gh0s7/mckernel
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ptrace: Add PTRACE_O_TRACEFORK (fake) support.

Browse Source
This commit is contained in:
Naoki Hamada
2014-10-15 16:19:42 +09:00
committed by postpeta
parent 55f7ee1526
commit fcfa94cea1
1 changed files with 17 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
kernel/syscall.c
View File

@ -1740,6 +1740,19 @@ SYSCALL_DECLARE(vfork)
SYSCALL_DECLARE(clone)
{
/* If CLONE_VM flag is not present, we assume this clone(2)
* request is induced by the fork(2) wrapper of glibc.
*/
if ((ihk_mc_syscall_arg0(ctx) & CLONE_VM) == 0) {
if (cpu_local_var(current)->ftn == NULL) {
panic("No ftn for current process present.\n");
}
if ((cpu_local_var(current)->ftn->ptrace &
PTRACE_O_TRACEFORK) != 0) {
panic("We do not have PTRACE_O_TRACEFORK implementation yet.\n");
}
}
return do_fork((int)ihk_mc_syscall_arg0(ctx), ihk_mc_syscall_arg1(ctx),
ihk_mc_syscall_arg2(ctx), ihk_mc_syscall_arg3(ctx),
ihk_mc_syscall_arg4(ctx), ihk_mc_syscall_pc(ctx),
@ -2504,9 +2517,11 @@ static int ptrace_setoptions(int pid, int flags)
unsigned long irqstate;
/* Only supported options are enabled.
* PTRACE_O_TRACESYSGOOD is pretended to be supported for the time being.
* Following options are pretended to be supported for the time being:
* PTRACE_O_TRACESYSGOOD
* PTRACE_O_TRACEFORK
*/
if (flags & ~PTRACE_O_TRACESYSGOOD) {
if (flags & ~(PTRACE_O_TRACESYSGOOD|PTRACE_O_TRACEFORK)) {
kprintf("ptrace_setoptions: not supported flag %x\n", flags);
ret = -EINVAL;
goto out;