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runtime: work around 5c bug in GC code. 

5c miscompiles *p++ = struct_literal.

R=dave, golang-dev
CC=golang-dev
https://golang.org/cl/7065069
This commit is contained in:
Rémy Oudompheng 2013-01-11 00:59:44 +01:00
parent 9204eb4d3c
commit 6e981c181c
1 changed files with 8 additions and 4 deletions
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12
src/pkg/runtime/mgc0.c
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@ -338,7 +338,8 @@ flushptrbuf(PtrTarget *ptrbuf, PtrTarget **ptrbufpos, Obj **_wp, Workbuf **_wbuf
if((bits & (bitAllocated|bitMarked)) != bitAllocated)
continue;
*bitbufpos++ = (BitTarget){obj, ti, bitp, shift};
*bitbufpos = (BitTarget){obj, ti, bitp, shift};
bitbufpos++;
}
runtime·lock(&lock);
@ -541,7 +542,8 @@ scanblock(Workbuf *wbuf, Obj *wp, uintptr nobj, bool keepworking)
// iface->tab
if((void*)iface->tab >= arena_start && (void*)iface->tab < arena_used) {
*ptrbufpos++ = (PtrTarget){iface->tab, (uintptr)itabtype->gc};
*ptrbufpos = (PtrTarget){iface->tab, (uintptr)itabtype->gc};
ptrbufpos++;
if(ptrbufpos == ptrbuf_end)
flushptrbuf(ptrbuf, &ptrbufpos, &wp, &wbuf, &nobj, bitbuf);
}
@ -568,7 +570,8 @@ scanblock(Workbuf *wbuf, Obj *wp, uintptr nobj, bool keepworking)
stack_top.b += PtrSize;
obj = *(byte**)i;
if(obj >= arena_start && obj < arena_used) {
*ptrbufpos++ = (PtrTarget){obj, 0};
*ptrbufpos = (PtrTarget){obj, 0};
ptrbufpos++;
if(ptrbufpos == ptrbuf_end)
flushptrbuf(ptrbuf, &ptrbufpos, &wp, &wbuf, &nobj, bitbuf);
}
@ -654,7 +657,8 @@ scanblock(Workbuf *wbuf, Obj *wp, uintptr nobj, bool keepworking)
}
if(obj >= arena_start && obj < arena_used) {
*ptrbufpos++ = (PtrTarget){obj, objti};
*ptrbufpos = (PtrTarget){obj, objti};
ptrbufpos++;
if(ptrbufpos == ptrbuf_end)
flushptrbuf(ptrbuf, &ptrbufpos, &wp, &wbuf, &nobj, bitbuf);
}