Add helper to run a function as a routine kmsg
[akaros.git] / kern / include / syscall.h
index cdcbe2a..304b4e8 100644 (file)
@@ -1,36 +1,64 @@
-#ifndef ROS_KERN_SYSCALL_H
-#define ROS_KERN_SYSCALL_H
+#pragma once
 #ifndef ROS_KERNEL
 # error "This is ROS kernel header; user programs should not #include it"
 #endif
 
 #include <ros/common.h>
+#include <ros/syscall.h>
 #include <process.h>
+#include <kref.h>
+#include <ns.h>
+#include <bitmap.h>
 
 #define SYSTRACE_ON                                    0x01
 #define SYSTRACE_LOUD                          0x02
 #define SYSTRACE_ALLPROC                       0x04
 
-#define MAX_NUM_TRACED                         10
 #define MAX_SYSTRACES                          1024
 
+#define SYSCALL_STRLEN                         128
+
 #define MAX_ASRC_BATCH                         10
 
-/* Consider cache aligning this */
+#define SYSTR_RECORD_SZ                                256
+#define SYSTR_PRETTY_BUF_SZ                    (SYSTR_BUF_SZ -                            \
+                                     sizeof(struct systrace_record))
 struct systrace_record {
-       uint64_t                timestamp;
-       uintreg_t               syscallno;
-       uintreg_t               arg0;
-       uintreg_t               arg1;
-       uintreg_t               arg2;
-       uintreg_t               arg3;
-       uintreg_t               arg4;
-       uintreg_t               arg5;
-       int                             pid;
-       uint32_t                coreid;
-       uint32_t                vcoreid;
+       struct systrace_record_anon {
+               uint64_t                start_timestamp, end_timestamp;
+               uintreg_t               syscallno;
+               uintreg_t               arg0;
+               uintreg_t               arg1;
+               uintreg_t               arg2;
+               uintreg_t               arg3;
+               uintreg_t               arg4;
+               uintreg_t               arg5;
+               uintreg_t               retval;
+               int                             pid;
+               uint32_t                coreid;
+               uint32_t                vcoreid;
+               char                    *pretty_buf;
+               uint8_t                 datalen;
+               int                             errno;
+       };
+       uint8_t                 data[SYSTR_RECORD_SZ - sizeof(struct systrace_record_anon)];
+};
+
+struct strace {
+       bool tracing;
+       bool inherit;
+       bool drop_overflow;
+       atomic_t nr_drops;
+       unsigned long appx_nr_sysc;
+       struct kref procs; /* when procs goes to zero, q is hung up. */
+       struct kref users; /* when users goes to zero, q and struct are freed. */
+       struct queue *q;
+       spinlock_t lock;
+       DECLARE_BITMAP(trace_set, MAX_SYSCALL_NR);
 };
 
+extern bool systrace_loud;
+
 /* Syscall table */
 typedef intreg_t (*syscall_t)(struct proc *, uintreg_t, uintreg_t, uintreg_t,
                               uintreg_t, uintreg_t, uintreg_t);
@@ -48,22 +76,16 @@ intreg_t syscall(struct proc *p, uintreg_t sc_num, uintreg_t a0, uintreg_t a1,
 void set_errno(int errno);
 int get_errno(void);
 void unset_errno(void);
-void set_errstr(char *errstr, ...);
+void vset_errstr(const char *fmt, va_list ap);
+void set_errstr(const char *errstr, ...);
 char *current_errstr(void);
+void set_error(int error, const char *fmt, ...);
 struct errbuf *get_cur_errbuf(void);
 void set_cur_errbuf(struct errbuf *ebuf);
 char *get_cur_genbuf(void);
 void __signal_syscall(struct syscall *sysc, struct proc *p);
 
-/* Tracing functions */
-void systrace_start(bool silent);
-void systrace_stop(void);
-int systrace_reg(bool all, struct proc *p);
-int systrace_dereg(bool all, struct proc *p);
-void systrace_print(bool all, struct proc *p);
-void systrace_clear_buffer(void);
-
 /* Utility */
 bool syscall_uses_fd(struct syscall *sysc, int fd);
-
-#endif /* !ROS_KERN_SYSCALL_H */
+void print_sysc(struct proc *p, struct syscall *sysc);
+void kth_panic_sysc(struct kthread *kth);