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Changed array slice copying to call a runtime function when assertions or array bound checks are enabled instead of just doing a memcpy. This makes sure an exception is thrown if the copy is invalid (ie. different lengths or overlap). Fixes ticket #283 . Rebuilding the runtime is necessary.

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This commit is contained in:
Tomas Lindquist Olsen
2009-05-10 02:23:05 +02:00
parent 54d9955abc
commit dfea022a86
3 changed files with 39 additions and 4 deletions
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11
runtime/internal/arrayInit.d
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@@ -156,3 +156,14 @@ size_t _d_array_cast_len(size_t len, size_t elemsz, size_t newelemsz)
}
return (len*elemsz)/newelemsz;
}
// slice copy when assertions are enabled
void _d_array_slice_copy(void* dst, size_t dstlen, void* src, size_t srclen)
{
if (dstlen != srclen)
throw new Exception("lengths don't match for array copy");
else if (dst+dstlen <= src || src+srclen <= dst)
llvm_memcpy(dst, src, dstlen, 0);
else
throw new Exception("overlapping array copy");
}