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Daniel Dunbar41b5b172010-05-20 17:49:16 +00001//===-- cc1_main.cpp - Clang CC1 Compiler Frontend ------------------------===//
Daniel Dunbar217acbf2009-11-19 07:37:51 +00002//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
Daniel Dunbar21085772009-12-11 22:20:12 +000010// This is the entry point to the clang -cc1 functionality, which implements the
11// core compiler functionality along with a number of additional tools for
12// demonstration and testing purposes.
Daniel Dunbar217acbf2009-11-19 07:37:51 +000013//
14//===----------------------------------------------------------------------===//
15
Daniel Dunbar21085772009-12-11 22:20:12 +000016#include "clang/Driver/Arg.h"
17#include "clang/Driver/ArgList.h"
Daniel Dunbar21085772009-12-11 22:20:12 +000018#include "clang/Driver/DriverDiagnostic.h"
19#include "clang/Driver/OptTable.h"
Chandler Carruthf59edb92012-12-04 09:25:21 +000020#include "clang/Driver/Options.h"
Daniel Dunbar21085772009-12-11 22:20:12 +000021#include "clang/Frontend/CompilerInstance.h"
22#include "clang/Frontend/CompilerInvocation.h"
Daniel Dunbar21085772009-12-11 22:20:12 +000023#include "clang/Frontend/FrontendDiagnostic.h"
Daniel Dunbar21085772009-12-11 22:20:12 +000024#include "clang/Frontend/TextDiagnosticBuffer.h"
25#include "clang/Frontend/TextDiagnosticPrinter.h"
Peter Collingbourne1b7255d2010-08-24 00:31:22 +000026#include "clang/FrontendTool/Utils.h"
Douglas Gregor95dd5582010-03-30 17:33:59 +000027#include "llvm/ADT/Statistic.h"
Chandler Carruthf59edb92012-12-04 09:25:21 +000028#include "llvm/LinkAllPasses.h"
Daniel Dunbar21085772009-12-11 22:20:12 +000029#include "llvm/Support/ErrorHandling.h"
30#include "llvm/Support/ManagedStatic.h"
Chad Rosierb0afe832012-11-12 19:39:37 +000031#include "llvm/Support/Signals.h"
Evan Chenga6b40452011-08-24 18:09:14 +000032#include "llvm/Support/TargetSelect.h"
Chris Lattner30bc7e82010-03-30 05:39:52 +000033#include "llvm/Support/Timer.h"
Daniel Dunbar217acbf2009-11-19 07:37:51 +000034#include "llvm/Support/raw_ostream.h"
Daniel Dunbar21085772009-12-11 22:20:12 +000035#include <cstdio>
36using namespace clang;
Daniel Dunbar217acbf2009-11-19 07:37:51 +000037
Daniel Dunbar21085772009-12-11 22:20:12 +000038//===----------------------------------------------------------------------===//
39// Main driver
40//===----------------------------------------------------------------------===//
41
Chad Rosier90836282013-03-27 18:28:23 +000042static void LLVMErrorHandler(void *UserData, const std::string &Message,
43 bool GenCrashDiag) {
David Blaikied6471f72011-09-25 23:23:43 +000044 DiagnosticsEngine &Diags = *static_cast<DiagnosticsEngine*>(UserData);
Daniel Dunbar21085772009-12-11 22:20:12 +000045
46 Diags.Report(diag::err_fe_error_backend) << Message;
47
Chad Rosierb0afe832012-11-12 19:39:37 +000048 // Run the interrupt handlers to make sure any special cleanups get done, in
49 // particular that we remove files registered with RemoveFileOnSignal.
50 llvm::sys::RunInterruptHandlers();
51
Chad Rosier5af8de82012-11-12 21:32:24 +000052 // We cannot recover from llvm errors. When reporting a fatal error, exit
Chad Rosier90836282013-03-27 18:28:23 +000053 // with status 70 to generate crash diagnostics. For BSD systems this is
54 // defined as an internal software error. Otherwise, exit with status 1.
55 exit(GenCrashDiag ? 70 : 1);
Daniel Dunbar21085772009-12-11 22:20:12 +000056}
57
Daniel Dunbar21085772009-12-11 22:20:12 +000058int cc1_main(const char **ArgBegin, const char **ArgEnd,
59 const char *Argv0, void *MainAddr) {
Dylan Noblesmith1e4c01b2012-02-13 12:32:21 +000060 OwningPtr<CompilerInstance> Clang(new CompilerInstance());
Dylan Noblesmithc93dc782012-02-20 14:00:23 +000061 IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
Daniel Dunbar42e9f8e42010-02-16 01:54:47 +000062
Daniel Dunbar21085772009-12-11 22:20:12 +000063 // Initialize targets first, so that --version shows registered targets.
64 llvm::InitializeAllTargets();
Evan Chengd99d3e12011-07-22 21:59:11 +000065 llvm::InitializeAllTargetMCs();
Daniel Dunbar21085772009-12-11 22:20:12 +000066 llvm::InitializeAllAsmPrinters();
Chris Lattner01ae93f2010-04-05 23:33:20 +000067 llvm::InitializeAllAsmParsers();
Daniel Dunbar21085772009-12-11 22:20:12 +000068
69 // Buffer diagnostics from argument parsing so that we can output them using a
70 // well formed diagnostic object.
Douglas Gregor02c23eb2012-10-23 22:26:28 +000071 IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts = new DiagnosticOptions();
Douglas Gregorbdbb0042010-08-18 22:29:43 +000072 TextDiagnosticBuffer *DiagsBuffer = new TextDiagnosticBuffer;
Douglas Gregor02c23eb2012-10-23 22:26:28 +000073 DiagnosticsEngine Diags(DiagID, &*DiagOpts, DiagsBuffer);
Dylan Noblesmith8fdb6de2011-12-23 03:05:38 +000074 bool Success;
75 Success = CompilerInvocation::CreateFromArgs(Clang->getInvocation(),
76 ArgBegin, ArgEnd, Diags);
Daniel Dunbar1e69fe32009-12-13 03:45:58 +000077
78 // Infer the builtin include path if unspecified.
Daniel Dunbar42444fb2010-03-23 05:09:16 +000079 if (Clang->getHeaderSearchOpts().UseBuiltinIncludes &&
80 Clang->getHeaderSearchOpts().ResourceDir.empty())
81 Clang->getHeaderSearchOpts().ResourceDir =
Daniel Dunbar8b9adfe2009-12-15 00:06:45 +000082 CompilerInvocation::GetResourcesPath(Argv0, MainAddr);
Daniel Dunbar21085772009-12-11 22:20:12 +000083
Daniel Dunbara6bf47f2010-08-12 02:53:07 +000084 // Create the actual diagnostics engine.
Sean Silvad47afb92013-01-20 01:58:28 +000085 Clang->createDiagnostics();
Daniel Dunbara6bf47f2010-08-12 02:53:07 +000086 if (!Clang->hasDiagnostics())
87 return 1;
88
89 // Set an error handler, so that any LLVM backend diagnostics go through our
90 // error handler.
91 llvm::install_fatal_error_handler(LLVMErrorHandler,
92 static_cast<void*>(&Clang->getDiagnostics()));
93
Douglas Gregorbdbb0042010-08-18 22:29:43 +000094 DiagsBuffer->FlushDiagnostics(Clang->getDiagnostics());
Argyrios Kyrtzidisada4fa72012-01-25 20:00:43 +000095 if (!Success)
96 return 1;
Daniel Dunbara6bf47f2010-08-12 02:53:07 +000097
Daniel Dunbar8eb2b012010-08-12 02:53:12 +000098 // Execute the frontend actions.
Dylan Noblesmith8fdb6de2011-12-23 03:05:38 +000099 Success = ExecuteCompilerInvocation(Clang.get());
Daniel Dunbar42444fb2010-03-23 05:09:16 +0000100
Chris Lattner30bc7e82010-03-30 05:39:52 +0000101 // If any timers were active but haven't been destroyed yet, print their
102 // results now. This happens in -disable-free mode.
103 llvm::TimerGroup::printAll(llvm::errs());
Daniel Dunbarf56a4882010-08-02 15:31:28 +0000104
Dan Gohman726578c2010-08-18 21:23:17 +0000105 // Our error handler depends on the Diagnostics object, which we're
106 // potentially about to delete. Uninstall the handler now so that any
107 // later errors use the default handling behavior instead.
108 llvm::remove_fatal_error_handler();
109
Daniel Dunbar42444fb2010-03-23 05:09:16 +0000110 // When running with -disable-free, don't do any destruction or shutdown.
111 if (Clang->getFrontendOpts().DisableFree) {
Benjamin Kramer77d2c5f2011-02-27 18:07:41 +0000112 if (llvm::AreStatisticsEnabled() || Clang->getFrontendOpts().ShowStats)
Douglas Gregor95dd5582010-03-30 17:33:59 +0000113 llvm::PrintStatistics();
Daniel Dunbar42444fb2010-03-23 05:09:16 +0000114 Clang.take();
115 return !Success;
Daniel Dunbar21085772009-12-11 22:20:12 +0000116 }
117
Daniel Dunbar21085772009-12-11 22:20:12 +0000118 // Managed static deconstruction. Useful for making things like
119 // -time-passes usable.
120 llvm::llvm_shutdown();
121
Daniel Dunbar0397af22010-01-13 00:48:06 +0000122 return !Success;
Daniel Dunbar21085772009-12-11 22:20:12 +0000123}