| #include "threadimpl.h" |
| /* |
| * To use this you need some patches to Valgrind that |
| * let it help out with detecting stack overflow. |
| */ |
| #define USEVALGRIND 0 |
| #ifdef USEVALGRIND |
| #include <valgrind/memcheck.h> |
| #endif |
| |
| static void |
| launcher386(void (*f)(void *arg), void *arg) |
| { |
| Proc *p; |
| Thread *t; |
| |
| p = _threadgetproc(); |
| t = p->thread; |
| _threadstacklimit(t->stk); |
| |
| (*f)(arg); |
| threadexits(nil); |
| } |
| |
| void |
| _threadinitstack(Thread *t, void (*f)(void*), void *arg) |
| { |
| ulong *tos; |
| |
| tos = (ulong*)&t->stk[t->stksize&~7]; |
| *--tos = (ulong)arg; |
| *--tos = (ulong)f; |
| t->sched.pc = (ulong)launcher386; |
| t->sched.sp = (ulong)tos - 8; /* old PC and new PC */ |
| } |
| |
| void |
| _threadinswitch(int enter) |
| { |
| USED(enter); |
| #ifdef USEVALGRIND |
| if(enter) |
| VALGRIND_SET_STACK_LIMIT(0, 0, 1); |
| else |
| VALGRIND_SET_STACK_LIMIT(0, 0, 0); |
| #endif |
| } |
| |
| void |
| _threadstacklimit(void *addr) |
| { |
| USED(addr); |
| |
| #ifdef USEVALGRIND |
| VALGRIND_SET_STACK_LIMIT(1, addr, 0); |
| #endif |
| } |