From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:46431) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dU6zL-0004RH-7s for qemu-devel@nongnu.org; Sun, 09 Jul 2017 03:50:45 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dU6zF-00031h-CE for qemu-devel@nongnu.org; Sun, 09 Jul 2017 03:50:43 -0400 Received: from out3-smtp.messagingengine.com ([66.111.4.27]:53043) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dU6zE-000301-Q3 for qemu-devel@nongnu.org; Sun, 09 Jul 2017 03:50:36 -0400 From: "Emilio G. Cota" Date: Sun, 9 Jul 2017 03:50:11 -0400 Message-Id: <1499586614-20507-20-git-send-email-cota@braap.org> In-Reply-To: <1499586614-20507-1-git-send-email-cota@braap.org> References: <1499586614-20507-1-git-send-email-cota@braap.org> Subject: [Qemu-devel] [PATCH 19/22] tcg: introduce tcg_context_clone List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Richard Henderson Before we make TCGContext thread-local. Signed-off-by: Emilio G. Cota --- tcg/tcg.h | 1 + tcg/tcg.c | 14 ++++++++++++++ 2 files changed, 15 insertions(+) diff --git a/tcg/tcg.h b/tcg/tcg.h index 2a64ee2..be5f3fd 100644 --- a/tcg/tcg.h +++ b/tcg/tcg.h @@ -778,6 +778,7 @@ static inline void *tcg_malloc(int size) } void tcg_context_init(TCGContext *s); +void tcg_context_clone(TCGContext *s); void tcg_prologue_init(TCGContext *s); void tcg_register_thread(void); void tcg_func_start(TCGContext *s); diff --git a/tcg/tcg.c b/tcg/tcg.c index 2f003a0..8febf53 100644 --- a/tcg/tcg.c +++ b/tcg/tcg.c @@ -117,6 +117,7 @@ static bool tcg_out_tb_finalize(TCGContext *s); #define TCG_HIGHWATER 1024 +static const TCGContext *tcg_init_ctx; static QemuMutex tcg_lock; /* @@ -353,6 +354,7 @@ void tcg_context_init(TCGContext *s) TCGArgConstraint *args_ct; int *sorted_args; + tcg_init_ctx = s; memset(s, 0, sizeof(*s)); s->nb_globals = 0; @@ -409,6 +411,18 @@ void tcg_context_init(TCGContext *s) } /* + * Clone the initial TCGContext. Used by TCG threads to copy the TCGContext + * set up by their parent thread via tcg_context_init(). + */ +void tcg_context_clone(TCGContext *s) +{ + if (unlikely(tcg_init_ctx == NULL || tcg_init_ctx == s)) { + tcg_abort(); + } + memcpy(s, tcg_init_ctx, sizeof(*s)); +} + +/* * Allocate TBs right before their corresponding translated code, making * sure that TBs and code are on different cache lines. */ -- 2.7.4