private static HookPage handleHookPage(ArtMethod original, ArtMethod replacement) {
long originalEntryPoint =
INSTRUCTION_SET_HELPER.toMem(original.getEntryPointFromQuickCompiledCode());
if (!pages.containsKey(originalEntryPoint)) {
pages.put(
originalEntryPoint,
new HookPage(
INSTRUCTION_SET_HELPER, originalEntryPoint, getQuickCompiledCodeSize(original)));
}
HookPage page = pages.get(originalEntryPoint);
page.addHook(new HookPage.Hook(original, replacement));
page.update();
return page;
}
private static int getQuickCompiledCodeSize(ArtMethod method) {
long entryPoint = INSTRUCTION_SET_HELPER.toMem(method.getEntryPointFromQuickCompiledCode());
long sizeInfo1 = entryPoint - 4;
byte[] bytes = Memory.get(sizeInfo1, 4);
return ByteBuffer.wrap(bytes).order(ByteOrder.LITTLE_ENDIAN).getInt();
}
