/*
* Compute the size, in bytes, of a DexCode.
*/
size_t dexGetDexCodeSize(const DexCode* pCode)
{
/*
* The catch handler data is the last entry. It has a variable number
* of variable-size pieces, so we need to create an iterator.
*/
u4 handlersSize;
u4 offset;
u4 ui;
if (pCode->triesSize != 0) {
handlersSize = dexGetHandlersSize(pCode);
offset = dexGetFirstHandlerOffset(pCode);
} else {
handlersSize = 0;
offset = 0;
}
for (ui = 0; ui < handlersSize; ui++) {
DexCatchIterator iterator;
dexCatchIteratorInit(&iterator, pCode, offset);
offset = dexCatchIteratorGetEndOffset(&iterator, pCode);
}
const u1* handlerData = dexGetCatchHandlerData(pCode);
//LOGD("+++ pCode=%p handlerData=%p last offset=%d\n",
// pCode, handlerData, offset);
/* return the size of the catch handler + everything before it */
return (handlerData - (u1*) pCode) + offset;
}
/* Get count of handler lists for the given DexCode. */
u4 dexGetHandlersSize(const DexCode* pCode) {
if (pCode->triesSize == 0) {
return 0;
}
const u1* data = dexGetCatchHandlerData(pCode);
return readUnsignedLeb128(&data);
}
/* Get the first handler offset for the given DexCode.
* It's not 0 because the handlers list is prefixed with its size
* (in entries) as a uleb128. */
u4 dexGetFirstHandlerOffset(const DexCode* pCode) {
if (pCode->triesSize == 0) {
return 0;
}
const u1* baseData = dexGetCatchHandlerData(pCode);
const u1* data = baseData;
readUnsignedLeb128(&data);
return data - baseData;
}
/* Get the handler offset just past the end of the one just iterated over.
* This ends the iteration if it wasn't already. */
u4 dexCatchIteratorGetEndOffset(DexCatchIterator* pIterator,
const DexCode* pCode) {
while (dexCatchIteratorNext(pIterator) != NULL) /* empty */ ;
return (u4) (pIterator->pEncodedData - dexGetCatchHandlerData(pCode));
}
/* Initialize a DexCatchIterator to a particular handler offset. */
DEX_INLINE void dexCatchIteratorInit(DexCatchIterator* pIterator,
const DexCode* pCode, u4 offset)
{
dexCatchIteratorInitToPointer(pIterator,
dexGetCatchHandlerData(pCode) + offset);
}