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Fix exceptions on android 32 maybe 64?

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This commit is contained in:
altalk23 2024-01-23 01:39:41 +03:00
parent 8473e5d9a3
commit 9c87d4c8dd
1 changed files with 28 additions and 0 deletions

28
loader/src/hooks/AndroidExceptionFix.cpp Normal file
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#include <Geode/Geode.hpp>
using namespace geode::prelude;
#ifdef GEODE_IS_ANDROID
// replaces https://github.com/llvm-mirror/libcxxabi/blob/master/src/private_typeinfo.cpp#L213
// this is the function that checks if a type can catch an exception
bool canCatchImpl(const std::type_info* self, const std::type_info* thrown, void*& adjustedPtr) {
auto vtable = reinterpret_cast<geode::cast::VtableType*>(*(intptr_t*)adjustedPtr);
auto complete = static_cast<geode::cast::CompleteVtableType*>(vtable);
auto typeinfo = complete->m_typeinfo;
return traverseTypeinfoFor(adjustedPtr, typeinfo, self->name());
}
$execute {
// we get the __class_type_info::can_catch address from the typeinfo of a dummy class
geode::cast::DummyClass dummyClass;
auto vtable = reinterpret_cast<geode::cast::VtableType*>(*(intptr_t*)&dummyClass);
auto complete = static_cast<geode::cast::CompleteVtableType*>(vtable);
auto typeinfo = complete->m_typeinfo;
auto tiVtable = typeinfo->m_typeinfoVtable;
auto hookAddr = tiVtable->m_vtable[4]; // 5th entry is can_catch
(void)Mod::get()->hook(hookAddr, &canCatchImpl, "__class_type_info::can_catch");
}
#endif