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// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "video_core/vulkan_common/vulkan_wrapper.h"
#ifdef _WIN32
#include <cstring> // for memset, strncpy
#include <processthreadsapi.h>
#include <windows.h>
#elif defined(YUZU_UNIX)
#include <errno.h>
#include <sys/wait.h>
#include <unistd.h>
#endif
#include <cstdio>
#include "video_core/vulkan_common/vulkan_instance.h"
#include "video_core/vulkan_common/vulkan_library.h"
#include "yuzu/startup_checks.h"
void CheckVulkan() {
// Just start the Vulkan loader, this will crash if something is wrong
try {
Vulkan::vk::InstanceDispatch dld;
const Common::DynamicLibrary library = Vulkan::OpenLibrary();
const Vulkan::vk::Instance instance =
Vulkan::CreateInstance(library, dld, VK_API_VERSION_1_0);
} catch (const Vulkan::vk::Exception& exception) {
std::fprintf(stderr, "Failed to initialize Vulkan: %s\n", exception.what());
}
}
bool CheckEnvVars(bool* is_child) {
#ifdef _WIN32
// Check environment variable to see if we are the child
char variable_contents[8];
const DWORD startup_check_var =
GetEnvironmentVariableA(STARTUP_CHECK_ENV_VAR, variable_contents, 8);
if (startup_check_var > 0 && std::strncmp(variable_contents, ENV_VAR_ENABLED_TEXT, 8) == 0) {
CheckVulkan();
return true;
}
// Don't perform startup checks if we are a child process
char is_child_s[8];
const DWORD is_child_len = GetEnvironmentVariableA(IS_CHILD_ENV_VAR, is_child_s, 8);
if (is_child_len > 0 && std::strncmp(is_child_s, ENV_VAR_ENABLED_TEXT, 8) == 0) {
*is_child = true;
return false;
} else if (!SetEnvironmentVariableA(IS_CHILD_ENV_VAR, ENV_VAR_ENABLED_TEXT)) {
std::fprintf(stderr, "SetEnvironmentVariableA failed to set %s with error %d\n",
IS_CHILD_ENV_VAR, GetLastError());
return true;
}
#endif
return false;
}
bool StartupChecks(const char* arg0, bool* has_broken_vulkan) {
#ifdef _WIN32
// Set the startup variable for child processes
const bool env_var_set = SetEnvironmentVariableA(STARTUP_CHECK_ENV_VAR, ENV_VAR_ENABLED_TEXT);
if (!env_var_set) {
std::fprintf(stderr, "SetEnvironmentVariableA failed to set %s with error %d\n",
STARTUP_CHECK_ENV_VAR, GetLastError());
return false;
}
PROCESS_INFORMATION process_info;
std::memset(&process_info, '\0', sizeof(process_info));
if (!SpawnChild(arg0, &process_info, 0)) {
return false;
}
// Wait until the processs exits and get exit code from it
WaitForSingleObject(process_info.hProcess, INFINITE);
DWORD exit_code = STILL_ACTIVE;
const int err = GetExitCodeProcess(process_info.hProcess, &exit_code);
if (err == 0) {
std::fprintf(stderr, "GetExitCodeProcess failed with error %d\n", GetLastError());
}
// Vulkan is broken if the child crashed (return value is not zero)
*has_broken_vulkan = (exit_code != 0);
if (CloseHandle(process_info.hProcess) == 0) {
std::fprintf(stderr, "CloseHandle failed with error %d\n", GetLastError());
}
if (CloseHandle(process_info.hThread) == 0) {
std::fprintf(stderr, "CloseHandle failed with error %d\n", GetLastError());
}
if (!SetEnvironmentVariableA(STARTUP_CHECK_ENV_VAR, nullptr)) {
std::fprintf(stderr, "SetEnvironmentVariableA failed to clear %s with error %d\n",
STARTUP_CHECK_ENV_VAR, GetLastError());
}
#elif defined(YUZU_UNIX)
const pid_t pid = fork();
if (pid == 0) {
CheckVulkan();
return true;
} else if (pid == -1) {
const int err = errno;
std::fprintf(stderr, "fork failed with error %d\n", err);
return false;
}
// Get exit code from child process
int status;
const int r_val = wait(&status);
if (r_val == -1) {
const int err = errno;
std::fprintf(stderr, "wait failed with error %d\n", err);
return false;
}
// Vulkan is broken if the child crashed (return value is not zero)
*has_broken_vulkan = (status != 0);
#endif
return false;
}
#ifdef _WIN32
bool SpawnChild(const char* arg0, PROCESS_INFORMATION* pi, int flags) {
STARTUPINFOA startup_info;
std::memset(&startup_info, '\0', sizeof(startup_info));
startup_info.cb = sizeof(startup_info);
char p_name[255];
std::strncpy(p_name, arg0, 255);
const bool process_created = CreateProcessA(nullptr, // lpApplicationName
p_name, // lpCommandLine
nullptr, // lpProcessAttributes
nullptr, // lpThreadAttributes
false, // bInheritHandles
flags, // dwCreationFlags
nullptr, // lpEnvironment
nullptr, // lpCurrentDirectory
&startup_info, // lpStartupInfo
pi // lpProcessInformation
);
if (!process_created) {
std::fprintf(stderr, "CreateProcessA failed with error %d\n", GetLastError());
return false;
}
return true;
}
#endif
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