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[PATCH v2 0/6] Make the qemu_logfile handle thread safe.
From: |
Robert Foley |
Subject: |
[PATCH v2 0/6] Make the qemu_logfile handle thread safe. |
Date: |
Fri, 15 Nov 2019 08:10:34 -0500 |
This patch adds thread safety to the qemu_logfile handle. This now
allows changing the logfile while logging is active, and also solves
the issue of a seg fault while changing the logfile.
This patch adds use of RCU for handling the swap out of the
old qemu_logfile file descriptor.
Also added a few tests for logfile including changing the logfile
and closing the logfile.
One change also added for a pre-existing double free issue in
qemu_set_log_filename() uncovered with the new test.
We also cleaned up the flow of code in qemu_set_log().
---
v2
- This version of the patch adds some cleanup of code in
qemu_set_log().
- Also changed the order of patches to move our fix for the
double free issue in qemu_set_log_filename() up to the beginning
of the patch.
---
v1
- This version of the patch incorporates changes
from the first round of review.
- It also includes a fix for an issue in
qemu_set_log_filename(). This issue was uncovered
by the test added for this patch.
---
Robert Foley (6):
Fix double free issue in qemu_set_log_filename().
Cleaned up flow of code in qemu_set_log(), to simplify and clarify.
Add a mutex to guarantee single writer to qemu_logfile handle.
qemu_log_lock/unlock now preserves the qemu_logfile handle.
Add use of RCU for qemu_logfile.
Added tests for close and change of logfile.
accel/tcg/cpu-exec.c | 4 +-
accel/tcg/translate-all.c | 4 +-
accel/tcg/translator.c | 4 +-
exec.c | 4 +-
hw/net/can/can_sja1000.c | 4 +-
include/exec/log.h | 33 +++++++++--
include/qemu/log.h | 49 +++++++++++++---
net/can/can_socketcan.c | 5 +-
target/cris/translate.c | 4 +-
target/i386/translate.c | 5 +-
target/lm32/translate.c | 4 +-
target/microblaze/translate.c | 4 +-
target/nios2/translate.c | 4 +-
target/tilegx/translate.c | 7 ++-
target/unicore32/translate.c | 4 +-
tcg/tcg.c | 28 ++++++----
tests/test-logging.c | 80 ++++++++++++++++++++++++++
util/log.c | 102 ++++++++++++++++++++++++++--------
18 files changed, 275 insertions(+), 74 deletions(-)
--
2.17.1
- [PATCH v2 0/6] Make the qemu_logfile handle thread safe.,
Robert Foley <=
- [PATCH v2 1/6] Fix double free issue in qemu_set_log_filename()., Robert Foley, 2019/11/15
- [PATCH v2 3/6] Add a mutex to guarantee single writer to qemu_logfile handle., Robert Foley, 2019/11/15
- [PATCH v2 2/6] Cleaned up flow of code in qemu_set_log(), to simplify and clarify., Robert Foley, 2019/11/15
- [PATCH v2 4/6] qemu_log_lock/unlock now preserves the qemu_logfile handle., Robert Foley, 2019/11/15
- [PATCH v2 5/6] Add use of RCU for qemu_logfile., Robert Foley, 2019/11/15