我创建了两个模块(共享对象)CPU和SaveState作为模拟器的一部分。两者都独立编译成.so文件,并在运行时通过Lua脚本使用require()加载;即:
SaveState = require("SaveState")
CPU = require("CPU")
在CPU中,有一个在SaveState上运行的方法:
int CPU::save_state(SaveState *state) {
state->begin_section(savestate_namespace, savestate_data_size);
state->write16(this->reg.af);
state->write16(this->reg.bc);
state->write16(this->reg.de);
state->write16(this->reg.hl);
state->write16(this->reg.sp);
state->write16(this->reg.pc);
state->write8 (this->interrupts_enabled);
state->write8 (this->irq_flags);
state->write8 (this->ie_flags);
state->write8 (this->halted);
state->write8 (this->halt_bug);
state->write8 (this->extra_cycles);
state->write64(this->total_cycles);
state->write64(this->idle_cycles);
return SaveState::OK;
}
它编译得很好,但require("CPU")
行失败了:
lua5.1: error loading module 'cpu' from file './src/cpu/build/cpu.so':
./src/cpu/build/cpu.so: undefined symbol: _ZN9SaveState7write64Ey
使用nm -D
我可以在savestate.so中看到确切的符号,但在运行时它不会出于某种原因。
答案 0 :(得分:2)
我设法通过编写第三个模块来解决这个问题,该模块在其他两个模块之前加载,并在其luaopen_module方法中调用dlopen():
void *res = dlopen("src/savestate/build/savestate.so",
RTLD_NOW | RTLD_GLOBAL);
我不确定这是最好的解决方案,但它似乎可以解决问题。 (我将不得不将其概括为不使用硬编码路径等等......)