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soon I will dump every stage to find out WHAT is c

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ausing corruption
This commit is contained in:
tildearrow 2025-04-12 20:15:17 -05:00
parent cb23036f9e
commit 4b7364fac9
1 changed files with 28 additions and 32 deletions
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60
src/engine/cmdStreamOps.cpp
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@ -663,12 +663,12 @@ SafeWriter* stripNops(SafeWriter* s) {
case 0xfa: { // jmp
unsigned int addr=buf[i+1]|(buf[i+2]<<8)|(buf[i+3]<<16)|(buf[i+4]<<24);
assert(!(addr&7));
if (buf[addr]==0xf1) {
logE("POINTS TO NOP");
if (addr>=oldStream->size()) {
logE("OUT OF BOUNDS!");
abort();
}
if (buf[addr]>=oldStream->size()) {
logE("OUT OF BOUNDS!");
if (buf[addr]==0xf1) {
logE("POINTS TO NOP");
abort();
}
try {
@ -890,11 +890,15 @@ SafeWriter* findSubBlocks(SafeWriter* stream, std::vector<SafeWriter*>& subBlock
// test all lengths
for (size_t len=minSize; len<=maxSize; len+=8) {
testLenMatches.clear();
assert(!(len&7));
// filter matches
for (BlockMatch& k: testMatches) {
// match length shall be greater than or equal to current length
if (len>k.len) continue;
assert(!(k.orig&7));
assert(memcmp(&buf[k.orig],&buf[k.block],len)==0);
// check for bad matches, which include:
// - match overlapping with itself
// - block only consisting of calls
@ -904,10 +908,10 @@ SafeWriter* findSubBlocks(SafeWriter* stream, std::vector<SafeWriter*>& subBlock
if (OVERLAPS(k.orig,k.orig+len,k.block,k.block+len)) continue;
// 2. only calls and jmp/ret/stop
bool metCriteria=false;
bool metCriteria=true;
for (size_t l=k.orig; l<k.orig+len; l+=8) {
if (buf[l]!=0xf4 && buf[l]!=0xf5) {
metCriteria=true;
if (buf[l]==0xf4 && buf[l]==0xf5) {
metCriteria=false;
break;
}
}
@ -977,6 +981,11 @@ SafeWriter* findSubBlocks(SafeWriter* stream, std::vector<SafeWriter*>& subBlock
size_t subBlockID=subBlocks.size();
logV("new sub-block %d",(int)subBlockID);
assert(!(bestOrig&7));
for (size_t i=bestOrig; i<bestOrig+bestBenefit.len; i+=8) {
assert(buf[i]!=0xf9);
}
// isolate this sub-block
SafeWriter* newBlock=new SafeWriter;
newBlock->init();
@ -1012,6 +1021,11 @@ SafeWriter* findSubBlocks(SafeWriter* stream, std::vector<SafeWriter*>& subBlock
// skip invalid matches
if (i.done) continue;
assert(!(i.block&7));
for (size_t j=i.block; j<i.block+bestBenefit.len; j+=8) {
assert(buf[j]!=0xf9);
}
// set match to this sub-block
buf[i.block]=0xf4;
buf[i.block+1]=subBlockID&0xff;
@ -1023,7 +1037,7 @@ SafeWriter* findSubBlocks(SafeWriter* stream, std::vector<SafeWriter*>& subBlock
buf[i.block+7]=0;
// replace the rest with nop
for (size_t j=i.block+8; j<i.block+i.len; j++) {
for (size_t j=i.block+8; j<i.block+bestBenefit.len; j++) {
buf[j]=0xf1;
}
}
@ -1480,30 +1494,11 @@ SafeWriter* DivEngine::saveCommand(DivCSProgress* progress, unsigned int disable
for (size_t i=0; i<subBlocks.size(); i++) {
SafeWriter* block=subBlocks[i];
// check whether this block is duplicate
int dupOf=-1;
for (size_t j=0; j<i; j++) {
if (subBlocks[j]->size()==subBlocks[i]->size()) {
if (memcmp(subBlocks[j]->getFinalBuf(),subBlocks[i]->getFinalBuf(),subBlocks[j]->size())==0) {
logW("we have one");
dupOf=j;
break;
}
}
}
if (dupOf>=0) {
// push address of original block (discard duplicate)
blockOff.push_back(blockOff[dupOf]);
logW("did you say DUPLICATE?!");
abort();
} else {
// write sub-block
blockOff.push_back(globalStream->tell());
logV("block size: %d",(int)block->size());
assert(!(block->size()&7));
globalStream->write(block->getFinalBuf(),block->size());
}
// write sub-block
blockOff.push_back(globalStream->tell());
logV("block size: %d",(int)block->size());
assert(!(block->size()&7));
globalStream->write(block->getFinalBuf(),block->size());
}
for (SafeWriter* block: subBlocks) {
@ -1527,6 +1522,7 @@ SafeWriter* DivEngine::saveCommand(DivCSProgress* progress, unsigned int disable
buf[j+4]=(addr>>24)&0xff;
} else {
logE("requested symbol %d is out of bounds!",addr);
abort();
}
}
}