From patchwork Thu May 3 15:18:22 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Leo Yan X-Patchwork-Id: 134910 Delivered-To: patch@linaro.org Received: by 10.46.151.6 with SMTP id r6csp2053445lji; Thu, 3 May 2018 08:18:47 -0700 (PDT) X-Google-Smtp-Source: AB8JxZrw+fRREsy6Kq9IRPLoxUiYIVcKs8KUVsdAQdKdAFgopJTtpIRKSOsoBo2XTiBZh9/s/1iS X-Received: by 2002:a17:902:d808:: with SMTP id a8-v6mr24482648plz.177.1525360726954; Thu, 03 May 2018 08:18:46 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1525360726; cv=none; d=google.com; s=arc-20160816; b=VeucNv778GAUONT1wRfGhrJsOKYKVStcCi9Ug+TPHHQtwTEuLo2daWx+81VDoNp0Oi 4oKj551OEbEcnB9eoSH+pqC5p4nBU8mv5t2Bc8v5wXZgRaBrnarV/Mnr8dfChE1k5c76 ODLwb7Vvuco3M7G4s0GRjdxqM1jJpKw4c5Z1tK0T509iXTVOr62J5MPzygycaaWgGsQH d6mWRdoVaTpqYRzzdhiiOx2JBGxnX9o0l02BS02vyzT2w0vupz3mgJotWzl5uxVQOdQ1 Q8vyoC2g4WG/Gvdiml25xAbLy06iMRlr26z0QSgIWqWNRryAHlsosOm5+V2YeusiAuI2 zkgw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:message-id:date:subject:cc:to:from :dkim-signature:arc-authentication-results; bh=9el/zCbBYWuz7WTle5ZIkHG1G3bV4ZvnWaPs3uJjg28=; b=R9qD11iJAvnuHq2VAttiBanrMDqP78eKvUtW0gJqjc7Cx4G4YzsDqRXfo/gqv83mPS i0Xi2+zamzmNmroqRoVM5KFPmN8kb5u0cdfQuADGweP2yBs+lemsac3nvTZtgSzsK+zW Ce01AoQ5QYKwFxnnWbnkU5tOw0Vs7URNUCWSCcx4apYzgcRAY9v2DwrWbDNaW9tVXI+2 35ehK39CsKCSOpVaY16fciZa4OrHuOQvXdJm+NYtB2tz5gjJGZyWm+SWcAIztc9gNGyd N6sdOJNrZDQOFMaziTQwO2es3eRjx7OSG+yI9+M+vSVmsBLnrLfSSI7/9T80+9V3NCaM h0Bg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=AlQrT77L; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. 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[45.79.69.94]) by smtp.gmail.com with ESMTPSA id x5-v6sm18134192pgv.15.2018.05.03.08.18.37 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 03 May 2018 08:18:41 -0700 (PDT) From: Leo Yan To: Mathieu Poirier , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Alexander Shishkin , Jiri Olsa , Namhyung Kim , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, coresight@lists.linaro.org Cc: Leo Yan Subject: [PATCH 1/2] perf cs-etm: Support unknown_thread in cs_etm_auxtrace Date: Thu, 3 May 2018 23:18:22 +0800 Message-Id: <1525360703-26159-1-git-send-email-leo.yan@linaro.org> X-Mailer: git-send-email 2.7.4 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org CoreSight doesn't allocate thread structure for unknown_thread in etm auxtrace, so unknown_thread is NULL pointer. If the perf data doesn't contain valid tid and then cs_etm__mem_access() uses unknown_thread instead as thread handler, this results in segmentation fault when thread__find_addr_map() accesses thread handler. This commit creates new thread data which is used by unknown_thread, so CoreSight tracing can roll back to use unknown_thread if perf data doesn't include valid thread info. This commit also releases thread data for initialization failure case and for normal auxtrace free flow. Signed-off-by: Leo Yan --- tools/perf/util/cs-etm.c | 25 +++++++++++++++++++++++-- 1 file changed, 23 insertions(+), 2 deletions(-) -- 2.7.4 Acked-by: Mathieu Poirier diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c index 6533b1a..417302c 100644 --- a/tools/perf/util/cs-etm.c +++ b/tools/perf/util/cs-etm.c @@ -239,6 +239,7 @@ static void cs_etm__free(struct perf_session *session) for (i = 0; i < aux->num_cpu; i++) zfree(&aux->metadata[i]); + thread__zput(aux->unknown_thread); zfree(&aux->metadata); zfree(&aux); } @@ -266,6 +267,7 @@ static u32 cs_etm__mem_access(struct cs_etm_queue *etmq, u64 address, if (!thread) { if (cpumode != PERF_RECORD_MISC_KERNEL) return -EINVAL; + thread = etmq->etm->unknown_thread; } @@ -1355,6 +1357,23 @@ int cs_etm__process_auxtrace_info(union perf_event *event, etm->auxtrace.free = cs_etm__free; session->auxtrace = &etm->auxtrace; + etm->unknown_thread = thread__new(999999999, 999999999); + if (!etm->unknown_thread) + goto err_free_queues; + + /* + * Initialize list node so that at thread__zput() we can avoid + * segmentation fault at list_del_init(). + */ + INIT_LIST_HEAD(&etm->unknown_thread->node); + + err = thread__set_comm(etm->unknown_thread, "unknown", 0); + if (err) + goto err_delete_thread; + + if (thread__init_map_groups(etm->unknown_thread, etm->machine)) + goto err_delete_thread; + if (dump_trace) { cs_etm__print_auxtrace_info(auxtrace_info->priv, num_cpu); return 0; @@ -1369,16 +1388,18 @@ int cs_etm__process_auxtrace_info(union perf_event *event, err = cs_etm__synth_events(etm, session); if (err) - goto err_free_queues; + goto err_delete_thread; err = auxtrace_queues__process_index(&etm->queues, session); if (err) - goto err_free_queues; + goto err_delete_thread; etm->data_queued = etm->queues.populated; return 0; +err_delete_thread: + thread__zput(etm->unknown_thread); err_free_queues: auxtrace_queues__free(&etm->queues); session->auxtrace = NULL; From patchwork Thu May 3 15:18:23 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Leo Yan X-Patchwork-Id: 134911 Delivered-To: patch@linaro.org Received: by 10.46.151.6 with SMTP id r6csp2053585lji; Thu, 3 May 2018 08:18:55 -0700 (PDT) X-Google-Smtp-Source: AB8JxZrPa3f0mrmKDVzBmIfJcsIv7HiIz6EYPlAzWkVwGBeJDIz5yz66nPuGtwFBZp6JPERtiiTD X-Received: by 2002:a17:902:a704:: with SMTP id w4-v6mr24123251plq.5.1525360735360; Thu, 03 May 2018 08:18:55 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1525360735; cv=none; d=google.com; s=arc-20160816; b=l49/JuGSMqdaqdQqjJfmjtIAF2gCpNTvu8xzbpWc8Pa6I3MZVNt3xs2b8Y30jYzCl+ iFE3l80DSwOSCV4Ac/zdBEpbpLfV/46xTGgYiBC2ED+zaYrX9y/1LlXxfEL8Y24PveDA F52LQr6q73JKN0ik4od5CUTGQEMneZjjqHZqlKT1X4NvzOR7LkuNgb1PZJPrcETFlWLS LKXOW0nXhO0g7uDP/aiDXm+/ttiL6U9hrUjUZjQOPUW1jYSYEbK/o1zqJjfFAeepeukY SF6Xpkds3pubQrYWbUsr+clI8JwjuKbuM+E3ePOp/A+srtzyZSka1CUEfY2n2Ym3Q7ug vR8A== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:references:in-reply-to:message-id:date :subject:cc:to:from:dkim-signature:arc-authentication-results; bh=NWXwqZkJnluzbOJWpJA842muvS5zsxdcauneelDlESc=; b=yEh/iSQZNh+T1JQfD+lIvJaOUGUMfn1X8yb9BE35MpyFBJV6jAMhsghnwZ8AOn/ZX7 GLir2/4BKNCdqvChzbJyQHdHaE3kcbSC9hBSTRZ3zqMhq9jwxhXRJxvp3uxD07yDIQWH lVqd+gCtzBsHyx0aOCLF6+O4onjAD4mEcQvEEaV8lfc7DHUMHj052Z+VjtCoeMqpCMca BFfC/mi+PWmvLpX/YtwUHMjpFeRsV6gzxsio3pk/M6zKzrW2veeROocPzSBoNPUsmNeS g0L8EdDJtMciLeO+uy8SS5cIXjazUYcSG98Avgx/YRy3hiDAw+JBsPCYcdnkmklTP52X 9mwA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=Z3rAuYfO; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. 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[45.79.69.94]) by smtp.gmail.com with ESMTPSA id x5-v6sm18134192pgv.15.2018.05.03.08.18.42 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 03 May 2018 08:18:45 -0700 (PDT) From: Leo Yan To: Mathieu Poirier , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Alexander Shishkin , Jiri Olsa , Namhyung Kim , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, coresight@lists.linaro.org Cc: Leo Yan Subject: [PATCH 2/2] perf cs-etm: Remove redundant space Date: Thu, 3 May 2018 23:18:23 +0800 Message-Id: <1525360703-26159-2-git-send-email-leo.yan@linaro.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1525360703-26159-1-git-send-email-leo.yan@linaro.org> References: <1525360703-26159-1-git-send-email-leo.yan@linaro.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org There have two spaces ahead function name cs_etm__set_pid_tid_cpu(), so remove one space and correct indentation. Signed-off-by: Leo Yan --- tools/perf/util/cs-etm.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) -- 2.7.4 Acked-by: Mathieu Poirier diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c index 417302c..3137fbe 100644 --- a/tools/perf/util/cs-etm.c +++ b/tools/perf/util/cs-etm.c @@ -612,8 +612,8 @@ cs_etm__get_trace(struct cs_etm_buffer *buff, struct cs_etm_queue *etmq) return buff->len; } -static void cs_etm__set_pid_tid_cpu(struct cs_etm_auxtrace *etm, - struct auxtrace_queue *queue) +static void cs_etm__set_pid_tid_cpu(struct cs_etm_auxtrace *etm, + struct auxtrace_queue *queue) { struct cs_etm_queue *etmq = queue->priv;