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runtime: run getgcmask on the M stack.

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LGTM=rsc
R=rsc, khr
CC=golang-codereviews
https://golang.org/cl/132660043
This commit is contained in:
Keith Randall 2014-09-05 14:59:31 -07:00
parent 277ef8fa07
commit 005806cab1
3 changed files with 14 additions and 10 deletions
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13
src/pkg/runtime/export_test.go
View File

@ -111,8 +111,19 @@ func ParForIters(desc *ParFor, tid uint32) (uint32, uint32) {
return begin, end
}
// in mgc0.c
//go:noescape
func GCMask(x interface{}) []byte
func getgcmask(data unsafe.Pointer, typ *_type, array **byte, len *uint)
func GCMask(x interface{}) (ret []byte) {
e := (*eface)(unsafe.Pointer(&x))
s := (*slice)(unsafe.Pointer(&ret))
onM(func() {
getgcmask(e.data, e._type, &s.array, &s.len)
s.cap = s.len
})
return
}
func testSchedLocalQueue()
func testSchedLocalQueueSteal()

4
src/pkg/runtime/mgc0.c
View File

@ -1805,7 +1805,7 @@ getgcmaskcb(Stkframe *frame, void *ctxt)
Stkframe *frame0;
frame0 = ctxt;
if(frame0->sp >= frame->varp - frame->sp && frame0->sp < frame->varp) {
if(frame->sp <= frame0->sp && frame0->sp < frame->varp) {
*frame0 = *frame;
return false;
}
@ -1865,7 +1865,7 @@ runtime·getgcmask(byte *p, Type *t, byte **mask, uintptr *len)
frame.fn = nil;
frame.sp = (uintptr)p;
cb = getgcmaskcb;
runtime·gentraceback((uintptr)runtime·getcallerpc(&p), (uintptr)runtime·getcallersp(&p), 0, g, 0, nil, 1000, &cb, &frame, false);
runtime·gentraceback(g->m->curg->sched.pc, g->m->curg->sched.sp, 0, g->m->curg, 0, nil, 1000, &cb, &frame, false);
if(frame.fn != nil) {
Func *f;
StackMap *stackmap;

7
src/pkg/runtime/stubs.goc
View File

@ -54,13 +54,6 @@ func runtime·gomcache() (ret *MCache) {
ret = g->m->mcache;
}
// For testing.
// TODO: find a better place for this.
func GCMask(x Eface) (mask Slice) {
runtime·getgcmask(x.data, x.type, &mask.array, &mask.len);
mask.cap = mask.len;
}
#pragma textflag NOSPLIT
func reflect·typelinks() (ret Slice) {
extern Type *runtime·typelink[], *runtime·etypelink[];