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runtime: tell the truth about BitVector type

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Dmitriy changed all the execution to interpret the BitVector
as an array of bytes. Update the declaration and generation
of the bitmaps to match, to avoid problems on big-endian
machines.

LGTM=khr
R=khr
CC=dvyukov, golang-codereviews
https://golang.org/cl/140570044
This commit is contained in:
Russ Cox 2014-09-12 07:36:23 -04:00
parent f0d44dbeaf
commit a7c6d89166
5 changed files with 25 additions and 21 deletions
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6
src/runtime/stack.c
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@ -370,8 +370,8 @@ adjustpointers(byte **scanp, BitVector *bv, AdjustInfo *adjinfo, Func *f)
num = bv->n / BitsPerPointer;
for(i = 0; i < num; i++) {
if(StackDebug >= 4)
runtime·printf(" %p:%s:%p\n", &scanp[i], mapnames[bv->data[i / (32 / BitsPerPointer)] >> (i * BitsPerPointer & 31) & 3], scanp[i]);
switch(bv->data[i / (32 / BitsPerPointer)] >> (i * BitsPerPointer & 31) & 3) {
runtime·printf(" %p:%s:%p\n", &scanp[i], mapnames[bv->bytedata[i / (8 / BitsPerPointer)] >> (i * BitsPerPointer & 7) & 3], scanp[i]);
switch(bv->bytedata[i / (8 / BitsPerPointer)] >> (i * BitsPerPointer & 7) & 3) {
case BitsDead:
if(runtime·debug.gcdead)
scanp[i] = (byte*)PoisonStack;
@ -394,7 +394,7 @@ adjustpointers(byte **scanp, BitVector *bv, AdjustInfo *adjinfo, Func *f)
}
break;
case BitsMultiWord:
switch(bv->data[(i+1) / (32 / BitsPerPointer)] >> ((i+1) * BitsPerPointer & 31) & 3) {
switch(bv->bytedata[(i+1) / (8 / BitsPerPointer)] >> ((i+1) * BitsPerPointer & 7) & 3) {
default:
runtime·throw("unexpected garbage collection bits");
case BitsEface: