diff options
| author | Russ Cox <rsc@golang.org> | 2014-12-29 11:47:04 -0500 |
|---|---|---|
| committer | Russ Cox <rsc@golang.org> | 2015-01-06 00:27:49 +0000 |
| commit | e5ef657264ef9b7c0bcd9b5c437fea2d602a2030 (patch) | |
| tree | c93ef433b71a4c38ad58fb98e10c8fd49136efa7 /src | |
| parent | 54bb4dc3906578403aca1c57b482761a6824f079 (diff) | |
| download | go-e5ef657264ef9b7c0bcd9b5c437fea2d602a2030.tar.xz | |
cmd/gc: add write barrier in copy of function parameters to heap
Found with GODEBUG=wbshadow=2 mode.
Eventually that will run automatically, but right now
it still detects other missing write barriers.
Change-Id: I1320d5340a9e421c779f24f3b170e33974e56e4f
Reviewed-on: https://go-review.googlesource.com/2278
Reviewed-by: Rick Hudson <rlh@golang.org>
Diffstat (limited to 'src')
| -rw-r--r-- | src/cmd/gc/typecheck.c | 1 | ||||
| -rw-r--r-- | src/cmd/gc/walk.c | 12 |
2 files changed, 10 insertions, 3 deletions
diff --git a/src/cmd/gc/typecheck.c b/src/cmd/gc/typecheck.c index 4512767c38..aa693aff7f 100644 --- a/src/cmd/gc/typecheck.c +++ b/src/cmd/gc/typecheck.c @@ -2786,6 +2786,7 @@ islvalue(Node *n) case OIND: case ODOTPTR: case OCLOSUREVAR: + case OPARAM: return 1; case ODOT: return islvalue(n->left); diff --git a/src/cmd/gc/walk.c b/src/cmd/gc/walk.c index df97f17670..99611efce8 100644 --- a/src/cmd/gc/walk.c +++ b/src/cmd/gc/walk.c @@ -462,6 +462,7 @@ walkexpr(Node **np, NodeList **init) case ONONAME: case OINDREG: case OEMPTY: + case OPARAM: goto ret; case ONOT: @@ -2519,7 +2520,7 @@ paramstoheap(Type **argin, int out) { Type *t; Iter savet; - Node *v; + Node *v, *as; NodeList *nn; nn = nil; @@ -2544,8 +2545,13 @@ paramstoheap(Type **argin, int out) if(v->alloc == nil) v->alloc = callnew(v->type); nn = list(nn, nod(OAS, v->heapaddr, v->alloc)); - if((v->class & ~PHEAP) != PPARAMOUT) - nn = list(nn, nod(OAS, v, v->stackparam)); + if((v->class & ~PHEAP) != PPARAMOUT) { + as = nod(OAS, v, v->stackparam); + v->stackparam->typecheck = 1; + typecheck(&as, Etop); + as = applywritebarrier(as, &nn); + nn = list(nn, as); + } } return nn; } |