diff options
Diffstat (limited to 'src/pkg/runtime/proc.c')
| -rw-r--r-- | src/pkg/runtime/proc.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/src/pkg/runtime/proc.c b/src/pkg/runtime/proc.c index 914a02e0b..de4f70153 100644 --- a/src/pkg/runtime/proc.c +++ b/src/pkg/runtime/proc.c @@ -1499,14 +1499,14 @@ save(void *pc, uintptr sp) // entersyscall is going to return immediately after. #pragma textflag NOSPLIT void -·entersyscall(int32 dummy) +runtime·reentersyscall(void *pc, uintptr sp) { // Disable preemption because during this function g is in Gsyscall status, // but can have inconsistent g->sched, do not let GC observe it. m->locks++; // Leave SP around for GC and traceback. - save(runtime·getcallerpc(&dummy), runtime·getcallersp(&dummy)); + save(pc, sp); g->syscallsp = g->sched.sp; g->syscallpc = g->sched.pc; g->syscallstack = g->stackbase; @@ -1525,7 +1525,7 @@ void runtime·notewakeup(&runtime·sched.sysmonnote); } runtime·unlock(&runtime·sched); - save(runtime·getcallerpc(&dummy), runtime·getcallersp(&dummy)); + save(pc, sp); } m->mcache = nil; @@ -1538,7 +1538,7 @@ void runtime·notewakeup(&runtime·sched.stopnote); } runtime·unlock(&runtime·sched); - save(runtime·getcallerpc(&dummy), runtime·getcallersp(&dummy)); + save(pc, sp); } // Goroutines must not split stacks in Gsyscall status (it would corrupt g->sched). @@ -1548,6 +1548,13 @@ void m->locks--; } +#pragma textflag NOSPLIT +void +·entersyscall(int32 dummy) +{ + runtime·reentersyscall(runtime·getcallerpc(&dummy), runtime·getcallersp(&dummy)); +} + // The same as runtime·entersyscall(), but with a hint that the syscall is blocking. #pragma textflag NOSPLIT void @@ -1588,10 +1595,13 @@ void // from the low-level system calls used by the runtime. #pragma textflag NOSPLIT void -runtime·exitsyscall(void) +·exitsyscall(int32 dummy) { m->locks++; // see comment in entersyscall + if(runtime·getcallersp(&dummy) > g->syscallsp) + runtime·throw("exitsyscall: syscall frame is no longer valid"); + if(g->isbackground) // do not consider blocked scavenger for deadlock detection incidlelocked(-1); |