Function InstallHandler

engine/crash/src/backtrace_android.cpp:244–294

    }

    void InstallHandler()
    {
        // Somewhat hacky to do this here, but this is a nice platform specific file and saves adding
        // additional layers of platform initialization.
        char fp[PROP_VALUE_MAX];
        __system_property_get("ro.build.fingerprint", fp);
        dmStrlCpy(g_AppState.m_AndroidBuildFingerprint, fp, sizeof(g_AppState.m_AndroidBuildFingerprint));

        void *lib = dlopen("libunwind.so", RTLD_LAZY | RTLD_LOCAL);
        if (lib)
        {
            // The libunwind usage here is quite a bit of hackery and assumptions
            // made by peering at the source code and generated dynamic libraries.
            unw_init_local = (unw_init_local_t) dlsym(lib, "_Uarm_init_local");
            unw_step = (unw_step_t) dlsym(lib, "_Uarm_step");
            unw_get_reg = (unw_get_reg_t) dlsym(lib, "_Uarm_get_reg");

            // clear handler if not complete.
            if (!unw_step || !unw_get_reg)
            {
                unw_init_local = 0;
            }
        }
        else
        {
            lib = dlopen("libcorkscrew.so", RTLD_LAZY | RTLD_LOCAL);
            if (lib)
            {
                acquire_my_map_info_list = (acquire_my_map_info_list_fn) dlsym(lib, "acquire_my_map_info_list");
                release_my_map_info_list = (release_my_map_info_list_fn) dlsym(lib, "release_my_map_info_list");
                unwind_backtrace_signal_arch = (unwind_backtrace_signal_arch_fn) dlsym(lib, "unwind_backtrace_signal_arch");

                if (!acquire_my_map_info_list || !release_my_map_info_list)
                {
                    unwind_backtrace_signal_arch = 0;
                }
            }
        }

        stack_t stack;
        memset(&stack, 0, sizeof(stack));
        stack.ss_size = SIGSTKSZ;
        stack.ss_sp = malloc(stack.ss_size);
        stack.ss_flags = 0;
        sigaltstack(&stack, NULL);

        InstallOnSignal(SIGSEGV);
        InstallOnSignal(SIGBUS);
        InstallOnSignal(SIGTRAP);
        InstallOnSignal(SIGILL);
    }
}