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[216.160.65.90]) by smtp.gmail.com with ESMTPSA id r7sm8698578pgu.51.2020.07.17.11.16.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 17 Jul 2020 11:16:27 -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=soz5/dc63AWvfYnTeEOXYkPjarLppwOrJCQsvAF2Sbw=; b=gtEOIcjcSir6uFvFnTXVDiyfze6bhdwMBkKx2ZxGa1H7E9PSk6uAFCNXuVNEVUm1lU a91XLoqcSnUN6/wK8SPhT1VpCiguqm8uRiEqNXpwRC1XOB2xAwy76DXUnFFBLkcGaZtK 89jzGTEsufPI4cwSp7DqtDFrAnQ3oef738QHIEaV5exRLdti1Hbp3c96WpsxJpFQdWj4 k6LvLDlDxOH2WlhWGEsQ9O+ex11Uk/xzEhXk4Hgnu8uThqvN3Ppgd3Ech4x/ax8B/pRd ER/9n9ub4asA14dCSAdIMEG+JsRlxeITYDzOyX7XdrmxM6kXR/LN2SMRIbO/0dWdd2mb fjig== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=soz5/dc63AWvfYnTeEOXYkPjarLppwOrJCQsvAF2Sbw=; b=dBw3Tjkn7ckfkEyTs/F5fPyFuLW8obPo225nmx2VH/Mdb66LDxJTGuQxEVgXGsStNQ Xjox4tPm69C1HgcxcYKkStWcsa5a7csSdnTSMNw8wN382V23dJ2L29gQahhUTzHuyB9r RKBZALdd53n4wPSTL7Zmr1p0jzosiJ4SYOnJYiu7sdGw5PjzdPivSfH4a31/gzspmod7 wPeExavkPI1rSYBlvWvslhl7f68oh5SPadQIOwk0CWbVFeA5EPnBYPwvqbmzVDHqq+/O Z5ddqY9xrptt5KuY0xl01cGym5o3hSJN1ZWDO3efHq3EST+kbhH7EfZYsAqxRJLm15Dq Pxfg== X-Gm-Message-State: AOAM533N7Ab6B/at1TgqPFFKigpRt5NARvABw+bVQVxyR1xZd3/4qUMi uBjzl/t/K/zLSIC/M5xxOIfH6kUYAks= X-Google-Smtp-Source: ABdhPJznO3+/rrrct3Yz4qitOk06c5qtaRzAHaWoHY7SiBfsLzGUdWlNzxZN2kCNKswXoK+peMSdAw== X-Received: by 2002:a17:902:be06:: with SMTP id r6mr8129071pls.143.1595009788686; Fri, 17 Jul 2020 11:16:28 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PULL for-5.1 3/3] tcg/cpu-exec: precise single-stepping after an interrupt Date: Fri, 17 Jul 2020 11:16:23 -0700 Message-Id: <20200717181623.2742758-4-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200717181623.2742758-1-richard.henderson@linaro.org> References: <20200717181623.2742758-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::633; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x633.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, Luc Michel Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) Content-Type: text/plain; charset="utf-8" When single-stepping with a debugger attached to QEMU, and when an interrupt is raised, the debugger misses the first instruction after the interrupt. Tested-by: Luc Michel Reviewed-by: Luc Michel Buglink: https://bugs.launchpad.net/qemu/+bug/757702 Message-Id: <20200717163029.2737546-1-richard.henderson@linaro.org> Signed-off-by: Richard Henderson --- accel/tcg/cpu-exec.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/accel/tcg/cpu-exec.c b/accel/tcg/cpu-exec.c index 6a3d3a3cfc..66d38f9d85 100644 --- a/accel/tcg/cpu-exec.c +++ b/accel/tcg/cpu-exec.c @@ -588,7 +588,13 @@ static inline bool cpu_handle_interrupt(CPUState *cpu, else { if (cc->cpu_exec_interrupt(cpu, interrupt_request)) { replay_interrupt(); - cpu->exception_index =3D -1; + /* + * After processing the interrupt, ensure an EXCP_DEBUG is + * raised when single-stepping so that GDB doesn't miss the + * next instruction. + */ + cpu->exception_index =3D + (cpu->singlestep_enabled ? EXCP_DEBUG : -1); *last_tb =3D NULL; } /* The target hook may have updated the 'cpu->interrupt_reques= t'; --=20 2.25.1