From nobody Mon Feb 9 13:06:46 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1633008520001998.1535664929995; Thu, 30 Sep 2021 06:28:40 -0700 (PDT) Received: from localhost ([::1]:47838 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mVw73-0000kG-Lk for importer@patchew.org; Thu, 30 Sep 2021 09:28:37 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:37368) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mVsk9-0007HT-51 for qemu-devel@nongnu.org; Thu, 30 Sep 2021 05:52:45 -0400 Received: from holomatrix.labath.sk ([92.48.125.149]:53642) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mVsk6-00076N-Re for qemu-devel@nongnu.org; Thu, 30 Sep 2021 05:52:44 -0400 Received: from unimatrix0.localdomain (unknown [172.29.152.10]) by holomatrix.labath.sk (Postfix) with ESMTPS id 717477760C55; Thu, 30 Sep 2021 09:51:38 +0000 (GMT) Received: by unimatrix0.localdomain (Postfix, from userid 1000) id F34302940A9; Thu, 30 Sep 2021 11:51:37 +0200 (CEST) From: Pavel Labath To: qemu-devel@nongnu.org Subject: [PATCH] gdbstub: Switch to the thread receiving a signal Date: Thu, 30 Sep 2021 11:51:11 +0200 Message-Id: <20210930095111.23205-1-pavel@labath.sk> X-Mailer: git-send-email 2.32.0 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=92.48.125.149; envelope-from=pavel@labath.sk; helo=holomatrix.labath.sk X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Thu, 30 Sep 2021 09:20:08 -0400 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Pavel Labath , =?UTF-8?q?Alex=20Benn=C3=A9e?= Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZM-MESSAGEID: 1633008521731100001 Content-Type: text/plain; charset="utf-8" Respond with Txxthread:yyyy; instead of a plain Sxx to indicate which thread received the signal. Otherwise, the debugger will associate it with the main one. Also automatically select this thread, as that is what gdb expects. Signed-off-by: Pavel Labath --- gdbstub.c | 9 ++- tests/tcg/multiarch/Makefile.target | 7 +++ .../gdbstub/test-thread-breakpoint.py | 60 +++++++++++++++++++ 3 files changed, 74 insertions(+), 2 deletions(-) create mode 100644 tests/tcg/multiarch/gdbstub/test-thread-breakpoint.py diff --git a/gdbstub.c b/gdbstub.c index 36b85aa..7bd4479 100644 --- a/gdbstub.c +++ b/gdbstub.c @@ -3138,8 +3138,13 @@ gdb_handlesig(CPUState *cpu, int sig) tb_flush(cpu); =20 if (sig !=3D 0) { - snprintf(buf, sizeof(buf), "S%02x", target_signal_to_gdb(sig)); - put_packet(buf); + gdbserver_state.c_cpu =3D cpu; + gdbserver_state.g_cpu =3D cpu; + g_string_printf(gdbserver_state.str_buf, + "T%02xthread:", target_signal_to_gdb(sig)); + gdb_append_thread_id(cpu, gdbserver_state.str_buf); + g_string_append_c(gdbserver_state.str_buf, ';'); + put_strbuf(); } /* put_packet() might have detected that the peer terminated the connection. */ diff --git a/tests/tcg/multiarch/Makefile.target b/tests/tcg/multiarch/Make= file.target index 85a6fb7..c7b7e8b 100644 --- a/tests/tcg/multiarch/Makefile.target +++ b/tests/tcg/multiarch/Makefile.target @@ -73,6 +73,13 @@ run-gdbstub-qxfer-auxv-read: sha1 --bin $< --test $(MULTIARCH_SRC)/gdbstub/test-qxfer-auxv-read.py, \ "basic gdbstub qXfer:auxv:read support") =20 +run-gdbstub-thread-breakpoint: testthread + $(call run-test, $@, $(GDB_SCRIPT) \ + --gdb $(HAVE_GDB_BIN) \ + --qemu $(QEMU) --qargs "$(QEMU_OPTS)" \ + --bin $< --test $(MULTIARCH_SRC)/gdbstub/test-thread-breakpoint.py, \ + "hitting a breakpoint on non-main thread") + else run-gdbstub-%: $(call skip-test, "gdbstub test $*", "need working gdb") diff --git a/tests/tcg/multiarch/gdbstub/test-thread-breakpoint.py b/tests/= tcg/multiarch/gdbstub/test-thread-breakpoint.py new file mode 100644 index 0000000..798d508 --- /dev/null +++ b/tests/tcg/multiarch/gdbstub/test-thread-breakpoint.py @@ -0,0 +1,60 @@ +from __future__ import print_function +# +# Test auxiliary vector is loaded via gdbstub +# +# This is launched via tests/guest-debug/run-test.py +# + +import gdb +import sys + +failcount =3D 0 + +def report(cond, msg): + "Report success/fail of test" + if cond: + print ("PASS: %s" % (msg)) + else: + print ("FAIL: %s" % (msg)) + global failcount + failcount +=3D 1 + +def run_test(): + "Run through the tests one by one" + + sym, ok =3D gdb.lookup_symbol("thread1_func") + gdb.execute("b thread1_func") + gdb.execute("c") + + frame =3D gdb.selected_frame() + report(str(frame.function()) =3D=3D "thread1_func", "break @ %s"%frame) + +# +# This runs as the script it sourced (via -x, via run-test.py) +# +try: + inferior =3D gdb.selected_inferior() + arch =3D inferior.architecture() + print("ATTACHED: %s" % arch.name()) +except (gdb.error, AttributeError): + print("SKIPPING (not connected)", file=3Dsys.stderr) + exit(0) + +if gdb.parse_and_eval('$pc') =3D=3D 0: + print("SKIP: PC not set") + exit(0) + +try: + # These are not very useful in scripts + gdb.execute("set pagination off") + gdb.execute("set confirm off") + + # Run the actual tests + run_test() +except (gdb.error): + print ("GDB Exception: %s" % (sys.exc_info()[0])) + failcount +=3D 1 + pass + +print("All tests complete: %d failures" % failcount) +exit(failcount) --=20 2.32.0