is a string concat in jit-elf.exp:
...
  ${main_binfile}"-attach"
...
which is intended to generate string 'jit-elf-main-attach' but instead
generates string 'jit-elf-main"-attach"'.

Fix this by using "${main_binfile}-attach" instead.

Tested on x86_64-linux.

gdb/testsuite/ChangeLog:

2020-05-12  Tom de Vries  <tdevries@suse.de>

* gdb.base/jit-elf.exp: Fix string concat.

4 years ago[gdb/testsuite] Fix tcl error in jit-elf-helpers.exp
Tom de Vries [Tue, 12 May 2020 12:41:47 +0000 (14:41 +0200)]
[gdb/testsuite] Fix tcl error in jit-elf-helpers.exp

When running test-case jit-elf.exp with target board cc-with-gdb-index, I run
into:
...
gdb compile failed, outputs/gdb.base/jit-elf/.tmp/jit-elf-main-attach: \
  No such file or directory.
ERROR: tcl error sourcing src/gdb/testsuite/gdb.base/jit-elf.exp.
ERROR: can't read "main_basename": no such variable
    while executing
"untested "failed to compile ${main_basename}.c""
    (procedure "compile_jit_main" line 7)
...

The problem is in compile_jit_main in lib/jit-elf-helpers.exp, where we try to
emit an untested message using global variable main_basename.c.

Fixing this by declaring the variable global results in duplicate test-names,
because the same source file is compiled more than once.

Instead, fix this by using the result name in the untested message.

Tested on x86_64-linux.

gdb/testsuite/ChangeLog:

2020-05-12  Tom de Vries  <tdevries@suse.de>

* lib/jit-elf-helpers.exp: Don't use undefined variables in untested
messages.

4 years ago [PATCH] bfd: Fix 64-bit relocation handling for a.out
Gunther Nikl [Tue, 12 May 2020 11:18:09 +0000 (12:18 +0100)]
 [PATCH] bfd: Fix 64-bit relocation handling for a.out

* aoutx.h (NAME (aout, swap_std_reloc_out)): Reject an unsupported
relocation size.

4 years ago[gdb/testsuite] Fix duplicate test-names in gdb.multi
Tom de Vries [Tue, 12 May 2020 09:18:14 +0000 (11:18 +0200)]
[gdb/testsuite] Fix duplicate test-names in gdb.multi

In gdb.multi we have:
...
DUPLICATE: gdb.multi/multi-term-settings.exp: \
  inf1_how=run: inf2_how=run: info inferiors
DUPLICATE: gdb.multi/multi-term-settings.exp: \
  inf1_how=run: inf2_how=attach: info inferiors
DUPLICATE: gdb.multi/multi-term-settings.exp: \
  inf1_how=run: inf2_how=tty: info inferiors
DUPLICATE: gdb.multi/multi-term-settings.exp: \
  inf1_how=attach: inf2_how=run: info inferiors
DUPLICATE: gdb.multi/multi-term-settings.exp: \
  inf1_how=attach: inf2_how=attach: attach
DUPLICATE: gdb.multi/multi-term-settings.exp: \
  inf1_how=attach: inf2_how=attach: info inferiors
DUPLICATE: gdb.multi/multi-term-settings.exp: \
  inf1_how=attach: inf2_how=tty: info inferiors
DUPLICATE: gdb.multi/multi-term-settings.exp: \
  inf1_how=tty: inf2_how=run: info inferiors
DUPLICATE: gdb.multi/multi-term-settings.exp: \
  inf1_how=tty: inf2_how=attach: info inferiors
DUPLICATE: gdb.multi/multi-term-settings.exp: \
  inf1_how=tty: inf2_how=tty: tty TTY
DUPLICATE: gdb.multi/multi-term-settings.exp: \
  inf1_how=tty: inf2_how=tty: info inferiors
...

Fix these using with_test_prefix.

Tested on x86_64-linux.

gdb/testsuite/ChangeLog:

2020-05-12  Tom de Vries  <tdevries@suse.de>

* gdb.multi/multi-term-settings.exp: Use with_test_prefix.

4 years ago[gdb/testsuite] Fix duplicate test-names in gdb.ada
Tom de Vries [Tue, 12 May 2020 09:05:44 +0000 (11:05 +0200)]
[gdb/testsuite] Fix duplicate test-names in gdb.ada

In gdb.ada we have these duplicate test-names:
...
DUPLICATE: gdb.ada/catch_ex.exp: continuing to program completion
DUPLICATE: gdb.ada/mi_catch_ex.exp: breakpoint at main
DUPLICATE: gdb.ada/mi_catch_ex.exp: mi runto main
DUPLICATE: gdb.ada/mi_catch_ex_hand.exp: breakpoint at main
DUPLICATE: gdb.ada/mi_catch_ex_hand.exp: mi runto main
...

Fix these using with_test_prefix.

Tested on x86_64-linux.

gdb/testsuite/ChangeLog:

2020-05-12  Tom de Vries  <tdevries@suse.de>

* gdb.ada/catch_ex.exp: Use with_test_prefix.
* gdb.ada/mi_catch_ex.exp: Same.
* gdb.ada/mi_catch_ex_hand.exp: Same.

4 years ago[gdb/testsuite] Fix duplicate test-names in gdb.fortran
Tom de Vries [Tue, 12 May 2020 08:53:47 +0000 (10:53 +0200)]
[gdb/testsuite] Fix duplicate test-names in gdb.fortran

In gdb.fortran we have:
...
DUPLICATE: gdb.fortran/complex.exp: whatis $
DUPLICATE: gdb.fortran/complex.exp: whatis $
DUPLICATE: gdb.fortran/complex.exp: whatis $
DUPLICATE: gdb.fortran/complex.exp: whatis $
...

Fix this by using with_test_prefix.

Tested on x86_64-linux.

gdb/testsuite/ChangeLog:

2020-05-12  Tom de Vries  <tdevries@suse.de>

* gdb.fortran/complex.exp: Use with_test_prefix.

4 years ago[gdb/testsuite] Fix duplicate test-names in gdb.trace
Tom de Vries [Tue, 12 May 2020 08:45:20 +0000 (10:45 +0200)]
[gdb/testsuite] Fix duplicate test-names in gdb.trace

In gdb.trace we have these duplicates:
...
DUPLICATE: gdb.trace/passcount.exp: 4.20a: set all three passcounts to three
DUPLICATE: gdb.trace/passcount.exp: 4.6: set passcount to zero
DUPLICATE: gdb.trace/passcount.exp: 4.7: set passcount to large number (32767)
...

Fix these by fixing the test-names.

Tested on x86_64-linux.

gdb/testsuite/ChangeLog:

2020-05-12  Tom de Vries  <tdevries@suse.de>

* gdb.trace/passcount.exp: Fix test-names.

4 years ago[gdb/testsuite] Fix duplicate test-names in gdb.pascal
Tom de Vries [Tue, 12 May 2020 08:37:04 +0000 (10:37 +0200)]
[gdb/testsuite] Fix duplicate test-names in gdb.pascal

In gdb.pascal we have these duplicates:
...
DUPLICATE: gdb.pascal/gdb11492.exp: next
DUPLICATE: gdb.pascal/gdb11492.exp: print char_array
...

Fix these by using with_test_prefix.

Tested on x86_64-linux.

gdb/testsuite/ChangeLog:

2020-05-12  Tom de Vries  <tdevries@suse.de>

* gdb.pascal/gdb11492.exp: Use with_test_prefix.

4 years ago[gdb/testsuite] Fix duplicate test-names in gdb.{gdb,opt,xml}
Tom de Vries [Tue, 12 May 2020 08:28:44 +0000 (10:28 +0200)]
[gdb/testsuite] Fix duplicate test-names in gdb.{gdb,opt,xml}

There are 3 test directories with one duplicate test-name: gdb.gdb, gdb.opt
and gdb.xml.  The duplicates are:
...
DUPLICATE: gdb.gdb/complaints.exp: call complaint_internal ($cstr)
DUPLICATE: gdb.opt/inline-locals.exp: info locals above bar 2 \
  (PRMS: gdb/25695)
DUPLICATE: gdb.xml/tdesc-regs.exp: ptype $extrareg
...

Fix as appropriate.

Tested on x86_64-linux.

gdb/testsuite/ChangeLog:

2020-05-12  Tom de Vries  <tdevries@suse.de>

* gdb.gdb/complaints.exp: Use with_test_prefix.
* gdb.xml/tdesc-regs.exp: Same.
* gdb.opt/inline-locals.exp: Fix test name.

4 years ago[gdb/testsuite] add jit-elf-util.h and run jit function
Mihails Strasuns [Tue, 18 Feb 2020 11:30:54 +0000 (12:30 +0100)]
[gdb/testsuite] add jit-elf-util.h and run jit function

Splits ELF related symbols into a separate jit-elf-util.h header and
enhances it with a few more.

Intention is to make adding new JIT tests possible without repeating
most of the common boilerplate.

As a test enhancement, jit-elf-main.c now calls the renamed function
after registering the jit object and ensures it returns an expected
result.

gdb/testsuite/ChangeLog:

2020-02-18  Mihails Strasuns  <mihails.strasuns@intel.com>

* gdb.base/jit-elf-util.h: New header file.
* gdb.base/jit-elf-main.c: Use jit-elf-util.h, add a call to
  the renamed JIT function to verify its result.

4 years ago[gdb/testsuite] define jit function name via macro
Mihails Strasuns [Fri, 27 Mar 2020 10:21:01 +0000 (11:21 +0100)]
[gdb/testsuite] define jit function name via macro

Replaces previous approach with patching resulting ELF binary after
loading - now that each test iteration works on a separately compiled
binary it is not necessary anymore.

Tests are still being ran without debug info to preserve original test
functionality but this change opens up the possibility to enable debug
info if needed too.

gdb/testsuite/ChangeLog:

2020-03-27  Mihails Strasuns  <mihails.strasuns@intel.com>

* lib/jit-elf-helpers.exp: Supply -DFUNCTION_NAME macro
  definition when compiling jit-elf-solib.co.
* gdb.base/jit-elf-main.c: Stop patching jit function name.
* gdb.base/jit-elf-solib.c: Use FUNCTION_NAME macro value as a
  function name.

4 years ago[gdb/testsuite] use -Ttext-segment for jit-elf tests
Mihails Strasuns [Mon, 17 Feb 2020 10:36:47 +0000 (11:36 +0100)]
[gdb/testsuite] use -Ttext-segment for jit-elf tests

Removes the need to manually relocate loaded ELF binary by using a fixed
constant as both mmap base address and as a requested first segment
address supplied to the linker.

In future will enable JIT tests with a valid DWARF debug info.  Current
tests still need to compile without a debug info though, because they do
a function name modification.

gdb/testsuite/ChangeLog:

2020-02-18  Mihails Strasuns  <mihails.strasuns@intel.com>

* lib/jit-elf-helpers.exp: Supply -Ttext-segment linker flag and
  define LOAD_ADDRESS/LOAD_INCREMENT macros for the compiled binaries.
* gdb.base/jit-elf-main.c: Use LOAD_ADDRESS/LOAD_INCREMENT to
  calculate the mmap address.

4 years ago[gdb/testsuite] add lib/jit-elf-helpers.exp
Mihails Strasuns [Mon, 17 Feb 2020 10:24:14 +0000 (11:24 +0100)]
[gdb/testsuite] add lib/jit-elf-helpers.exp

New utility library to be used by jit-elf tests responsible for
compiling binary artifacts. In the next commit the compilation process
will become more complicated because of extra mandatory flag - keeping
it in one place will make tests less fragile.

gdb/testsuite/ChangeLog:

2020-02-18  Mihails Strasuns  <mihails.strasuns@intel.com>

* lib/jit-elf-helpers.exp: New file.
* gdb.base/jit-elf.exp: Updated to use jit-elf-helpers.exp.
* gdb.base/jit-elf-so.exp: Updated to use jit-elf-helpers.exp.

4 years ago[gdb/testsuite] use args as lib list for jit-elf tests
Mihails Strasuns via Gdb-patches [Tue, 31 Mar 2020 17:13:51 +0000 (19:13 +0200)]
[gdb/testsuite] use args as lib list for jit-elf tests

Old usage: jit-elf-main lib.so 2
New usage: jit-elf-main lib.so.1 lib.so.2

Refactoring necessary to support running tests over multiple jit
binaries rather than mapping the same binary muultiple times.

gdb/testsuite/ChangeLog:

2020-02-18  Mihails Strasuns  <mihails.strasuns@intel.com>

* gdb.base/jit-elf-main.c: Read lib list from argc/argv.
* gdb.base/jit-elf.exp: Compile N jit libraries and use the list.
* gdb.base/jit-elf-so.exp: Ditto.

4 years ago[gdb/testsuite] Fix duplicate test-names in gdb.dwarf2
Tom de Vries [Tue, 12 May 2020 07:47:15 +0000 (09:47 +0200)]
[gdb/testsuite] Fix duplicate test-names in gdb.dwarf2

We currently have these duplicate test-names in gdb.dwarf2:
...
$ grep ^DUPLICATE: gdb.sum
DUPLICATE: gdb.dwarf2/comp-unit-lang.exp: show language
DUPLICATE: gdb.dwarf2/data-loc.exp: get integer valueof "sizeof (int)"
DUPLICATE: gdb.dwarf2/data-loc.exp: get integer valueof "sizeof (void *)"
DUPLICATE: gdb.dwarf2/data-loc.exp: get integer valueof "sizeof (int)"
DUPLICATE: gdb.dwarf2/data-loc.exp: get integer valueof "sizeof (int)"
DUPLICATE: gdb.dwarf2/data-loc.exp: ptype foo.array_type
DUPLICATE: gdb.dwarf2/varval.exp: get integer valueof "sizeof (int)"
DUPLICATE: gdb.dwarf2/varval.exp: get integer valueof "sizeof (void *)"
DUPLICATE: gdb.dwarf2/implref-struct.exp: print-object=off: \
  set print object off
DUPLICATE: gdb.dwarf2/implref-struct.exp: print-object=on: \
  set print object on
DUPLICATE: gdb.dwarf2/dw2-bad-parameter-type.exp: ptype f
...

Fix as appropriate.

Tested on x86_64-linux.

gdb/testsuite/ChangeLog:

2020-05-12  Tom de Vries  <tdevries@suse.de>

* gdb.dwarf2/comp-unit-lang.exp: Use with_test_prefix.
* gdb.dwarf2/dw2-bad-parameter-type.exp: Same.
* gdb.dwarf2/implref-struct.exp: Same.
* gdb.dwarf2/varval.exp: Ensure get_sizeof is called once per type.
* gdb.dwarf2/data-loc.exp: Same.  Remove duplicate test.

4 years agogdb: change duplicate test name in gdb.base/jit-so.exp
Simon Marchi [Tue, 12 May 2020 00:10:35 +0000 (20:10 -0400)]
gdb: change duplicate test name in gdb.base/jit-so.exp

When running gdb.base/jit-so.exp, we see duplicate test names:

$ grep PASS testsuite/gdb.sum | sort | uniq -c | sort -n
      ...
      2 PASS: gdb.base/jit-so.exp: one_jit_test-1: info function jit_function
      2 PASS: gdb.base/jit-so.exp: one_jit_test-2: info function jit_function

Give an explicit name to one test to avoid this.

gdb/testsuite/ChangeLog:

* gdb.base/jit-so.exp (one_jit_test): Change test name.

4 years agoAutomatic date update in version.in
GDB Administrator [Tue, 12 May 2020 00:00:11 +0000 (00:00 +0000)]
Automatic date update in version.in

4 years agoRegen ld/Makefile.in
Alan Modra [Mon, 11 May 2020 23:48:06 +0000 (09:18 +0930)]
Regen ld/Makefile.in

Missed from c578f16ef18fd.

4 years agoRestore info_command and breakpoint
Tom Tromey [Mon, 11 May 2020 21:28:12 +0000 (15:28 -0600)]
Restore info_command and breakpoint

As discussed on gdb-patches, this restores info_command and the
breakpoint on info_command in gdb-gdb.gdb.  This reverts a tiny part
of 0743fc83c03 ("Replace most calls to help_list and cmd_show_list"),
as well as 652fc23a30a ("Remove gdb-gdb.gdb breakpoint on disappeared
function info_command.").

gdb/ChangeLog
2020-05-11  Tom Tromey  <tromey@adacore.com>

* cli/cli-cmds.c (info_command): Restore.
(_initialize_cli_cmds): Use add_prefix_command for "info".
* gdb-gdb.gdb.in: Restore breakpoint on info_command.

4 years agogdb/testsuite: Detect and warn about duplicate test names
Andrew Burgess [Thu, 23 Apr 2020 14:19:15 +0000 (15:19 +0100)]
gdb/testsuite: Detect and warn about duplicate test names

Building on the previous commit, this patch detects when two tests
have the same test name and causes Dejagnu to print a new result type
'# of duplicate test names' in the result summary.  A line starting
with 'DUPLICATE: ' is also added to the gdb.sum and gdb.log files.

The DUPLICATE markers will be printed the second time a duplicate test
name is seen, and every time after that.  So you might see:

  PASS: gdb.base/sometest.exp: foo
  PASS: gdb.base/sometest.exp: bar
  PASS: gdb.base/sometest.exp: foo
  DUPLICATE: gdb.base/sometest.exp: foo
  PASS: gdb.base/sometest.exp: baz
  PASS: gdb.base/sometest.exp: foo
  DUPLICATE: gdb.base/sometest.exp: foo

However, the results will report a duplicate count of 1, indicating
that just one test name (foo) was duplicated.

Currently if the tests are run in parallel mode the new result type is
not merged into the combined summary file so users will need to run in
non-parallel mode to check this result.  Similarly, the 'DUPLICATE: '
markers will not be merged into the final gdb.sum file.  A later
commit will fix this.

gdb/testsuite/ChangeLog:

* lib/check-test-names.exp (all_test_names): New module variable.
(counts): Add 'duplicates' field.
(_check_duplicates): New procedure.
(check): Also check for duplicates.
(do_log_summary): Print duplicates count.
(do_reset_vars): Reset counter for duplicate test names, and
discard all know test names.

4 years agogdb/testsuite: Detect and warn if paths are used in test names
Andrew Burgess [Thu, 23 Apr 2020 09:47:29 +0000 (10:47 +0100)]
gdb/testsuite: Detect and warn if paths are used in test names

A new library is introduced that hooks into the core of Dejagnu and
detects when a test's name includes either the source or build paths.
If any offending test names are detected then Dejagnu will print a
new result type, '# of paths in test names'.  Users should treat this
result type just like other bad results types, and aim not to increase
this number.

As well as displaying the total number of offending tests as part of
the final results, a new marker is included in both the gdb.log and
gdb.sum files, this marker starts with 'PATH: ', so an offending test
would be expected to appear like this:

  PASS: gdb.base/sometest.exp: Loaded /path/to/build/testsuite/foo.exe
  PATH: gdb.base/sometest.exp: Loaded /path/to/build/testsuite/foo.exe

This should make it easier to track down offending tests.

Currently for a local run on my machine, I don't see any offending
test names, but it is possible that different targets, or different
configurations, might currently be breaking the no paths rule.

In order to get this working I have needed to wrap two core Dejagnu
functions, log_summary, and reset_vars.  Relying on core functions
that are not part of any API is always going to be risky, given the
relatively slow rate of Dejagnu change this is probably OK for now,
and we can possibly upstream some changes to Dejagnu that would allow
this functionality to be supported in a more official way later on.

Currently if the tests are run in parallel mode the new result type is
not merged into the combined summary file so users will need to run in
non-parallel mode to check this result.  Similarly, the 'PATH: '
markers will not be merged into the combined summary file.  A later
commit will fix this.

gdb/testsuite/ChangeLog:

* lib/gdb.exp: Include check-test-names.exp library.
* lib/check-test-names.exp: New file.

4 years agoFix Ada value printing on PPC64
Tom Tromey [Mon, 11 May 2020 20:57:49 +0000 (14:57 -0600)]
Fix Ada value printing on PPC64

The val_print removal patches introduced an Ada regression on PPC64
(probably any big-endian system).

The issue comes because value_field does not understand that Ada
wrapper fields can be bitfields that wrap a non-scalar type.  In this
case the value is already left-justified, so the justification done
there does the wrong thing.

Perhaps it would be good, eventually, to change value_field to
understand this case.  In the meantime this implements an Ada-specific
solution.

gdb/ChangeLog
2020-05-11  Tom Tromey  <tromey@adacore.com>

* ada-lang.c (ada_value_primitive_field): Now public.
* ada-lang.h (ada_value_primitive_field): Declare.
* ada-valprint.c (print_field_values): Use
ada_value_primitive_field for wrapper fields.

4 years ago[gdb/testsuite] Change kfail into xfail in gdb.ada/packed_tagged.exp
Tom de Vries [Mon, 11 May 2020 20:30:18 +0000 (22:30 +0200)]
[gdb/testsuite] Change kfail into xfail in gdb.ada/packed_tagged.exp

Test-case gdb.ada/packed_tagged.exp contains a kfail:
...
setup_kfail "gnat compiler bug" *-*-*
...

Kfails are used to indicate problems in gdb, xfails are used to indicate
problems in the environment.

A bug in the gnat compiler is a problem in the environment rather than gdb.

Fix this by changing the kfail into an xfail.

Tested on x86_64-linux.

gdb/testsuite/ChangeLog:

2020-05-11  Tom de Vries  <tdevries@suse.de>

* gdb.ada/packed_tagged.exp: Change kfail into xfail.

4 years agoFix gdb.ada/attr_ref_and_charlit.exp typo
Keith Seitz [Mon, 11 May 2020 19:22:25 +0000 (12:22 -0700)]
Fix gdb.ada/attr_ref_and_charlit.exp typo

... introduced by my last commit:

-gdb_test "print s'last"  " = 3"
+    gdb_test "print s'last"  " = 3Z

gdb/testsuite/ChangeLog
2020-05-11  Keith Seitz  <keiths@redhat.com>

* gdb.ada/attr_ref_and_charlit.exp: Fix typo.

4 years ago[gdb/testsuite] Fix gdb.cp/cpexprs-debug-types.exp inclusion
Tom de Vries [Mon, 11 May 2020 18:36:11 +0000 (20:36 +0200)]
[gdb/testsuite] Fix gdb.cp/cpexprs-debug-types.exp inclusion

When running tests using RUNTESTFLAGS="cpexprs.exp cpexprs-debug-types.exp",
we have:
...
Running src/gdb/testsuite/gdb.cp/cpexprs-debug-types.exp ...
Running src/gdb/testsuite/gdb.cp/cpexprs.exp ...
...

In the first test-case, we have -fdebug-types-section as expected:
...
Running src/gdb/testsuite/gdb.cp/cpexprs-debug-types.exp ...
g++ -fno-stack-protector -fdiagnostics-color=never \
  -fdebug-types-section \
  -c -g \
  -o outputs/gdb.cp/cpexprs-debug-types/cpexprs-debug-types0.o \
  src/gdb/testsuite/gdb.cp/cpexprs.cc
...
but in the second test-case, we have also have -fdebug-types-section:
...
Running src/gdb/testsuite/gdb.cp/cpexprs.exp ...
g++ -fno-stack-protector -fdiagnostics-color=never \
  -fdebug-types-section \
  -c -g -g \
  -o outputs/gdb.cp/cpexprs/cpexprs0.o \
  src/gdb/testsuite/gdb.cp/cpexprs.cc
...

This is due to using a global variable flags, which is set in
cpexprs-debug-types.exp and tested for existence in cpexprs.exp.

Fix this by using a more robust inclusion mechanism, that is:
- move the bulk of the test-case cpexprs.exp to cpexprs.exp.in,
- include it from cpexprs.exp and cpexprs-debug-types.exp, and
- set flags in both .exp files

gdb/testsuite/ChangeLog:

2020-05-11  Tom de Vries  <tdevries@suse.de>

* gdb.cp/cpexprs.exp: Move everything except flags setting ...
* gdb.cp/cpexprs.exp.in: .. here.
* gdb.cp/cpexprs-debug-types.exp: Include cpexprs.exp.in instead of
cpexprs.exp.

4 years agoClean-up gdb.ada test names
Keith Seitz [Mon, 11 May 2020 17:27:32 +0000 (10:27 -0700)]
Clean-up gdb.ada test names

This patch fixes all duplicate and tail parentheses test names.
These can really hinder automated test analysis such as used by
the buildbot.

Before:
$ cat testsuite/gdb.sum | egrep "^(PASS|FAIL|XPASS|XFAIL|KPASS|KFAIL)" \
  | sort | uniq -c | sort -n | grep -v " 1 "
      2 PASS: gdb.ada/attr_ref_and_charlit.exp: print s'last
      2 PASS: gdb.ada/bp_on_var.exp: set breakpoint pending off
      2 PASS: gdb.ada/complete.exp: complete p pck.inne
      2 PASS: gdb.ada/fun_overload_menu.exp: multiple matches for f (f (1, null))
      2 PASS: gdb.ada/type_coercion.exp: p q
      2 PASS: gdb.ada/unc_arr_ptr_in_var_rec.exp: print My_P_Object.Ptr when no longer null
      3 PASS: gdb.ada/fun_overload_menu.exp: 1

After:
<empty>

For parentheses, I've audited all occurrences of trailing parentheses.
Most offenders are of the form:

   gdb_test "p func (..)" $expected_result

I've either added a unique test name or simply removed the whitespace
between the function name and the argument list.

gdb/testsuite/ChangeLog
2020-05-11  Keith Seitz  <keiths@redhat.com>

* gdb.ada/arrayparam.exp: Resolve duplicate and tail parentheses
test names.
* gdb.ada/arrayptr.exp: Likewise.
* gdb.ada/assign_arr.exp: Likewise.
* gdb.ada/attr_ref_and_charlit.exp: Likewise.
* gdb.ada/bp_on_var.exp: Likewise.
* gdb.ada/call_pn.exp: Likewise.
* gdb.ada/complete.exp: Likewise.
* gdb.ada/fun_overload_menu.exp: Likewise.
* gdb.ada/funcall_param.exp: Likewise.
* gdb.ada/funcall_ref.exp: Likewise.
* gdb.ada/packed_array_assign.exp: Likewise.
* gdb.ada/same_component_name.exp: Likewise.
* gdb.ada/type_coercion.exp: Likewise.
* gdb.ada/unc_arr_ptr_in_var_rec.exp: Likewise.
* gdb.ada/variant_record_packed_array.exp: Likewise.

4 years ago[gdb/symtab] Save modules in .debug_names
Tom de Vries [Mon, 11 May 2020 15:13:49 +0000 (17:13 +0200)]
[gdb/symtab] Save modules in .debug_names

When running test-case gdb.fortran/info-modules.exp with target board
debug-names, I run into:
...
FAIL: gdb.fortran/info-modules.exp: info modules: check for entry \
  'info-types-2.f90', '18', 'mod2'
...

In more detail, comparing the behaviour of the executable without and with
.debug_names section, we have:
...
-$ gdb -batch info-modules -ex "info modules"
+$ gdb -batch info-modules.debugnames -ex "info modules"
 All defined modules:

-File /data/gdb_versions/devel/src/gdb/testsuite/gdb.fortran/info-types-2.f90:
-18:     mod2
-
 File /data/gdb_versions/devel/src/gdb/testsuite/gdb.fortran/info-types.f90:
 16:     mod1
...

This is due to the fact that the .debug_names section does not contain
DW_TAG_module entries.

Fix this in debug_names::psymbol_tag.

Build and tested on x86_64-linux with target board debug-names.

gdb/ChangeLog:

2020-05-11  Tom de Vries  <tdevries@suse.de>

* dwarf2/index-write.c (debug_names::psymbol_tag): Handle
MODULE_DOMAIN.

4 years ago[gdb/symtab] Fix incomplete CU list assert in .debug_names
Tom de Vries [Mon, 11 May 2020 13:03:54 +0000 (15:03 +0200)]
[gdb/symtab] Fix incomplete CU list assert in .debug_names

Consider the following two-file test-case:
...
$ cat main.c
extern int foo (void);

int
main (void)
{
  int sum, a, b;
  sum = a + b + foo ();
  return sum;
}
$ cat foo.c
int
foo (void)
{
  return 3;
}
...

Compiled like this:
...
$ clang-10 -gdwarf-5 -gpubnames -c main.c
$ clang-10 -gdwarf-5 -c foo.c
$ clang-10 -gdwarf-5 -gpubnames main.o foo.o
...

When loading this exec into gdb, we run into this assert:
...
$ gdb a.out
Reading symbols from a.out...

warning: Section .debug_aranges in a.out entry at offset 0 \
  debug_info_offset 0 does not exists, ignoring .debug_aranges.
src/gdb/dwarf2/read.c:6949: \
  internal-error: cutu_reader::cutu_reader(dwarf2_per_cu_data*, \
                              abbrev_table*, int, bool): \
  Assertion `this_cu->length == cu->header.get_length ()' failed.
...

The problem is that the determined length of the CU:
...
(gdb) p /x this_cu->length
$4 = 0x26a
...
does not match the actual length:
...
(gdb) p /x cu->header.get_length ()
$5 = 0x59
...

The length of the CU is determined in create_cus_from_debug_names_list, and
set based on this list in the .debug_names section:
...
  Compilation Unit offsets [
    CU[0]: 0x000000c7
  ]
...
and it is assumed that this is a complete list, so the size of the CU is
calculated using the end of the .debug_section at 0x331, making it 0x331 -
0xc7 == 0x26a.

However, the CU list is not complete:
...
$ llvm-dwarfdump -debug-info a.out \
  | grep "Compile Unit" \
  | sed 's/Compile Unit.*//'
0x00000000:
0x0000002e:
0x000000a5:
0x000000c7:
0x00000120:
0x00000157:
0x0000030f:
...
In particular, because the CU for foo.c is there at 0x120 (the rest of the CUs
is due to openSUSE having debug info for various linked in objects).

Fix the assert by not assuming to know the length of CUs in
create_cus_from_debug_names_list (if the .debug_names is not produced by GDB),
and setting it to 0, and setting it later to the actual length.

Note that this does not fix the .debug_aranges warning, that's PR25969.

Build and tested on x86_64-linux, with native and debug-names.

gdb/ChangeLog:

2020-05-11  Tom de Vries  <tdevries@suse.de>

PR symtab/25941
* dwarf2/read.c (create_cus_from_debug_names_list): Initialize CUs
with length 0, if not gdb-produced.
(cutu_reader::cutu_reader): Set CU length to actual length if 0.

gdb/testsuite/ChangeLog:

2020-05-11  Tom de Vries  <tdevries@suse.de>

PR symtab/25941
* gdb.dwarf2/clang-debug-names.exp.in: New include exp file, factored
out of ...
* gdb.dwarf2/clang-debug-names.exp: ... here.
* gdb.dwarf2/clang-debug-names-2.exp: New file.  Include
clang-debug-names.exp.in.
* gdb.dwarf2/clang-debug-names-2-foo.c: New test.
* gdb.dwarf2/clang-debug-names-2.c: New test.

4 years agoPower10 VSX scalar min-max-compare quad precision operations
Alan Modra [Mon, 11 May 2020 00:19:29 +0000 (09:49 +0930)]
Power10 VSX scalar min-max-compare quad precision operations

opcodes/
* ppc-opc (powerpc_opcodes): Add xscmpeqqp, xscmpgeqp, xscmpgtqp,
xsmaxcqp, xsmincqp.
gas/
* testsuite/gas/ppc/scalarquad.d,
* testsuite/gas/ppc/scalarquad.s: New test.
* testsuite/gas/ppc/ppc.exp: Run it.

4 years agoPower10 VSX load/store rightmost element operations
Alan Modra [Mon, 11 May 2020 00:18:29 +0000 (09:48 +0930)]
Power10 VSX load/store rightmost element operations

opcodes/
* ppc-opc.c (powerpc_opcodes): Add lxvrbx, lxvrhx, lxvrwx, lxvrdx,
stxvrbx, stxvrhx, stxvrwx, stxvrdx.
gas/
* testsuite/gas/ppc/rightmost.d,
* testsuite/gas/ppc/rightmost.s: New test.
* testsuite/gas/ppc/ppc.exp: Run it.

4 years agoPower10 test lsb by byte operation
Alan Modra [Mon, 11 May 2020 00:17:38 +0000 (09:47 +0930)]
Power10 test lsb by byte operation

opcodes/
* ppc-opc.c (powerpc_opcodes): Add xvtlsbb.
gas/
* testsuite/gas/ppc/xvtlsbb.d,
* testsuite/gas/ppc/xvtlsbb.s: New test.
* testsuite/gas/ppc/ppc.exp: Run it.

4 years agoPower10 string operations
Alan Modra [Mon, 11 May 2020 00:16:45 +0000 (09:46 +0930)]
Power10 string operations

opcodes/
* ppc-opc.c (powerpc_opcodes): Add vstribl, vstribr, vstrihl, vstrihr,
vclrlb, vclrrb, vstribl., vstribr., vstrihl., vstrihr..
gas/
* testsuite/gas/ppc/stringop.d,
* testsuite/gas/ppc/stringop.s: New test.
* testsuite/gas/ppc/ppc.exp: Run it.

4 years agoPower10 Set boolean extension
Peter Bergner [Mon, 11 May 2020 00:15:42 +0000 (09:45 +0930)]
Power10 Set boolean extension

opcodes/
* ppc-opc.c (powerpc_opcodes) <setbc, setbcr, setnbc, setnbcr>: New
mnemonics.
gas/
* testsuite/gas/ppc/set_bool.d,
* testsuite/gas/ppc/set_bool.s: New test.
* testsuite/gas/ppc/ppc.exp: Run it.

4 years agoPower10 bit manipulation operations
Alan Modra [Mon, 11 May 2020 00:14:25 +0000 (09:44 +0930)]
Power10 bit manipulation operations

opcodes/
* ppc-opc.c (UIM8, P_U8XX4_MASK): Define.
(powerpc_opcodes): Add vgnb, vcfuged, vpextd, vpdepd, vclzdm,
vctzdm, cntlzdm, pdepd, pextd, cfuged, cnttzdm.
(prefix_opcodes): Add xxeval.
gas/
* testsuite/gas/ppc/bitmanip.d,
* testsuite/gas/ppc/bitmanip.s: New test.
* testsuite/gas/ppc/ppc.exp: Run it.

4 years agoPower10 VSX PCV generate operations
Alan Modra [Mon, 11 May 2020 00:13:15 +0000 (09:43 +0930)]
Power10 VSX PCV generate operations

opcodes/
* ppc-opc.c (powerpc_opcodes): Add xxgenpcvbm, xxgenpcvhm,
xxgenpcvwm, xxgenpcvdm.
gas/
* testsuite/gas/ppc/genpcv.d,
* testsuite/gas/ppc/genpcv.s: New test.
* testsuite/gas/ppc/ppc.exp: Run it.

4 years agoPower10 VSX Mask Manipulation Operations
Alan Modra [Mon, 11 May 2020 00:11:57 +0000 (09:41 +0930)]
Power10 VSX Mask Manipulation Operations

opcodes/
* ppc-opc.c (MP, VXVAM_MASK): Define.
(VXVAPS_MASK): Use VXVA_MASK.
(powerpc_opcodes): Add mtvsrbmi, vexpandbm, vexpandhm, vexpandwm,
vexpanddm, vexpandqm, vextractbm, vextracthm, vextractwm,
vextractdm, vextractqm, mtvsrbm, mtvsrhm, mtvsrwm, mtvsrdm, mtvsrqm,
vcntmbb, vcntmbh, vcntmbw, vcntmbd.
gas/
* testsuite/gas/ppc/maskmanip.d,
* testsuite/gas/ppc/maskmanip.s: New test.
* testsuite/gas/ppc/ppc.exp: Run it.

4 years agoPower10 Reduced precision outer product operations
Alan Modra [Mon, 11 May 2020 00:10:42 +0000 (09:40 +0930)]
Power10 Reduced precision outer product operations

include/
* opcode/ppc.h (PPC_OPERAND_ACC): Define.  Renumber following
PPC_OPERAND defines.
opcodes/
* ppc-opc.c (insert_xa6a, extract_xa6a, insert_xb6a, extract_xb6a):
New functions.
(powerpc_operands): Define ACC, PMSK8, PMSK4, PMSK2, XMSK, YMSK,
YMSK2, XA6a, XA6ap, XB6a entries.
(PMMIRR, P_X_MASK, P_XX1_MASK, P_GER_MASK): Define
(P_GER2_MASK, P_GER4_MASK, P_GER8_MASK, P_GER64_MASK): Define.
(PPCVSX4): Define.
(powerpc_opcodes): Add xxmfacc, xxmtacc, xxsetaccz,
xvi8ger4pp, xvi8ger4, xvf16ger2pp, xvf16ger2, xvf32gerpp, xvf32ger,
xvi4ger8pp, xvi4ger8, xvi16ger2spp, xvi16ger2s, xvbf16ger2pp,
xvbf16ger2, xvf64gerpp, xvf64ger, xvi16ger2, xvf16ger2np,
xvf32gernp, xvi8ger4spp, xvi16ger2pp, xvbf16ger2np, xvf64gernp,
xvf16ger2pn, xvf32gerpn, xvbf16ger2pn, xvf64gerpn, xvf16ger2nn,
xvf32gernn, xvbf16ger2nn, xvf64gernn, xvcvbf16sp, xvcvspbf16.
(prefix_opcodes): Add pmxvi8ger4pp, pmxvi8ger4, pmxvf16ger2pp,
pmxvf16ger2, pmxvf32gerpp, pmxvf32ger, pmxvi4ger8pp, pmxvi4ger8,
pmxvi16ger2spp, pmxvi16ger2s, pmxvbf16ger2pp, pmxvbf16ger2,
pmxvf64gerpp, pmxvf64ger, pmxvi16ger2, pmxvf16ger2np, pmxvf32gernp,
pmxvi8ger4spp, pmxvi16ger2pp, pmxvbf16ger2np, pmxvf64gernp,
pmxvf16ger2pn, pmxvf32gerpn, pmxvbf16ger2pn, pmxvf64gerpn,
pmxvf16ger2nn, pmxvf32gernn, pmxvbf16ger2nn, pmxvf64gernn.
gas/
* config/tc-ppc.c (pre_defined_registers): Add accumulators.
(md_assemble): Check acc specified in correct operand.
* testsuite/gas/ppc/outerprod.d,
* testsuite/gas/ppc/outerprod.s,
* testsuite/gas/ppc/vsx4.d,
* testsuite/gas/ppc/vsx4.s: New tests.
* testsuite/gas/ppc/ppc.exp: Run them.

4 years agoPower10 SIMD permute class operations
Alan Modra [Mon, 11 May 2020 00:07:14 +0000 (09:37 +0930)]
Power10 SIMD permute class operations

opcodes/
* ppc-opc.c (insert_imm32, extract_imm32): New functions.
(insert_xts, extract_xts): New functions.
(IMM32, UIM3, IX, UIM5, SH3, XTS, P8RR): Define.
(P_XX4_MASK, P_UXX4_MASK, VSOP, P_VS_MASK, P_VSI_MASK): Define.
(VXRC_MASK, VXSH_MASK): Define.
(powerpc_opcodes): Add vinsbvlx, vsldbi, vextdubvlx, vextdubvrx,
vextduhvlx, vextduhvrx, vextduwvlx, vextduwvrx, vextddvlx,
vextddvrx, vinshvlx, vinswvlx, vinsw, vinsbvrx, vinshvrx,
vinswvrx, vinsd, vinsblx, vsrdbi, vinshlx, vinswlx, vinsdlx,
vinsbrx, vinshrx, vinswrx, vinsdrx, lxvkq.
(prefix_opcodes): Add xxsplti32dx, xxspltidp, xxspltiw, xxblendvb,
xxblendvh, xxblendvw, xxblendvd, xxpermx.
gas/
* testsuite/gas/ppc/simd_perm.d,
* testsuite/gas/ppc/simd_perm.s: New test.
* testsuite/gas/ppc/ppc.exp: Run it.

4 years agoPower10 128-bit binary integer operations
Alan Modra [Mon, 11 May 2020 00:06:11 +0000 (09:36 +0930)]
Power10 128-bit binary integer operations

opcodes/
* ppc-opc.c (powerpc_opcodes): Add vrlq, vdivuq, vmsumcud, vrlqmi,
vmuloud, vcmpuq, vslq, vdivsq, vcmpsq, vrlqnm, vcmpequq, vmulosd,
vsrq, vdiveuq, vcmpgtuq, vmuleud, vsraq, vdivesq, vcmpgtsq, vmulesd,
vcmpequq., vextsd2q, vmoduq, vcmpgtuq., vmodsq, vcmpgtsq., xscvqpuqz,
xscvuqqp, xscvqpsqz, xscvsqqp, dcffixqq, dctfixqq.
gas/
* testsuite/gas/ppc/int128.d,
* testsuite/gas/ppc/int128.s: New test.
* testsuite/gas/ppc/ppc.exp: Run it.

4 years agoPower10 VSX 32-byte storage access
Alan Modra [Mon, 11 May 2020 00:04:49 +0000 (09:34 +0930)]
Power10 VSX 32-byte storage access

bfd/
* elf64-ppc.c (xlate_pcrel_opt): Handle lxvp and stxvp.
opcodes/
* ppc-opc.c (insert_xtp, extract_xtp): New functions.
(XTP, DQXP, DQXP_MASK): Define.
(powerpc_opcodes): Add lxvp, stxvp, lxvpx, stxvpx.
(prefix_opcodes): Add plxvp and pstxvp.
gas/
* testsuite/gas/ppc/vsx_32byte.d,
* testsuite/gas/ppc/vsx_32byte.s: New test.
* testsuite/gas/ppc/ppc.exp: Run it.
ld/
* testsuite/ld-powerpc/pcrelopt.s: Add lxvp and stxvp.
* testsuite/ld-powerpc/pcrelopt.d: Update.

4 years agoPower10 vector integer multiply, divide, modulo insns
Alan Modra [Mon, 11 May 2020 00:02:56 +0000 (09:32 +0930)]
Power10 vector integer multiply, divide, modulo insns

opcodes/
* ppc-opc.c (powerpc_opcodes): Add vdivuw, vdivud, vdivsw, vmulld,
vdivsd, vmulhuw, vdiveuw, vmulhud, vdiveud, vmulhsw, vdivesw,
vmulhsd, vdivesd, vmoduw, vmodud, vmodsw, vmodsd.
gas/
* testsuite/gas/ppc/vec_mul.s,
* testsuite/gas/ppc/vec_mul.d: New test.
* testsuite/gas/ppc/ppc.exp: Run it.

4 years agoPower10 byte reverse instructions
Peter Bergner [Mon, 11 May 2020 00:01:40 +0000 (09:31 +0930)]
Power10 byte reverse instructions

opcodes/
* ppc-opc.c (powerpc_opcodes) <brd, brh, brw>: New mnemonics.
gas/
* testsuite/gas/ppc/byte_rev.d,
* testsuite/gas/ppc/byte_rev.s: New test.
* testsuite/gas/ppc/ppc.exp: Run it.

4 years agoPower10 Copy/Paste Extensions
Peter Bergner [Mon, 11 May 2020 00:00:19 +0000 (09:30 +0930)]
Power10 Copy/Paste Extensions

opcodes/
* opcodes/ppc-opc.c (insert_l1opt, extract_l1opt): New functions.
(L1OPT): Define.
(powerpc_opcodes) <paste.>: Add L operand for cpu POWER10.
gas/
* testsuite/gas/ppc/power10.d: Add paste. tests.
* testsuite/gas/ppc/power10.s: Likewise.

4 years agoPower10 Add new L operand to the slbiag instruction
Peter Bergner [Sun, 10 May 2020 23:57:48 +0000 (09:27 +0930)]
Power10 Add new L operand to the slbiag instruction

opcodes/
* ppc-opc.c (powerpc_opcodes) <slbiag>: Add variant with L operand.
gas/
* testsuite/gas/ppc/power10.s: New test.
* testsuite/gas/ppc/power10.d: Likewise.
* testsuite/gas/ppc/ppc.exp: Run it.

4 years agoPowerPC Default disassembler to -Mpower10
Alan Modra [Sun, 10 May 2020 23:55:30 +0000 (09:25 +0930)]
PowerPC Default disassembler to -Mpower10

* ppc-dis.c (powerpc_init_dialect): Default to "power10".

4 years agoPowerPC Rename powerxx to power10
Alan Modra [Sun, 10 May 2020 23:54:14 +0000 (09:24 +0930)]
PowerPC Rename powerxx to power10

Now that ISA3.1 is out we can finish with the powerxx silliness.

bfd/
* elf64-ppc.c: Rename powerxx to power10 throughout.
gas/
* config/tc-ppc.c (md_assemble): Update for PPC_OPCODE_POWER10
renaming.
* testsuite/gas/ppc/prefix-align.d: Use -mpower10/-Mpower10 in
place of -mfuture/-Mfuture.
* testsuite/gas/ppc/prefix-pcrel.d: Likewise.
* testsuite/gas/ppc/prefix-reloc.d: Likewise.
gold/
* powerpc.cc: Rename powerxx to power10 throughout.
include/
* elf/ppc64.h: Update comment.
* opcode/ppc.h (PPC_OPCODE_POWER10): Rename from PPC_OPCODE_POWERXX.
ld/
* testsuite/ld-powerpc/callstub-1.d: Use -mpower10/-Mpower10 in
place of -mfuture/-Mfuture.
* testsuite/ld-powerpc/notoc2.d: Likewise.
* testsuite/ld-powerpc/powerpc.exp: Likewise.
* testsuite/ld-powerpc/tlsgd.d: Likewise.
* testsuite/ld-powerpc/tlsie.d: Likewise.
* testsuite/ld-powerpc/tlsld.d: Likewise.
opcodes/
* ppc-dis.c (ppc_opts): Add "power10" entry.
(print_insn_powerpc): Update for PPC_OPCODE_POWER10 renaming.
* ppc-opc.c (POWER10): Rename from POWERXX.  Update all uses.

4 years agoUpdated French translation for the ld sub-directory and an update Spanish translation...
Nick Clifton [Mon, 11 May 2020 11:02:26 +0000 (12:02 +0100)]
Updated French translation for the ld sub-directory and an update Spanish translation for the opcodes subdirectory.

4 years agoPR25961, buffer overflow in coff_swap_aux_in
Alan Modra [Mon, 11 May 2020 08:30:31 +0000 (18:00 +0930)]
PR25961, buffer overflow in coff_swap_aux_in

PR 25961
* coffgen.c (coff_get_normalized_symtab): Check that buffer
contains required number of auxents before processing any auxent.
* coffswap.h (coff_swap_aux_in <C_FILE>): Only swap in extended
file name from auxents for PE.

4 years agoAutomatic date update in version.in
GDB Administrator [Mon, 11 May 2020 00:00:07 +0000 (00:00 +0000)]
Automatic date update in version.in

4 years agogdb/fortran: Allow Flang MAIN_ in Fortran testing
Alok Kumar Sharma [Sun, 10 May 2020 19:12:00 +0000 (00:42 +0530)]
gdb/fortran: Allow Flang MAIN_ in Fortran testing

Name of fortran main function for Flang compiler is MAIN_ while
for gfortran it is MAIN__ . In test cases MAIN__ is hardcoded for
the purpose of inserting breakpoint.

New proc is added to detect main function name depending on the
compiler used.
Fortran specific version of runto_main named fortran_runto_main
is added.

This commit adds support for Flang main function, there should be
no change for gfortran.

gdb/testsuite/ChangeLog

* lib/fortran.exp (fortran_main): New Proc, handle flang MAIN_,
(fortran_runto_main): New Proc, fortran version of runto_main.
* gdb.fortran/array-bounds-high.exp: Handle flang MAIN_.
* gdb.fortran/array-bounds.exp: Likewise.
* gdb.fortran/array-slices.exp: Likewise.
* gdb.fortran/block-data.exp: Likewise.
* gdb.fortran/charset.exp: Likewise.
* gdb.fortran/common-block.exp: Likewise.
* gdb.fortran/complex.exp: Likewise.
* gdb.fortran/derived-type-function.exp: Likewise.
* gdb.fortran/derived-type.exp: Likewise.
* gdb.fortran/info-modules.exp: Likewise.
* gdb.fortran/info-types.exp: Likewise.
* gdb.fortran/intrinsics.exp: Likewise.
* gdb.fortran/library-module.exp: Likewise.
* gdb.fortran/logical.exp: Likewise.
* gdb.fortran/max-depth.exp: Likewise.
* gdb.fortran/module.exp: Likewise.
* gdb.fortran/multi-dim.exp: Likewise.
* gdb.fortran/nested-funcs.exp: Likewise.
* gdb.fortran/print-formatted.exp: Likewise.
* gdb.fortran/print_type.exp: Likewise.
* gdb.fortran/printing-types.exp: Likewise.
* gdb.fortran/ptr-indentation.exp: Likewise.
* gdb.fortran/ptype-on-functions.exp: Likewise.
* gdb.fortran/subarray.exp: Likewise.
* gdb.fortran/vla-alloc-assoc.exp: Likewise.
* gdb.fortran/vla-datatypes.exp: Likewise.
* gdb.fortran/vla-history.exp: Likewise.
* gdb.fortran/vla-ptr-info.exp: Likewise.
* gdb.fortran/vla-ptype-sub.exp: Likewise.
* gdb.fortran/vla-ptype.exp: Likewise.
* gdb.fortran/vla-sizeof.exp: Likewise.
* gdb.fortran/vla-type.exp: Likewise.
* gdb.fortran/vla-value-sub-arbitrary.exp: Likewise.
* gdb.fortran/vla-value-sub-finish.exp: Likewise.
* gdb.fortran/vla-value-sub.exp: Likewise.
* gdb.fortran/vla-value.exp: Likewise.
* gdb.fortran/whatis_type.exp: Likewise.
* gdb.mi/mi-var-child-f.exp: Likewise.

4 years agoAutomatic date update in version.in
GDB Administrator [Sun, 10 May 2020 00:00:15 +0000 (00:00 +0000)]
Automatic date update in version.in

4 years ago[gdb] Fix catch throw regexp matching
Tom de Vries [Sat, 9 May 2020 18:17:10 +0000 (20:17 +0200)]
[gdb] Fix catch throw regexp matching

When running test-case gdb.mi/mi-catch-cpp-exceptions.exp, we have:
...
FAIL: gdb.mi/mi-catch-cpp-exceptions.exp: all with invalid regexp: run until \
  breakpoint in main (unknown output after running)
...

This is a regression since commit 596dc4adff "Speed up psymbol reading by
removing a copy".

Before that commit, we have:
...
$ gdb \
    -batch \
    ./outputs/gdb.mi/mi-catch-cpp-exceptions/mi-catch-cpp-exceptions \
    -ex "break 67" \
    -ex "catch throw -r blahblah" \
    -ex r
Breakpoint 1 at 0x4008e5: file mi-catch-cpp-exceptions.cc, line 67.
Catchpoint 2 (throw)

Breakpoint 1, main () at mi-catch-cpp-exceptions.cc:67
67                  return 1;   /* Stop here.  */
...
In other words:
- we set a breakpoint somewhere in main,
- we set a catchpoint with a regexp that is intended to not match any
  exception, and
- run to the breakpoint, without the catchpoint triggering.

After the commit, we have:
...
$ gdb \
    -batch \
    ./outputs/gdb.mi/mi-catch-cpp-exceptions/mi-catch-cpp-exceptions \
    -ex "break 67" \
    -ex "catch throw -r blahblah" \
    -ex r
Breakpoint 1 at 0x4008e5: file mi-catch-cpp-exceptions.cc, line 67.
Catchpoint 2 (throw)

Catchpoint 2 (exception thrown), 0x00007ffff7ab037e in __cxa_throw () from \
  /usr/lib64/libstdc++.so.6
...
In other words, the catchpoint triggers.

This is caused by this bit of the commit:
...
       type_name = cplus_typename_from_type_info (typeinfo_arg);

       canon = cp_canonicalize_string (type_name.c_str ());
-      if (!canon.empty ())
-       std::swap (type_name, canon);
+      name = (canon == nullptr
+       ? canon.get ()
+       : type_name.c_str ());
     }
   catch (const gdb_exception_error &e)
     {
       exception_print (gdb_stderr, e);
     }

-  if (!type_name.empty ())
+  if (name != nullptr)
     {
-      if (self->pattern->exec (type_name.c_str (), 0, NULL, 0) != 0)
+      if (self->pattern->exec (name, 0, NULL, 0) != 0)
...

Before the commit, we have:
- type_name == "my_exception"
- canon = ""
and the !type_name.empty () test succeeds, and gdb executes the
self->pattern->exec call.

After the commit, we have:
- type_name == "my_exception"
- canon == NULL
- name == NULL
and the name != nullptr test fails, and gdb doesn't execute the
self->pattern->exec call.

Fix this by inverting the condition for the calculation of name:
...
-      name = (canon == nullptr
+      name = (canon != nullptr
...

Build and tested on x86_64-linux.

gdb/ChangeLog:

2020-05-09  Tom de Vries  <tdevries@suse.de>

PR gdb/25955
* break-catch-throw.c (check_status_exception_catchpoint): Fix name
calculation.

4 years agoChange server_command to bool
Tom Tromey [Sat, 9 May 2020 18:04:58 +0000 (12:04 -0600)]
Change server_command to bool

I noticed that "server_command" is an int, but really it should be a
bool.

gdb/ChangeLog
2020-05-09  Tom Tromey  <tom@tromey.com>

* top.c (server_command): Now bool.
* top.h (server_command): Now bool.

4 years agoFix for the complaint observed when symbol reading due to unsupported .debug_names...
nitachra [Sat, 9 May 2020 08:03:51 +0000 (10:03 +0200)]
Fix for the complaint observed when symbol reading due to unsupported .debug_names form

Following complaint is observed with the executable compiled with -gdwarf-5
and -gpubnames flags - "During symbol reading: Unsupported .debug_names form
DW_FORM_ref4".  This is the form corresponding to DW_IDX_die_offset attribute.
This patch fixes this complaint.  Tested with clang 10.0.0.  Test case used -

int main()
{
int sum,a,b;
sum = a + b;
return sum;
}

clang -gdwarf-5 -gpubnames test.c -o test.out

gdb -q test.out -ex "set complaints 1" -ex "start"

Reading symbols from test.out...
During symbol reading: Unsupported .debug_names form DW_FORM_ref4 \
  [in module test.out]
Temporary breakpoint 1 at 0x400484
Starting program: test.out
During symbol reading: Unsupported .debug_names form DW_FORM_ref4 \
  [in module test.out]
During symbol reading: Unsupported .debug_names form DW_FORM_ref4 \
  [in module test.out]
During symbol reading: Unsupported .debug_names form DW_FORM_ref4 \
  [in module test.out]

gdb/dwarf2/ChangeLog:

2020-05-09  Nitika Achra  <Nitika.Achra@amd.com>

PR symtab/25952
* read.c (dw2_debug_names_iterator::next): Handle DW_FORM_ref*
and DW_IDX_die_offset.  If there is no compilation unit attribute in
the index entry, then there is a single CU.  Return the CU at O index
of compilation unit vector.

gdb/testsuite/ChangeLog:

2020-05-09  Tom de Vries  <tdevries@suse.de>

* gdb.dwarf2/clang-debug-names.exp: Remove PR25952 kfail.

4 years agoAutomatic date update in version.in
GDB Administrator [Sat, 9 May 2020 00:00:12 +0000 (00:00 +0000)]
Automatic date update in version.in

4 years agoDon't re-process a DIE in read_lexical_block_scope
Tom Tromey [Fri, 8 May 2020 20:26:11 +0000 (14:26 -0600)]
Don't re-process a DIE in read_lexical_block_scope

A customer reported a crash in the DWARF reader.

Investigation showed that the crash occurred in an unusual scenario: a
function was lexically scoped within some other function -- but the
inner function inlined the outer function and referred to its DIE via
DW_AT_abstract_origin.  With the executable in question,
inherit_abstract_dies could eventually call read_lexical_block_scope,
which in turn could recurse into process_die, to process a DIE that
was already being read, triggering an assert.

This came up once before; see:

https://www.sourceware.org/ml/gdb-patches/2014-02/msg00652.html

However, in this case, I don't have an easy way to reproduce.  So,
there is no test case.

I did experiment with the failing executable.  This patch fixes the
bug and doesn't seem to cause other issues.  For example, I can still
set breakpoints on the relevant functions.

gdb/ChangeLog
2020-05-08  Tom Tromey  <tromey@adacore.com>

* dwarf2/read.c (read_lexical_block_scope): Don't process a DIE
already being processed.

4 years agoMore C++-ification for struct display
Tom Tromey [Fri, 8 May 2020 20:21:22 +0000 (14:21 -0600)]
More C++-ification for struct display

This changes displays to have a constructor, use bool and std::string,
and to be stored using std::vector.  The ALL_DISPLAYS and
ALL_DISPLAYS_SAFE macros are removed.  While internal iteration is
still done via map_display_numbers, this is updated to use a
function_view.  These changes simplify the code somewhat; for example,
free_display can now be removed in favor of ordinary destruction.

gdb/ChangeLog
2020-05-08  Tom Tromey  <tom@tromey.com>

* printcmd.c (struct display) <next>: Remove.
<display>: New constructor.
<exp_string>: Now a std::string.
<enabled_p>: Now a bool.
(display_number): Move definition earlier.
(displays): Rename from display_chain.  Now a std::vector.
(ALL_DISPLAYS, ALL_DISPLAYS_SAFE): Remove.
(display_command): Update.
(do_one_display, disable_display)
(enable_disable_display_command, do_enable_disable_display):
Update.
(free_display): Remove.
(clear_displays): Rewrite.
(delete_display): Update.
(map_display_numbers): Use function_view.  Remove "data"
parameter.  Update.
(do_delete_display): Remove.
(undisplay_command): Update.
(do_one_display, do_displays, disable_display)
(info_display_command): Update.
(do_enable_disable_display): Remove.
(enable_disable_display_command)
(clear_dangling_display_expressions): Update.

4 years agoRemove ALL_PSPACES
Tom Tromey [Fri, 8 May 2020 20:21:22 +0000 (14:21 -0600)]
Remove ALL_PSPACES

This removes the ALL_PSPACES macro.  In this case it seemed cleanest
to change how program spaces are stored -- instead of using a linked
list, they are now stored in a std::vector.

gdb/ChangeLog
2020-05-08  Tom Tromey  <tom@tromey.com>

* symtab.c (set_symbol_cache_size)
(maintenance_print_symbol_cache, maintenance_flush_symbol_cache)
(maintenance_print_symbol_cache_statistics): Update.
* symmisc.c (print_symbol_bcache_statistics)
(print_objfile_statistics, maintenance_print_objfiles)
(maintenance_info_symtabs, maintenance_check_symtabs)
(maintenance_expand_symtabs, maintenance_info_line_tables):
Update.
* symfile-debug.c (set_debug_symfile): Update.
* source.c (forget_cached_source_info): Update.
* python/python.c (gdbpy_progspaces): Update.
* psymtab.c (maintenance_info_psymtabs): Update.
* probe.c (parse_probes): Update.
* linespec.c (iterate_over_all_matching_symtabs)
(collect_symtabs_from_filename, search_minsyms_for_name): Update.
* guile/scm-progspace.c (gdbscm_progspaces): Update.
* exec.c (exec_target::close): Update.
* ada-tasks.c (ada_tasks_new_objfile_observer): Update.
* breakpoint.c (print_one_breakpoint_location)
(create_longjmp_master_breakpoint)
(create_std_terminate_master_breakpoint): Update.
* progspace.c (program_spaces): Now a std::vector.
(maybe_new_address_space): Update.
(add_program_space): Remove.
(program_space::program_space): Update.
(remove_program_space): Update.
(number_of_program_spaces): Remove.
(print_program_space, update_address_spaces): Update.
* progspace.h (program_spaces): Change type.
(ALL_PSPACES): Remove.
(number_of_program_spaces): Don't declare.
(struct program_space) <next>: Remove.

4 years agoRemove ALL_SO_LIBS and so_list_head
Tom Tromey [Fri, 8 May 2020 20:21:22 +0000 (14:21 -0600)]
Remove ALL_SO_LIBS and so_list_head

This patch started as an attempt to replace ALL_SO_LIBS with an
ordinary C++ iterator.  However, then I tripped over the so_list_head
define again, and decided to remove it as well.

gdb/ChangeLog
2020-05-08  Tom Tromey  <tom@tromey.com>

* mi/mi-cmd-file.c (mi_cmd_file_list_shared_libraries): Update.
* solib-svr4.c (svr4_fetch_objfile_link_map): Update.
(enable_break): Update.
* solib-frv.c (frv_fdpic_find_global_pointer): Update.
(frv_fdpic_find_canonical_descriptor): Update.
(frv_fetch_objfile_link_map): Update.
* progspace.c (program_space::free_all_objfiles): Update.
(program_space::solibs): New method.
* progspace.h (struct program_space) <solibs>: New method.
* solist.h (master_so_list): Don't declare.
(ALL_SO_LIBS): Remove.
* solib.h (so_list_head): Remove.
(update_solib_list): Update comment.
* solib.c (master_so_list): Remove.
(solib_used, update_solib_list, solib_add)
(info_sharedlibrary_command, clear_solib)
(reload_shared_libraries_1, remove_user_added_objfile): Update.

4 years agoRemove ALL_EXTENSION_LANGUAGES and ALL_ENABLED_EXTENSION_LANGUAGES
Tom Tromey [Fri, 8 May 2020 20:21:22 +0000 (14:21 -0600)]
Remove ALL_EXTENSION_LANGUAGES and ALL_ENABLED_EXTENSION_LANGUAGES

This removes the ALL_EXTENSION_LANGUAGES and
ALL_ENABLED_EXTENSION_LANGUAGES macros, in favor of ordinary
iterators.  For ALL_ENABLED_EXTENSION_LANGUAGES, I chose to simply
inline the check, as that seemed simpler than trying to make
filtered_iterator work for std::array.  (As an aside, this sort of
thing will be easier once we can use the ranges library...)

gdb/ChangeLog
2020-05-08  Tom Tromey  <tom@tromey.com>

* extension.c (extension_languages): Now a std::array.
(ALL_EXTENSION_LANGUAGES): Remove.
(get_ext_lang_defn, get_ext_lang_of_file)
(eval_ext_lang_from_control_command): Update.
(finish_ext_lang_initialization)
(auto_load_ext_lang_scripts_for_objfile)
(ext_lang_type_printers::ext_lang_type_printers)
(apply_ext_lang_type_printers)
(ext_lang_type_printers::~ext_lang_type_printers)
(apply_ext_lang_val_pretty_printer, apply_ext_lang_frame_filter)
(preserve_ext_lang_values, get_breakpoint_cond_ext_lang)
(breakpoint_ext_lang_cond_says_stop, check_quit_flag)
(get_matching_xmethod_workers, ext_lang_colorize)
(ext_lang_before_prompt): Update.
(ALL_ENABLED_EXTENSION_LANGUAGES): Remove.

4 years agoSpeed up psymbol reading by removing a copy
Tom Tromey [Fri, 8 May 2020 20:14:05 +0000 (14:14 -0600)]
Speed up psymbol reading by removing a copy

I noticed that cp_canonicalize_string and friends copy a
unique_xmalloc_ptr to a std::string.  However, this copy isn't
genuinely needed anywhere, and it serves to slow down DWARF psymbol
reading.

This patch removes the copy and updates the callers to adapt.

This speeds up the reader from 1.906 seconds (mean of 10 runs, of gdb
on a copy of itself) to 1.888 seconds (mean of 10 runs, on the same
copy as the first trial).

gdb/ChangeLog
2020-05-08  Tom Tromey  <tom@tromey.com>

* symtab.h (class demangle_result_storage) <set_malloc_ptr>: New
overload.
<swap_string, m_string>: Remove.
* symtab.c (demangle_for_lookup, completion_list_add_symbol):
Update.
* stabsread.c (define_symbol, read_type): Update.
* linespec.c (find_linespec_symbols): Update.
* gnu-v3-abi.c (gnuv3_get_typeid): Update.
* dwarf2/read.c (dwarf2_canonicalize_name): Update.
* dbxread.c (read_dbx_symtab): Update.
* cp-support.h (cp_canonicalize_string_full)
(cp_canonicalize_string, cp_canonicalize_string_no_typedefs):
Return unique_xmalloc_ptr.
* cp-support.c (inspect_type): Update.
(cp_canonicalize_string_full): Return unique_xmalloc_ptr.
(cp_canonicalize_string_no_typedefs, cp_canonicalize_string):
Likewise.
* c-typeprint.c (print_name_maybe_canonical): Update.
* break-catch-throw.c (check_status_exception_catchpoint):
Update.

4 years ago[gdb] Fix stepping over fork with follow-fork-mode child and gcc-8
Tom de Vries [Fri, 8 May 2020 15:26:32 +0000 (17:26 +0200)]
[gdb] Fix stepping over fork with follow-fork-mode child and gcc-8

When running test-case gdb.threads/fork-child-threads.exp with gcc-8 instead
of gcc-7, we have:
...
 (gdb) next^M
 [Attaching after Thread 0x7ffff7fae740 (LWP 27574) fork to child process \
   27578]^M
 [New inferior 2 (process 27578)]^M
 [Detaching after fork from parent process 27574]^M
 [Inferior 1 (process 27574) detached]^M
 [Thread debugging using libthread_db enabled]^M
 Using host libthread_db library "/lib64/libthread_db.so.1".^M
 [Switching to Thread 0x7ffff7fae740 (LWP 27578)]^M
-main () at src/gdb/testsuite/gdb.threads/fork-child-threads.c:41^M
+main () at src/gdb/testsuite/gdb.threads/fork-child-threads.c:34^M
-41            i = pthread_create (&thread, NULL, start, NULL);^M
+34        switch (fork ())^M
-(gdb) PASS: gdb.threads/fork-child-threads.exp: next over fork
+(gdb) FAIL: gdb.threads/fork-child-threads.exp: next over fork
...

This is due to the fact that gcc-8 generates more precise line info, making
the instruction after the call to fork a "recommended breakpoint location".
However, it is a bug because next is supposed to move to the next source
line.

The problem is that in process_event_stop_test we hit this code:
...
  if ((ecs->event_thread->suspend.stop_pc == stop_pc_sal.pc)
      && (ecs->event_thread->current_line != stop_pc_sal.line
  || ecs->event_thread->current_symtab != stop_pc_sal.symtab))
    {
      if (stop_pc_sal.is_stmt)
{
  /* We are at the start of a different line.  So stop.  Note that
     we don't stop if we step into the middle of a different line.
     That is said to make things like for (;;) statements work
     better.  */
  if (debug_infrun)
    fprintf_unfiltered (gdb_stdlog,
"infrun: stepped to a different line\n");
  end_stepping_range (ecs);
  return;
}
...
because current_line and current_symtab have initial values:
...
(gdb) p ecs->event_thread->current_line
$8 = 0
(gdb) p ecs->event_thread->current_symtab
$9 = (symtab *) 0x0
...

Fix this in follow_fork by copying current_line and current_symtab from
parent thread to child thread.

Tested on x86_64-linux, with gcc 7.5.0 and gcc 10.0.1.

gdb/ChangeLog:

2020-05-08  Tom de Vries  <tdevries@suse.de>

* infrun.c (follow_fork): Copy current_line and current_symtab to
child thread.

4 years ago[gdb/testsuite] Add gdb.dwarf2/clang-debug-names.c
Tom de Vries [Fri, 8 May 2020 14:24:09 +0000 (16:24 +0200)]
[gdb/testsuite] Add gdb.dwarf2/clang-debug-names.c

Add test-case with .debug_names section using DW_FORM_ref4.

There's currently no support for .debug_names in the dwarf assembler, so we
use plain _emit rather than something more structured.

Consequently, we cannot use regular declare_labels-generated labels to refer
from .debug_names to .debug_info.  Instead, we use labels with a
predefined name, which we generate using _compute_label, and then define using
define_label.

This is the test-case for PR25952, so kfail the corresponding test.

Tested on x86_64-linux.

gdb/testsuite/ChangeLog:

2020-05-08  Tom de Vries  <tdevries@suse.de>

* gdb.dwarf2/clang-debug-names.c: New test.
* gdb.dwarf2/clang-debug-names.exp: New file.

4 years agoAutomatic date update in version.in
GDB Administrator [Fri, 8 May 2020 00:00:14 +0000 (00:00 +0000)]
Automatic date update in version.in

4 years agogdb: small cleanup of async-event.c structs
Simon Marchi [Thu, 7 May 2020 15:41:45 +0000 (11:41 -0400)]
gdb: small cleanup of async-event.c structs

This is a small cleanup to normalize the structures in async-event.c
with the rest of the code base:

- Remove the unnecessary typedefs
- Fix indentation of struct bodies
- Put comments above fields

No functional changes expected.

gdb/ChangeLog:

* async-event.c (struct async_signal_handler, struct
async_event_handler): Reformat, remove typedef.

4 years agogdb: remove TYPE_DYN_PROP_LIST macro
Simon Marchi [Thu, 7 May 2020 15:18:42 +0000 (11:18 -0400)]
gdb: remove TYPE_DYN_PROP_LIST macro

Remove this macro, which abstracts how to obtain the dyn_prop_list of a
given type.  We could replace it with a method on `struct type`, but I
don't think it's needed, as the only code that accesses the dynamic prop
list directly is internal gdbtypes.c code (that can be seen as code
internal to `struct type`).  So it can just refer to the field directly.

gdb/ChangeLog:

* gdbtypes.h (TYPE_DYN_PROP_LIST): Remove.  Update all users
access thistype->main_type->dyn_prop_list directly.

4 years agogdb: make remove_dyn_prop a method of struct type
Simon Marchi [Thu, 7 May 2020 15:08:54 +0000 (11:08 -0400)]
gdb: make remove_dyn_prop a method of struct type

Move remove_dyn_prop, currently a free function, to be a method of
struct type.

gdb/ChangeLog:

* gdbtypes.h (struct type) <remove_dyn_prop>: New method.
(remove_dyn_prop): Remove.  Update all users to use
type::remove_dyn_prop.
* gdbtypes.c (remove_dyn_prop): Rename to...
(type::remove_dyn_prop): ... this.

4 years agogdb: make add_dyn_prop a method of struct type
Simon Marchi [Thu, 7 May 2020 15:17:33 +0000 (11:17 -0400)]
gdb: make add_dyn_prop a method of struct type

Move add_dyn_prop, currently a free function, to be a method of struct
type.

gdb/ChangeLog:

* gdbtypes.h (struct type) <add_dyn_prop>: New method.
(add_dyn_prop): Remove.  Update all users to use
type::add_dyn_prop.
* gdbtypes.c (add_dyn_prop): Rename to...
(type::add_dyn_prop): ... this.

4 years agogdb: make get_dyn_prop a method of struct type
Simon Marchi [Thu, 7 May 2020 15:32:25 +0000 (11:32 -0400)]
gdb: make get_dyn_prop a method of struct type

Move get_dyn_prop, currently a free function, to be a method on struct
type.

gdb/ChangeLog:

* gdbtypes.h (struct type) <get_dyn_prop>: New method.
(get_dyn_prop): Remove.  Update all users to use
type::dyn_prop.
* gdbtypes.c (get_dyn_prop): Rename to...
(type::dyn_prop): ... this.

4 years agoobjcopy: Mention 'entry address' in description
Andrew Burgess [Tue, 5 May 2020 14:48:13 +0000 (15:48 +0100)]
objcopy: Mention 'entry address' in description

The ELF header contains a start address, which is also sometimes
called the entry address.  The 'objdump -x' output calls this field
the 'start address', while readelf calls it 'entry point address'.
The linker talks about setting the 'entry' point in its manual.

I've always thought of this field as the 'entry address', and so when
I recently wanted to know if objcopy could adjust this field I opened
up the manual and searched for 'entry', which found no hits.

I thought it would be useful (for people like me) if the description
of 'set-start' and 'adjust-start' in the objcopy manual mentioned the
word 'entry' to make it easier to find.

binutils/ChangeLog:

* doc/binutils.texi: Mention 'entry address' in the set-start and
adjust-start options descriptions.

4 years agoUpdated French translation for the gprof sub-directory.
Nick Clifton [Thu, 7 May 2020 09:48:21 +0000 (10:48 +0100)]
Updated French translation for the gprof sub-directory.

4 years agoAutomatic date update in version.in
GDB Administrator [Thu, 7 May 2020 00:00:12 +0000 (00:00 +0000)]
Automatic date update in version.in

4 years agogdb: remove main_type::flag_static
Simon Marchi [Wed, 6 May 2020 16:26:05 +0000 (12:26 -0400)]
gdb: remove main_type::flag_static

It is not used.

gdb/ChangeLog:

* gdbtypes.h (struct main_type) <flag_static>: Remove.

4 years agogdb: handle endbr64 instruction in amd64_analyze_prologue
Simon Marchi [Wed, 6 May 2020 16:01:37 +0000 (12:01 -0400)]
gdb: handle endbr64 instruction in amd64_analyze_prologue

v2:
  - test: build full executable instead of object
  - test: add and use supports_fcf_protection
  - test: use gdb_test_multiple's -wrap option
  - test: don't execute gdb_assert if failed to get breakpoint address

Some GCCs now enable -fcf-protection by default.  This is the case, for
example, with GCC 9.3.0 on Ubuntu 20.04.  Enabling it causes the
`endbr64` instruction to be inserted at the beginning of all functions
and that breaks GDB's prologue analysis.

I noticed this because it gives many failures in gdb.base/break.exp.
But let's take this dummy program and put a breakpoint on main:

    int main(void)
    {
        return 0;
    }

Without -fcf-protection, the breakpoint is correctly put after the prologue:

    $ gcc test.c -g3 -O0 -fcf-protection=none
    $ ./gdb -q -nx --data-directory=data-directory a.out
    Reading symbols from a.out...
    (gdb) disassemble main
    Dump of assembler code for function main:
       0x0000000000001129 <+0>:     push   %rbp
       0x000000000000112a <+1>:     mov    %rsp,%rbp
       0x000000000000112d <+4>:     mov    $0x0,%eax
       0x0000000000001132 <+9>:     pop    %rbp
       0x0000000000001133 <+10>:    retq
    End of assembler dump.
    (gdb) b main
    Breakpoint 1 at 0x112d: file test.c, line 3.

With -fcf-protection, the breakpoint is incorrectly put on the first
byte of the function:

    $ gcc test.c -g3 -O0 -fcf-protection=full
    $ ./gdb -q -nx --data-directory=data-directory a.out
    Reading symbols from a.out...
    (gdb) disassemble main
    Dump of assembler code for function main:
       0x0000000000001129 <+0>:     endbr64
       0x000000000000112d <+4>:     push   %rbp
       0x000000000000112e <+5>:     mov    %rsp,%rbp
       0x0000000000001131 <+8>:     mov    $0x0,%eax
       0x0000000000001136 <+13>:    pop    %rbp
       0x0000000000001137 <+14>:    retq
    End of assembler dump.
    (gdb) b main
    Breakpoint 1 at 0x1129: file test.c, line 2.

Stepping in amd64_skip_prologue, we can see that the prologue analysis,
for GCC-compiled programs, is done in amd64_analyze_prologue by decoding
the instructions and looking for typical patterns.  This patch changes
the analysis to check for a prologue starting with the `endbr64`
instruction, and skip it if it's there.

gdb/ChangeLog:

* amd64-tdep.c (amd64_analyze_prologue): Check for `endbr64`
instruction, skip it if it's there.

gdb/testsuite/ChangeLog:

* gdb.arch/amd64-prologue-skip-cf-protection.exp: New file.
* gdb.arch/amd64-prologue-skip-cf-protection.c: New file.

4 years agoUpdated Swedish translation for the gas sub-directory
Nick Clifton [Wed, 6 May 2020 13:17:36 +0000 (14:17 +0100)]
Updated Swedish translation for the gas sub-directory