138 lines
4.2 KiB
C++
138 lines
4.2 KiB
C++
/**
|
|
* Main entry point into the Rust runtime. Here we initialize the kernel,
|
|
* create the initial scheduler and run the main task.
|
|
*/
|
|
|
|
#include "rust_globals.h"
|
|
#include "rust_kernel.h"
|
|
#include "rust_util.h"
|
|
#include "rust_scheduler.h"
|
|
|
|
// Creates a rust argument vector from the platform argument vector
|
|
struct
|
|
command_line_args : public kernel_owned<command_line_args>
|
|
{
|
|
rust_kernel *kernel;
|
|
rust_task *task;
|
|
int argc;
|
|
char **argv;
|
|
|
|
// [str] passed to rust_task::start.
|
|
rust_vec_box *args;
|
|
|
|
command_line_args(rust_task *task,
|
|
int sys_argc,
|
|
char **sys_argv)
|
|
: kernel(task->kernel),
|
|
task(task),
|
|
argc(sys_argc),
|
|
argv(sys_argv)
|
|
{
|
|
#if defined(__WIN32__)
|
|
LPCWSTR cmdline = GetCommandLineW();
|
|
LPWSTR *wargv = CommandLineToArgvW(cmdline, &argc);
|
|
kernel->win32_require("CommandLineToArgvW", wargv != NULL);
|
|
argv = (char **) kernel->malloc(sizeof(char*) * argc,
|
|
"win32 command line");
|
|
for (int i = 0; i < argc; ++i) {
|
|
int n_chars = WideCharToMultiByte(CP_UTF8, 0, wargv[i], -1,
|
|
NULL, 0, NULL, NULL);
|
|
kernel->win32_require("WideCharToMultiByte(0)", n_chars != 0);
|
|
argv[i] = (char *) kernel->malloc(n_chars,
|
|
"win32 command line arg");
|
|
n_chars = WideCharToMultiByte(CP_UTF8, 0, wargv[i], -1,
|
|
argv[i], n_chars, NULL, NULL);
|
|
kernel->win32_require("WideCharToMultiByte(1)", n_chars != 0);
|
|
}
|
|
LocalFree(wargv);
|
|
#endif
|
|
|
|
args = make_str_vec(kernel, argc, argv);
|
|
}
|
|
|
|
~command_line_args() {
|
|
for (int i = 0; i < argc; ++i) {
|
|
rust_vec *s = ((rust_vec**)&args->body.data)[i];
|
|
kernel->free(s);
|
|
}
|
|
kernel->free(args);
|
|
|
|
#ifdef __WIN32__
|
|
for (int i = 0; i < argc; ++i) {
|
|
kernel->free(argv[i]);
|
|
}
|
|
kernel->free(argv);
|
|
#endif
|
|
}
|
|
};
|
|
|
|
// A global that indicates whether Rust typestate claim statements should be
|
|
// executed Generated code will read this variable directly (I think).
|
|
// FIXME (#2670): This belongs somewhere else
|
|
int check_claims = 0;
|
|
|
|
/**
|
|
The runtime entrypoint. The (C ABI) main function generated by rustc calls
|
|
`rust_start`, providing the address of the Rust ABI main function, the
|
|
platform argument vector, and a `crate_map` the provides some logging
|
|
metadata.
|
|
*/
|
|
extern "C" CDECL int
|
|
rust_start(uintptr_t main_fn, int argc, char **argv, void* crate_map) {
|
|
|
|
// Load runtime configuration options from the environment.
|
|
// FIXME #1497: Should provide a way to get these from the command
|
|
// line as well.
|
|
rust_env *env = load_env();
|
|
|
|
update_log_settings(crate_map, env->logspec);
|
|
|
|
// Maybe turn on typestate claim checking
|
|
check_claims = env->check_claims;
|
|
|
|
rust_kernel *kernel = new rust_kernel(env);
|
|
|
|
// Create the main scheduler and the main task
|
|
rust_sched_id sched_id = kernel->create_scheduler(env->num_sched_threads);
|
|
rust_scheduler *sched = kernel->get_scheduler_by_id(sched_id);
|
|
assert(sched != NULL);
|
|
rust_task *root_task = sched->create_task(NULL, "main");
|
|
|
|
// Build the command line arguments to pass to the root task
|
|
command_line_args *args
|
|
= new (kernel, "main command line args")
|
|
command_line_args(root_task, argc, argv);
|
|
|
|
LOG(root_task, dom, "startup: %d args in 0x%" PRIxPTR,
|
|
args->argc, (uintptr_t)args->args);
|
|
for (int i = 0; i < args->argc; i++) {
|
|
LOG(root_task, dom, "startup: arg[%d] = '%s'", i, args->argv[i]);
|
|
}
|
|
|
|
// Schedule the main Rust task
|
|
root_task->start((spawn_fn)main_fn, NULL, args->args);
|
|
|
|
// At this point the task lifecycle is responsible for it
|
|
// and our pointer may not be valid
|
|
root_task = NULL;
|
|
|
|
// Run the kernel until all schedulers exit
|
|
int ret = kernel->run();
|
|
|
|
delete args;
|
|
delete kernel;
|
|
free_env(env);
|
|
|
|
return ret;
|
|
}
|
|
|
|
//
|
|
// Local Variables:
|
|
// mode: C++
|
|
// fill-column: 78;
|
|
// indent-tabs-mode: nil
|
|
// c-basic-offset: 4
|
|
// buffer-file-coding-system: utf-8-unix
|
|
// End:
|
|
//
|