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Mon, 29 Jan 2024 09:34:20 +0000 Received: from smtpav04.fra02v.mail.ibm.com (smtpav04.fra02v.mail.ibm.com [10.20.54.103]) by smtprelay03.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 40T9YIGH24314388 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 29 Jan 2024 09:34:18 GMT Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1870D20043; Mon, 29 Jan 2024 09:34:18 +0000 (GMT) Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7E2DF20040; Mon, 29 Jan 2024 09:34:17 +0000 (GMT) Received: from heavy.ibm.com (unknown [9.179.7.240]) by smtpav04.fra02v.mail.ibm.com (Postfix) with ESMTP; Mon, 29 Jan 2024 09:34:17 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=EMJdS9hKoA7kur7DqvESiD5ICfk5HChs5chrzcRw4VA=; b=iKiG6O065kT97uCxVSERS2RUqwr84bZ5G8ph6PkYQMh4W525rQfTDuTSn8NhhVTxzV6G fmRoaX7wKpsWuJfYMsresSzCtNSCEwpK2rG5LKsK4S2XSBKglXNM9FTNx1HEy53qB7jx Vd+ToIuBIVppy2//ilGKBIl+AKjc+Nv7MTYDuM+sMS8qcRRsfGepwZRVT5FH0FKq4lek wAFGM5oXFKZ66jjxyABF0qHS8z9tNIRFWRiyiQ/TukPCySwWXD4AOWvX/+jGbC18+grv fx4LhyEN7naOX12OThZz+TO7K9uDRVW2YSzNPC2qY/WQ3XFvQ+61gvuRn8HoKF8yDYZJ ew== From: Ilya Leoshkevich To: Richard Henderson , Peter Maydell , =?UTF-8?q?Alex=20Benn=C3=A9e?= , David Hildenbrand Cc: Paolo Bonzini , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , qemu-devel@nongnu.org, qemu-arm@nongnu.org, qemu-s390x@nongnu.org, Ilya Leoshkevich Subject: [PATCH v4 1/3] linux-user: Allow gdbstub to ignore page protection Date: Mon, 29 Jan 2024 10:32:14 +0100 Message-ID: <20240129093410.3151-2-iii@linux.ibm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240129093410.3151-1-iii@linux.ibm.com> References: <20240129093410.3151-1-iii@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-GUID: R7YmqST-Dcuiy1Fw9vbI2XzNZPN04mln X-Proofpoint-ORIG-GUID: wgwPKY-5wCbwjbq3D4rqeYil9sWISlbA X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-01-29_05,2024-01-25_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 spamscore=0 mlxlogscore=951 mlxscore=0 phishscore=0 bulkscore=0 suspectscore=0 adultscore=0 clxscore=1015 lowpriorityscore=0 malwarescore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2401290068 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=148.163.158.5; envelope-from=iii@linux.ibm.com; helo=mx0b-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @ibm.com) X-ZM-MESSAGEID: 1706520951869100001 Content-Type: text/plain; charset="utf-8" gdbserver ignores page protection by virtue of using /proc/$pid/mem. Teach qemu gdbstub to do this too. This will not work if /proc is not mounted; accept this limitation. One alternative is to temporarily grant the missing PROT_* bit, but this is inherently racy. Another alternative is self-debugging with ptrace(POKE), which will break if QEMU itself is being debugged - a much more severe limitation. Reviewed-by: Richard Henderson Signed-off-by: Ilya Leoshkevich --- cpu-target.c | 78 ++++++++++++++++++++++++++++++++++++++++++---------- 1 file changed, 63 insertions(+), 15 deletions(-) diff --git a/cpu-target.c b/cpu-target.c index f6e07c3deb1..958d63e8823 100644 --- a/cpu-target.c +++ b/cpu-target.c @@ -382,6 +382,9 @@ int cpu_memory_rw_debug(CPUState *cpu, vaddr addr, vaddr l, page; void * p; uint8_t *buf =3D ptr; + ssize_t written; + int ret =3D -1; + int fd =3D -1; =20 while (len > 0) { page =3D addr & TARGET_PAGE_MASK; @@ -389,30 +392,75 @@ int cpu_memory_rw_debug(CPUState *cpu, vaddr addr, if (l > len) l =3D len; flags =3D page_get_flags(page); - if (!(flags & PAGE_VALID)) - return -1; + if (!(flags & PAGE_VALID)) { + goto out_close; + } if (is_write) { - if (!(flags & PAGE_WRITE)) - return -1; - /* XXX: this code should not depend on lock_user */ - if (!(p =3D lock_user(VERIFY_WRITE, addr, l, 0))) - return -1; - memcpy(p, buf, l); - unlock_user(p, addr, l); - } else { - if (!(flags & PAGE_READ)) - return -1; + if (flags & PAGE_WRITE) { + /* XXX: this code should not depend on lock_user */ + p =3D lock_user(VERIFY_WRITE, addr, l, 0); + if (!p) { + goto out_close; + } + memcpy(p, buf, l); + unlock_user(p, addr, l); + } else { + /* Bypass the host page protection using ptrace. */ + if (fd =3D=3D -1) { + fd =3D open("/proc/self/mem", O_WRONLY); + if (fd =3D=3D -1) { + goto out; + } + } + /* + * If there is a TranslationBlock and we weren't bypassing= the + * host page protection, the memcpy() above would SEGV, + * ultimately leading to page_unprotect(). So invalidate t= he + * translations manually. Both invalidation and pwrite() m= ust + * be under mmap_lock() in order to prevent the creation of + * another TranslationBlock in between. + */ + mmap_lock(); + tb_invalidate_phys_range(addr, addr + l - 1); + written =3D pwrite(fd, buf, l, + (off_t)(uintptr_t)g2h_untagged(addr)); + mmap_unlock(); + if (written !=3D l) { + goto out_close; + } + } + } else if (flags & PAGE_READ) { /* XXX: this code should not depend on lock_user */ - if (!(p =3D lock_user(VERIFY_READ, addr, l, 1))) - return -1; + p =3D lock_user(VERIFY_READ, addr, l, 1); + if (!p) { + goto out_close; + } memcpy(buf, p, l); unlock_user(p, addr, 0); + } else { + /* Bypass the host page protection using ptrace. */ + if (fd =3D=3D -1) { + fd =3D open("/proc/self/mem", O_RDONLY); + if (fd =3D=3D -1) { + goto out; + } + } + if (pread(fd, buf, l, + (off_t)(uintptr_t)g2h_untagged(addr)) !=3D l) { + goto out_close; + } } len -=3D l; buf +=3D l; addr +=3D l; } - return 0; + ret =3D 0; +out_close: + if (fd !=3D -1) { + close(fd); + } +out: + return ret; } #endif =20 --=20 2.43.0 From nobody Tue Nov 26 15:33:17 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; 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; dmarc=pass(p=reject dis=none) header.from=linux.ibm.com ARC-Seal: i=1; a=rsa-sha256; t=1706520954; cv=none; d=zohomail.com; s=zohoarc; b=Voqi+VGv9DIk+IS/pWCYom9IlARuVsQHErcL+jmnD1JIhBffxkX+YZFFbagXIwucIFdzUdwBcG2qQUIxFQ+FTFE2UNsSazkY3N7NARxBOWzz6eZAaXidbxDnVn2RN2+6xSVi5jKUYjDTMZdgFaQrlXrHQ+iJO3TFsjSDNVPbFs4= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1706520954; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=jI6pEjgXLL7VhelI4BMQ2Uu80z6wLvQO3ypaqXKTrGo=; 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Mon, 29 Jan 2024 09:34:22 GMT Received: from smtprelay01.fra02v.mail.ibm.com ([9.218.2.227]) by ppma12.dal12v.mail.ibm.com (PPS) with ESMTPS id 3vwc5symug-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 29 Jan 2024 09:34:22 +0000 Received: from smtpav04.fra02v.mail.ibm.com (smtpav04.fra02v.mail.ibm.com [10.20.54.103]) by smtprelay01.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 40T9YKcJ8454740 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 29 Jan 2024 09:34:20 GMT Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6A04220040; Mon, 29 Jan 2024 09:34:20 +0000 (GMT) Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C7DE22004B; Mon, 29 Jan 2024 09:34:19 +0000 (GMT) Received: from heavy.ibm.com (unknown [9.179.7.240]) by smtpav04.fra02v.mail.ibm.com (Postfix) with ESMTP; Mon, 29 Jan 2024 09:34:19 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=jI6pEjgXLL7VhelI4BMQ2Uu80z6wLvQO3ypaqXKTrGo=; b=R++Hl+aIWiZ9XbIFEZdlTFgldRIdwcrqkA3jNmzJNqtrZV3EUsd6I0w60cQgEhkfZrNt cBuLnE+SlNubIEnRgDw0y1KwVs10P6c/u1hD68JGAVv039i5zomzxgePJXeAdYJMp2LL FBeFbpkXi3VrCVPAhDPl1hGTWBx83BfS2SqDBFL0/t38v9/RNAV8hscaAYTAaTLlbodD TUN21d26rYkqEfDD+Mjz8HG6Ua8nEv7wneGoQhttSAJpharmA5CaCTAcTkpUxUG7SM3t 7grbDCsPciJi7gH3/Oro5V8h2f0K4BzkvbzuTGmHTFdvPgJf82CCGXX9Mao8WR7vxB2x IQ== From: Ilya Leoshkevich To: Richard Henderson , Peter Maydell , =?UTF-8?q?Alex=20Benn=C3=A9e?= , David Hildenbrand Cc: Paolo Bonzini , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , qemu-devel@nongnu.org, qemu-arm@nongnu.org, qemu-s390x@nongnu.org, Ilya Leoshkevich Subject: [PATCH v4 2/3] tests/tcg: Factor out gdbstub test functions Date: Mon, 29 Jan 2024 10:32:15 +0100 Message-ID: <20240129093410.3151-3-iii@linux.ibm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240129093410.3151-1-iii@linux.ibm.com> References: <20240129093410.3151-1-iii@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-GUID: ihCyClUxxWIuHx29o4XNQZ1UqKhQXbeR X-Proofpoint-ORIG-GUID: sZcYumcz3uMNMRm7ctYPzm6z61csqSfv X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-01-29_05,2024-01-25_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 bulkscore=0 adultscore=0 clxscore=1015 spamscore=0 mlxlogscore=988 phishscore=0 suspectscore=0 impostorscore=0 priorityscore=1501 mlxscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2401290068 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=148.163.156.1; envelope-from=iii@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @ibm.com) X-ZM-MESSAGEID: 1706520955908100007 Content-Type: text/plain; charset="utf-8" Both the report() function as well as the initial gdbstub test sequence are copy-pasted into ~10 files with slight modifications. This indicates that they are indeed generic, so factor them out. While at it, add a few newlines to make the formatting closer to PEP-8. Signed-off-by: Ilya Leoshkevich Reviewed-by: Alex Benn=C3=A9e --- tests/guest-debug/run-test.py | 7 ++- tests/guest-debug/test_gdbstub.py | 60 +++++++++++++++++++ tests/tcg/aarch64/gdbstub/test-sve-ioctl.py | 34 +---------- tests/tcg/aarch64/gdbstub/test-sve.py | 33 +--------- tests/tcg/multiarch/gdbstub/interrupt.py | 47 ++------------- tests/tcg/multiarch/gdbstub/memory.py | 41 +------------ tests/tcg/multiarch/gdbstub/registers.py | 41 ++----------- tests/tcg/multiarch/gdbstub/sha1.py | 40 ++----------- .../multiarch/gdbstub/test-proc-mappings.py | 39 +----------- .../multiarch/gdbstub/test-qxfer-auxv-read.py | 37 +----------- .../gdbstub/test-thread-breakpoint.py | 37 +----------- tests/tcg/s390x/gdbstub/test-signals-s390x.py | 42 +------------ tests/tcg/s390x/gdbstub/test-svc.py | 39 +----------- 13 files changed, 100 insertions(+), 397 deletions(-) create mode 100644 tests/guest-debug/test_gdbstub.py diff --git a/tests/guest-debug/run-test.py b/tests/guest-debug/run-test.py index b13b27d4b19..368ff8a8903 100755 --- a/tests/guest-debug/run-test.py +++ b/tests/guest-debug/run-test.py @@ -97,7 +97,12 @@ def log(output, msg): sleep(1) log(output, "GDB CMD: %s" % (gdb_cmd)) =20 - result =3D subprocess.call(gdb_cmd, shell=3DTrue, stdout=3Doutput, std= err=3Dstderr) + gdb_env =3D dict(os.environ) + gdb_pythonpath =3D gdb_env.get("PYTHONPATH", "").split(os.pathsep) + gdb_pythonpath.append(os.path.dirname(os.path.realpath(__file__))) + gdb_env["PYTHONPATH"] =3D os.pathsep.join(gdb_pythonpath) + result =3D subprocess.call(gdb_cmd, shell=3DTrue, stdout=3Doutput, std= err=3Dstderr, + env=3Dgdb_env) =20 # A result of greater than 128 indicates a fatal signal (likely a # crash due to gdb internal failure). That's a problem for GDB and diff --git a/tests/guest-debug/test_gdbstub.py b/tests/guest-debug/test_gdb= stub.py new file mode 100644 index 00000000000..7f71d34da16 --- /dev/null +++ b/tests/guest-debug/test_gdbstub.py @@ -0,0 +1,60 @@ +"""Helper functions for gdbstub testing + +""" +from __future__ import print_function +import gdb +import os +import sys +import traceback + +fail_count =3D 0 + + +def report(cond, msg): + """Report success/fail of a test""" + if cond: + print("PASS: {}".format(msg)) + else: + print("FAIL: {}".format(msg)) + global fail_count + fail_count +=3D 1 + + +def main(test, expected_arch=3DNone): + """Run a test function + + 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: {}".format(arch.name())) + if expected_arch is not None: + report(arch.name() =3D=3D expected_arch, + "connected to {}".format(expected_arch)) + except (gdb.error, AttributeError): + print("SKIP: not connected") + exit(0) + + if gdb.parse_and_eval("$pc") =3D=3D 0: + print("SKIP: PC not set") + exit(0) + + try: + test() + except: + print("GDB Exception:") + traceback.print_exc(file=3Dsys.stdout) + global fail_count + fail_count +=3D 1 + if "QEMU_TEST_INTERACTIVE" in os.environ: + import code + code.InteractiveConsole(locals=3Dglobals()).interact() + raise + + try: + gdb.execute("kill") + except gdb.error: + pass + + print("All tests complete: {} failures".format(fail_count)) + exit(fail_count) diff --git a/tests/tcg/aarch64/gdbstub/test-sve-ioctl.py b/tests/tcg/aarch6= 4/gdbstub/test-sve-ioctl.py index ee8d467e59d..a78a3a2514d 100644 --- a/tests/tcg/aarch64/gdbstub/test-sve-ioctl.py +++ b/tests/tcg/aarch64/gdbstub/test-sve-ioctl.py @@ -8,19 +8,10 @@ # =20 import gdb -import sys +from test_gdbstub import main, report =20 initial_vlen =3D 0 -failcount =3D 0 =20 -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 =20 class TestBreakpoint(gdb.Breakpoint): def __init__(self, sym_name=3D"__sve_ld_done"): @@ -64,26 +55,5 @@ def run_test(): =20 gdb.execute("c") =20 -# -# This runs as the script it sourced (via -x, via run-test.py) -# -try: - inferior =3D gdb.selected_inferior() - arch =3D inferior.architecture() - report(arch.name() =3D=3D "aarch64", "connected to aarch64") -except (gdb.error, AttributeError): - print("SKIPPING (not connected)", file=3Dsys.stderr) - exit(0) - -try: - # Run the actual tests - run_test() -except: - print ("GDB Exception: %s" % (sys.exc_info()[0])) - failcount +=3D 1 - import code - code.InteractiveConsole(locals=3Dglobals()).interact() - raise =20 -print("All tests complete: %d failures" % failcount) -exit(failcount) +main(run_test, expected_arch=3D"aarch64") diff --git a/tests/tcg/aarch64/gdbstub/test-sve.py b/tests/tcg/aarch64/gdbs= tub/test-sve.py index afd8ece98dd..84cdcd4a32e 100644 --- a/tests/tcg/aarch64/gdbstub/test-sve.py +++ b/tests/tcg/aarch64/gdbstub/test-sve.py @@ -6,20 +6,10 @@ # =20 import gdb -import sys +from test_gdbstub import main, report =20 MAGIC =3D 0xDEADBEEF =20 -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 =20 def run_test(): "Run through the tests one by one" @@ -54,24 +44,5 @@ def run_test(): report(str(v.type) =3D=3D "uint64_t", "size of %s" % (reg)) report(int(v) =3D=3D MAGIC, "%s is 0x%x" % (reg, MAGIC)) =20 -# -# This runs as the script it sourced (via -x, via run-test.py) -# -try: - inferior =3D gdb.selected_inferior() - arch =3D inferior.architecture() - report(arch.name() =3D=3D "aarch64", "connected to aarch64") -except (gdb.error, AttributeError): - print("SKIPPING (not connected)", file=3Dsys.stderr) - exit(0) - -try: - # Run the actual tests - run_test() -except: - print ("GDB Exception: %s" % (sys.exc_info()[0])) - failcount +=3D 1 - -print("All tests complete: %d failures" % failcount) =20 -exit(failcount) +main(run_test, expected_arch=3D"aarch64") diff --git a/tests/tcg/multiarch/gdbstub/interrupt.py b/tests/tcg/multiarch= /gdbstub/interrupt.py index c016e7afbbf..90a45b5140a 100644 --- a/tests/tcg/multiarch/gdbstub/interrupt.py +++ b/tests/tcg/multiarch/gdbstub/interrupt.py @@ -8,19 +8,7 @@ # =20 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 +from test_gdbstub import main, report =20 =20 def check_interrupt(thread): @@ -59,6 +47,9 @@ def run_test(): Test if interrupting the code always lands us on the same thread when running with scheduler-lock enabled. """ + if len(gdb.selected_inferior().threads()) =3D=3D 1: + print("SKIP: set to run on a single thread") + exit(0) =20 gdb.execute("set scheduler-locking on") for thread in gdb.selected_inferior().threads(): @@ -66,32 +57,4 @@ def run_test(): "thread %d resumes correctly on interrupt" % thread.num) =20 =20 -# -# 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('$pc') =3D=3D 0: - print("SKIP: PC not set") - exit(0) -if len(gdb.selected_inferior().threads()) =3D=3D 1: - print("SKIP: set to run on a single thread") - exit(0) - -try: - # Run the actual tests - run_test() -except (gdb.error): - print("GDB Exception: %s" % (sys.exc_info()[0])) - failcount +=3D 1 - pass - -# Finally kill the inferior and exit gdb with a count of failures -gdb.execute("kill") -exit(failcount) +main(run_test) diff --git a/tests/tcg/multiarch/gdbstub/memory.py b/tests/tcg/multiarch/gd= bstub/memory.py index fb1d06b7bb7..532b92e7fb3 100644 --- a/tests/tcg/multiarch/gdbstub/memory.py +++ b/tests/tcg/multiarch/gdbstub/memory.py @@ -9,18 +9,7 @@ =20 import gdb import sys - -failcount =3D 0 - - -def report(cond, msg): - "Report success/fail of test" - if cond: - print("PASS: %s" % (msg)) - else: - print("FAIL: %s" % (msg)) - global failcount - failcount +=3D 1 +from test_gdbstub import main, report =20 =20 def check_step(): @@ -99,29 +88,5 @@ def run_test(): =20 report(cbp.hit_count =3D=3D 0, "didn't reach backstop") =20 -# -# This runs as the script it sourced (via -x, via run-test.py) -# -try: - inferior =3D gdb.selected_inferior() - arch =3D inferior.architecture() - print("ATTACHED: %s" % arch.name()) -except (gdb.error, AttributeError): - print("SKIPPING (not connected)", file=3Dsys.stderr) - exit(0) - -if gdb.parse_and_eval('$pc') =3D=3D 0: - print("SKIP: PC not set") - exit(0) - -try: - # Run the actual tests - run_test() -except (gdb.error): - print("GDB Exception: %s" % (sys.exc_info()[0])) - failcount +=3D 1 - pass - -# Finally kill the inferior and exit gdb with a count of failures -gdb.execute("kill") -exit(failcount) + +main(run_test) diff --git a/tests/tcg/multiarch/gdbstub/registers.py b/tests/tcg/multiarch= /gdbstub/registers.py index 688c0611072..b3d13cb077f 100644 --- a/tests/tcg/multiarch/gdbstub/registers.py +++ b/tests/tcg/multiarch/gdbstub/registers.py @@ -7,20 +7,11 @@ # SPDX-License-Identifier: GPL-2.0-or-later =20 import gdb -import sys import xml.etree.ElementTree as ET +from test_gdbstub import main, report =20 -initial_vlen =3D 0 -failcount =3D 0 =20 -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 +initial_vlen =3D 0 =20 =20 def fetch_xml_regmap(): @@ -75,6 +66,7 @@ def fetch_xml_regmap(): =20 return reg_map =20 + def get_register_by_regnum(reg_map, regnum): """ Helper to find a register from the map via its XML regnum @@ -84,6 +76,7 @@ def get_register_by_regnum(reg_map, regnum): return entry return None =20 + def crosscheck_remote_xml(reg_map): """ Cross-check the list of remote-registers with the XML info. @@ -144,6 +137,7 @@ def crosscheck_remote_xml(reg_map): elif "seen" not in x_reg: print(f"{x_reg} wasn't seen in remote-registers") =20 + def initial_register_read(reg_map): """ Do an initial read of all registers that we know gdb cares about @@ -214,27 +208,4 @@ def run_test(): complete_and_diff(reg_map) =20 =20 -# -# 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('$pc') =3D=3D 0: - print("SKIP: PC not set") - exit(0) - -try: - run_test() -except (gdb.error): - print ("GDB Exception: %s" % (sys.exc_info()[0])) - failcount +=3D 1 - pass - -print("All tests complete: %d failures" % failcount) -exit(failcount) +main(run_test) diff --git a/tests/tcg/multiarch/gdbstub/sha1.py b/tests/tcg/multiarch/gdbs= tub/sha1.py index 416728415f9..1ce711a402c 100644 --- a/tests/tcg/multiarch/gdbstub/sha1.py +++ b/tests/tcg/multiarch/gdbstub/sha1.py @@ -7,19 +7,11 @@ # =20 import gdb -import sys +from test_gdbstub import main, report + =20 initial_vlen =3D 0 -failcount =3D 0 =20 -def report(cond, msg): - "Report success/fail of test" - if cond: - print("PASS: %s" % (msg)) - else: - print("FAIL: %s" % (msg)) - global failcount - failcount +=3D 1 =20 def check_break(sym_name): "Setup breakpoint, continue and check we stopped." @@ -35,6 +27,7 @@ def check_break(sym_name): =20 bp.delete() =20 + def run_test(): "Run through the tests one by one" =20 @@ -57,28 +50,5 @@ def run_test(): # finally check we don't barf inspecting registers gdb.execute("info registers") =20 -# -# This runs as the script it sourced (via -x, via run-test.py) -# -try: - inferior =3D gdb.selected_inferior() - arch =3D inferior.architecture() - print("ATTACHED: %s" % arch.name()) -except (gdb.error, AttributeError): - print("SKIPPING (not connected)", file=3Dsys.stderr) - exit(0) - -if gdb.parse_and_eval('$pc') =3D=3D 0: - print("SKIP: PC not set") - exit(0) - -try: - # 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) + +main(run_test) diff --git a/tests/tcg/multiarch/gdbstub/test-proc-mappings.py b/tests/tcg/= multiarch/gdbstub/test-proc-mappings.py index 04ec61d2197..564613fabf0 100644 --- a/tests/tcg/multiarch/gdbstub/test-proc-mappings.py +++ b/tests/tcg/multiarch/gdbstub/test-proc-mappings.py @@ -3,20 +3,7 @@ This runs as a sourced script (via -x, via run-test.py).""" from __future__ import print_function import gdb -import sys - - -n_failures =3D 0 - - -def report(cond, msg): - """Report success/fail of a test""" - if cond: - print("PASS: {}".format(msg)) - else: - print("FAIL: {}".format(msg)) - global n_failures - n_failures +=3D 1 +from test_gdbstub import main, report =20 =20 def run_test(): @@ -37,26 +24,4 @@ def run_test(): # report("/sha1" in mappings, "Found the test binary name in the mappi= ngs") =20 =20 -def main(): - """Prepare the environment and run through the tests""" - try: - inferior =3D gdb.selected_inferior() - print("ATTACHED: {}".format(inferior.architecture().name())) - except (gdb.error, AttributeError): - print("SKIPPING (not connected)") - exit(0) - - if gdb.parse_and_eval('$pc') =3D=3D 0: - print("SKIP: PC not set") - exit(0) - - try: - # Run the actual tests - run_test() - except gdb.error: - report(False, "GDB Exception: {}".format(sys.exc_info()[0])) - print("All tests complete: %d failures" % n_failures) - exit(n_failures) - - -main() +main(run_test) diff --git a/tests/tcg/multiarch/gdbstub/test-qxfer-auxv-read.py b/tests/tc= g/multiarch/gdbstub/test-qxfer-auxv-read.py index 926fa962b77..00c26ab4a95 100644 --- a/tests/tcg/multiarch/gdbstub/test-qxfer-auxv-read.py +++ b/tests/tcg/multiarch/gdbstub/test-qxfer-auxv-read.py @@ -6,18 +6,8 @@ # =20 import gdb -import sys +from test_gdbstub import main, report =20 -failcount =3D 0 - -def report(cond, msg): - "Report success/fail of test" - if cond: - print ("PASS: %s" % (msg)) - else: - print ("FAIL: %s" % (msg)) - global failcount - failcount +=3D 1 =20 def run_test(): "Run through the tests one by one" @@ -26,28 +16,5 @@ def run_test(): report(isinstance(auxv, str), "Fetched auxv from inferior") report(auxv.find("sha1"), "Found test binary name in auxv") =20 -# -# This runs as the script it sourced (via -x, via run-test.py) -# -try: - inferior =3D gdb.selected_inferior() - arch =3D inferior.architecture() - print("ATTACHED: %s" % arch.name()) -except (gdb.error, AttributeError): - print("SKIPPING (not connected)", file=3Dsys.stderr) - exit(0) - -if gdb.parse_and_eval('$pc') =3D=3D 0: - print("SKIP: PC not set") - exit(0) - -try: - # Run the actual tests - run_test() -except (gdb.error): - print ("GDB Exception: %s" % (sys.exc_info()[0])) - failcount +=3D 1 - pass =20 -print("All tests complete: %d failures" % failcount) -exit(failcount) +main(run_test) diff --git a/tests/tcg/multiarch/gdbstub/test-thread-breakpoint.py b/tests/= tcg/multiarch/gdbstub/test-thread-breakpoint.py index e57d2a8db8b..4d6b6b9fbe7 100644 --- a/tests/tcg/multiarch/gdbstub/test-thread-breakpoint.py +++ b/tests/tcg/multiarch/gdbstub/test-thread-breakpoint.py @@ -6,18 +6,8 @@ # =20 import gdb -import sys +from test_gdbstub import main, report =20 -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 =20 def run_test(): "Run through the tests one by one" @@ -29,28 +19,5 @@ def run_test(): frame =3D gdb.selected_frame() report(str(frame.function()) =3D=3D "thread1_func", "break @ %s"%frame) =20 -# -# 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('$pc') =3D=3D 0: - print("SKIP: PC not set") - exit(0) - -try: - # Run the actual tests - run_test() -except (gdb.error): - print ("GDB Exception: %s" % (sys.exc_info()[0])) - failcount +=3D 1 - pass =20 -print("All tests complete: %d failures" % failcount) -exit(failcount) +main(run_test) diff --git a/tests/tcg/s390x/gdbstub/test-signals-s390x.py b/tests/tcg/s390= x/gdbstub/test-signals-s390x.py index ca2bbc0b03e..b6b7b39fc46 100644 --- a/tests/tcg/s390x/gdbstub/test-signals-s390x.py +++ b/tests/tcg/s390x/gdbstub/test-signals-s390x.py @@ -7,19 +7,7 @@ # =20 import gdb -import sys - -failcount =3D 0 - - -def report(cond, msg): - """Report success/fail of test""" - if cond: - print("PASS: %s" % (msg)) - else: - print("FAIL: %s" % (msg)) - global failcount - failcount +=3D 1 +from test_gdbstub import main, report =20 =20 def run_test(): @@ -42,31 +30,7 @@ def run_test(): gdb.Breakpoint("_exit") gdb.execute("c") status =3D int(gdb.parse_and_eval("$r2")) - report(status =3D=3D 0, "status =3D=3D 0"); - - -# -# 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("$pc") =3D=3D 0: - print("SKIP: PC not set") - exit(0) + report(status =3D=3D 0, "status =3D=3D 0") =20 -try: - # Run the actual tests - run_test() -except (gdb.error): - print("GDB Exception: %s" % (sys.exc_info()[0])) - failcount +=3D 1 - pass =20 -print("All tests complete: %d failures" % failcount) -exit(failcount) +main(run_test) diff --git a/tests/tcg/s390x/gdbstub/test-svc.py b/tests/tcg/s390x/gdbstub/= test-svc.py index 804705fede9..17210b4e020 100644 --- a/tests/tcg/s390x/gdbstub/test-svc.py +++ b/tests/tcg/s390x/gdbstub/test-svc.py @@ -3,20 +3,7 @@ This runs as a sourced script (via -x, via run-test.py).""" from __future__ import print_function import gdb -import sys - - -n_failures =3D 0 - - -def report(cond, msg): - """Report success/fail of a test""" - if cond: - print("PASS: {}".format(msg)) - else: - print("FAIL: {}".format(msg)) - global n_failures - n_failures +=3D 1 +from test_gdbstub import main, report =20 =20 def run_test(): @@ -35,26 +22,4 @@ def run_test(): gdb.execute("si") =20 =20 -def main(): - """Prepare the environment and run through the tests""" - try: - inferior =3D gdb.selected_inferior() - print("ATTACHED: {}".format(inferior.architecture().name())) - except (gdb.error, AttributeError): - print("SKIPPING (not connected)") - exit(0) - - if gdb.parse_and_eval('$pc') =3D=3D 0: - print("SKIP: PC not set") - exit(0) - - try: - # Run the actual tests - run_test() - except gdb.error: - report(False, "GDB Exception: {}".format(sys.exc_info()[0])) - print("All tests complete: %d failures" % n_failures) - exit(n_failures) - - -main() +main(run_test) --=20 2.43.0 From nobody Tue Nov 26 15:33:17 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; 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; dmarc=pass(p=reject dis=none) header.from=linux.ibm.com ARC-Seal: i=1; a=rsa-sha256; t=1706520932; cv=none; d=zohomail.com; s=zohoarc; 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b=AR83oh47LESTxXIcE6VZ0eyak6DyZyvRxykd/GknoVq46qIyHucjBGiqyLTiNpt1RuWu q7mkGvY9X7HVjZ+WJwPnIYURB5S41juGmTOkLsRgfzZ8jIO0w1r6tOYqVALBzsKJeM8v BRxb1lZ1FPAA0LRaHlPZdtnfSnXap9Df/gwd6+qF5fVROaW7X6VwtSLd1iz3Bg8cABaw AB9KvEJ6H0/MU8TKqFN+AZKMm9em8SRe4jox60X98Pwed6BfthB6hNfa3I5pznNsdr46 IuR3d7KyrKmJkoR77VPmc2HnnwWbxsNLXXOwYlMhdlUSdEOVhMjCoHJWXbVUpNRC+Sma gg== From: Ilya Leoshkevich To: Richard Henderson , Peter Maydell , =?UTF-8?q?Alex=20Benn=C3=A9e?= , David Hildenbrand Cc: Paolo Bonzini , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , qemu-devel@nongnu.org, qemu-arm@nongnu.org, qemu-s390x@nongnu.org, Ilya Leoshkevich Subject: [PATCH v4 3/3] tests/tcg: Add the PROT_NONE gdbstub test Date: Mon, 29 Jan 2024 10:32:16 +0100 Message-ID: <20240129093410.3151-4-iii@linux.ibm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240129093410.3151-1-iii@linux.ibm.com> References: <20240129093410.3151-1-iii@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 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-- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @ibm.com) X-ZM-MESSAGEID: 1706520934146100003 Content-Type: text/plain; charset="utf-8" Make sure that qemu gdbstub, like gdbserver, allows reading from and writing to PROT_NONE pages. Signed-off-by: Ilya Leoshkevich Acked-by: Alex Benn=C3=A9e --- tests/tcg/multiarch/Makefile.target | 9 +++++- tests/tcg/multiarch/gdbstub/prot-none.py | 36 +++++++++++++++++++++ tests/tcg/multiarch/prot-none.c | 40 ++++++++++++++++++++++++ 3 files changed, 84 insertions(+), 1 deletion(-) create mode 100644 tests/tcg/multiarch/gdbstub/prot-none.py create mode 100644 tests/tcg/multiarch/prot-none.c diff --git a/tests/tcg/multiarch/Makefile.target b/tests/tcg/multiarch/Make= file.target index d31ba8d6ae4..315a2e13588 100644 --- a/tests/tcg/multiarch/Makefile.target +++ b/tests/tcg/multiarch/Makefile.target @@ -101,13 +101,20 @@ run-gdbstub-registers: sha512 --bin $< --test $(MULTIARCH_SRC)/gdbstub/registers.py, \ checking register enumeration) =20 +run-gdbstub-prot-none: prot-none + $(call run-test, $@, env PROT_NONE_PY=3D1 $(GDB_SCRIPT) \ + --gdb $(GDB) \ + --qemu $(QEMU) --qargs "$(QEMU_OPTS)" \ + --bin $< --test $(MULTIARCH_SRC)/gdbstub/prot-none.py, \ + accessing PROT_NONE memory) + else run-gdbstub-%: $(call skip-test, "gdbstub test $*", "need working gdb with $(patsubst -%= ,,$(TARGET_NAME)) support") endif EXTRA_RUNS +=3D run-gdbstub-sha1 run-gdbstub-qxfer-auxv-read \ run-gdbstub-proc-mappings run-gdbstub-thread-breakpoint \ - run-gdbstub-registers + run-gdbstub-registers run-gdbstub-prot-none =20 # ARM Compatible Semi Hosting Tests # diff --git a/tests/tcg/multiarch/gdbstub/prot-none.py b/tests/tcg/multiarch= /gdbstub/prot-none.py new file mode 100644 index 00000000000..e829d3ebc5f --- /dev/null +++ b/tests/tcg/multiarch/gdbstub/prot-none.py @@ -0,0 +1,36 @@ +"""Test that GDB can access PROT_NONE pages. + +This runs as a sourced script (via -x, via run-test.py). + +SPDX-License-Identifier: GPL-2.0-or-later +""" +import ctypes +from test_gdbstub import main, report + + +def probe_proc_self_mem(): + buf =3D ctypes.create_string_buffer(b'aaa') + try: + with open("/proc/self/mem", "rb") as fp: + fp.seek(ctypes.addressof(buf)) + return fp.read(3) =3D=3D b'aaa' + except OSError: + return False + + +def run_test(): + """Run through the tests one by one""" + if not probe_proc_self_mem: + print("SKIP: /proc/self/mem is not usable") + exit(0) + gdb.Breakpoint("break_here") + gdb.execute("continue") + val =3D gdb.parse_and_eval("*(char[2] *)q").string() + report(val =3D=3D "42", "{} =3D=3D 42".format(val)) + gdb.execute("set *(char[3] *)q =3D \"24\"") + gdb.execute("continue") + exitcode =3D int(gdb.parse_and_eval("$_exitcode")) + report(exitcode =3D=3D 0, "{} =3D=3D 0".format(exitcode)) + + +main(run_test) diff --git a/tests/tcg/multiarch/prot-none.c b/tests/tcg/multiarch/prot-non= e.c new file mode 100644 index 00000000000..dc56aadb3c5 --- /dev/null +++ b/tests/tcg/multiarch/prot-none.c @@ -0,0 +1,40 @@ +/* + * Test that GDB can access PROT_NONE pages. + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ +#include +#include +#include +#include +#include + +void break_here(void *q) +{ +} + +int main(void) +{ + long pagesize =3D sysconf(_SC_PAGESIZE); + void *p, *q; + int err; + + p =3D mmap(NULL, pagesize * 2, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); + assert(p !=3D MAP_FAILED); + q =3D p + pagesize - 1; + strcpy(q, "42"); + + err =3D mprotect(p, pagesize * 2, PROT_NONE); + assert(err =3D=3D 0); + + break_here(q); + + err =3D mprotect(p, pagesize * 2, PROT_READ); + assert(err =3D=3D 0); + if (getenv("PROT_NONE_PY")) { + assert(strcmp(q, "24") =3D=3D 0); + } + + return EXIT_SUCCESS; +} --=20 2.43.0