void exclude_referenced_bridgee(DexMethod* code_method, const DexCode& code) {
auto const& insts = code.get_instructions();
for (auto inst : insts) {
if (!is_invoke(inst->opcode())) continue;
auto method = static_cast<DexOpcodeMethod*>(inst)->get_method();
auto range = m_potential_bridgee_refs.equal_range(
MethodRef(method->get_class(), method->get_name(),
method->get_proto()));
for (auto it = range.first; it != range.second; ++it) {
auto referenced_bridge = it->second;
// Don't count the bridge itself
if (referenced_bridge == code_method) continue;
TRACE(BRIDGE,
5,
"Rejecting, reference `%s.%s.%s' in `%s' blocks `%s'\n",
SHOW(method->get_class()),
SHOW(method->get_name()),
SHOW(method->get_proto()),
SHOW(code_method),
SHOW(referenced_bridge));
m_bridges_to_bridgees.erase(referenced_bridge);
}
}
}
void exclude_referenced_bridgee(DexMethod* code_method, IRCode& code) {
for (auto& mie : InstructionIterable(&code)) {
auto inst = mie.insn;
if (!is_invoke(inst->opcode())) continue;
auto method = inst->get_method();
auto range = m_potential_bridgee_refs.equal_range(
MethodRef(method->get_class(), method->get_name(),
method->get_proto()));
for (auto it = range.first; it != range.second; ++it) {
auto referenced_bridge = it->second;
// Don't count the bridge itself
if (referenced_bridge == code_method) continue;
TRACE(BRIDGE,
5,
"Rejecting, reference `%s.%s.%s' in `%s' blocks `%s'\n",
SHOW(method->get_class()),
SHOW(method->get_name()),
SHOW(method->get_proto()),
SHOW(code_method),
SHOW(referenced_bridge));
m_bridges_to_bridgees.erase(referenced_bridge);
}
}
}
void search_hierarchy_for_matches(DexMethod* bridge, DexMethod* bridgee) {
/*
* Direct reference. The only one if it's non-virtual.
*/
auto clstype = bridgee->get_class();
auto name = bridgee->get_name();
auto proto = bridgee->get_proto();
TRACE(BRIDGE, 5, " %s %s %s\n", SHOW(clstype), SHOW(name), SHOW(proto));
m_potential_bridgee_refs.emplace(MethodRef(clstype, name, proto), bridge);
if (!bridgee->is_virtual()) return;
/*
* Search super classes
*
* A bridge method in a derived class may be referred to using the name
* of a super class if a method with a matching signature is defined in
* that super class.
*
* To build the set of potential matches, we accumulate potential refs in
* maybe_refs, and when we find a matching signature in a super class, we
* add everything in maybe_refs to the set.
*/
std::vector<std::pair<MethodRef, DexMethod*>> maybe_refs;
for (auto super = type_class(type_class(clstype)->get_super_class());
super != nullptr;
super = type_class(super->get_super_class())) {
maybe_refs.emplace_back(
MethodRef(super->get_type(), name, proto), bridge);
for (auto vmethod : super->get_vmethods()) {
if (signature_matches(bridgee, vmethod)) {
for (auto DEBUG_ONLY refp : maybe_refs) {
TRACE(BRIDGE,
5,
" %s %s %s\n",
SHOW(std::get<0>(refp.first)),
SHOW(std::get<1>(refp.first)),
SHOW(std::get<2>(refp.first)));
}
m_potential_bridgee_refs.insert(maybe_refs.begin(), maybe_refs.end());
maybe_refs.clear();
}
}
}
/*
* Search sub classes
*
* Easy. Any subclass can refer to the bridgee.
*/
TypeVector subclasses;
get_all_children(clstype, subclasses);
for (auto subclass : subclasses) {
m_potential_bridgee_refs.emplace(MethodRef(subclass, name, proto),
bridge);
TRACE(BRIDGE,
5,
" %s %s %s\n",
SHOW(subclass),
SHOW(name),
SHOW(proto));
}
}