godot/platform/linuxbsd/godot_linuxbsd.cpp

/**************************************************************************/
/*  godot_linuxbsd.cpp                                                    */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
/*                        https://godotengine.org                         */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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/* without limitation the rights to use, copy, modify, merge, publish,    */
/* distribute, sublicense, and/or sell copies of the Software, and to     */
/* permit persons to whom the Software is furnished to do so, subject to  */
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/* included in all copies or substantial portions of the Software.        */
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/**************************************************************************/

#include "os_linuxbsd.h"

#include "main/main.h"

#include <limits.h>
#include <locale.h>
#include <stdlib.h>
#include <unistd.h>

#if defined(SANITIZERS_ENABLED)
#include <sys/resource.h>
#endif

// For export templates, add a section; the exporter will patch it to enclose
// the data appended to the executable (bundled PCK).
#if !defined(TOOLS_ENABLED) && defined(__GNUC__)
static const char dummy[8] __attribute__((section("pck"), used)) = { 0 };

// Dummy function to prevent LTO from discarding "pck" section.
extern "C" const char *pck_section_dummy_call() __attribute__((used));
extern "C" const char *pck_section_dummy_call() {
	return &dummy[0];
}
#endif

int main(int argc, char *argv[]) {
#if defined(SANITIZERS_ENABLED)
	// Note: Set stack size to be at least 30 MB (vs 8 MB default) to avoid overflow, address sanitizer can increase stack usage up to 3 times.
	struct rlimit stack_lim = { 0x1E00000, 0x1E00000 };
	setrlimit(RLIMIT_STACK, &stack_lim);
#endif

	OS_LinuxBSD os;

	setlocale(LC_CTYPE, "");

	// We must override main when testing is enabled
	TEST_MAIN_OVERRIDE

	char *cwd = (char *)malloc(PATH_MAX);
	ERR_FAIL_NULL_V(cwd, ERR_OUT_OF_MEMORY);
	char *ret = getcwd(cwd, PATH_MAX);

	Error err = Main::setup(argv[0], argc - 1, &argv[1]);
	if (err != OK) {
		free(cwd);

		if (err == ERR_HELP) { // Returned by --help and --version, so success.
			return 0;
		}
		return 255;
	}

	if (Main::start()) {
		os.set_exit_code(EXIT_SUCCESS);
		os.run(); // it is actually the OS that decides how to run
	}
	Main::cleanup();

	if (ret) { // Previous getcwd was successful
		if (chdir(cwd) != 0) {
			ERR_PRINT("Couldn't return to previous working directory.");
		}
	}
	free(cwd);

	return os.get_exit_code();
}