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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef SANDBOX_LINUX_SECCOMP_BPF_BPF_TESTER_COMPATIBILITY_DELEGATE_H_
#define SANDBOX_LINUX_SECCOMP_BPF_BPF_TESTER_COMPATIBILITY_DELEGATE_H_
#include <memory>
#include "base/macros.h"
#include "sandbox/linux/seccomp-bpf/sandbox_bpf_test_runner.h"
namespace sandbox {
// This templated class allows building a BPFTesterDelegate from a
// deprecated-style BPF policy (that is a SyscallEvaluator function pointer,
// instead of a SandboxBPFPolicy class), specified in |policy_function| and a
// function pointer to a test in |test_function|.
// This allows both the policy and the test function to take a pointer to an
// object of type "Aux" as a parameter. This is used to implement the BPF_TEST
// macro and should generally not be used directly.
template <class Policy, class Aux>
class BPFTesterCompatibilityDelegate : public BPFTesterDelegate {
public:
typedef void (*TestFunction)(Aux*);
explicit BPFTesterCompatibilityDelegate(TestFunction test_function)
: aux_(), test_function_(test_function) {}
~BPFTesterCompatibilityDelegate() override {}
std::unique_ptr<bpf_dsl::Policy> GetSandboxBPFPolicy() override {
// The current method is guaranteed to only run in the child process
// running the test. In this process, the current object is guaranteed
// to live forever. So it's ok to pass aux_pointer_for_policy_ to
// the policy, which could in turn pass it to the kernel via Trap().
return std::unique_ptr<bpf_dsl::Policy>(new Policy(&aux_));
}
void RunTestFunction() override {
// Run the actual test.
// The current object is guaranteed to live forever in the child process
// where this will run.
test_function_(&aux_);
}
private:
Aux aux_;
TestFunction test_function_;
DISALLOW_COPY_AND_ASSIGN(BPFTesterCompatibilityDelegate);
};
} // namespace sandbox
#endif // SANDBOX_LINUX_SECCOMP_BPF_BPF_TESTER_COMPATIBILITY_DELEGATE_H_
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