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*: Use fprintf between qemu_log_trylock/unlock

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Inside qemu_log, we perform qemu_log_trylock/unlock, which need
not be done if we have already performed the lock beforehand.

Always check the result of qemu_log_trylock -- only checking
qemu_loglevel_mask races with the acquisition of the lock on
the logfile.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220417183019.755276-10-richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson
2022-04-17 11:29:49 -07:00
parent 6fef222971
commit 78b548583e
9 changed files with 162 additions and 132 deletions
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23
net/can/can_socketcan.c
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@ -77,18 +77,21 @@ static void can_host_socketcan_display_msg(struct qemu_can_frame *msg)
{
int i;
FILE *logfile = qemu_log_trylock();
qemu_log("[cansocketcan]: %03X [%01d] %s %s",
msg->can_id & QEMU_CAN_EFF_MASK,
msg->can_dlc,
msg->can_id & QEMU_CAN_EFF_FLAG ? "EFF" : "SFF",
msg->can_id & QEMU_CAN_RTR_FLAG ? "RTR" : "DAT");
for (i = 0; i < msg->can_dlc; i++) {
qemu_log(" %02X", msg->data[i]);
if (logfile) {
fprintf(logfile, "[cansocketcan]: %03X [%01d] %s %s",
msg->can_id & QEMU_CAN_EFF_MASK,
msg->can_dlc,
msg->can_id & QEMU_CAN_EFF_FLAG ? "EFF" : "SFF",
msg->can_id & QEMU_CAN_RTR_FLAG ? "RTR" : "DAT");
for (i = 0; i < msg->can_dlc; i++) {
fprintf(logfile, " %02X", msg->data[i]);
}
fprintf(logfile, "\n");
qemu_log_flush();
qemu_log_unlock(logfile);
}
qemu_log("\n");
qemu_log_flush();
qemu_log_unlock(logfile);
}
static void can_host_socketcan_read(void *opaque)