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abort if vsnprintf() overflows in makeByteArray

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This commit is contained in:
Joel Dice 2007-10-26 18:03:28 -06:00
parent 46ac6f92ee
commit fcc50f4da6
1 changed files with 3 additions and 2 deletions
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5
src/machine.cpp
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@ -376,10 +376,11 @@ postCollect(Thread* t)
object object
makeByteArray(Thread* t, const char* format, va_list a) makeByteArray(Thread* t, const char* format, va_list a)
{ {
static const unsigned Size = 256; const int Size = 256;
char buffer[Size]; char buffer[Size];
vsnprintf(buffer, Size - 1, format, a); int r = vsnprintf(buffer, Size - 1, format, a);
expect(t, r >= 0 and r < Size - 1);
object s = makeByteArray(t, strlen(buffer) + 1, false); object s = makeByteArray(t, strlen(buffer) + 1, false);
memcpy(&byteArrayBody(t, s, 0), buffer, byteArrayLength(t, s)); memcpy(&byteArrayBody(t, s, 0), buffer, byteArrayLength(t, s));