/usr/lib/gcc/x86_64-linux-gnu/6/include/d/rt/dmain2.d is in libgphobos-6-dev 6.4.0-17ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 | /**
* Contains druntime startup and shutdown routines.
*
* Copyright: Copyright Digital Mars 2000 - 2013.
* License: Distributed under the
* $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost Software License 1.0).
* (See accompanying file LICENSE)
* Authors: Walter Bright, Sean Kelly
* Source: $(DRUNTIMESRC src/rt/_dmain2.d)
*/
/* NOTE: This file has been patched from the original DMD distribution to
* work with the GDC compiler.
*/
module rt.dmain2;
private
{
import rt.memory;
import rt.sections;
import rt.util.string;
import core.atomic;
import core.stdc.stddef;
import core.stdc.stdlib;
import core.stdc.string;
import core.stdc.stdio; // for printf()
import core.stdc.errno : errno;
}
version (Windows)
{
private import core.stdc.wchar_;
private import core.sys.windows.windows;
version (GNU) {}
else pragma(lib, "shell32.lib"); // needed for CommandLineToArgvW
}
version (FreeBSD)
{
import core.stdc.fenv;
}
extern (C) void _d_monitor_staticctor();
extern (C) void _d_monitor_staticdtor();
extern (C) void _d_critical_init();
extern (C) void _d_critical_term();
extern (C) void gc_init();
extern (C) void gc_term();
extern (C) void lifetime_init();
extern (C) void rt_moduleCtor();
extern (C) void rt_moduleTlsCtor();
extern (C) void rt_moduleDtor();
extern (C) void rt_moduleTlsDtor();
extern (C) void thread_joinAll();
extern (C) bool runModuleUnitTests();
extern (C) void _d_initMonoTime();
version (OSX)
{
// The bottom of the stack
extern (C) __gshared void* __osx_stack_end = cast(void*)0xC0000000;
}
/***********************************
* These are a temporary means of providing a GC hook for DLL use. They may be
* replaced with some other similar functionality later.
*/
extern (C)
{
void* gc_getProxy();
void gc_setProxy(void* p);
void gc_clrProxy();
alias void* function() gcGetFn;
alias void function(void*) gcSetFn;
alias void function() gcClrFn;
}
version (Windows)
{
/*******************************************
* Loads a DLL written in D with the name 'name'.
* Returns:
* opaque handle to the DLL if successfully loaded
* null if failure
*/
extern (C) void* rt_loadLibrary(const char* name)
{
return initLibrary(.LoadLibraryA(name));
}
extern (C) void* rt_loadLibraryW(const wchar_t* name)
{
return initLibrary(.LoadLibraryW(name));
}
void* initLibrary(void* mod)
{
// BUG: LoadLibrary() call calls rt_init(), which fails if proxy is not set!
// (What? LoadLibrary() is a Windows API call, it shouldn't call rt_init().)
if (mod is null)
return mod;
gcSetFn gcSet = cast(gcSetFn) GetProcAddress(mod, "gc_setProxy");
if (gcSet !is null)
{ // BUG: Set proxy, but too late
gcSet(gc_getProxy());
}
return mod;
}
/*************************************
* Unloads DLL that was previously loaded by rt_loadLibrary().
* Input:
* ptr the handle returned by rt_loadLibrary()
* Returns:
* 1 succeeded
* 0 some failure happened
*/
extern (C) int rt_unloadLibrary(void* ptr)
{
gcClrFn gcClr = cast(gcClrFn) GetProcAddress(ptr, "gc_clrProxy");
if (gcClr !is null)
gcClr();
return FreeLibrary(ptr) != 0;
}
}
/* To get out-of-band access to the args[] passed to main().
*/
__gshared string[] _d_args = null;
extern (C) string[] rt_args()
{
return _d_args;
}
// make arguments passed to main available for being filtered by runtime initializers
extern(C) __gshared char[][] _d_main_args = null;
// This variable is only ever set by a debugger on initialization so it should
// be fine to leave it as __gshared.
extern (C) __gshared bool rt_trapExceptions = true;
alias void delegate(Throwable) ExceptionHandler;
/**
* Keep track of how often rt_init/rt_term were called.
*/
shared size_t _initCount;
/**********************************************
* Initialize druntime.
* If a C program wishes to call D code, and there's no D main(), then it
* must call rt_init() and rt_term().
*/
extern (C) int rt_init()
{
/* @@BUG 11380 @@ Need to synchronize rt_init/rt_term calls for
version (Shared) druntime, because multiple C threads might
initialize different D libraries without knowing about the
shared druntime. Also we need to attach any thread that calls
rt_init. */
if (atomicOp!"+="(_initCount, 1) > 1) return 1;
_d_monitor_staticctor();
_d_critical_init();
try
{
initSections();
// this initializes mono time before anything else to allow usage
// in other druntime systems.
_d_initMonoTime();
gc_init();
initStaticDataGC();
lifetime_init();
rt_moduleCtor();
rt_moduleTlsCtor();
return 1;
}
catch (Throwable t)
{
_initCount = 0;
_d_print_throwable(t);
}
_d_critical_term();
_d_monitor_staticdtor();
return 0;
}
/**********************************************
* Terminate use of druntime.
*/
extern (C) int rt_term()
{
if (!_initCount) return 0; // was never initialized
if (atomicOp!"-="(_initCount, 1)) return 1;
try
{
rt_moduleTlsDtor();
thread_joinAll();
rt_moduleDtor();
gc_term();
finiSections();
return 1;
}
catch (Throwable t)
{
_d_print_throwable(t);
}
finally
{
_d_critical_term();
_d_monitor_staticdtor();
}
return 0;
}
/**********************************************
* Trace handler
*/
alias Throwable.TraceInfo function(void* ptr) TraceHandler;
private __gshared TraceHandler traceHandler = null;
/**
* Overrides the default trace hander with a user-supplied version.
*
* Params:
* h = The new trace handler. Set to null to use the default handler.
*/
extern (C) void rt_setTraceHandler(TraceHandler h)
{
traceHandler = h;
}
/**
* Return the current trace handler
*/
extern (C) TraceHandler rt_getTraceHandler()
{
return traceHandler;
}
/**
* This function will be called when an exception is constructed. The
* user-supplied trace handler will be called if one has been supplied,
* otherwise no trace will be generated.
*
* Params:
* ptr = A pointer to the location from which to generate the trace, or null
* if the trace should be generated from within the trace handler
* itself.
*
* Returns:
* An object describing the current calling context or null if no handler is
* supplied.
*/
extern (C) Throwable.TraceInfo _d_traceContext(void* ptr = null)
{
if (traceHandler is null)
return null;
return traceHandler(ptr);
}
/***********************************
* Provide out-of-band access to the original C argc/argv
* passed to this program via main(argc,argv).
*/
struct CArgs
{
int argc;
char** argv;
}
__gshared CArgs _cArgs;
extern (C) CArgs rt_cArgs()
{
return _cArgs;
}
/***********************************
* Run the given main function.
* Its purpose is to wrap the D main()
* function and catch any unhandled exceptions.
*/
private alias extern(C) int function(char[][] args) MainFunc;
extern (C) int _d_run_main(int argc, char **argv, MainFunc mainFunc)
{
// Remember the original C argc/argv
_cArgs.argc = argc;
_cArgs.argv = argv;
int result;
version (OSX)
{ /* OSX does not provide a way to get at the top of the
* stack, except for the magic value 0xC0000000.
* But as far as the gc is concerned, argv is at the top
* of the main thread's stack, so save the address of that.
*/
__osx_stack_end = cast(void*)&argv;
}
version (FreeBSD) version (D_InlineAsm_X86)
{
/*
* FreeBSD/i386 sets the FPU precision mode to 53 bit double.
* Make it 64 bit extended.
*/
ushort fpucw;
asm
{
fstsw fpucw;
or fpucw, 0b11_00_111111; // 11: use 64 bit extended-precision
// 111111: mask all FP exceptions
fldcw fpucw;
}
}
version (CRuntime_Microsoft)
{
auto fp = __iob_func();
stdin = &fp[0];
stdout = &fp[1];
stderr = &fp[2];
// ensure that sprintf generates only 2 digit exponent when writing floating point values
_set_output_format(_TWO_DIGIT_EXPONENT);
// enable full precision for reals
version(Win64)
asm
{
push RAX;
fstcw word ptr [RSP];
or [RSP], 0b11_00_111111; // 11: use 64 bit extended-precision
// 111111: mask all FP exceptions
fldcw word ptr [RSP];
pop RAX;
}
else version(Win32)
{
asm
{
push EAX;
fstcw word ptr [ESP];
or [ESP], 0b11_00_111111; // 11: use 64 bit extended-precision
// 111111: mask all FP exceptions
fldcw word ptr [ESP];
pop EAX;
}
}
}
version (Windows)
{
/* Because we want args[] to be UTF-8, and Windows doesn't guarantee that,
* we ignore argc/argv and go get the Windows command line again as UTF-16.
* Then, reparse into wargc/wargs, and then use Windows API to convert
* to UTF-8.
*/
const wchar_t* wCommandLine = GetCommandLineW();
immutable size_t wCommandLineLength = wcslen(wCommandLine);
int wargc;
wchar_t** wargs = CommandLineToArgvW(wCommandLine, &wargc);
// assert(wargc == argc); /* argc can be broken by Unicode arguments */
// Allocate args[] on the stack - use wargc
char[][] args = (cast(char[]*) alloca(wargc * (char[]).sizeof))[0 .. wargc];
// This is required because WideCharToMultiByte requires int as input.
assert(wCommandLineLength <= cast(size_t) int.max, "Wide char command line length must not exceed int.max");
immutable size_t totalArgsLength = WideCharToMultiByte(CP_UTF8, 0, wCommandLine, cast(int)wCommandLineLength, null, 0, null, null);
{
char* totalArgsBuff = cast(char*) alloca(totalArgsLength);
size_t j = 0;
foreach (i; 0 .. wargc)
{
immutable size_t wlen = wcslen(wargs[i]);
assert(wlen <= cast(size_t) int.max, "wlen cannot exceed int.max");
immutable int len = WideCharToMultiByte(CP_UTF8, 0, &wargs[i][0], cast(int) wlen, null, 0, null, null);
args[i] = totalArgsBuff[j .. j + len];
if (len == 0)
continue;
j += len;
assert(j <= totalArgsLength);
WideCharToMultiByte(CP_UTF8, 0, &wargs[i][0], cast(int) wlen, &args[i][0], len, null, null);
}
}
LocalFree(wargs);
wargs = null;
wargc = 0;
}
else version (Posix)
{
// Allocate args[] on the stack
char[][] args = (cast(char[]*) alloca(argc * (char[]).sizeof))[0 .. argc];
size_t totalArgsLength = 0;
foreach(i, ref arg; args)
{
arg = argv[i][0 .. strlen(argv[i])];
totalArgsLength += arg.length;
}
}
else
static assert(0);
/* Create a copy of args[] on the stack to be used for main, so that rt_args()
* cannot be modified by the user.
* Note that when this function returns, _d_args will refer to garbage.
*/
{
_d_args = cast(string[]) args;
auto buff = cast(char[]*) alloca(args.length * (char[]).sizeof + totalArgsLength);
char[][] argsCopy = buff[0 .. args.length];
auto argBuff = cast(char*) (buff + args.length);
size_t j = 0;
foreach(arg; args)
{
if (arg.length < 6 || arg[0..6] != "--DRT-") // skip D runtime options
{
argsCopy[j++] = (argBuff[0 .. arg.length] = arg[]);
argBuff += arg.length;
}
}
args = argsCopy[0..j];
}
bool trapExceptions = rt_trapExceptions;
version (Windows)
{
if (IsDebuggerPresent())
trapExceptions = false;
version (GNU)
{
/* IsDebuggerPresent doesn't detect GDC. Would be nice to have
some way of detecting valid console output */
trapExceptions = true;
}
}
void tryExec(scope void delegate() dg)
{
if (trapExceptions)
{
try
{
dg();
}
catch (Throwable t)
{
_d_print_throwable(t);
result = EXIT_FAILURE;
}
}
else
{
dg();
}
}
// NOTE: The lifetime of a process is much like the lifetime of an object:
// it is initialized, then used, then destroyed. If initialization
// fails, the successive two steps are never reached. However, if
// initialization succeeds, then cleanup will occur even if the use
// step fails in some way. Here, the use phase consists of running
// the user's main function. If main terminates with an exception,
// the exception is handled and then cleanup begins. An exception
// thrown during cleanup, however, will abort the cleanup process.
void runAll()
{
if (rt_init() && runModuleUnitTests())
tryExec({ result = mainFunc(args); });
else
result = EXIT_FAILURE;
if (!rt_term())
result = (result == EXIT_SUCCESS) ? EXIT_FAILURE : result;
}
tryExec(&runAll);
// Issue 10344: flush stdout and return nonzero on failure
if (.fflush(.stdout) != 0)
{
.fprintf(.stderr, "Failed to flush stdout: %s\n", .strerror(.errno));
if (result == 0)
{
result = EXIT_FAILURE;
}
}
return result;
}
private void formatThrowable(Throwable t, void delegate(in char[] s) nothrow sink)
{
for (; t; t = t.next)
{
t.toString(sink); sink("\n");
auto e = cast(Error)t;
if (e is null || e.bypassedException is null) continue;
sink("=== Bypassed ===\n");
for (auto t2 = e.bypassedException; t2; t2 = t2.next)
{
t2.toString(sink); sink("\n");
}
sink("=== ~Bypassed ===\n");
}
}
extern (C) void _d_print_throwable(Throwable t)
{
// On Windows, a console may not be present to print the output to.
// Show a message box instead.
version (Windows)
{
if (!GetConsoleWindow())
{
static struct WSink
{
wchar_t* ptr; size_t len;
void sink(in char[] s) nothrow
{
if (!s.length) return;
int swlen = MultiByteToWideChar(
CP_UTF8, 0, s.ptr, cast(int)s.length, null, 0);
if (!swlen) return;
auto newPtr = cast(wchar_t*)realloc(ptr,
(this.len + swlen + 1) * wchar_t.sizeof);
if (!newPtr) return;
ptr = newPtr;
auto written = MultiByteToWideChar(
CP_UTF8, 0, s.ptr, cast(int)s.length, ptr+len, swlen);
len += written;
}
wchar_t* get() { if (ptr) ptr[len] = 0; return ptr; }
void free() { .free(ptr); }
}
WSink buf;
formatThrowable(t, &buf.sink);
if (buf.ptr)
{
WSink caption;
if (t)
caption.sink(t.classinfo.name);
// Avoid static user32.dll dependency for console applications
// by loading it dynamically as needed
auto user32 = LoadLibraryW("user32.dll");
if (user32)
{
alias typeof(&MessageBoxW) PMessageBoxW;
auto pMessageBoxW = cast(PMessageBoxW)
GetProcAddress(user32, "MessageBoxW");
if (pMessageBoxW)
pMessageBoxW(null, buf.get(), caption.get(), MB_ICONERROR);
}
FreeLibrary(user32);
caption.free();
buf.free();
}
return;
}
}
void sink(in char[] buf) nothrow
{
fprintf(stderr, "%.*s", cast(int)buf.length, buf.ptr);
}
formatThrowable(t, &sink);
}
|