chromium/third_party/dawn/src/dawn/native/vulkan/VulkanFunctions.cpp

// Copyright 2017 The Dawn & Tint Authors
//
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// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
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#include "dawn/native/vulkan/VulkanFunctions.h"

#include <string>
#include <utility>

#include "dawn/common/DynamicLib.h"
#include "dawn/native/vulkan/VulkanInfo.h"

namespace dawn::native::vulkan {

namespace {

#if DAWN_NO_SANITIZE_VK_FN

template <typename F>
struct AsVkNoSanitizeFn;

// SwiftShader does not export function pointer type information.
// So, when fuzzing with UBSAN, fuzzers break whenever calling
// a vk* function since it thinks the type of the function pointer
// does not match. Context: crbug.com/1296934.

// Workaround this problem by proxying through a std::function
// in UBSAN builds. The std::function delegates to a Call method
// which does the same cast of the function pointer type, however
// the Call method is tagged with
// `__attribute__((no_sanitize("function")))` to silence the error.
template <typename R, typename... Args>
struct AsVkNoSanitizeFn<R(VKAPI_PTR*)(Args...)> {
    auto operator()(void(VKAPI_PTR* addr)()) {
        return [addr](Args&&... args) -> R { return Call(addr, std::forward<Args>(args)...); };
    }

  private:
    __attribute__((no_sanitize("function"))) static R Call(void(VKAPI_PTR* addr)(),
                                                           Args&&... args) {
        return reinterpret_cast<R(VKAPI_PTR*)(Args...)>(addr)(std::forward<Args>(args)...);
    }
};
template <typename F>
auto AsVkFn(void(VKAPI_PTR* addr)()) {
    return AsVkNoSanitizeFn<F>{}(addr);
}

#else

template <typename F>
F AsVkFn(void(VKAPI_PTR* addr)()) { … }

#endif

}  // anonymous namespace

#define GET_GLOBAL_PROC(name) …

MaybeError VulkanFunctions::LoadGlobalProcs(const DynamicLib& vulkanLib) { … }

#define GET_INSTANCE_PROC_BASE(name, procName) …

#define GET_INSTANCE_PROC(name) …
#define GET_INSTANCE_PROC_VENDOR(name, vendor) …

MaybeError VulkanFunctions::LoadInstanceProcs(VkInstance instance,
                                              const VulkanGlobalInfo& globalInfo) { … }

#define GET_DEVICE_PROC(name) …

MaybeError VulkanFunctions::LoadDeviceProcs(VkDevice device, const VulkanDeviceInfo& deviceInfo) { … }

}  // namespace dawn::native::vulkan