From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 65779 invoked by alias); 9 Jun 2016 12:56:49 -0000 Mailing-List: contact gdb-patches-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-patches-owner@sourceware.org Received: (qmail 65724 invoked by uid 89); 9 Jun 2016 12:56:48 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-0.9 required=5.0 tests=BAYES_00,KAM_LAZY_DOMAIN_SECURITY autolearn=no version=3.3.2 spammy=Share, 1550, sk:linux-a, sk:linuxa X-HELO: usplmg21.ericsson.net Received: from usplmg21.ericsson.net (HELO usplmg21.ericsson.net) (198.24.6.65) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with (AES256-SHA encrypted) ESMTPS; Thu, 09 Jun 2016 12:56:30 +0000 Received: from EUSAAHC001.ericsson.se (Unknown_Domain [147.117.188.75]) by usplmg21.ericsson.net (Symantec Mail Security) with SMTP id C8.8C.03614.24769575; Thu, 9 Jun 2016 14:55:31 +0200 (CEST) Received: from elxa4wqvvz1.dyn.mo.ca.am.ericsson.se (147.117.188.8) by smtps-am.internal.ericsson.com (147.117.188.75) with Microsoft SMTP Server (TLS) id 14.3.294.0; Thu, 9 Jun 2016 08:56:26 -0400 From: Antoine Tremblay To: CC: Antoine Tremblay Subject: [PATCH v2 00/17] Fast tracepoint support for ARMv7 Date: Thu, 09 Jun 2016 12:56:00 -0000 Message-ID: <1465476975-25062-1-git-send-email-antoine.tremblay@ericsson.com> MIME-Version: 1.0 Content-Type: text/plain X-IsSubscribed: yes X-SW-Source: 2016-06/txt/msg00169.txt.bz2 Hi, This is a v2 of: https://sourceware.org/ml/gdb-patches/2015-10/msg00195.html It needs to be applied on top of tracepoints support for ARM see: https://sourceware.org/ml/gdb-patches/2016-01/msg00111.html This patch enables fast tracepoints for ARM on Linux. It has been reworked by Simon Marchi and Antoine Tremblay and the following features have been added: * Relocation of many PC relative instructions. * JIT compilation of the condition expression. There are some limitations: * The tracepoint insertion will fail if the distance from the instruction to the jump pad is big. * It is only possible to place fast tracepoints on 4-byte instructions, which also limits the valid locations in Thumb mode. Known Issues: There is a possible issue while stepping out of the jump pad as discussed here: https://sourceware.org/ml/gdb-patches/2016-01/msg00673.html But this issue is present in x86 with hardware single stepping too. So I don't think it's related to this series and can be addressed separately. I'm still mentioning it as it may be relevant while testing software single stepping out of the jump pad. Patches: Patches 1-9: Share instruction decoding code between GDB and GDBServer so that it can be used for instruction relocation in GDBServer. Patch 10: Refactors install_fast_tracepoint_jump_pad to pass a pointer to the tracepoint, instead of separate arguments. Patch 11: Enables software single stepping out of the jump pad. Patch 12: Adds all the functions needed to assemble ARM instructions needed in the jump pad and in the JIT condition evaluation. Patch 13: Adds fast tracepoint support, without JIT condition evaluation and PC-relative instructions support. Patch 14: Adds JIT condition evaluation support. Patch 15-17: Adds PC-relative instruction relocation support. Tested on ARMv7 linux {unix, native-gdbserver, native-extended-gdbserver} no regression observed. Antoine Tremblay (4): Use software single step to step out of a fast tracepoint jump pad Add ARM/Thumb instruction assembler for fast tracepoints Fast tracepoint support for ARM on Linux JIT conditions support for ARM tracepoints. Simon Marchi (13): arm-tdep.c: Replace arguments to decode function by a structure arm-tdep.c: Refactor displaced stepping relocation functions arm-tdep.c: Move debug printout from decode to copy function arm-tdep.c: Use relocation visitor in ARM instruction decoding arm-tdep.c: Use relocation visitor in Thumb 32-bits instruction decoding arm-tdep.c: Use relocation visitor in Thumb 16-bits instruction decoding Move ARM instruction decode functions to arch/arm-insn-reloc.c Move Thumb 32 bits instruction decode functions to arch/arm-insn-reloc.c Move Thumb 16 bits instruction decode functions to arch/arm-insn-reloc.c gdbserver: pass pointer to struct tracepoint to install_fast_tracepoint_jump_pad arm: Move insn_references_pc to common code arm fast tracepoints: Relocation of ARM instructions arm fast tracepoints: Relocation of Thumb 32-bits instructions gdb/Makefile.in | 29 +- gdb/NEWS | 4 + gdb/aarch64-tdep.c | 3 +- gdb/arch/aarch64-insn.c | 3 +- gdb/arch/aarch64-insn.h | 32 +- gdb/arch/arm-insn-emit.c | 1550 +++++++++++++++++++++ gdb/arch/arm-insn-emit.h | 1087 +++++++++++++++ gdb/arch/arm-insn-reloc.c | 881 ++++++++++++ gdb/arch/arm-insn-reloc.h | 109 ++ gdb/arch/arm-insn-utils.c | 44 + gdb/arch/arm-insn-utils.h | 80 ++ gdb/arch/arm.h | 2 + gdb/arm-tdep.c | 1464 +++++--------------- gdb/configure.tgt | 7 +- gdb/gdbserver/Makefile.in | 29 +- gdb/gdbserver/configure.srv | 8 + gdb/gdbserver/linux-aarch32-low.c | 8 - gdb/gdbserver/linux-aarch32-low.h | 8 + gdb/gdbserver/linux-aarch64-low.c | 80 +- gdb/gdbserver/linux-arm-ipa.c | 228 ++++ gdb/gdbserver/linux-arm-low.c | 1960 ++++++++++++++++++++++++++- gdb/gdbserver/linux-low.c | 21 +- gdb/gdbserver/linux-low.h | 5 +- gdb/gdbserver/linux-x86-low.c | 63 +- gdb/gdbserver/target.h | 26 +- gdb/gdbserver/tracepoint.c | 138 +- gdb/gdbserver/tracepoint.h | 126 ++ gdb/testsuite/gdb.trace/ftrace-arm-insn.S | 378 ++++++ gdb/testsuite/gdb.trace/ftrace-arm-insn.c | 94 ++ gdb/testsuite/gdb.trace/ftrace-arm-insn.exp | 111 ++ gdb/testsuite/lib/trace-support.exp | 3 +- 31 files changed, 7130 insertions(+), 1451 deletions(-) create mode 100644 gdb/arch/arm-insn-emit.c create mode 100644 gdb/arch/arm-insn-emit.h create mode 100644 gdb/arch/arm-insn-reloc.c create mode 100644 gdb/arch/arm-insn-reloc.h create mode 100644 gdb/arch/arm-insn-utils.c create mode 100644 gdb/arch/arm-insn-utils.h create mode 100644 gdb/gdbserver/linux-arm-ipa.c create mode 100644 gdb/testsuite/gdb.trace/ftrace-arm-insn.S create mode 100644 gdb/testsuite/gdb.trace/ftrace-arm-insn.c create mode 100644 gdb/testsuite/gdb.trace/ftrace-arm-insn.exp -- 2.8.1