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mars.d
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mars.d
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/**
* Compiler implementation of the
* $(LINK2 http://www.dlang.org, D programming language).
* Entry point for DMD.
*
* This modules defines the entry point (main) for DMD, as well as related
* utilities needed for arguments parsing, path manipulation, etc...
* This file is not shared with other compilers which use the DMD front-end.
*
* Copyright: Copyright (C) 1999-2019 by The D Language Foundation, All Rights Reserved
* Authors: $(LINK2 http://www.digitalmars.com, Walter Bright)
* License: $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost License 1.0)
* Source: $(LINK2 https://github.com/dlang/dmd/blob/master/src/dmd/mars.d, _mars.d)
* Documentation: https://dlang.org/phobos/dmd_mars.html
* Coverage: https://codecov.io/gh/dlang/dmd/src/master/src/dmd/mars.d
*/
module dmd.mars;
import core.stdc.ctype;
import core.stdc.limits;
import core.stdc.stdio;
import core.stdc.stdlib;
import core.stdc.string;
import dmd.arraytypes;
import dmd.gluelayer;
import dmd.builtin;
import dmd.cond;
import dmd.console;
import dmd.compiler;
import dmd.dinifile;
import dmd.dinterpret;
import dmd.dmodule;
import dmd.doc;
import dmd.dsymbol;
import dmd.dsymbolsem;
import dmd.errors;
import dmd.expression;
import dmd.globals;
import dmd.hdrgen;
import dmd.id;
import dmd.identifier;
import dmd.inline;
import dmd.json;
import dmd.lib;
import dmd.link;
import dmd.mtype;
import dmd.objc;
import dmd.root.array;
import dmd.root.file;
import dmd.root.filename;
import dmd.root.man;
import dmd.root.outbuffer;
import dmd.root.response;
import dmd.root.rmem;
import dmd.root.stringtable;
import dmd.semantic2;
import dmd.semantic3;
import dmd.target;
import dmd.utils;
/**
* Print DMD's logo on stdout
*/
private void logo()
{
printf("DMD%llu D Compiler %s\n%s %s\n", cast(ulong)size_t.sizeof * 8, global._version, global.copyright, global.written);
}
/**
Print DMD's logo with more debug information and error-reporting pointers.
Params:
stream = output stream to print the information on
*/
extern(C) void printInternalFailure(FILE* stream)
{
fputs(("---\n" ~
"ERROR: This is a compiler bug.\n" ~
"Please report it via https://issues.dlang.org/enter_bug.cgi\n" ~
"with, preferably, a reduced, reproducible example and the information below.\n" ~
"DustMite (https://github.com/CyberShadow/DustMite/wiki) can help with the reduction.\n" ~
"---\n").ptr, stream);
stream.fprintf("DMD %s\n", global._version);
stream.printPredefinedVersions;
stream.printGlobalConfigs();
fputs("---\n".ptr, stream);
}
/**
* Print DMD's usage message on stdout
*/
private void usage()
{
import dmd.cli : CLIUsage;
logo();
auto help = CLIUsage.usage;
printf("
Documentation: https://dlang.org/
Config file: %s
Usage:
dmd [<option>...] <file>...
dmd [<option>...] -run <file> [<arg>...]
Where:
<file> D source file
<arg> Argument to pass when running the resulting program
<option>:
@<cmdfile> read arguments from cmdfile
%.*s", FileName.canonicalName(global.inifilename), cast(int)help.length, &help[0]);
}
/**
* DMD's real entry point
*
* Parses command line arguments and config file, open and read all
* provided source file and do semantic analysis on them.
*
* Params:
* argc = Number of arguments passed via command line
* argv = Array of string arguments passed via command line
*
* Returns:
* Application return code
*/
private int tryMain(size_t argc, const(char)** argv, ref Param params)
{
Strings files;
Strings libmodules;
global._init();
debug
{
printf("DMD %s DEBUG\n", global._version);
fflush(stdout); // avoid interleaving with stderr output when redirecting
}
// Check for malformed input
if (argc < 1 || !argv)
{
Largs:
error(Loc.initial, "missing or null command line arguments");
fatal();
}
// Convert argc/argv into arguments[] for easier handling
Strings arguments = Strings(argc);
for (size_t i = 0; i < argc; i++)
{
if (!argv[i])
goto Largs;
arguments[i] = argv[i];
}
if (response_expand(&arguments)) // expand response files
error(Loc.initial, "can't open response file");
//for (size_t i = 0; i < arguments.dim; ++i) printf("arguments[%d] = '%s'\n", i, arguments[i]);
files.reserve(arguments.dim - 1);
// Set default values
params.argv0 = arguments[0].toDString;
// Temporary: Use 32 bits OMF as the default on Windows, for config parsing
static if (TARGET.Windows)
{
params.is64bit = false;
params.mscoff = false;
}
global.inifilename = parse_conf_arg(&arguments);
if (global.inifilename)
{
// can be empty as in -conf=
if (strlen(global.inifilename) && !FileName.exists(global.inifilename))
error(Loc.initial, "Config file '%s' does not exist.", global.inifilename);
}
else
{
version (Windows)
{
global.inifilename = findConfFile(params.argv0, "sc.ini").ptr;
}
else version (Posix)
{
global.inifilename = findConfFile(params.argv0, "dmd.conf").ptr;
}
else
{
static assert(0, "fix this");
}
}
// Read the configurarion file
auto inifile = File(global.inifilename);
inifile.read();
/* Need path of configuration file, for use in expanding @P macro
*/
const(char)* inifilepath = FileName.path(global.inifilename);
Strings sections;
StringTable environment;
environment._init(7);
/* Read the [Environment] section, so we can later
* pick up any DFLAGS settings.
*/
sections.push("Environment");
parseConfFile(&environment, global.inifilename, inifilepath, inifile.len, inifile.buffer, §ions);
const(char)* arch = params.is64bit ? "64" : "32"; // use default
arch = parse_arch_arg(&arguments, arch);
// parse architecture from DFLAGS read from [Environment] section
{
Strings dflags;
getenv_setargv(readFromEnv(&environment, "DFLAGS"), &dflags);
environment.reset(7); // erase cached environment updates
arch = parse_arch_arg(&dflags, arch);
}
bool is64bit = arch[0] == '6';
version(Windows) // delete LIB entry in [Environment] (necessary for optlink) to allow inheriting environment for MS-COFF
if (is64bit || strcmp(arch, "32mscoff") == 0)
environment.update("LIB", 3).ptrvalue = null;
// read from DFLAGS in [Environment{arch}] section
char[80] envsection = void;
sprintf(envsection.ptr, "Environment%s", arch);
sections.push(envsection.ptr);
parseConfFile(&environment, global.inifilename, inifilepath, inifile.len, inifile.buffer, §ions);
getenv_setargv(readFromEnv(&environment, "DFLAGS"), &arguments);
updateRealEnvironment(&environment);
environment.reset(1); // don't need environment cache any more
if (parseCommandLine(arguments, argc, params, files))
{
Loc loc;
errorSupplemental(loc, "run `dmd` to print the compiler manual");
errorSupplemental(loc, "run `dmd -man` to open browser on manual");
return EXIT_FAILURE;
}
if (params.usage)
{
usage();
return EXIT_SUCCESS;
}
if (params.logo)
{
logo();
return EXIT_SUCCESS;
}
/*
Prints a supplied usage text to the console and
returns the exit code for the help usage page.
Returns:
`EXIT_SUCCESS` if no errors occurred, `EXIT_FAILURE` otherwise
*/
static int printHelpUsage(string help)
{
printf("%.*s", cast(int)help.length, &help[0]);
return global.errors ? EXIT_FAILURE : EXIT_SUCCESS;
}
/*
Generates code to check for all `params` whether any usage page
has been requested.
If so, the generated code will print the help page of the flag
and return with an exit code.
Params:
params = parameters with `Usage` suffices in `params` for which
their truthness should be checked.
Returns: generated code for checking the usage pages of the provided `params`.
*/
static string generateUsageChecks(string[] params)
{
string s;
foreach (n; params)
{
s ~= q{
if (params.}~n~q{Usage)
return printHelpUsage(CLIUsage.}~n~q{Usage);
};
}
return s;
}
import dmd.cli : CLIUsage;
mixin(generateUsageChecks(["mcpu", "transition", "check", "checkAction",
"preview", "revert", "externStd"]));
if (params.manual)
{
version (Windows)
{
browse("http://dlang.org/dmd-windows.html");
}
version (linux)
{
browse("http://dlang.org/dmd-linux.html");
}
version (OSX)
{
browse("http://dlang.org/dmd-osx.html");
}
version (FreeBSD)
{
browse("http://dlang.org/dmd-freebsd.html");
}
/*NOTE: No regular builds for openbsd/dragonflybsd (yet) */
/*
version (OpenBSD)
{
browse("http://dlang.org/dmd-openbsd.html");
}
version (DragonFlyBSD)
{
browse("http://dlang.org/dmd-dragonflybsd.html");
}
*/
return EXIT_SUCCESS;
}
if (params.color)
global.console = Console.create(core.stdc.stdio.stderr);
setTarget(params); // set target operating system
setTargetCPU(params);
if (params.is64bit != is64bit)
error(Loc.initial, "the architecture must not be changed in the %s section of %s", envsection.ptr, global.inifilename);
if (global.errors)
{
fatal();
}
if (files.dim == 0)
{
if (params.jsonFieldFlags)
{
generateJson(null);
return EXIT_SUCCESS;
}
usage();
return EXIT_FAILURE;
}
reconcileCommands(params, files.dim);
// Add in command line versions
if (params.versionids)
foreach (charz; *params.versionids)
VersionCondition.addGlobalIdent(charz[0 .. strlen(charz)]);
if (params.debugids)
foreach (charz; *params.debugids)
DebugCondition.addGlobalIdent(charz[0 .. strlen(charz)]);
setTarget(params);
// Predefined version identifiers
addDefaultVersionIdentifiers(params);
setDefaultLibrary();
// Initialization
Type._init();
Id.initialize();
Module._init();
target._init(params);
Expression._init();
Objc._init();
builtin_init();
import dmd.filecache : FileCache;
FileCache._init();
version(CRuntime_Microsoft)
{
import dmd.root.longdouble;
initFPU();
}
import dmd.root.ctfloat : CTFloat;
CTFloat.initialize();
if (params.verbose)
{
stdout.printPredefinedVersions();
stdout.printGlobalConfigs();
}
//printf("%d source files\n",files.dim);
// Build import search path
static Strings* buildPath(Strings* imppath)
{
Strings* result = null;
if (imppath)
{
foreach (const path; *imppath)
{
Strings* a = FileName.splitPath(path);
if (a)
{
if (!result)
result = new Strings();
result.append(a);
}
}
}
return result;
}
global.path = buildPath(params.imppath);
global.filePath = buildPath(params.fileImppath);
if (params.addMain)
{
files.push(global.main_d); // a dummy name, we never actually look up this file
}
// Create Modules
Modules modules = createModules(files, libmodules);
// Read files
/* Start by "reading" the dummy main.d file
*/
if (params.addMain)
{
bool added = false;
foreach (m; modules)
{
if (strcmp(m.srcfile.name.toChars(), global.main_d) == 0)
{
string buf = "int main(){return 0;}";
m.srcfile.setbuffer(cast(void*)buf.ptr, buf.length);
m.srcfile._ref = 1;
added = true;
break;
}
}
assert(added);
}
enum ASYNCREAD = false;
static if (ASYNCREAD)
{
// Multi threaded
AsyncRead* aw = AsyncRead.create(modules.dim);
foreach (m; modules)
{
aw.addFile(m.srcfile);
}
aw.start();
}
else
{
// Single threaded
foreach (m; modules)
{
m.read(Loc.initial);
}
}
// Parse files
bool anydocfiles = false;
size_t filecount = modules.dim;
for (size_t filei = 0, modi = 0; filei < filecount; filei++, modi++)
{
Module m = modules[modi];
if (params.verbose)
message("parse %s", m.toChars());
if (!Module.rootModule)
Module.rootModule = m;
m.importedFrom = m; // m.isRoot() == true
if (!params.oneobj || modi == 0 || m.isDocFile)
m.deleteObjFile();
static if (ASYNCREAD)
{
if (aw.read(filei))
{
error(Loc.initial, "cannot read file %s", m.srcfile.name.toChars());
fatal();
}
}
m.parse();
if (m.isHdrFile)
{
// Remove m's object file from list of object files
for (size_t j = 0; j < params.objfiles.dim; j++)
{
if (m.objfile.name.toChars() == params.objfiles[j])
{
params.objfiles.remove(j);
break;
}
}
if (params.objfiles.dim == 0)
params.link = false;
}
if (m.isDocFile)
{
anydocfiles = true;
gendocfile(m);
// Remove m from list of modules
modules.remove(modi);
modi--;
// Remove m's object file from list of object files
for (size_t j = 0; j < params.objfiles.dim; j++)
{
if (m.objfile.name.toChars() == params.objfiles[j])
{
params.objfiles.remove(j);
break;
}
}
if (params.objfiles.dim == 0)
params.link = false;
}
}
static if (ASYNCREAD)
{
AsyncRead.dispose(aw);
}
if (anydocfiles && modules.dim && (params.oneobj || params.objname))
{
error(Loc.initial, "conflicting Ddoc and obj generation options");
fatal();
}
if (global.errors)
fatal();
if (params.doHdrGeneration)
{
/* Generate 'header' import files.
* Since 'header' import files must be independent of command
* line switches and what else is imported, they are generated
* before any semantic analysis.
*/
foreach (m; modules)
{
if (m.isHdrFile)
continue;
if (params.verbose)
message("import %s", m.toChars());
genhdrfile(m);
}
}
if (global.errors)
fatal();
// load all unconditional imports for better symbol resolving
foreach (m; modules)
{
if (params.verbose)
message("importall %s", m.toChars());
m.importAll(null);
}
if (global.errors)
fatal();
backend_init();
// Do semantic analysis
foreach (m; modules)
{
if (params.verbose)
message("semantic %s", m.toChars());
m.dsymbolSemantic(null);
}
//if (global.errors)
// fatal();
Module.dprogress = 1;
Module.runDeferredSemantic();
if (Module.deferred.dim)
{
for (size_t i = 0; i < Module.deferred.dim; i++)
{
Dsymbol sd = Module.deferred[i];
sd.error("unable to resolve forward reference in definition");
}
//fatal();
}
// Do pass 2 semantic analysis
foreach (m; modules)
{
if (params.verbose)
message("semantic2 %s", m.toChars());
m.semantic2(null);
}
Module.runDeferredSemantic2();
if (global.errors)
fatal();
// Do pass 3 semantic analysis
foreach (m; modules)
{
if (params.verbose)
message("semantic3 %s", m.toChars());
m.semantic3(null);
}
if (includeImports)
{
// Note: DO NOT USE foreach here because Module.amodules.dim can
// change on each iteration of the loop
for (size_t i = 0; i < compiledImports.dim; i++)
{
auto m = compiledImports[i];
assert(m.isRoot);
if (params.verbose)
message("semantic3 %s", m.toChars());
m.semantic3(null);
modules.push(m);
}
}
Module.runDeferredSemantic3();
if (global.errors)
fatal();
// Scan for functions to inline
if (params.useInline)
{
foreach (m; modules)
{
if (params.verbose)
message("inline scan %s", m.toChars());
inlineScanModule(m);
}
}
// Do not attempt to generate output files if errors or warnings occurred
if (global.errors || global.warnings)
fatal();
// inlineScan incrementally run semantic3 of each expanded functions.
// So deps file generation should be moved after the inlinig stage.
if (params.moduleDeps)
{
foreach (i; 1 .. modules[0].aimports.dim)
semantic3OnDependencies(modules[0].aimports[i]);
OutBuffer* ob = params.moduleDeps;
if (params.moduleDepsFile)
{
auto deps = File(params.moduleDepsFile);
deps.setbuffer(cast(void*)ob.data, ob.offset);
writeFile(Loc.initial, &deps);
}
else
printf("%.*s", cast(int)ob.offset, ob.data);
}
printCtfePerformanceStats();
Library library = null;
if (params.lib)
{
if (params.objfiles.dim == 0)
{
error(Loc.initial, "no input files");
return EXIT_FAILURE;
}
library = Library.factory();
library.setFilename(params.objdir, params.libname);
// Add input object and input library files to output library
foreach (p; libmodules)
library.addObject(p, null);
}
// Generate output files
if (params.doJsonGeneration)
{
generateJson(&modules);
}
if (!global.errors && params.doDocComments)
{
foreach (m; modules)
{
gendocfile(m);
}
}
if (params.vcg_ast)
{
import dmd.hdrgen;
foreach (mod; modules)
{
auto buf = OutBuffer();
buf.doindent = 1;
moduleToBuffer(&buf, mod);
// write the output to $(filename).cg
auto cgFilename = FileName.addExt(mod.srcfile.toString(), "cg");
auto cgFile = File(cgFilename);
cgFile.setbuffer(buf.data, buf.offset);
cgFile._ref = 1;
cgFile.write();
}
}
if (!params.obj)
{
}
else if (params.oneobj)
{
Module firstm; // first module we generate code for
foreach (m; modules)
{
if (m.isHdrFile)
continue;
if (!firstm)
{
firstm = m;
obj_start(cast(char*)m.srcfile.toChars());
}
if (params.verbose)
message("code %s", m.toChars());
genObjFile(m, false);
if (entrypoint && m == rootHasMain)
genObjFile(entrypoint, false);
}
if (!global.errors && firstm)
{
obj_end(library, firstm.objfile);
}
}
else
{
foreach (m; modules)
{
if (m.isHdrFile)
continue;
if (params.verbose)
message("code %s", m.toChars());
obj_start(m.srcfile.toChars());
genObjFile(m, params.multiobj);
if (entrypoint && m == rootHasMain)
genObjFile(entrypoint, params.multiobj);
obj_end(library, m.objfile);
obj_write_deferred(library);
if (global.errors && !params.lib)
m.deleteObjFile();
}
}
if (params.lib && !global.errors)
library.write();
backend_term();
if (global.errors)
fatal();
int status = EXIT_SUCCESS;
if (!params.objfiles.dim)
{
if (params.link)
error(Loc.initial, "no object files to link");
}
else
{
if (params.link)
status = runLINK();
if (params.run)
{
if (!status)
{
status = runProgram();
/* Delete .obj files and .exe file
*/
foreach (m; modules)
{
m.deleteObjFile();
if (params.oneobj)
break;
}
remove(params.exefile);
}
}
}
if (global.errors || global.warnings)
fatal();
return status;
}
private void generateJson(Modules* modules)
{
OutBuffer buf;
json_generate(&buf, modules);
// Write buf to file
const(char)* name = global.params.jsonfilename;
if (name && name[0] == '-' && name[1] == 0)
{
// Write to stdout; assume it succeeds
size_t n = fwrite(buf.data, 1, buf.offset, stdout);
assert(n == buf.offset); // keep gcc happy about return values
}
else
{
/* The filename generation code here should be harmonized with Module::setOutfile()
*/
const(char)* jsonfilename;
if (name && *name)
{
jsonfilename = FileName.defaultExt(name, global.json_ext);
}
else
{
if (global.params.objfiles.dim == 0)
{
error(Loc.initial, "cannot determine JSON filename, use `-Xf=<file>` or provide a source file");
fatal();
}
// Generate json file name from first obj name
const(char)* n = global.params.objfiles[0];
n = FileName.name(n);
//if (!FileName::absolute(name))
// name = FileName::combine(dir, name);
jsonfilename = FileName.forceExt(n, global.json_ext);
}
ensurePathToNameExists(Loc.initial, jsonfilename);
auto jsonfile = new File(jsonfilename);
jsonfile.setbuffer(buf.data, buf.offset);
jsonfile._ref = 1;
writeFile(Loc.initial, jsonfile);
}
}
/**
* Entry point which forwards to `tryMain`.
*
* Returns:
* Return code of the application
*/
version(NoMain) {} else
int main()
{
import core.memory;
import core.runtime;
version (GC)
{
}
else
{
GC.disable();
}
version(D_Coverage)
{
// for now we need to manually set the source path
string dirName(string path, char separator)
{
for (size_t i = path.length - 1; i > 0; i--)
{
if (path[i] == separator)
return path[0..i];
}
return path;
}
version (Windows)
enum sourcePath = dirName(dirName(__FILE_FULL_PATH__, '\\'), '\\');
else
enum sourcePath = dirName(dirName(__FILE_FULL_PATH__, '/'), '/');
dmd_coverSourcePath(sourcePath);
dmd_coverDestPath(sourcePath);
dmd_coverSetMerge(true);
}
scope(failure) stderr.printInternalFailure;
auto args = Runtime.cArgs();
return tryMain(args.argc, cast(const(char)**)args.argv, global.params);
}
/**
* Parses an environment variable containing command-line flags
* and append them to `args`.
*
* This function is used to read the content of DFLAGS.
* Flags are separated based on spaces and tabs.
*
* Params:
* envvalue = The content of an environment variable
* args = Array to append the flags to, if any.
*/
void getenv_setargv(const(char)* envvalue, Strings* args)
{
if (!envvalue)
return;
char* env = mem.xstrdup(envvalue); // create our own writable copy
//printf("env = '%s'\n", env);
while (1)
{
switch (*env)
{
case ' ':
case '\t':
env++;
break;
case 0:
return;
default:
{
args.push(env); // append
auto p = env;
auto slash = 0;
bool instring = false;
while (1)
{
auto c = *env++;
switch (c)
{
case '"':
p -= (slash >> 1);
if (slash & 1)
{
p--;
goto default;
}
instring ^= true;
slash = 0;
continue;
case ' ':
case '\t':
if (instring)
goto default;
*p = 0;
//if (wildcard)
// wildcardexpand(); // not implemented
break;
case '\\':
slash++;
*p++ = c;
continue;
case 0:
*p = 0;
//if (wildcard)
// wildcardexpand(); // not implemented
return;
default:
slash = 0;
*p++ = c;
continue;
}
break;
}
break;
}
}
}
}
/**
* Parse command line arguments for the last instance of -m32, -m64 or -m32mscoff
* to detect the desired architecture.
*
* Params:
* args = Command line arguments
* arch = Default value to use for architecture.
* Should be "32" or "64"
*
* Returns:
* "32", "64" or "32mscoff" if the "-m32", "-m64", "-m32mscoff" flags were passed,
* respectively. If they weren't, return `arch`.
*/
const(char)* parse_arch_arg(Strings* args, const(char)* arch)
{
foreach (const p; *args)
{
if (p[0] == '-')
{
if (strcmp(p + 1, "m32") == 0 || strcmp(p + 1, "m32mscoff") == 0 || strcmp(p + 1, "m64") == 0)
arch = p + 2;
else if (strcmp(p + 1, "run") == 0)
break;
}
}
return arch;
}
/**
* Parse command line arguments for the last instance of -conf=path.
*
* Params:
* args = Command line arguments
*
* Returns:
* The 'path' in -conf=path, which is the path to the config file to use
*/
const(char)* parse_conf_arg(Strings* args)
{
const(char)* conf = null;
foreach (const p; *args)
{
if (p[0] == '-')
{
if (strncmp(p + 1, "conf=", 5) == 0)
conf = p + 6;
else if (strcmp(p + 1, "run") == 0)
break;
}
}
return conf;
}