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Re: [PATCH] util/log: flush TB cache when log level changes

From: Pavel Dovgalyuk
Subject: Re: [PATCH] util/log: flush TB cache when log level changes
Date: Fri, 22 Jan 2021 13:47:21 +0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0

On 22.01.2021 13:32, Philippe Mathieu-Daudé wrote:
Hi Pavel,

On 1/22/21 11:03 AM, Pavel Dovgalyuk wrote:
Sometimes we need to collect the translation logs starting
from some point of the execution. Some TB listings may
be missed in this case, when blocks were translated before.
This patch clears TB cache to allow re-translation of such
code blocks.

Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgalyuk@ispras.ru>
  accel/tcg/translate-all.c |    8 ++++++++
  include/sysemu/tcg.h      |    1 +
  stubs/meson.build         |    1 +
  stubs/tcg.c               |   12 ++++++++++++
  util/log.c                |    3 +++
  5 files changed, 25 insertions(+)
  create mode 100644 stubs/tcg.c

   * Formerly ifdef DEBUG_TB_CHECK. These debug functions are user-mode-only,
   * so in order to prevent bit rot we compile them unconditionally in 
diff --git a/include/sysemu/tcg.h b/include/sysemu/tcg.h
index 00349fb18a..7415f11022 100644
--- a/include/sysemu/tcg.h
+++ b/include/sysemu/tcg.h
@@ -9,6 +9,7 @@
  #define SYSEMU_TCG_H
void tcg_exec_init(unsigned long tb_size, int splitwx);
+void tb_flush_all(void);

Why not declare in "exec/exec-all.h"?

It includes cpu.h, which is not available for all tools, that use logs.

Pavel Dovgalyuk

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