#ifndef QEMU_LOG_H
#define QEMU_LOG_H
+/* A small part of this API is split into its own header */
+#include "qemu/log-for-trace.h"
+#include "qemu/rcu.h"
+
+typedef struct QemuLogFile {
+ struct rcu_head rcu;
+ FILE *fd;
+} QemuLogFile;
+
+/* Private global variable, don't use */
+extern QemuLogFile *qemu_logfile;
-/* Private global variables, don't use */
-extern FILE *qemu_logfile;
-extern int qemu_loglevel;
/*
* The new API:
*/
static inline bool qemu_log_separate(void)
{
- return qemu_logfile != NULL && qemu_logfile != stderr;
+ QemuLogFile *logfile;
+ bool res = false;
+
+ rcu_read_lock();
+ logfile = qatomic_rcu_read(&qemu_logfile);
+ if (logfile && logfile->fd != stderr) {
+ res = true;
+ }
+ rcu_read_unlock();
+ return res;
}
#define CPU_LOG_TB_OUT_ASM (1 << 0)
#define CPU_LOG_MMU (1 << 12)
#define CPU_LOG_TB_NOCHAIN (1 << 13)
#define CPU_LOG_PAGE (1 << 14)
-#define LOG_TRACE (1 << 15)
-
-/* Returns true if a bit is set in the current loglevel mask
+/* LOG_TRACE (1 << 15) is defined in log-for-trace.h */
+#define CPU_LOG_TB_OP_IND (1 << 16)
+#define CPU_LOG_TB_FPU (1 << 17)
+#define CPU_LOG_PLUGIN (1 << 18)
+/* LOG_STRACE is used for user-mode strace logging. */
+#define LOG_STRACE (1 << 19)
+
+/* Lock output for a series of related logs. Since this is not needed
+ * for a single qemu_log / qemu_log_mask / qemu_log_mask_and_addr, we
+ * assume that qemu_loglevel_mask has already been tested, and that
+ * qemu_loglevel is never set when qemu_logfile is unset.
*/
-static inline bool qemu_loglevel_mask(int mask)
+
+static inline FILE *qemu_log_lock(void)
{
- return (qemu_loglevel & mask) != 0;
+ QemuLogFile *logfile;
+ rcu_read_lock();
+ logfile = qatomic_rcu_read(&qemu_logfile);
+ if (logfile) {
+ qemu_flockfile(logfile->fd);
+ return logfile->fd;
+ } else {
+ return NULL;
+ }
}
-/* Logging functions: */
+static inline void qemu_log_unlock(FILE *fd)
+{
+ if (fd) {
+ qemu_funlockfile(fd);
+ }
+ rcu_read_unlock();
+}
-/* main logging function
- */
-void GCC_FMT_ATTR(1, 2) qemu_log(const char *fmt, ...);
+/* Logging functions: */
/* vfprintf-like logging function
*/
static inline void GCC_FMT_ATTR(1, 0)
qemu_log_vprintf(const char *fmt, va_list va)
{
- if (qemu_logfile) {
- vfprintf(qemu_logfile, fmt, va);
+ QemuLogFile *logfile;
+
+ rcu_read_lock();
+ logfile = qatomic_rcu_read(&qemu_logfile);
+ if (logfile) {
+ vfprintf(logfile->fd, fmt, va);
}
+ rcu_read_unlock();
}
-/* log only if a bit is set on the current loglevel mask
+/* log only if a bit is set on the current loglevel mask:
+ * @mask: bit to check in the mask
+ * @fmt: printf-style format string
+ * @args: optional arguments for format string
*/
-void GCC_FMT_ATTR(2, 3) qemu_log_mask(int mask, const char *fmt, ...);
+#define qemu_log_mask(MASK, FMT, ...) \
+ do { \
+ if (unlikely(qemu_loglevel_mask(MASK))) { \
+ qemu_log(FMT, ## __VA_ARGS__); \
+ } \
+ } while (0)
+/* log only if a bit is set on the current loglevel mask
+ * and we are in the address range we care about:
+ * @mask: bit to check in the mask
+ * @addr: address to check in dfilter
+ * @fmt: printf-style format string
+ * @args: optional arguments for format string
+ */
+#define qemu_log_mask_and_addr(MASK, ADDR, FMT, ...) \
+ do { \
+ if (unlikely(qemu_loglevel_mask(MASK)) && \
+ qemu_log_in_addr_range(ADDR)) { \
+ qemu_log(FMT, ## __VA_ARGS__); \
+ } \
+ } while (0)
/* Maintenance: */
-/* fflush() the log file */
-static inline void qemu_log_flush(void)
-{
- fflush(qemu_logfile);
-}
-
-/* Close the log file */
-static inline void qemu_log_close(void)
-{
- if (qemu_logfile) {
- if (qemu_logfile != stderr) {
- fclose(qemu_logfile);
- }
- qemu_logfile = NULL;
- }
-}
-
/* define log items */
typedef struct QEMULogItem {
int mask;
extern const QEMULogItem qemu_log_items[];
-/* This is the function that actually does the work of
- * changing the log level; it should only be accessed via
- * the qemu_set_log() wrapper.
- */
-void do_qemu_set_log(int log_flags, bool use_own_buffers);
-
-static inline void qemu_set_log(int log_flags)
-{
-#ifdef CONFIG_USER_ONLY
- do_qemu_set_log(log_flags, true);
-#else
- do_qemu_set_log(log_flags, false);
-#endif
-}
-
-void qemu_set_log_filename(const char *filename);
+void qemu_set_log(int log_flags);
+void qemu_log_needs_buffers(void);
+void qemu_set_log_filename(const char *filename, Error **errp);
+void qemu_set_dfilter_ranges(const char *ranges, Error **errp);
+bool qemu_log_in_addr_range(uint64_t addr);
int qemu_str_to_log_mask(const char *str);
/* Print a usage message listing all the valid logging categories
*/
void qemu_print_log_usage(FILE *f);
+/* fflush() the log file */
+void qemu_log_flush(void);
+/* Close the log file */
+void qemu_log_close(void);
+
#endif
projects / qemu.git / blobdiff