syscall trace finished

kernel/proc.c

@@ -146,6 +146,9 @@ found:
   p->context.ra = (uint64)forkret;
   p->context.sp = p->kstack + PGSIZE;
 
+  // 初始化计数器
+  memset(p->syscall_counts, 0, sizeof(p->syscall_counts));
+
   return p;
 }
 

kernel/proc.h

@@ -1,3 +1,4 @@
+#include "defs.h"
 // Saved registers for kernel context switches.
 struct context {
   uint64 ra;
@@ -105,4 +106,5 @@ struct proc {
   struct file *ofile[NOFILE];  // Open files
   struct inode *cwd;           // Current directory
   char name[16];               // Process name (debugging)
+  int syscall_counts[24]; // 每个系统调用的调用次数
 };

kernel/syscall.c

@@ -147,7 +147,9 @@ syscall(void)
     // and store its return value in p->trapframe->a0
     p->trapframe->a0 = syscalls[num]();
     if (p->tracemask & (1 << num)) {
-       printf("%d: syscall %s -> %d\n",p->pid, syscalls_name[num], p->trapframe->a0);
+       p->syscall_counts[num]++;
+       printf("%d: syscall %s(trace counts: %d) -> %d\n",
+             p->pid, syscalls_name[num], p->syscall_counts[num], p->trapframe->a0);
     }
   } else {
     printf("%d %s: unknown sys call %d\n",