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assign the same TID and PID to the new process after fork()

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Balazs Gerofi bgerofi@riken.jp
2014-04-15 20:40:40 +09:00
parent 0285c99c9c
commit d6c0ea7627
1 changed files with 6 additions and 3 deletions
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9
kernel/syscall.c
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@@ -981,6 +981,9 @@ SYSCALL_DECLARE(clone)
if (clone_flags & CLONE_VM) { if (clone_flags & CLONE_VM) {
new->pid = cpu_local_var(current)->pid; new->pid = cpu_local_var(current)->pid;
request1.number = __NR_gettid;
new->tid = do_syscall(&request1, &ctx1, cpuid, new->pid);
} }
/* fork() a new process on the host */ /* fork() a new process on the host */
else { else {
@@ -994,6 +997,9 @@ SYSCALL_DECLARE(clone)
return -EFAULT; return -EFAULT;
} }
/* In a single threaded process TID equals to PID */
new->tid = new->pid;
dkprintf("fork(): new pid: %d\n", new->pid); dkprintf("fork(): new pid: %d\n", new->pid);
/* clear user space PTEs and set new rpgtable so that consequent /* clear user space PTEs and set new rpgtable so that consequent
* page faults will look up the right mappings */ * page faults will look up the right mappings */
@@ -1012,9 +1018,6 @@ SYSCALL_DECLARE(clone)
} }
} }
request1.number = __NR_gettid;
new->tid = do_syscall(&request1, &ctx1, cpuid, new->pid);
if (clone_flags & CLONE_PARENT_SETTID) { if (clone_flags & CLONE_PARENT_SETTID) {
dkprintf("clone_flags & CLONE_PARENT_SETTID: 0x%lX\n", dkprintf("clone_flags & CLONE_PARENT_SETTID: 0x%lX\n",
(unsigned long)ihk_mc_syscall_arg2(ctx)); (unsigned long)ihk_mc_syscall_arg2(ctx));