From patchwork Tue Mar 21 15:46:17 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Willgerodt, Felix" X-Patchwork-Id: 66693 Return-Path: X-Original-To: patchwork@sourceware.org Delivered-To: patchwork@sourceware.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 2120C385086D for ; Tue, 21 Mar 2023 15:47:06 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 2120C385086D DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1679413626; bh=h8hGqGBkCMNRR5hyuZnyuaoeJyI7567kTG+nGRWXzrg=; h=To:Cc:Subject:Date:In-Reply-To:References:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From:Reply-To:From; b=tnfxq6ikFPRvpEVYjRcvWykyCYcoRXwqspskuzoxWD3RSkyqG5K/74rHKEAB/8g2+ PDXbC5o19JAioHOaRFrJN6LlY/x79QqEO15Kt1fcj6UXzWwFSUYIxQZ24JJvY4vfgU pPM9jWuqJxD5rbXXGTrRJeLnTqdEhyh8CpJmovj0= X-Original-To: gdb-patches@sourceware.org Delivered-To: gdb-patches@sourceware.org Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by sourceware.org (Postfix) with ESMTPS id C27FE3858004 for ; Tue, 21 Mar 2023 15:46:40 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org C27FE3858004 X-IronPort-AV: E=McAfee;i="6600,9927,10656"; a="366709315" X-IronPort-AV: E=Sophos;i="5.98,279,1673942400"; d="scan'208";a="366709315" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Mar 2023 08:46:40 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10656"; a="792149344" X-IronPort-AV: E=Sophos;i="5.98,279,1673942400"; d="scan'208";a="792149344" Received: from mulfelix.iul.intel.com (HELO localhost) ([172.28.49.163]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Mar 2023 08:46:39 -0700 To: gdb-patches@sourceware.org Cc: Felix Willgerodt Subject: [PATCH v8 01/10] btrace: Introduce auxiliary instructions. Date: Tue, 21 Mar 2023 16:46:17 +0100 Message-Id: <20230321154626.448816-2-felix.willgerodt@intel.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230321154626.448816-1-felix.willgerodt@intel.com> References: <20230321154626.448816-1-felix.willgerodt@intel.com> MIME-Version: 1.0 X-Spam-Status: No, score=-10.2 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_NONE, TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) 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-Patchwork-Original-From: Felix Willgerodt via Gdb-patches From: "Willgerodt, Felix" Reply-To: Felix Willgerodt Errors-To: gdb-patches-bounces+patchwork=sourceware.org@sourceware.org Sender: "Gdb-patches" Auxiliary instructions are pseudo instructions pointing to auxiliary data. This auxiliary data can be printed in all commands displaying (record function-call-history, record instruction-history) or stepping through (stepi etc.) the execution history, which will be introduced in the next commits. This patch is in preparation for the new ptwrite feature, which is based on auxiliary instructions. --- gdb/btrace.c | 2 ++ gdb/btrace.h | 24 +++++++++++++++++++++--- gdb/doc/gdb.texinfo | 3 +++ 3 files changed, 26 insertions(+), 3 deletions(-) diff --git a/gdb/btrace.c b/gdb/btrace.c index 38d3882c154..b0afc1735f8 100644 --- a/gdb/btrace.c +++ b/gdb/btrace.c @@ -1823,6 +1823,8 @@ btrace_clear_history (struct btrace_thread_info *btinfo) btinfo->insn_history = NULL; btinfo->call_history = NULL; btinfo->replay = NULL; + + btinfo->aux_data.clear (); } /* Clear the branch trace maintenance histories in BTINFO. */ diff --git a/gdb/btrace.h b/gdb/btrace.h index 0ec84113217..dd80d3e6806 100644 --- a/gdb/btrace.h +++ b/gdb/btrace.h @@ -52,7 +52,10 @@ enum btrace_insn_class BTRACE_INSN_RETURN, /* The instruction is an unconditional jump. */ - BTRACE_INSN_JUMP + BTRACE_INSN_JUMP, + + /* The instruction is a pseudo instruction containing auxiliary data. */ + BTRACE_INSN_AUX }; /* Instruction flags. */ @@ -68,8 +71,19 @@ DEF_ENUM_FLAGS_TYPE (enum btrace_insn_flag, btrace_insn_flags); This represents a single instruction in a branch trace. */ struct btrace_insn { - /* The address of this instruction. */ - CORE_ADDR pc; + union + { + /* The address of this instruction. Applies to btrace_insn with + iclass == BTRACE_INSN_OTHER or + iclass == BTRACE_INSN_CALL or + iclass == BTRACE_INSN_RETURN or + iclass == BTRACE_INSN_JUMP. */ + CORE_ADDR pc; + + /* Index into btrace_info::aux_data. Applies to btrace_insn with + iclass == BTRACE_INSN_AUX. */ + uint64_t aux_data_index; + }; /* The size of this instruction in bytes. */ gdb_byte size; @@ -330,6 +344,10 @@ struct btrace_thread_info function segment i will be at index (i - 1). */ std::vector functions; + /* Optional auxiliary information that is printed in all commands + displaying or stepping through the execution history. */ + std::vector aux_data; + /* The function level offset. When added to each function's LEVEL, this normalizes the function levels such that the smallest level becomes zero. */ diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo index 6c811b8be2e..d1690c07a99 100644 --- a/gdb/doc/gdb.texinfo +++ b/gdb/doc/gdb.texinfo @@ -7639,6 +7639,9 @@ Moxie, PowerPC, PowerPC64, S/390, and x86 (i386/amd64) running GNU/Linux. Process record and replay can be used both when native debugging, and when remote debugging via @code{gdbserver}. +When recording an inferior, @value{GDBN} may print auxiliary information +during stepping commands and commands displaying the execution history. + For architecture environments that support process record and replay, @value{GDBN} provides the following commands: