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llvm-project/clang/Driver/clang.cpp

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//===--- clang.cpp - C-Language Front-end ---------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This utility may be invoked in the following manner:
// clang --help - Output help info.
// clang [options] - Read from stdin.
// clang [options] file - Read from "file".
// clang [options] file1 file2 - Read these files.
//
//===----------------------------------------------------------------------===//
//
// TODO: Options to support:
//
// -ffatal-errors
// -ftabstop=width
//
//===----------------------------------------------------------------------===//
#include "clang.h"
#include "ASTConsumers.h"
#include "clang/Driver/HTMLDiagnostics.h"
#include "clang/Driver/InitHeaderSearch.h"
#include "clang/Driver/TextDiagnosticBuffer.h"
#include "clang/Driver/TextDiagnosticPrinter.h"
#include "clang/Analysis/PathDiagnostic.h"
#include "clang/AST/Decl.h"
#include "clang/AST/TranslationUnit.h"
#include "clang/CodeGen/ModuleBuilder.h"
#include "clang/Sema/ParseAST.h"
#include "clang/AST/ASTConsumer.h"
#include "clang/Parse/Parser.h"
#include "clang/Lex/HeaderSearch.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Basic/TargetInfo.h"
#include "llvm/ADT/OwningPtr.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Config/config.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/System/Host.h"
#include "llvm/System/Path.h"
#include "llvm/System/Signals.h"
using namespace clang;
//===----------------------------------------------------------------------===//
// Global options.
//===----------------------------------------------------------------------===//
static llvm::cl::opt<bool>
Verbose("v", llvm::cl::desc("Enable verbose output"));
static llvm::cl::opt<bool>
Stats("print-stats",
llvm::cl::desc("Print performance metrics and statistics"));
enum ProgActions {
RewriteObjC, // ObjC->C Rewriter.
RewriteBlocks, // ObjC->C Rewriter for Blocks.
RewriteMacros, // Expand macros but not #includes.
HTMLTest, // HTML displayer testing stuff.
EmitLLVM, // Emit a .ll file.
EmitBC, // Emit a .bc file.
SerializeAST, // Emit a .ast file.
EmitHTML, // Translate input source into HTML.
ASTPrint, // Parse ASTs and print them.
ASTDump, // Parse ASTs and dump them.
ASTView, // Parse ASTs and view them in Graphviz.
TestSerialization, // Run experimental serialization code.
ParsePrintCallbacks, // Parse and print each callback.
ParseSyntaxOnly, // Parse and perform semantic analysis.
ParseNoop, // Parse with noop callbacks.
RunPreprocessorOnly, // Just lex, no output.
PrintPreprocessedInput, // -E mode.
DumpTokens, // Token dump mode.
RunAnalysis // Run one or more source code analyses.
};
static llvm::cl::opt<ProgActions>
ProgAction(llvm::cl::desc("Choose output type:"), llvm::cl::ZeroOrMore,
llvm::cl::init(ParseSyntaxOnly),
llvm::cl::values(
clEnumValN(RunPreprocessorOnly, "Eonly",
"Just run preprocessor, no output (for timings)"),
clEnumValN(PrintPreprocessedInput, "E",
"Run preprocessor, emit preprocessed file"),
clEnumValN(DumpTokens, "dumptokens",
"Run preprocessor, dump internal rep of tokens"),
clEnumValN(ParseNoop, "parse-noop",
"Run parser with noop callbacks (for timings)"),
clEnumValN(ParseSyntaxOnly, "fsyntax-only",
"Run parser and perform semantic analysis"),
clEnumValN(ParsePrintCallbacks, "parse-print-callbacks",
"Run parser and print each callback invoked"),
clEnumValN(EmitHTML, "emit-html",
"Output input source as HTML"),
clEnumValN(ASTPrint, "ast-print",
"Build ASTs and then pretty-print them"),
clEnumValN(ASTDump, "ast-dump",
"Build ASTs and then debug dump them"),
clEnumValN(ASTView, "ast-view",
"Build ASTs and view them with GraphViz"),
clEnumValN(TestSerialization, "test-pickling",
"Run prototype serialization code"),
clEnumValN(EmitLLVM, "emit-llvm",
"Build ASTs then convert to LLVM, emit .ll file"),
clEnumValN(EmitBC, "emit-llvm-bc",
"Build ASTs then convert to LLVM, emit .bc file"),
clEnumValN(SerializeAST, "serialize",
"Build ASTs and emit .ast file"),
clEnumValN(RewriteObjC, "rewrite-objc",
"Rewrite ObjC into C (code rewriter example)"),
clEnumValN(RewriteMacros, "rewrite-macros",
"Expand macros without full preprocessing"),
clEnumValN(RewriteBlocks, "rewrite-blocks",
"Rewrite Blocks to C"),
clEnumValEnd));
static llvm::cl::opt<std::string>
OutputFile("o",
llvm::cl::value_desc("path"),
llvm::cl::desc("Specify output file (for --serialize, this is a directory)"));
//===----------------------------------------------------------------------===//
// Code Generator Options
//===----------------------------------------------------------------------===//
static llvm::cl::opt<bool>
GenerateDebugInfo("g",
llvm::cl::desc("Generate source level debug information"));
//===----------------------------------------------------------------------===//
// Diagnostic Options
//===----------------------------------------------------------------------===//
static llvm::cl::opt<bool>
VerifyDiagnostics("verify",
llvm::cl::desc("Verify emitted diagnostics and warnings"));
static llvm::cl::opt<std::string>
HTMLDiag("html-diags",
llvm::cl::desc("Generate HTML to report diagnostics"),
llvm::cl::value_desc("HTML directory"));
static llvm::cl::opt<bool>
NoShowColumn("fno-show-column",
llvm::cl::desc("Do not include column number on diagnostics"));
static llvm::cl::opt<bool>
NoCaretDiagnostics("fno-caret-diagnostics",
llvm::cl::desc("Do not include source line and caret with"
" diagnostics"));
//===----------------------------------------------------------------------===//
// Analyzer Options
//===----------------------------------------------------------------------===//
static llvm::cl::opt<bool>
VisualizeEGDot("analyzer-viz-egraph-graphviz",
llvm::cl::desc("Display exploded graph using GraphViz"));
static llvm::cl::opt<bool>
VisualizeEGUbi("analyzer-viz-egraph-ubigraph",
llvm::cl::desc("Display exploded graph using Ubigraph"));
static llvm::cl::opt<bool>
AnalyzeAll("analyzer-opt-analyze-headers",
llvm::cl::desc("Force the static analyzer to analyze "
"functions defined in header files"));
static llvm::cl::list<Analyses>
AnalysisList(llvm::cl::desc("Available Source Code Analyses:"),
llvm::cl::values(
#define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE)\
clEnumValN(NAME, CMDFLAG, DESC),
#include "Analyses.def"
clEnumValEnd));
//===----------------------------------------------------------------------===//
// Language Options
//===----------------------------------------------------------------------===//
enum LangKind {
langkind_unspecified,
langkind_c,
langkind_c_cpp,
langkind_cxx,
langkind_cxx_cpp,
langkind_objc,
langkind_objc_cpp,
langkind_objcxx,
langkind_objcxx_cpp
};
/* TODO: GCC also accepts:
c-header c++-header objective-c-header objective-c++-header
assembler assembler-with-cpp
ada, f77*, ratfor (!), f95, java, treelang
*/
static llvm::cl::opt<LangKind>
BaseLang("x", llvm::cl::desc("Base language to compile"),
llvm::cl::init(langkind_unspecified),
llvm::cl::values(clEnumValN(langkind_c, "c", "C"),
clEnumValN(langkind_cxx, "c++", "C++"),
clEnumValN(langkind_objc, "objective-c", "Objective C"),
clEnumValN(langkind_objcxx,"objective-c++","Objective C++"),
clEnumValN(langkind_c_cpp, "c-cpp-output",
"Preprocessed C"),
clEnumValN(langkind_cxx_cpp, "c++-cpp-output",
"Preprocessed C++"),
clEnumValN(langkind_objc_cpp, "objective-c-cpp-output",
"Preprocessed Objective C"),
clEnumValN(langkind_objcxx_cpp,"objective-c++-cpp-output",
"Preprocessed Objective C++"),
clEnumValEnd));
static llvm::cl::opt<bool>
LangObjC("ObjC", llvm::cl::desc("Set base language to Objective-C"),
llvm::cl::Hidden);
static llvm::cl::opt<bool>
LangObjCXX("ObjC++", llvm::cl::desc("Set base language to Objective-C++"),
llvm::cl::Hidden);
/// InitializeBaseLanguage - Handle the -x foo options.
static void InitializeBaseLanguage() {
if (LangObjC)
BaseLang = langkind_objc;
else if (LangObjCXX)
BaseLang = langkind_objcxx;
}
static LangKind GetLanguage(const std::string &Filename) {
if (BaseLang != langkind_unspecified)
return BaseLang;
std::string::size_type DotPos = Filename.rfind('.');
if (DotPos == std::string::npos) {
BaseLang = langkind_c; // Default to C if no extension.
return langkind_c;
}
std::string Ext = std::string(Filename.begin()+DotPos+1, Filename.end());
// C header: .h
// C++ header: .hh or .H;
// assembler no preprocessing: .s
// assembler: .S
if (Ext == "c")
return langkind_c;
else if (Ext == "i")
return langkind_c_cpp;
else if (Ext == "ii")
return langkind_cxx_cpp;
else if (Ext == "m")
return langkind_objc;
else if (Ext == "mi")
return langkind_objc_cpp;
else if (Ext == "mm" || Ext == "M")
return langkind_objcxx;
else if (Ext == "mii")
return langkind_objcxx_cpp;
else if (Ext == "C" || Ext == "cc" || Ext == "cpp" || Ext == "CPP" ||
Ext == "c++" || Ext == "cp" || Ext == "cxx")
return langkind_cxx;
else
return langkind_c;
}
static void InitializeLangOptions(LangOptions &Options, LangKind LK) {
// FIXME: implement -fpreprocessed mode.
bool NoPreprocess = false;
switch (LK) {
default: assert(0 && "Unknown language kind!");
case langkind_c_cpp:
NoPreprocess = true;
// FALLTHROUGH
case langkind_c:
break;
case langkind_cxx_cpp:
NoPreprocess = true;
// FALLTHROUGH
case langkind_cxx:
Options.CPlusPlus = 1;
break;
case langkind_objc_cpp:
NoPreprocess = true;
// FALLTHROUGH
case langkind_objc:
Options.ObjC1 = Options.ObjC2 = 1;
break;
case langkind_objcxx_cpp:
NoPreprocess = true;
// FALLTHROUGH
case langkind_objcxx:
Options.ObjC1 = Options.ObjC2 = 1;
Options.CPlusPlus = 1;
break;
}
}
/// LangStds - Language standards we support.
enum LangStds {
lang_unspecified,
lang_c89, lang_c94, lang_c99,
lang_gnu_START,
lang_gnu89 = lang_gnu_START, lang_gnu99,
lang_cxx98, lang_gnucxx98,
lang_cxx0x, lang_gnucxx0x
};
static llvm::cl::opt<LangStds>
LangStd("std", llvm::cl::desc("Language standard to compile for"),
llvm::cl::init(lang_unspecified),
llvm::cl::values(clEnumValN(lang_c89, "c89", "ISO C 1990"),
clEnumValN(lang_c89, "c90", "ISO C 1990"),
clEnumValN(lang_c89, "iso9899:1990", "ISO C 1990"),
clEnumValN(lang_c94, "iso9899:199409",
"ISO C 1990 with amendment 1"),
clEnumValN(lang_c99, "c99", "ISO C 1999"),
// clEnumValN(lang_c99, "c9x", "ISO C 1999"),
clEnumValN(lang_c99, "iso9899:1999", "ISO C 1999"),
// clEnumValN(lang_c99, "iso9899:199x", "ISO C 1999"),
clEnumValN(lang_gnu89, "gnu89",
"ISO C 1990 with GNU extensions (default for C)"),
clEnumValN(lang_gnu99, "gnu99",
"ISO C 1999 with GNU extensions"),
clEnumValN(lang_gnu99, "gnu9x",
"ISO C 1999 with GNU extensions"),
clEnumValN(lang_cxx98, "c++98",
"ISO C++ 1998 with amendments"),
clEnumValN(lang_gnucxx98, "gnu++98",
"ISO C++ 1998 with amendments and GNU "
"extensions (default for C++)"),
clEnumValN(lang_cxx0x, "c++0x",
"Upcoming ISO C++ 200x with amendments"),
clEnumValN(lang_gnucxx0x, "gnu++0x",
"Upcoming ISO C++ 200x with amendments and GNU "
"extensions (default for C++)"),
clEnumValEnd));
static llvm::cl::opt<bool>
NoOperatorNames("fno-operator-names",
llvm::cl::desc("Do not treat C++ operator name keywords as "
"synonyms for operators"));
static llvm::cl::opt<bool>
PascalStrings("fpascal-strings",
llvm::cl::desc("Recognize and construct Pascal-style "
"string literals"));
static llvm::cl::opt<bool>
MSExtensions("fms-extensions",
llvm::cl::desc("Accept some non-standard constructs used in "
"Microsoft header files "));
static llvm::cl::opt<bool>
WritableStrings("fwritable-strings",
llvm::cl::desc("Store string literals as writable data"));
static llvm::cl::opt<bool>
LaxVectorConversions("flax-vector-conversions",
llvm::cl::desc("Allow implicit conversions between vectors"
" with a different number of elements or "
"different element types"));
// FIXME: This (and all GCC -f options) really come in -f... and
// -fno-... forms, and additionally support automagic behavior when
// they are not defined. For example, -fexceptions defaults to on or
// off depending on the language. We should support this behavior in
// some form (perhaps just add a facility for distinguishing when an
// has its default value from when it has been set to its default
// value).
static llvm::cl::opt<bool>
Exceptions("fexceptions",
llvm::cl::desc("Enable support for exception handling."));
static llvm::cl::opt<bool>
GNURuntime("fgnu-runtime",
llvm::cl::desc("Generate output compatible with the standard GNU Objective-C runtime."));
static llvm::cl::opt<bool>
NeXTRuntime("fnext-runtime",
llvm::cl::desc("Generate output compatible with the NeXT runtime."));
static llvm::cl::opt<bool>
Trigraphs("trigraphs", llvm::cl::desc("Process trigraph sequences."));
static llvm::cl::opt<bool>
Ansi("ansi", llvm::cl::desc("Equivalent to specifying -std=c89."));
// FIXME: add:
// -fdollars-in-identifiers
// -fpascal-strings
static void InitializeLanguageStandard(LangOptions &Options, LangKind LK,
TargetInfo *Target) {
if (Ansi) // "The -ansi option is equivalent to -std=c89."
LangStd = lang_c89;
if (LangStd == lang_unspecified) {
// Based on the base language, pick one.
switch (LK) {
default: assert(0 && "Unknown base language");
case langkind_c:
case langkind_c_cpp:
case langkind_objc:
case langkind_objc_cpp:
LangStd = lang_gnu99;
break;
case langkind_cxx:
case langkind_cxx_cpp:
case langkind_objcxx:
case langkind_objcxx_cpp:
LangStd = lang_gnucxx98;
break;
}
}
switch (LangStd) {
default: assert(0 && "Unknown language standard!");
// Fall through from newer standards to older ones. This isn't really right.
// FIXME: Enable specifically the right features based on the language stds.
case lang_gnucxx0x:
case lang_cxx0x:
Options.CPlusPlus0x = 1;
// FALL THROUGH
case lang_gnucxx98:
case lang_cxx98:
Options.CPlusPlus = 1;
Options.CXXOperatorNames = !NoOperatorNames;
Options.Boolean = 1;
// FALL THROUGH.
case lang_gnu99:
case lang_c99:
Options.C99 = 1;
Options.HexFloats = 1;
// FALL THROUGH.
case lang_gnu89:
Options.BCPLComment = 1; // Only for C99/C++.
// FALL THROUGH.
case lang_c94:
Options.Digraphs = 1; // C94, C99, C++.
// FALL THROUGH.
case lang_c89:
break;
}
if (Options.CPlusPlus) {
Options.C99 = 0;
Options.HexFloats = (LangStd == lang_gnucxx98 || LangStd==lang_gnucxx0x);
}
if (LangStd == lang_c89 || LangStd == lang_c94 || LangStd == lang_gnu89)
Options.ImplicitInt = 1;
else
Options.ImplicitInt = 0;
// Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs or -ansi
// is specified, or -std is set to a conforming mode.
Options.Trigraphs = LangStd < lang_gnu_START || Trigraphs ? 1 : 0;
Options.DollarIdents = 1; // FIXME: Really a target property.
Options.PascalStrings = PascalStrings;
Options.Microsoft = MSExtensions;
Options.WritableStrings = WritableStrings;
Options.LaxVectorConversions = LaxVectorConversions;
Options.Exceptions = Exceptions;
if (NeXTRuntime) {
Options.NeXTRuntime = 1;
} else if (GNURuntime) {
Options.NeXTRuntime = 0;
} else {
Options.NeXTRuntime = Target->useNeXTRuntimeAsDefault();
}
}
static llvm::cl::opt<bool>
ObjCExclusiveGC("fobjc-gc-only",
llvm::cl::desc("Use GC exclusively for Objective-C related "
"memory management"));
static llvm::cl::opt<bool>
ObjCEnableGC("fobjc-gc",
llvm::cl::desc("Enable Objective-C garbage collection"));
void InitializeGCMode(LangOptions &Options) {
if (ObjCExclusiveGC)
Options.setGCMode(LangOptions::GCOnly);
else if (ObjCEnableGC)
Options.setGCMode(LangOptions::HybridGC);
}
//===----------------------------------------------------------------------===//
// Our DiagnosticClient implementation
//===----------------------------------------------------------------------===//
// FIXME: Werror should take a list of things, -Werror=foo,bar
static llvm::cl::opt<bool>
WarningsAsErrors("Werror", llvm::cl::desc("Treat all warnings as errors"));
static llvm::cl::opt<bool>
SilenceWarnings("w", llvm::cl::desc("Do not emit any warnings"));
static llvm::cl::opt<bool>
WarnOnExtensions("pedantic", llvm::cl::init(false),
llvm::cl::desc("Issue a warning on uses of GCC extensions"));
static llvm::cl::opt<bool>
ErrorOnExtensions("pedantic-errors",
llvm::cl::desc("Issue an error on uses of GCC extensions"));
static llvm::cl::opt<bool>
SuppressSystemWarnings("suppress-system-warnings",
llvm::cl::desc("Suppress warnings issued in system headers"),
llvm::cl::init(true));
static llvm::cl::opt<bool>
WarnUnusedMacros("Wunused_macros",
llvm::cl::desc("Warn for unused macros in the main translation unit"));
static llvm::cl::opt<bool>
WarnFloatEqual("Wfloat-equal",
llvm::cl::desc("Warn about equality comparisons of floating point values"));
static llvm::cl::opt<bool>
WarnNoFormatNonLiteral("Wno-format-nonliteral",
llvm::cl::desc("Do not warn about non-literal format strings"));
static llvm::cl::opt<bool>
WarnUndefMacros("Wundef",
llvm::cl::desc("Warn on use of undefined macros in #if's"));
static llvm::cl::opt<bool>
WarnImplicitFunctionDeclaration("Wimplicit-function-declaration",
llvm::cl::desc("Warn about uses of implicitly defined functions"));
/// InitializeDiagnostics - Initialize the diagnostic object, based on the
/// current command line option settings.
static void InitializeDiagnostics(Diagnostic &Diags) {
Diags.setIgnoreAllWarnings(SilenceWarnings);
Diags.setWarningsAsErrors(WarningsAsErrors);
Diags.setWarnOnExtensions(WarnOnExtensions);
Diags.setErrorOnExtensions(ErrorOnExtensions);
// Suppress warnings in system headers unless requested not to.
Diags.setSuppressSystemWarnings(SuppressSystemWarnings);
// Silence the "macro is not used" warning unless requested.
if (!WarnUnusedMacros)
Diags.setDiagnosticMapping(diag::pp_macro_not_used, diag::MAP_IGNORE);
// Silence "floating point comparison" warnings unless requested.
if (!WarnFloatEqual)
Diags.setDiagnosticMapping(diag::warn_floatingpoint_eq, diag::MAP_IGNORE);
// Silence "format string is not a string literal" warnings if requested
if (WarnNoFormatNonLiteral)
Diags.setDiagnosticMapping(diag::warn_printf_not_string_constant,
diag::MAP_IGNORE);
if (!WarnUndefMacros)
Diags.setDiagnosticMapping(diag::warn_pp_undef_identifier,diag::MAP_IGNORE);
if (!WarnImplicitFunctionDeclaration)
Diags.setDiagnosticMapping(diag::warn_implicit_function_decl,
diag::MAP_IGNORE);
if (MSExtensions) // MS allows unnamed struct/union fields.
Diags.setDiagnosticMapping(diag::w_no_declarators, diag::MAP_IGNORE);
// If -pedantic-errors is set, turn extensions that warn by default into
// errors.
if (ErrorOnExtensions) {
Diags.setDiagnosticMapping(diag::warn_hex_escape_too_large,
diag::MAP_ERROR);
Diags.setDiagnosticMapping(diag::warn_octal_escape_too_large,
diag::MAP_ERROR);
}
}
//===----------------------------------------------------------------------===//
// Analysis-specific options.
//===----------------------------------------------------------------------===//
static llvm::cl::opt<std::string>
AnalyzeSpecificFunction("analyze-function",
llvm::cl::desc("Run analysis on specific function"));
static llvm::cl::opt<bool>
TrimGraph("trim-egraph",
llvm::cl::desc("Only show error-related paths in the analysis graph"));
//===----------------------------------------------------------------------===//
// Target Triple Processing.
//===----------------------------------------------------------------------===//
static llvm::cl::opt<std::string>
TargetTriple("triple",
llvm::cl::desc("Specify target triple (e.g. i686-apple-darwin9)"));
static llvm::cl::opt<std::string>
Arch("arch", llvm::cl::desc("Specify target architecture (e.g. i686)"));
static llvm::cl::opt<std::string>
MacOSVersionMin("mmacosx-version-min",
llvm::cl::desc("Specify target Mac OS/X version (e.g. 10.5)"));
// If -mmacosx-version-min=10.3.9 is specified, change the triple from being
// something like powerpc-apple-darwin9 to powerpc-apple-darwin7
static void HandleMacOSVersionMin(std::string &Triple) {
std::string::size_type DarwinDashIdx = Triple.find("-darwin");
if (DarwinDashIdx == std::string::npos) {
fprintf(stderr,
"-mmacosx-version-min only valid for darwin (Mac OS/X) targets\n");
exit(1);
}
unsigned DarwinNumIdx = DarwinDashIdx + strlen("-darwin");
// Remove the number.
Triple.resize(DarwinNumIdx);
// Validate that MacOSVersionMin is a 'version number', starting with 10.[3-9]
bool MacOSVersionMinIsInvalid = false;
int VersionNum = 0;
if (MacOSVersionMin.size() < 4 ||
MacOSVersionMin.substr(0, 3) != "10." ||
!isdigit(MacOSVersionMin[3])) {
MacOSVersionMinIsInvalid = true;
} else {
const char *Start = MacOSVersionMin.c_str()+3;
char *End = 0;
VersionNum = (int)strtol(Start, &End, 10);
// The version number must be in the range 0-9.
MacOSVersionMinIsInvalid = (unsigned)VersionNum > 9;
// Turn MacOSVersionMin into a darwin number: e.g. 10.3.9 is 3 -> 7.
Triple += llvm::itostr(VersionNum+4);
if (End[0] == '.' && isdigit(End[1]) && End[2] == '\0') { // 10.4.7 is ok.
// Add the period piece (.7) to the end of the triple. This gives us
// something like ...-darwin8.7
Triple += End;
} else if (End[0] != '\0') { // "10.4" is ok. 10.4x is not.
MacOSVersionMinIsInvalid = true;
}
}
if (MacOSVersionMinIsInvalid) {
fprintf(stderr,
"-mmacosx-version-min=%s is invalid, expected something like '10.4'.\n",
MacOSVersionMin.c_str());
exit(1);
}
}
/// CreateTargetTriple - Process the various options that affect the target
/// triple and build a final aggregate triple that we are compiling for.
static std::string CreateTargetTriple() {
// Initialize base triple. If a -triple option has been specified, use
// that triple. Otherwise, default to the host triple.
std::string Triple = TargetTriple;
if (Triple.empty()) {
Triple = LLVM_HOSTTRIPLE;
// On darwin, we want to update the version to match that of the
// host.
std::string::size_type DarwinDashIdx = Triple.find("-darwin");
if (DarwinDashIdx != std::string::npos) {
Triple.resize(DarwinDashIdx + strlen("-darwin"));
Triple += llvm::sys::osVersion();
}
}
// If -arch foo was specified, remove the architecture from the triple we have
// so far and replace it with the specified one.
if (!Arch.empty()) {
// Decompose the base triple into "arch" and suffix.
std::string::size_type FirstDashIdx = Triple.find('-');
if (FirstDashIdx == std::string::npos) {
fprintf(stderr,
"Malformed target triple: \"%s\" ('-' could not be found).\n",
Triple.c_str());
exit(1);
}
Triple = Arch + std::string(Triple.begin()+FirstDashIdx, Triple.end());
}
// If -mmacosx-version-min=10.3.9 is specified, change the triple from being
// something like powerpc-apple-darwin9 to powerpc-apple-darwin7
if (!MacOSVersionMin.empty())
HandleMacOSVersionMin(Triple);
return Triple;
}
//===----------------------------------------------------------------------===//
// Preprocessor Initialization
//===----------------------------------------------------------------------===//
// FIXME: Preprocessor builtins to support.
// -A... - Play with #assertions
// -undef - Undefine all predefined macros
static llvm::cl::list<std::string>
D_macros("D", llvm::cl::value_desc("macro"), llvm::cl::Prefix,
llvm::cl::desc("Predefine the specified macro"));
static llvm::cl::list<std::string>
U_macros("U", llvm::cl::value_desc("macro"), llvm::cl::Prefix,
llvm::cl::desc("Undefine the specified macro"));
static llvm::cl::list<std::string>
ImplicitIncludes("include", llvm::cl::value_desc("file"),
llvm::cl::desc("Include file before parsing"));
// Append a #define line to Buf for Macro. Macro should be of the form XXX,
// in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit
// "#define XXX Y z W". To get a #define with no value, use "XXX=".
static void DefineBuiltinMacro(std::vector<char> &Buf, const char *Macro,
const char *Command = "#define ") {
Buf.insert(Buf.end(), Command, Command+strlen(Command));
if (const char *Equal = strchr(Macro, '=')) {
// Turn the = into ' '.
Buf.insert(Buf.end(), Macro, Equal);
Buf.push_back(' ');
Buf.insert(Buf.end(), Equal+1, Equal+strlen(Equal));
} else {
// Push "macroname 1".
Buf.insert(Buf.end(), Macro, Macro+strlen(Macro));
Buf.push_back(' ');
Buf.push_back('1');
}
Buf.push_back('\n');
}
/// AddImplicitInclude - Add an implicit #include of the specified file to the
/// predefines buffer.
static void AddImplicitInclude(std::vector<char> &Buf, const std::string &File){
const char *Inc = "#include \"";
Buf.insert(Buf.end(), Inc, Inc+strlen(Inc));
Buf.insert(Buf.end(), File.begin(), File.end());
Buf.push_back('"');
Buf.push_back('\n');
}
/// InitializePreprocessor - Initialize the preprocessor getting it and the
/// environment ready to process a single file. This returns true on error.
///
static bool InitializePreprocessor(Preprocessor &PP,
bool InitializeSourceMgr,
const std::string &InFile) {
FileManager &FileMgr = PP.getFileManager();
// Figure out where to get and map in the main file.
SourceManager &SourceMgr = PP.getSourceManager();
if (InitializeSourceMgr) {
if (InFile != "-") {
const FileEntry *File = FileMgr.getFile(InFile);
if (File) SourceMgr.createMainFileID(File, SourceLocation());
if (SourceMgr.getMainFileID() == 0) {
fprintf(stderr, "Error reading '%s'!\n",InFile.c_str());
return true;
}
} else {
llvm::MemoryBuffer *SB = llvm::MemoryBuffer::getSTDIN();
if (SB) SourceMgr.createMainFileIDForMemBuffer(SB);
if (SourceMgr.getMainFileID() == 0) {
fprintf(stderr, "Error reading standard input! Empty?\n");
return true;
}
}
}
std::vector<char> PredefineBuffer;
// Add macros from the command line.
unsigned d = 0, D = D_macros.size();
unsigned u = 0, U = U_macros.size();
while (d < D || u < U) {
if (u == U || (d < D && D_macros.getPosition(d) < U_macros.getPosition(u)))
DefineBuiltinMacro(PredefineBuffer, D_macros[d++].c_str());
else
DefineBuiltinMacro(PredefineBuffer, U_macros[u++].c_str(), "#undef ");
}
// FIXME: Read any files specified by -imacros.
// Add implicit #includes from -include.
for (unsigned i = 0, e = ImplicitIncludes.size(); i != e; ++i)
AddImplicitInclude(PredefineBuffer, ImplicitIncludes[i]);
// Null terminate PredefinedBuffer and add it.
PredefineBuffer.push_back(0);
PP.setPredefines(&PredefineBuffer[0]);
// Once we've read this, we're done.
return false;
}
//===----------------------------------------------------------------------===//
// Preprocessor include path information.
//===----------------------------------------------------------------------===//
// This tool exports a large number of command line options to control how the
// preprocessor searches for header files. At root, however, the Preprocessor
// object takes a very simple interface: a list of directories to search for
//
// FIXME: -nostdinc,-nostdinc++
// FIXME: -imultilib
//
// FIXME: -imacros
static llvm::cl::opt<bool>
nostdinc("nostdinc", llvm::cl::desc("Disable standard #include directories"));
// Various command line options. These four add directories to each chain.
static llvm::cl::list<std::string>
F_dirs("F", llvm::cl::value_desc("directory"), llvm::cl::Prefix,
llvm::cl::desc("Add directory to framework include search path"));
static llvm::cl::list<std::string>
I_dirs("I", llvm::cl::value_desc("directory"), llvm::cl::Prefix,
llvm::cl::desc("Add directory to include search path"));
static llvm::cl::list<std::string>
idirafter_dirs("idirafter", llvm::cl::value_desc("directory"), llvm::cl::Prefix,
llvm::cl::desc("Add directory to AFTER include search path"));
static llvm::cl::list<std::string>
iquote_dirs("iquote", llvm::cl::value_desc("directory"), llvm::cl::Prefix,
llvm::cl::desc("Add directory to QUOTE include search path"));
static llvm::cl::list<std::string>
isystem_dirs("isystem", llvm::cl::value_desc("directory"), llvm::cl::Prefix,
llvm::cl::desc("Add directory to SYSTEM include search path"));
// These handle -iprefix/-iwithprefix/-iwithprefixbefore.
static llvm::cl::list<std::string>
iprefix_vals("iprefix", llvm::cl::value_desc("prefix"), llvm::cl::Prefix,
llvm::cl::desc("Set the -iwithprefix/-iwithprefixbefore prefix"));
static llvm::cl::list<std::string>
iwithprefix_vals("iwithprefix", llvm::cl::value_desc("dir"), llvm::cl::Prefix,
llvm::cl::desc("Set directory to SYSTEM include search path with prefix"));
static llvm::cl::list<std::string>
iwithprefixbefore_vals("iwithprefixbefore", llvm::cl::value_desc("dir"),
llvm::cl::Prefix,
llvm::cl::desc("Set directory to include search path with prefix"));
static llvm::cl::opt<std::string>
isysroot("isysroot", llvm::cl::value_desc("dir"), llvm::cl::init("/"),
llvm::cl::desc("Set the system root directory (usually /)"));
// Finally, implement the code that groks the options above.
/// InitializeIncludePaths - Process the -I options and set them in the
/// HeaderSearch object.
void InitializeIncludePaths(const char *Argv0, HeaderSearch &Headers,
FileManager &FM, const LangOptions &Lang) {
InitHeaderSearch Init(Headers, Verbose, isysroot);
// Handle -I... and -F... options, walking the lists in parallel.
unsigned Iidx = 0, Fidx = 0;
while (Iidx < I_dirs.size() && Fidx < F_dirs.size()) {
if (I_dirs.getPosition(Iidx) < F_dirs.getPosition(Fidx)) {
Init.AddPath(I_dirs[Iidx], InitHeaderSearch::Angled, false, true, false);
++Iidx;
} else {
Init.AddPath(F_dirs[Fidx], InitHeaderSearch::Angled, false, true, true);
++Fidx;
}
}
// Consume what's left from whatever list was longer.
for (; Iidx != I_dirs.size(); ++Iidx)
Init.AddPath(I_dirs[Iidx], InitHeaderSearch::Angled, false, true, false);
for (; Fidx != F_dirs.size(); ++Fidx)
Init.AddPath(F_dirs[Fidx], InitHeaderSearch::Angled, false, true, true);
// Handle -idirafter... options.
for (unsigned i = 0, e = idirafter_dirs.size(); i != e; ++i)
Init.AddPath(idirafter_dirs[i], InitHeaderSearch::After,
false, true, false);
// Handle -iquote... options.
for (unsigned i = 0, e = iquote_dirs.size(); i != e; ++i)
Init.AddPath(iquote_dirs[i], InitHeaderSearch::Quoted, false, true, false);
// Handle -isystem... options.
for (unsigned i = 0, e = isystem_dirs.size(); i != e; ++i)
Init.AddPath(isystem_dirs[i], InitHeaderSearch::System, false, true, false);
// Walk the -iprefix/-iwithprefix/-iwithprefixbefore argument lists in
// parallel, processing the values in order of occurance to get the right
// prefixes.
{
std::string Prefix = ""; // FIXME: this isn't the correct default prefix.
unsigned iprefix_idx = 0;
unsigned iwithprefix_idx = 0;
unsigned iwithprefixbefore_idx = 0;
bool iprefix_done = iprefix_vals.empty();
bool iwithprefix_done = iwithprefix_vals.empty();
bool iwithprefixbefore_done = iwithprefixbefore_vals.empty();
while (!iprefix_done || !iwithprefix_done || !iwithprefixbefore_done) {
if (!iprefix_done &&
(iwithprefix_done ||
iprefix_vals.getPosition(iprefix_idx) <
iwithprefix_vals.getPosition(iwithprefix_idx)) &&
(iwithprefixbefore_done ||
iprefix_vals.getPosition(iprefix_idx) <
iwithprefixbefore_vals.getPosition(iwithprefixbefore_idx))) {
Prefix = iprefix_vals[iprefix_idx];
++iprefix_idx;
iprefix_done = iprefix_idx == iprefix_vals.size();
} else if (!iwithprefix_done &&
(iwithprefixbefore_done ||
iwithprefix_vals.getPosition(iwithprefix_idx) <
iwithprefixbefore_vals.getPosition(iwithprefixbefore_idx))) {
Init.AddPath(Prefix+iwithprefix_vals[iwithprefix_idx],
InitHeaderSearch::System, false, false, false);
++iwithprefix_idx;
iwithprefix_done = iwithprefix_idx == iwithprefix_vals.size();
} else {
Init.AddPath(Prefix+iwithprefixbefore_vals[iwithprefixbefore_idx],
InitHeaderSearch::Angled, false, false, false);
++iwithprefixbefore_idx;
iwithprefixbefore_done =
iwithprefixbefore_idx == iwithprefixbefore_vals.size();
}
}
}
Init.AddDefaultEnvVarPaths(Lang);
// Add the clang headers, which are relative to the clang driver.
llvm::sys::Path MainExecutablePath =
llvm::sys::Path::GetMainExecutable(Argv0,
(void*)(intptr_t)InitializeIncludePaths);
if (!MainExecutablePath.isEmpty()) {
MainExecutablePath.eraseComponent(); // Remove /clang from foo/bin/clang
MainExecutablePath.eraseComponent(); // Remove /bin from foo/bin
MainExecutablePath.appendComponent("Headers"); // Get foo/Headers
Init.AddPath(MainExecutablePath.c_str(), InitHeaderSearch::System,
false, false, false);
}
if (!nostdinc)
Init.AddDefaultSystemIncludePaths(Lang);
// Now that we have collected all of the include paths, merge them all
// together and tell the preprocessor about them.
Init.Realize();
}
//===----------------------------------------------------------------------===//
// Driver PreprocessorFactory - For lazily generating preprocessors ...
//===----------------------------------------------------------------------===//
namespace {
class VISIBILITY_HIDDEN DriverPreprocessorFactory : public PreprocessorFactory {
const std::string &InFile;
Diagnostic &Diags;
const LangOptions &LangInfo;
TargetInfo &Target;
SourceManager &SourceMgr;
HeaderSearch &HeaderInfo;
bool InitializeSourceMgr;
public:
DriverPreprocessorFactory(const std::string &infile,
Diagnostic &diags, const LangOptions &opts,
TargetInfo &target, SourceManager &SM,
HeaderSearch &Headers)
: InFile(infile), Diags(diags), LangInfo(opts), Target(target),
SourceMgr(SM), HeaderInfo(Headers), InitializeSourceMgr(true) {}
virtual ~DriverPreprocessorFactory() {}
virtual Preprocessor* CreatePreprocessor() {
Preprocessor* PP = new Preprocessor(Diags, LangInfo, Target,
SourceMgr, HeaderInfo);
if (InitializePreprocessor(*PP, InitializeSourceMgr, InFile)) {
delete PP;
return NULL;
}
InitializeSourceMgr = false;
return PP;
}
};
}
//===----------------------------------------------------------------------===//
// Basic Parser driver
//===----------------------------------------------------------------------===//
static void ParseFile(Preprocessor &PP, MinimalAction *PA) {
Parser P(PP, *PA);
PP.EnterMainSourceFile();
// Parsing the specified input file.
P.ParseTranslationUnit();
delete PA;
if (VerifyDiagnostics)
exit(CheckDiagnostics(PP));
}
//===----------------------------------------------------------------------===//
// Main driver
//===----------------------------------------------------------------------===//
/// CreateASTConsumer - Create the ASTConsumer for the corresponding program
/// action. These consumers can operate on both ASTs that are freshly
/// parsed from source files as well as those deserialized from Bitcode.
static ASTConsumer* CreateASTConsumer(const std::string& InFile,
Diagnostic& Diag, FileManager& FileMgr,
const LangOptions& LangOpts,
Preprocessor *PP,
PreprocessorFactory *PPF) {
switch (ProgAction) {
default:
return NULL;
case ASTPrint:
return CreateASTPrinter();
case ASTDump:
return CreateASTDumper();
case ASTView:
return CreateASTViewer();
case EmitHTML:
return CreateHTMLPrinter(OutputFile, Diag, PP, PPF);
case TestSerialization:
return CreateSerializationTest(Diag, FileMgr);
case EmitLLVM:
case EmitBC:
return CreateLLVMCodeGenWriter(ProgAction == EmitBC, Diag, LangOpts,
InFile, OutputFile, GenerateDebugInfo);
case SerializeAST:
// FIXME: Allow user to tailor where the file is written.
return CreateASTSerializer(InFile, OutputFile, Diag);
case RewriteObjC:
return CreateCodeRewriterTest(InFile, OutputFile, Diag, LangOpts);
case RewriteBlocks:
return CreateBlockRewriter(InFile, OutputFile, Diag, LangOpts);
case RunAnalysis:
assert (!AnalysisList.empty());
return CreateAnalysisConsumer(&AnalysisList[0],
&AnalysisList[0]+AnalysisList.size(),
Diag, PP, PPF, LangOpts,
AnalyzeSpecificFunction,
OutputFile, VisualizeEGDot, VisualizeEGUbi,
TrimGraph, AnalyzeAll);
}
}
/// ProcessInputFile - Process a single input file with the specified state.
///
static void ProcessInputFile(Preprocessor &PP, PreprocessorFactory &PPF,
const std::string &InFile) {
llvm::OwningPtr<ASTConsumer> Consumer;
bool ClearSourceMgr = false;
switch (ProgAction) {
default:
Consumer.reset(CreateASTConsumer(InFile, PP.getDiagnostics(),
PP.getFileManager(), PP.getLangOptions(),
&PP, &PPF));
if (!Consumer) {
fprintf(stderr, "Unexpected program action!\n");
return;
}
break;
case DumpTokens: { // Token dump mode.
Token Tok;
// Start parsing the specified input file.
PP.EnterMainSourceFile();
do {
PP.Lex(Tok);
PP.DumpToken(Tok, true);
fprintf(stderr, "\n");
} while (Tok.isNot(tok::eof));
ClearSourceMgr = true;
break;
}
case RunPreprocessorOnly: { // Just lex as fast as we can, no output.
Token Tok;
// Start parsing the specified input file.
PP.EnterMainSourceFile();
do {
PP.Lex(Tok);
} while (Tok.isNot(tok::eof));
ClearSourceMgr = true;
break;
}
case PrintPreprocessedInput: // -E mode.
DoPrintPreprocessedInput(PP, OutputFile);
ClearSourceMgr = true;
break;
case ParseNoop: // -parse-noop
ParseFile(PP, new MinimalAction(PP.getIdentifierTable()));
ClearSourceMgr = true;
break;
case ParsePrintCallbacks:
ParseFile(PP, CreatePrintParserActionsAction(PP.getIdentifierTable()));
ClearSourceMgr = true;
break;
case ParseSyntaxOnly: // -fsyntax-only
Consumer.reset(new ASTConsumer());
break;
case RewriteMacros:
RewriteMacrosInInput(PP, InFile, OutputFile);
ClearSourceMgr = true;
break;
}
if (Consumer) {
if (VerifyDiagnostics)
exit(CheckASTConsumer(PP, Consumer.get()));
ParseAST(PP, Consumer.get(), Stats);
}
if (Stats) {
fprintf(stderr, "\nSTATISTICS FOR '%s':\n", InFile.c_str());
PP.PrintStats();
PP.getIdentifierTable().PrintStats();
PP.getHeaderSearchInfo().PrintStats();
if (ClearSourceMgr)
PP.getSourceManager().PrintStats();
fprintf(stderr, "\n");
}
// For a multi-file compilation, some things are ok with nuking the source
// manager tables, other require stable fileid/macroid's across multiple
// files.
if (ClearSourceMgr)
PP.getSourceManager().clearIDTables();
}
static void ProcessSerializedFile(const std::string& InFile, Diagnostic& Diag,
FileManager& FileMgr) {
if (VerifyDiagnostics) {
fprintf(stderr, "-verify does not yet work with serialized ASTs.\n");
exit (1);
}
llvm::sys::Path Filename(InFile);
if (!Filename.isValid()) {
fprintf(stderr, "serialized file '%s' not available.\n",InFile.c_str());
exit (1);
}
llvm::OwningPtr<TranslationUnit> TU(ReadASTBitcodeFile(Filename, FileMgr));
if (!TU) {
fprintf(stderr, "error: file '%s' could not be deserialized\n",
InFile.c_str());
exit (1);
}
// Observe that we use the source file name stored in the deserialized
// translation unit, rather than InFile.
llvm::OwningPtr<ASTConsumer>
Consumer(CreateASTConsumer(InFile, Diag, FileMgr, TU->getLangOptions(),
0, 0));
if (!Consumer) {
fprintf(stderr, "Unsupported program action with serialized ASTs!\n");
exit (1);
}
Consumer->Initialize(TU->getContext());
// FIXME: We need to inform Consumer about completed TagDecls as well.
for (TranslationUnit::iterator I=TU->begin(), E=TU->end(); I!=E; ++I)
Consumer->HandleTopLevelDecl(*I);
}
static llvm::cl::list<std::string>
InputFilenames(llvm::cl::Positional, llvm::cl::desc("<input files>"));
static bool isSerializedFile(const std::string& InFile) {
if (InFile.size() < 4)
return false;
const char* s = InFile.c_str()+InFile.size()-4;
return s[0] == '.' &&
s[1] == 'a' &&
s[2] == 's' &&
s[3] == 't';
}
int main(int argc, char **argv) {
llvm::cl::ParseCommandLineOptions(argc, argv, " llvm clang cfe\n");
llvm::sys::PrintStackTraceOnErrorSignal();
// If no input was specified, read from stdin.
if (InputFilenames.empty())
InputFilenames.push_back("-");
// Create a file manager object to provide access to and cache the filesystem.
FileManager FileMgr;
// Create the diagnostic client for reporting errors or for
// implementing -verify.
DiagnosticClient* TextDiagClient = 0;
if (!VerifyDiagnostics) {
// Print diagnostics to stderr by default.
TextDiagClient = new TextDiagnosticPrinter(!NoShowColumn,
!NoCaretDiagnostics);
} else {
// When checking diagnostics, just buffer them up.
TextDiagClient = new TextDiagnosticBuffer();
if (InputFilenames.size() != 1) {
fprintf(stderr,
"-verify only works on single input files for now.\n");
return 1;
}
}
// Configure our handling of diagnostics.
llvm::OwningPtr<DiagnosticClient> DiagClient(TextDiagClient);
Diagnostic Diags(DiagClient.get());
InitializeDiagnostics(Diags);
// -I- is a deprecated GCC feature, scan for it and reject it.
for (unsigned i = 0, e = I_dirs.size(); i != e; ++i) {
if (I_dirs[i] == "-") {
Diags.Report(diag::err_pp_I_dash_not_supported);
I_dirs.erase(I_dirs.begin()+i);
--i;
}
}
// Get information about the target being compiled for.
std::string Triple = CreateTargetTriple();
llvm::OwningPtr<TargetInfo> Target(TargetInfo::CreateTargetInfo(Triple));
if (Target == 0) {
fprintf(stderr, "Sorry, I don't know what target this is: %s\n",
Triple.c_str());
fprintf(stderr, "Please use -triple or -arch.\n");
exit(1);
}
// Are we invoking one or more source analyses?
if (!AnalysisList.empty() && ProgAction == ParseSyntaxOnly)
ProgAction = RunAnalysis;
llvm::OwningPtr<SourceManager> SourceMgr;
for (unsigned i = 0, e = InputFilenames.size(); i != e; ++i) {
const std::string &InFile = InputFilenames[i];
if (isSerializedFile(InFile)) {
Diags.setClient(TextDiagClient);
ProcessSerializedFile(InFile,Diags,FileMgr);
}
else {
/// Create a SourceManager object. This tracks and owns all the file
/// buffers allocated to a translation unit.
if (!SourceMgr)
SourceMgr.reset(new SourceManager());
else
SourceMgr->clearIDTables();
// Initialize language options, inferring file types from input filenames.
LangOptions LangInfo;
InitializeBaseLanguage();
LangKind LK = GetLanguage(InFile);
InitializeLangOptions(LangInfo, LK);
InitializeLanguageStandard(LangInfo, LK, Target.get());
InitializeGCMode(LangInfo);
// Process the -I options and set them in the HeaderInfo.
HeaderSearch HeaderInfo(FileMgr);
InitializeIncludePaths(argv[0], HeaderInfo, FileMgr, LangInfo);
// Set up the preprocessor with these options.
DriverPreprocessorFactory PPFactory(InFile, Diags, LangInfo, *Target,
*SourceMgr.get(), HeaderInfo);
llvm::OwningPtr<Preprocessor> PP(PPFactory.CreatePreprocessor());
if (!PP)
continue;
// Create the HTMLDiagnosticsClient if we are using one. Otherwise,
// always reset to using TextDiagClient.
llvm::OwningPtr<DiagnosticClient> TmpClient;
if (!HTMLDiag.empty()) {
TmpClient.reset(CreateHTMLDiagnosticClient(HTMLDiag, PP.get(),
&PPFactory));
Diags.setClient(TmpClient.get());
}
else
Diags.setClient(TextDiagClient);
// Process the source file.
ProcessInputFile(*PP, PPFactory, InFile);
HeaderInfo.ClearFileInfo();
if (Stats)
SourceMgr->PrintStats();
}
}
if (unsigned NumDiagnostics = Diags.getNumDiagnostics())
fprintf(stderr, "%d diagnostic%s generated.\n", NumDiagnostics,
(NumDiagnostics == 1 ? "" : "s"));
if (Stats) {
FileMgr.PrintStats();
fprintf(stderr, "\n");
}
return Diags.getNumErrors() != 0;
}
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