ascope for exec

fix forkexectree

ascope for exec
d749270e · Nickolai Zeldovich · 8a1a20a6 · d749270e · d749270e
--- a/bin/forkexectree.cc
+++ b/bin/forkexectree.cc
 #include "types.h"
 #include "stat.h"
 #include "user.h"
-#include "mtrace.h"

 #define NCHILD 2
 #define NDEPTH 7
@@ -11,7 +10,6 @@ forktree(int depth)
 {
  if (depth == 0) {
    fprintf(1, "%d: forkexectree\n", getpid());
-    mtenable("xv6-forkexectree");
  }

  if (depth >= NDEPTH)
@@ -48,9 +46,6 @@ forktree(int depth)
  if (depth > 0)
    exit();

-  mtops(0);
-  mtdisable("xv6-forkexectree");
-  
  fprintf(1, "%d: forkexectree OK\n", getpid());
  // halt();
 }

--- a/kernel/sysfile.cc
+++ b/kernel/sysfile.cc
@@ -428,6 +428,9 @@ sys_exec(const char *path, u64 uargv)
  if(argcheckstr(path) < 0) {
    return -1;
  }
+
+  mt_ascope ascope("%s(%s)", __func__, path);
+
  memset(argv, 0, sizeof(argv));
  for(i=0;; i++){
    if(i >= NELEM(argv))