tinygo-org/tinygo
1
0
Fork 0
mirror of https://github.com/tinygo-org/tinygo.git synced 2026-08-18 11:33:59 +00:00
Code Issues Packages Projects Releases 6 Wiki Activity

interp: fix copy() from/to external buffers

Browse Source 
This includes copying from a //go:embed slice for example. The slice
with data is not available at interp time.

See: https://github.com/tinygo-org/tinygo/issues/4895
This commit is contained in:
Ayke van Laethem
2025-05-21 13:23:35 +02:00
committed by Ron Evans
parent 704489ed6d
commit cb5f7ad3fd
3 changed files with 42 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
interp/interpreter.go
+14 -1
View File
@@ -364,9 +364,22 @@ func (r *runner) run(fn *function, params []value, parentMem *memoryView, indent
continue
}
nBytes := uint32(n * elemSize)
srcObj := mem.get(src.index())
dstObj := mem.getWritable(dst.index())
if srcObj.buffer == nil || dstObj.buffer == nil {
// If the buffer is nil, it means the slice is external.
// This can happen for example when copying data out of
// a //go:embed slice, which is not available at interp
// time.
// See: https://github.com/tinygo-org/tinygo/issues/4895
err := r.runAtRuntime(fn, inst, locals, &mem, indent)
if err != nil {
return nil, mem, err
}
continue
}
dstBuf := dstObj.buffer.asRawValue(r)
srcBuf := mem.get(src.index()).buffer.asRawValue(r)
srcBuf := srcObj.buffer.asRawValue(r)
copy(dstBuf.buf[dst.offset():dst.offset()+nBytes], srcBuf.buf[src.offset():])
dstObj.buffer = dstBuf
mem.put(dst.index(), dstObj)