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. Robert Foley (4): Add a mutex to guarantee single writer to qemu_logfile handle. Add use of RCU for qemu_logfile. qemu_log_lock/unlock now preserves the qemu_logfile handle. 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 | 51 +++++++++++++++--- 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 | 74 ++++++++++++++++++++++++++ util/log.c | 99 ++++++++++++++++++++++++++++------- 18 files changed, 273 insertions(+), 69 deletions(-) -- 2.17.1