From patchwork Tue Mar 15 14:30:19 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Alex_Benn=C3=A9e?= X-Patchwork-Id: 63875 Delivered-To: patch@linaro.org Received: by 10.112.199.169 with SMTP id jl9csp703830lbc; Tue, 15 Mar 2016 07:34:07 -0700 (PDT) X-Received: by 10.140.173.193 with SMTP id t184mr40896421qht.23.1458052447070; Tue, 15 Mar 2016 07:34:07 -0700 (PDT) Return-Path: Received: from lists.gnu.org (lists.gnu.org. [2001:4830:134:3::11]) by mx.google.com with ESMTPS id b46si26675410qge.55.2016.03.15.07.34.06 for (version=TLS1 cipher=AES128-SHA bits=128/128); Tue, 15 Mar 2016 07:34:07 -0700 (PDT) Received-SPF: pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 2001:4830:134:3::11 as permitted sender) client-ip=2001:4830:134:3::11; Authentication-Results: mx.google.com; spf=pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 2001:4830:134:3::11 as permitted sender) smtp.mailfrom=qemu-devel-bounces+patch=linaro.org@nongnu.org; dkim=fail header.i=@linaro.org Received: from localhost ([::1]:48609 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1afq2w-0006C9-Fq for patch@linaro.org; Tue, 15 Mar 2016 10:34:06 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48331) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1afpzd-000158-Ug for qemu-devel@nongnu.org; Tue, 15 Mar 2016 10:30:45 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1afpzX-0005LH-SH for qemu-devel@nongnu.org; Tue, 15 Mar 2016 10:30:41 -0400 Received: from mail-wm0-x229.google.com ([2a00:1450:400c:c09::229]:37599) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1afpzX-0005L3-HZ for qemu-devel@nongnu.org; Tue, 15 Mar 2016 10:30:35 -0400 Received: by mail-wm0-x229.google.com with SMTP id p65so29408111wmp.0 for ; Tue, 15 Mar 2016 07:30:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=F9lRGuH4tXhqZBbs+6ozZxpPws5oY7jrL9d9ZNMQbMU=; b=PjdNyNk/O88M7TO5XpwY/Ul+MVq7ZAOc4fos8l5uB+mhELV/Hdxra4hmNRO+X5oPM0 O8qmttfHG04MwRlq96ldoBvbusPqXusx1qIwRIprUrgAL7VLSxleZ4KSv0KUZ88zu+eU uYJyzp7ygfGiVq6qS1pez+QH1Sia13kgCm7Xg= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=F9lRGuH4tXhqZBbs+6ozZxpPws5oY7jrL9d9ZNMQbMU=; b=cOjJg4AK1F/d86AVhU3quSRxNaNgFIg4IMSfhjMIJyg8LD6OnSns68cdXmzp5NX4Pu x1K7h80/PLlRN8rjN/5mwtmK6zaQRz4Eib2g2puIqZnVC2lEod9Dgny7pmdjh7Pii9sO uWa82goyggeLBwQ3lAi1GXAxIBAIq/4p2sZPUK21KQlZX+jMPuOphD2y/TcSQ0H99++r fZ1Q0Uk1DXQqtRGSmB9Hk2p2wL2NKX9xL0JrweThVr1LDs60kcAI4PQJaXswc9sgJosc 7o1Inzltv0qcfJbBeMZYl8CGxqfeiKwriuVcsnxlzxRQaTofCvMHntseWHJzw9RjJ17r bsfA== X-Gm-Message-State: AD7BkJLBbTZfSFIPyY+8HaX/rmLcES35snGMP365rhlKVSgA4ctuT6DaV6HnnS/eBFYOb+Ft X-Received: by 10.194.77.193 with SMTP id u1mr30375548wjw.73.1458052234913; Tue, 15 Mar 2016 07:30:34 -0700 (PDT) Received: from zen.linaro.local ([81.128.185.34]) by smtp.gmail.com with ESMTPSA id jf6sm27429023wjb.2.2016.03.15.07.30.29 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 15 Mar 2016 07:30:31 -0700 (PDT) Received: from zen.linaroharston (localhost [127.0.0.1]) by zen.linaro.local (Postfix) with ESMTP id B8C2A3E048F; Tue, 15 Mar 2016 14:30:27 +0000 (GMT) From: =?UTF-8?q?Alex=20Benn=C3=A9e?= To: qemu-devel@nongnu.org Date: Tue, 15 Mar 2016 14:30:19 +0000 Message-Id: <1458052224-9316-6-git-send-email-alex.bennee@linaro.org> X-Mailer: git-send-email 2.7.2 In-Reply-To: <1458052224-9316-1-git-send-email-alex.bennee@linaro.org> References: <1458052224-9316-1-git-send-email-alex.bennee@linaro.org> MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2a00:1450:400c:c09::229 Cc: Peter Maydell , Peter Crosthwaite , crosthwaitepeter@gmail.com, pbonzini@redhat.com, =?UTF-8?q?Alex=20Benn=C3=A9e?= , aurelien@aurel32.net, rth@twiddle.net Subject: [Qemu-devel] [PATCH v9 4/9] qemu-log: Improve the "exec" TB execution logging X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org From: Peter Maydell Improve the TB execution logging so that it is easier to identify what is happening from trace logs: * move the "Trace" logging of executed TBs into cpu_tb_exec() so that it is emitted if and only if we actually execute a TB, and for consistency for the CPU state logging * log when we link two TBs together via tb_add_jump() * log when cpu_tb_exec() returns early from a chain of TBs The new style logging looks like this: Trace 0x7fb7cc822ca0 [ffffffc0000dce00] Linking TBs 0x7fb7cc822ca0 [ffffffc0000dce00] index 0 -> 0x7fb7cc823110 [ffffffc0000dce10] Trace 0x7fb7cc823110 [ffffffc0000dce10] Trace 0x7fb7cc823420 [ffffffc000302688] Trace 0x7fb7cc8234a0 [ffffffc000302698] Trace 0x7fb7cc823520 [ffffffc0003026a4] Trace 0x7fb7cc823560 [ffffffc0000dce44] Linking TBs 0x7fb7cc823560 [ffffffc0000dce44] index 1 -> 0x7fb7cc8235d0 [ffffffc0000dce70] Trace 0x7fb7cc8235d0 [ffffffc0000dce70] Stopped execution of TB chain before 0x7fb7cc8235d0 [ffffffc0000dce70] Trace 0x7fb7cc8235d0 [ffffffc0000dce70] Trace 0x7fb7cc822fd0 [ffffffc0000dd52c] Signed-off-by: Peter Maydell Signed-off-by: Alex Bennée [AJB: reword patch title, Abandoned->Stopped] Reviewed-by: Aurelien Jarno Reviewed-by: Richard Henderson --- v6 - Abandoned -> Stopped - Added r-b tag --- cpu-exec.c | 20 +++++++++++--------- include/exec/exec-all.h | 3 +++ 2 files changed, 14 insertions(+), 9 deletions(-) -- 2.7.2 diff --git a/cpu-exec.c b/cpu-exec.c index fd92452..6206cdf 100644 --- a/cpu-exec.c +++ b/cpu-exec.c @@ -133,10 +133,14 @@ static void init_delay_params(SyncClocks *sc, const CPUState *cpu) #endif /* CONFIG USER ONLY */ /* Execute a TB, and fix up the CPU state afterwards if necessary */ -static inline tcg_target_ulong cpu_tb_exec(CPUState *cpu, uint8_t *tb_ptr) +static inline tcg_target_ulong cpu_tb_exec(CPUState *cpu, TranslationBlock *itb) { CPUArchState *env = cpu->env_ptr; uintptr_t next_tb; + uint8_t *tb_ptr = itb->tc_ptr; + + qemu_log_mask(CPU_LOG_EXEC, "Trace %p [" TARGET_FMT_lx "] %s\n", + itb->tc_ptr, itb->pc, lookup_symbol(itb->pc)); #if defined(DEBUG_DISAS) if (qemu_loglevel_mask(CPU_LOG_TB_CPU)) { @@ -167,6 +171,10 @@ static inline tcg_target_ulong cpu_tb_exec(CPUState *cpu, uint8_t *tb_ptr) */ CPUClass *cc = CPU_GET_CLASS(cpu); TranslationBlock *tb = (TranslationBlock *)(next_tb & ~TB_EXIT_MASK); + qemu_log_mask(CPU_LOG_EXEC, + "Stopped execution of TB chain before %p [" + TARGET_FMT_lx "] %s\n", + itb->tc_ptr, itb->pc, lookup_symbol(itb->pc)); if (cc->synchronize_from_tb) { cc->synchronize_from_tb(cpu, tb); } else { @@ -202,7 +210,7 @@ static void cpu_exec_nocache(CPUState *cpu, int max_cycles, cpu->current_tb = tb; /* execute the generated code */ trace_exec_tb_nocache(tb, tb->pc); - cpu_tb_exec(cpu, tb->tc_ptr); + cpu_tb_exec(cpu, tb); cpu->current_tb = NULL; tb_phys_invalidate(tb, -1); tb_free(tb); @@ -344,7 +352,6 @@ int cpu_exec(CPUState *cpu) #endif int ret, interrupt_request; TranslationBlock *tb; - uint8_t *tc_ptr; uintptr_t next_tb; SyncClocks sc; @@ -500,10 +507,6 @@ int cpu_exec(CPUState *cpu) next_tb = 0; tcg_ctx.tb_ctx.tb_invalidated_flag = 0; } - if (qemu_loglevel_mask(CPU_LOG_EXEC)) { - qemu_log("Trace %p [" TARGET_FMT_lx "] %s\n", - tb->tc_ptr, tb->pc, lookup_symbol(tb->pc)); - } /* see if we can patch the calling TB. When the TB spans two pages, we cannot safely do a direct jump. */ @@ -515,10 +518,9 @@ int cpu_exec(CPUState *cpu) tb_unlock(); if (likely(!cpu->exit_request)) { trace_exec_tb(tb, tb->pc); - tc_ptr = tb->tc_ptr; /* execute the generated code */ cpu->current_tb = tb; - next_tb = cpu_tb_exec(cpu, tc_ptr); + next_tb = cpu_tb_exec(cpu, tb); cpu->current_tb = NULL; switch (next_tb & TB_EXIT_MASK) { case TB_EXIT_REQUESTED: diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h index 05a151d..1823ee3 100644 --- a/include/exec/exec-all.h +++ b/include/exec/exec-all.h @@ -379,6 +379,9 @@ static inline void tb_add_jump(TranslationBlock *tb, int n, { /* NOTE: this test is only needed for thread safety */ if (!tb->jmp_next[n]) { + qemu_log_mask(CPU_LOG_EXEC, "Linking TBs %p [" TARGET_FMT_lx + "] index %d -> %p [" TARGET_FMT_lx "]\n", + tb->tc_ptr, tb->pc, n, tb_next->tc_ptr, tb_next->pc); /* patch the native jump address */ tb_set_jmp_target(tb, n, (uintptr_t)tb_next->tc_ptr);