From: Paolo Bonzini <pbonzini@redhat.com>
To: Robert Foley <robert.foley@linaro.org>, qemu-devel@nongnu.org
Cc: peter.puhov@linaro.org,
Richard Henderson <richard.henderson@linaro.org>,
cota@braap.org, alex.bennee@linaro.org
Subject: Re: [PATCH 13/19] accel/tcg: Fixed tsan warnings.
Date: Tue, 26 May 2020 20:47:46 +0200 [thread overview]
Message-ID: <20a437ff-034c-ccc8-24d8-af25f962a445@redhat.com> (raw)
In-Reply-To: <20200522160755.886-14-robert.foley@linaro.org>
On 22/05/20 18:07, Robert Foley wrote:
> For example:
> WARNING: ThreadSanitizer: data race (pid=35425)
> Write of size 4 at 0x7bbc000000ac by main thread (mutexes: write M875):
> #0 cpu_reset_interrupt hw/core/cpu.c:107:28 (qemu-system-aarch64+0x843790)
> #1 arm_cpu_set_irq target/arm/cpu.c (qemu-system-aarch64+0x616265)
> #2 qemu_set_irq hw/core/irq.c:44:5 (qemu-system-aarch64+0x8462ca)
> Previous atomic read of size 4 at 0x7bbc000000ac by thread T6:
> #0 __tsan_atomic32_load <null> (qemu-system-aarch64+0x394c1c)
> #1 cpu_handle_interrupt accel/tcg/cpu-exec.c:534:9 (qemu-system-aarch64+0x4b7e79)
> #2 cpu_exec accel/tcg/cpu-exec.c:720:17 (qemu-system-aarch64+0x4b7e79)
> or
> WARNING: ThreadSanitizer: data race (pid=25425)
> Read of size 8 at 0x7f8ad8e138d0 by thread T10:
> #0 tb_lookup_cmp accel/tcg/cpu-exec.c:307:13 (qemu-system-aarch64+0x4ac4d2)
> #1 qht_do_lookup util/qht.c:502:34 (qemu-system-aarch64+0xd05264)
> Previous write of size 8 at 0x7f8ad8e138d0 by thread T15 (mutexes: write M728311726235541804):
> #0 tb_link_page accel/tcg/translate-all.c:1625:26 (qemu-system-aarch64+0x4b0bf2)
> #1 tb_gen_code accel/tcg/translate-all.c:1865:19 (qemu-system-aarch64+0x4b0bf2)
> #2 tb_find accel/tcg/cpu-exec.c:407:14 (qemu-system-aarch64+0x4ad77c)
>
> Cc: Richard Henderson <richard.henderson@linaro.org>
> Cc: Paolo Bonzini <pbonzini@redhat.com>
> Signed-off-by: Robert Foley <robert.foley@linaro.org>
> ---
> accel/tcg/tcg-all.c | 4 ++--
> accel/tcg/tcg-runtime.c | 7 ++++++-
> accel/tcg/translate-all.c | 6 +++++-
> hw/core/cpu.c | 2 +-
> 4 files changed, 14 insertions(+), 5 deletions(-)
>
> diff --git a/accel/tcg/tcg-all.c b/accel/tcg/tcg-all.c
> index 3b4fda5640..f94ea4c4b3 100644
> --- a/accel/tcg/tcg-all.c
> +++ b/accel/tcg/tcg-all.c
> @@ -54,8 +54,8 @@ static void tcg_handle_interrupt(CPUState *cpu, int mask)
> int old_mask;
> g_assert(qemu_mutex_iothread_locked());
>
> - old_mask = cpu->interrupt_request;
> - cpu->interrupt_request |= mask;
> + old_mask = atomic_read(&cpu->interrupt_request);
> + atomic_or(&cpu->interrupt_request, mask);
You can use atomic_fetch_or here.
Paolo
next prev parent reply other threads:[~2020-05-26 18:49 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-22 16:07 [PATCH 00/19] Add Thread Sanitizer support to QEMU Robert Foley
2020-05-22 16:07 ` [PATCH 01/19] configure: add --enable-tsan flag + fiber annotations for coroutine-ucontext Robert Foley
2020-05-23 16:55 ` Philippe Mathieu-Daudé
2020-05-26 12:38 ` Robert Foley
2020-06-17 14:24 ` Stefan Hajnoczi
2020-06-17 15:56 ` Alex Bennée
2020-06-17 21:27 ` Robert Foley
2020-05-22 16:07 ` [PATCH 02/19] cpu: convert queued work to a QSIMPLEQ Robert Foley
2020-05-24 10:20 ` Philippe Mathieu-Daudé
2020-05-26 15:01 ` Robert Foley
2020-05-22 16:07 ` [PATCH 03/19] thread: add qemu_spin_destroy Robert Foley
2020-05-22 16:07 ` [PATCH 04/19] cputlb: destroy CPUTLB with tlb_destroy Robert Foley
2020-05-22 16:07 ` [PATCH 05/19] qht: call qemu_spin_destroy for head buckets Robert Foley
2020-05-22 16:07 ` [PATCH 06/19] tcg: call qemu_spin_destroy for tb->jmp_lock Robert Foley
2020-05-22 16:07 ` [PATCH 07/19] translate-all: call qemu_spin_destroy for PageDesc Robert Foley
2020-05-22 16:07 ` [PATCH 08/19] thread: add tsan annotations to QemuSpin Robert Foley
2020-05-22 16:07 ` [PATCH 09/19] tests/docker: Added docker build support for TSan Robert Foley
2020-05-22 16:07 ` [PATCH 10/19] include/qemu: Added tsan.h for annotations Robert Foley
2020-05-23 17:20 ` Emilio G. Cota
2020-05-23 21:37 ` Emilio G. Cota
2020-05-22 16:07 ` [PATCH 11/19] accel/tcg: Fixed tsan warnings related to parallel_cpus Robert Foley
2020-05-23 17:21 ` Emilio G. Cota
2020-05-22 16:07 ` [PATCH 12/19] configure: added tsan support for blacklist Robert Foley
2020-05-23 17:27 ` Emilio G. Cota
2020-05-26 14:07 ` Robert Foley
2020-05-22 16:07 ` [PATCH 13/19] accel/tcg: Fixed tsan warnings Robert Foley
2020-05-23 20:06 ` Emilio G. Cota
2020-05-26 15:14 ` Robert Foley
2020-05-26 18:47 ` Paolo Bonzini [this message]
2020-05-22 16:07 ` [PATCH 14/19] util/async: " Robert Foley
2020-05-23 20:12 ` Emilio G. Cota
2020-05-26 15:19 ` Robert Foley
2020-05-26 10:32 ` Stefan Hajnoczi
2020-05-26 15:21 ` Robert Foley
2020-05-22 16:07 ` [PATCH 15/19] qht: Fix " Robert Foley
2020-05-23 20:44 ` Emilio G. Cota
2020-05-22 16:07 ` [PATCH 16/19] util: fixed tsan warnings in thread_pool.c Robert Foley
2020-05-26 20:18 ` Paolo Bonzini
2020-05-22 16:07 ` [PATCH 17/19] util: Added tsan annotate for thread name Robert Foley
2020-05-23 20:29 ` Emilio G. Cota
2020-05-22 16:07 ` [PATCH 18/19] target/arm: Fix tsan warning in cpu.c Robert Foley
2020-05-22 17:44 ` Peter Maydell
2020-05-22 21:33 ` Robert Foley
2020-05-22 22:36 ` Peter Maydell
2020-05-23 17:18 ` Emilio G. Cota
2020-05-26 14:01 ` Robert Foley
2020-05-22 16:07 ` [PATCH 19/19] docs: Added details on TSan to testing.rst Robert Foley
2020-05-23 20:29 ` Emilio G. Cota
2020-05-22 21:07 ` [PATCH 00/19] Add Thread Sanitizer support to QEMU no-reply
2020-05-23 21:36 ` Emilio G. Cota
2020-05-26 15:18 ` Robert Foley
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