From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from nx236.node02.secure-mailgate.com (nx236.node02.secure-mailgate.com [192.162.87.236]) by sourceware.org (Postfix) with ESMTPS id E6BF638618B6 for ; Wed, 31 Mar 2021 02:52:56 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org E6BF638618B6 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=trande.de Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=zied.guermazi@trande.de Received: from host202.checkdomain.de ([185.137.168.148]) by node02.secure-mailgate.com with esmtps (TLSv1.2:AES128-GCM-SHA256:128) (Exim 4.92) (envelope-from ) id 1lRQyU-004haJ-TJ for gdb-patches@sourceware.org; Wed, 31 Mar 2021 04:52:55 +0200 X-SecureMailgate-Identity: host202.checkdomain.de Received: from Trande0001.fritz.box (x4dbe5b1d.dyn.telefonica.de [77.190.91.29]) (Authenticated sender: zied.guermazi@trande.de) by host202.checkdomain.de (Postfix) with ESMTPSA id 53C122C17DF; Wed, 31 Mar 2021 04:52:54 +0200 (CEST) X-SecureMailgate-Identity: host202.checkdomain.de From: Zied Guermazi To: gdb-patches@sourceware.org Cc: Zied Guermazi Subject: [PATCH v3 0/7] extend branch tracing to use ARM CoreSight traces Date: Wed, 31 Mar 2021 04:52:27 +0200 Message-Id: <20210331025234.518688-1-zied.guermazi@trande.de> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-PPP-Message-ID: <20210331025254.3784697.6077@host202.checkdomain.de> X-PPP-Vhost: trande.de X-Originating-IP: 185.137.168.148 X-SecureMailgate-Domain: host202.checkdomain.de X-SecureMailgate-Username: 185.137.168.148 Authentication-Results: secure-mailgate.com; auth=pass smtp.auth=185.137.168.148@host202.checkdomain.de X-SecureMailgate-Outgoing-Class: ham X-SecureMailgate-Outgoing-Evidence: Combined (0.04) X-Recommended-Action: accept X-Filter-ID: Pt3MvcO5N4iKaDQ5O6lkdGlMVN6RH8bjRMzItlySaT92dTMEDWv0FpyARnZpnL1CPUtbdvnXkggZ 3YnVId/Y5jcf0yeVQAvfjHznO7+bT5wgSQOko5ya3orWH1MkzQXa2oPZqVS5i0KNMNtVCi0tRw/C h5SE4jAyhe1COeASyU8MguBY4c6DKXdBV09QlBeR4ld5rdi2ZxohSIq+dqifZqZB0VgKyzk1hxKn NCROVogVZjUFgdVrb53pIBbvvIldBVisGv8MyVI5ms3guyJnGvsZ59zoX/F2OVmfn/ypN1MUOled bu+r9+W9cDXvzL3SbmF9gLAXmENaESQRaF1a9BUePrEkthz/AkjSL3YY1rc+AwMXi+OSqQVvJeAt QeT9Q5MeWyHYFcw5tP/0jE4kl2Vgy64k7VOKE8LGVSqZUUeGBm2F2ZSc/GphP5KHuWIVyGcCgytU Mu2J9HJXA1Uo4GK9rNXrMwoTWcjWHnwp/pypDdbUeVhhRSNmbtZhZo/4pw1Bi8ttLThN67lnnreq FZ1IIYAHBv0PxorZCJ/m663fX8TdqEXkwxwMjsp2mNApxmkcSUh0usyB8UMm50tp+zWGMglYWa+x Zz4n7ByY2IAgr/U0flMcy2Vi/IcBgY4aIg2Wh441Iy/oD6wYf/J+JKWMwC0nw67UB6OskYLcqyVh 6X8dRmjxsEMD376E65eKXU3NxWagaVsOdlNJbYoKXFjWJaFX6AM8Sf6iAc98i1JX0rTI+5Yjb5A6 yyXgggLfKU9Y32E9fE/XH7XG2OJxuPtq3WpoR5lQ0LU/IZ2NCkeYJ/jQM/t9Sl0Y+QNWdn/Qc8Cb y1XfRezLvF6dS+BSD/P4wHlqBE95R7lrKCg7FGnTBppNTbYX2Pl9ZDIjHP3LGRzUT3tBoA/NwtBm id4QgOuK4q9FGLqw0uXi1jAgd708uRa/C9ZZrIITqq6pglVWfPvqlsY3ZAfovwHb3bg9WvUf9oDB qtClgM5jH/om1Q5bfFmsvt+9xZNiurJd4Yaqfb/08I7T4JveQXzz6X1UF1PxiyS9jcqrLDn7GLuL R/D4pTpxobFuL+e0fy34oD/dFk2QXR0pcnE0axI2jIHIygW3/AVBWvF+WByBawaHTiVQQhQ3cXtT qZg6zYv+9efs9Nqx2AbbYAO73tfvTX/QeA== X-Report-Abuse-To: spam@node04.secure-mailgate.com X-Spam-Status: No, score=-4.3 required=5.0 tests=BAYES_00, KAM_DMARC_STATUS, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: gdb-patches@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gdb-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 31 Mar 2021 02:53:05 -0000 This patch set adds support for branch tracing in GDB on arm platforms using coresight etm traces Branch tracing offers instructions and functions histories as well as execution record and replay (forwards and reverse debugging) this patch set was tested using the gdb.btrace testsuite on ARMv7 and ARMv8 cortex A processors running linux operating system with coresight drivers. test results of gdb.btrace testsuite on ARMv8, variation unix # of expected passes 595 # of unexpected failures 1 # of unsupported tests 1 test results of gdb.btrace testsuite on ARMv8 variation native-gdbserver # of expected passes 582 # of unexpected failures 4 # of unsupported tests 2 test results of gdb.btrace testsuite on ARMv7, variation unix test results of gdb.btrace testsuite on ARMv7 variation native-gdbserver known limitations: for arm v7 only - some registers needed for breakpoint address calculation in forwards executions may be missing. for arm v7 and arm v8 - sometimes trace buffers are not flushed properly or flushed in the buffer of a different thread. this was observed in test scripts only. - sometimes, in non-stop mode, while executing "stepi n" for two threads in parallel, a thread is hitting breakpoints intended for stepping the other one. Gdb recognizes that it is intended for the second thread, but decreases the step counter. leading to a stepping less than "n" times. patches are: Zied Guermazi (7): configure gdb build system for supporting btrace on arm processors add btrace coresight related commands start/stop btrace with coresight etm and parse etm buffer. nat independant start/stop btrace with coresight etm and collect etm buffer on linux os fix issue: gdb hangs in the command following a commad returning with TARGET_WAITKIND_NO_HISTORY add support for coresight btrace via remote protocol adapt btrace testcases for arm target gdb/ChangeLog | 139 +++ gdb/Makefile.in | 5 +- gdb/NEWS | 30 + gdb/aarch64-linux-nat.c | 68 ++ gdb/arch/arm.h | 33 + gdb/arm-linux-nat.c | 68 ++ gdb/btrace.c | 977 +++++++++++++++++- gdb/btrace.h | 16 +- gdb/config.in | 3 + gdb/configure | 545 ++++++++++ gdb/configure.nat | 4 +- gdb/doc/gdb.texinfo | 115 ++- gdb/features/btrace-conf.dtd | 10 +- gdb/features/btrace.dtd | 38 +- gdb/infrun.c | 3 +- gdb/nat/linux-btrace.c | 400 ++++++- gdb/nat/linux-btrace.h | 19 + gdb/record-btrace.c | 168 ++- gdb/record.c | 2 + gdb/remote.c | 66 +- .../gdb.btrace/aarch64-instruction_history.S | 31 + .../gdb.btrace/aarch64-record_goto.S | 400 +++++++ .../gdb.btrace/aarch64-tailcall-only.S | 517 +++++++++ gdb/testsuite/gdb.btrace/aarch64-tailcall.S | 409 ++++++++ .../gdb.btrace/arm-instruction_history.S | 31 + gdb/testsuite/gdb.btrace/arm-record_goto.S | 433 ++++++++ gdb/testsuite/gdb.btrace/arm-tailcall-only.S | 504 +++++++++ gdb/testsuite/gdb.btrace/arm-tailcall.S | 391 +++++++ gdb/testsuite/gdb.btrace/buffer-size.exp | 15 +- gdb/testsuite/gdb.btrace/delta.exp | 10 + .../gdb.btrace/instruction_history.exp | 107 +- gdb/testsuite/gdb.btrace/non-stop.exp | 60 +- gdb/testsuite/gdb.btrace/record_goto.exp | 241 +++-- gdb/testsuite/gdb.btrace/stepi.exp | 95 +- gdb/testsuite/gdb.btrace/tailcall-only.exp | 8 + gdb/testsuite/gdb.btrace/tailcall.exp | 46 +- ...on_history.S => x86-instruction_history.S} | 0 gdb/testsuite/lib/gdb.exp | 2 +- gdb/top.c | 10 +- gdbserver/ChangeLog | 16 + gdbserver/config.in | 3 + gdbserver/configure | 545 ++++++++++ gdbserver/configure.srv | 4 + gdbserver/linux-low.cc | 104 +- gdbserver/server.cc | 34 +- gdbsupport/ChangeLog | 29 + gdbsupport/Makefile.in | 3 + gdbsupport/btrace-common.cc | 46 + gdbsupport/btrace-common.h | 115 ++- gdbsupport/common.m4 | 39 + gdbsupport/config.in | 3 + gdbsupport/configure | 545 ++++++++++ 52 files changed, 7347 insertions(+), 158 deletions(-) create mode 100644 gdb/testsuite/gdb.btrace/aarch64-instruction_history.S create mode 100644 gdb/testsuite/gdb.btrace/aarch64-record_goto.S create mode 100644 gdb/testsuite/gdb.btrace/aarch64-tailcall-only.S create mode 100644 gdb/testsuite/gdb.btrace/aarch64-tailcall.S create mode 100644 gdb/testsuite/gdb.btrace/arm-instruction_history.S create mode 100644 gdb/testsuite/gdb.btrace/arm-record_goto.S create mode 100644 gdb/testsuite/gdb.btrace/arm-tailcall-only.S create mode 100644 gdb/testsuite/gdb.btrace/arm-tailcall.S rename gdb/testsuite/gdb.btrace/{instruction_history.S => x86-instruction_history.S} (100%) -- 2.25.1