68ecec1965
Third try. Bug: 34752378 Test: bionic tests Change-Id: I247c127489a8ee38404e104f28d916a704e35f36
84 lines
2.4 KiB
C++
84 lines
2.4 KiB
C++
/*
|
|
* Copyright (C) 2017 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#include <assert.h>
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
|
|
// This library is built for all targets, including host tests, so __cfi_slowpath may not be
|
|
// present. But it is only used in the bionic loader tests.
|
|
extern "C" __attribute__((weak)) void __cfi_slowpath(uint64_t, void*);
|
|
|
|
static int g_count;
|
|
static uint64_t g_last_type_id;
|
|
static void* g_last_address;
|
|
static void* g_last_diag;
|
|
|
|
extern "C" {
|
|
|
|
// Mock a CFI-enabled library without relying on the compiler.
|
|
__attribute__((aligned(4096))) void __cfi_check(uint64_t CallSiteTypeId, void* TargetAddr,
|
|
void* Diag) {
|
|
++g_count;
|
|
g_last_type_id = CallSiteTypeId;
|
|
g_last_address = TargetAddr;
|
|
g_last_diag = Diag;
|
|
}
|
|
|
|
int get_count() {
|
|
return g_count;
|
|
}
|
|
|
|
uint64_t get_last_type_id() {
|
|
return g_last_type_id;
|
|
}
|
|
|
|
void* get_last_address() {
|
|
return g_last_address;
|
|
}
|
|
|
|
void* get_last_diag() {
|
|
return g_last_diag;
|
|
}
|
|
|
|
void* get_global_address() {
|
|
return &g_count;
|
|
}
|
|
}
|
|
|
|
// Check that CFI is set up in module constructors and destructors.
|
|
struct A {
|
|
void check_cfi_self() {
|
|
g_last_type_id = 0;
|
|
assert(&__cfi_slowpath);
|
|
// CFI check for an invalid address. Normally, this would kill the process by routing the call
|
|
// back to the calling module's __cfi_check, which does the right thing based on
|
|
// -fsanitize-recover / -fsanitize-trap. But this module has custom __cfi_check that does not do
|
|
// any of that, so the result looks like a passing check.
|
|
int zz;
|
|
__cfi_slowpath(13, static_cast<void*>(&zz));
|
|
assert(g_last_type_id == 13);
|
|
// CFI check for a libc function. This never goes into this module's __cfi_check, and must pass.
|
|
__cfi_slowpath(14, reinterpret_cast<void*>(&exit));
|
|
assert(g_last_type_id == 13);
|
|
}
|
|
A() {
|
|
check_cfi_self();
|
|
}
|
|
~A() {
|
|
check_cfi_self();
|
|
}
|
|
} a;
|