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07adb2836b
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17498 91177308-0d34-0410-b5e6-96231b3b80d8
507 lines
15 KiB
C++
507 lines
15 KiB
C++
//===- Configuration.cpp - Configuration Data Mgmt --------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by Reid Spencer and is distributed under the
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// University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the parsing of configuration files for the LLVM Compiler
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// Driver (llvmc).
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//
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//===------------------------------------------------------------------------===
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#include "Configuration.h"
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#include "ConfigLexer.h"
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#include "CompilerDriver.h"
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#include "llvm/Config/config.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/ADT/StringExtras.h"
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#include <iostream>
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#include <fstream>
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using namespace llvm;
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namespace sys {
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// From CompilerDriver.cpp (for now)
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extern bool FileIsReadable(const std::string& fname);
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}
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namespace llvm {
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ConfigLexerInfo ConfigLexerState;
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InputProvider* ConfigLexerInput = 0;
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InputProvider::~InputProvider() {}
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void InputProvider::error(const std::string& msg) {
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std::cerr << name << ":" << ConfigLexerState.lineNum << ": Error: " <<
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msg << "\n";
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errCount++;
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}
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void InputProvider::checkErrors() {
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if (errCount > 0) {
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std::cerr << name << " had " << errCount << " errors. Terminating.\n";
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exit(errCount);
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}
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}
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}
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namespace {
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class FileInputProvider : public InputProvider {
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public:
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FileInputProvider(const std::string & fname)
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: InputProvider(fname)
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, F(fname.c_str()) {
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ConfigLexerInput = this;
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}
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virtual ~FileInputProvider() { F.close(); ConfigLexerInput = 0; }
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virtual unsigned read(char *buffer, unsigned max_size) {
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if (F.good()) {
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F.read(buffer,max_size);
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if ( F.gcount() ) return F.gcount() - 1;
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}
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return 0;
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}
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bool okay() { return F.good(); }
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private:
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std::ifstream F;
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};
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cl::opt<bool> DumpTokens("dump-tokens", cl::Optional, cl::Hidden,
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cl::init(false), cl::desc("Dump lexical tokens (debug use only)."));
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struct Parser
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{
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Parser() {
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token = EOFTOK;
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provider = 0;
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confDat = 0;
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ConfigLexerState.lineNum = 1;
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ConfigLexerState.in_value = false;
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ConfigLexerState.StringVal.clear();
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ConfigLexerState.IntegerVal = 0;
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};
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ConfigLexerTokens token;
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InputProvider* provider;
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CompilerDriver::ConfigData* confDat;
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inline int next() {
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token = Configlex();
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if (DumpTokens)
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std::cerr << token << "\n";
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return token;
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}
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inline bool next_is_real() {
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next();
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return (token != EOLTOK) && (token != ERRORTOK) && (token != 0);
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}
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inline void eatLineRemnant() {
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while (next_is_real()) ;
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}
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void error(const std::string& msg, bool skip = true) {
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provider->error(msg);
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if (skip)
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eatLineRemnant();
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}
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std::string parseName() {
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std::string result;
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if (next() == EQUALS) {
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while (next_is_real()) {
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switch (token ) {
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case STRING :
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case OPTION :
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result += ConfigLexerState.StringVal + " ";
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break;
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default:
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error("Invalid name");
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break;
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}
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}
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if (result.empty())
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error("Name exepected");
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else
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result.erase(result.size()-1,1);
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} else
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error("= expected");
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return result;
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}
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bool parseBoolean() {
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bool result = true;
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if (next() == EQUALS) {
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if (next() == FALSETOK) {
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result = false;
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} else if (token != TRUETOK) {
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error("Expecting boolean value");
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return false;
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}
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if (next() != EOLTOK && token != 0) {
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error("Extraneous tokens after boolean");
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}
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}
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else
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error("Expecting '='");
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return result;
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}
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bool parseSubstitution(CompilerDriver::StringVector& optList) {
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switch (token) {
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case ARGS_SUBST: optList.push_back("%args%"); break;
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case DEFS_SUBST: optList.push_back("%defs%"); break;
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case IN_SUBST: optList.push_back("%in%"); break;
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case INCLS_SUBST: optList.push_back("%incls%"); break;
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case LIBS_SUBST: optList.push_back("%libs%"); break;
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case OPT_SUBST: optList.push_back("%opt%"); break;
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case OUT_SUBST: optList.push_back("%out%"); break;
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case TARGET_SUBST: optList.push_back("%target%"); break;
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case STATS_SUBST: optList.push_back("%stats%"); break;
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case TIME_SUBST: optList.push_back("%time%"); break;
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case VERBOSE_SUBST: optList.push_back("%verbose%"); break;
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default:
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return false;
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}
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return true;
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}
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void parseOptionList(CompilerDriver::StringVector& optList ) {
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if (next() == EQUALS) {
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while (next_is_real()) {
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if (token == STRING || token == OPTION)
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optList.push_back(ConfigLexerState.StringVal);
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else if (!parseSubstitution(optList)) {
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error("Expecting a program argument or substitution", false);
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break;
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}
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}
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} else
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error("Expecting '='");
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}
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void parseVersion() {
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if (next() == EQUALS) {
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while (next_is_real()) {
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if (token == STRING || token == OPTION)
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confDat->version = ConfigLexerState.StringVal;
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else
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error("Expecting a version string");
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}
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} else
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error("Expecting '='");
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}
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void parseLang() {
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switch (next() ) {
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case NAME:
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confDat->langName = parseName();
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break;
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case OPT1:
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parseOptionList(confDat->opts[CompilerDriver::OPT_FAST_COMPILE]);
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break;
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case OPT2:
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parseOptionList(confDat->opts[CompilerDriver::OPT_SIMPLE]);
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break;
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case OPT3:
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parseOptionList(confDat->opts[CompilerDriver::OPT_AGGRESSIVE]);
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break;
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case OPT4:
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parseOptionList(confDat->opts[CompilerDriver::OPT_LINK_TIME]);
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break;
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case OPT5:
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parseOptionList(
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confDat->opts[CompilerDriver::OPT_AGGRESSIVE_LINK_TIME]);
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break;
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default:
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error("Expecting 'name' or 'optN' after 'lang.'");
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break;
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}
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}
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void parseCommand(CompilerDriver::Action& action) {
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if (next() == EQUALS) {
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if (next() == EOLTOK) {
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// no value (valid)
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action.program.clear();
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action.args.clear();
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} else {
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if (token == STRING || token == OPTION) {
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action.program.setFile(ConfigLexerState.StringVal);
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} else {
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error("Expecting a program name");
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}
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while (next_is_real()) {
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if (token == STRING || token == OPTION) {
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action.args.push_back(ConfigLexerState.StringVal);
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} else if (!parseSubstitution(action.args)) {
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error("Expecting a program argument or substitution", false);
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break;
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}
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}
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}
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}
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}
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void parsePreprocessor() {
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switch (next()) {
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case COMMAND:
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parseCommand(confDat->PreProcessor);
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break;
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case REQUIRED:
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if (parseBoolean())
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confDat->PreProcessor.set(CompilerDriver::REQUIRED_FLAG);
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else
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confDat->PreProcessor.clear(CompilerDriver::REQUIRED_FLAG);
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break;
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default:
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error("Expecting 'command' or 'required' but found '" +
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ConfigLexerState.StringVal);
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break;
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}
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}
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bool parseOutputFlag() {
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if (next() == EQUALS) {
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if (next() == ASSEMBLY) {
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return true;
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} else if (token == BYTECODE) {
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return false;
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} else {
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error("Expecting output type value");
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return false;
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}
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if (next() != EOLTOK && token != 0) {
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error("Extraneous tokens after output value");
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}
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}
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else
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error("Expecting '='");
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return false;
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}
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void parseTranslator() {
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switch (next()) {
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case COMMAND:
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parseCommand(confDat->Translator);
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break;
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case REQUIRED:
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if (parseBoolean())
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confDat->Translator.set(CompilerDriver::REQUIRED_FLAG);
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else
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confDat->Translator.clear(CompilerDriver::REQUIRED_FLAG);
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break;
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case PREPROCESSES:
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if (parseBoolean())
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confDat->Translator.set(CompilerDriver::PREPROCESSES_FLAG);
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else
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confDat->Translator.clear(CompilerDriver::PREPROCESSES_FLAG);
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break;
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case OUTPUT:
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if (parseOutputFlag())
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confDat->Translator.set(CompilerDriver::OUTPUT_IS_ASM_FLAG);
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else
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confDat->Translator.clear(CompilerDriver::OUTPUT_IS_ASM_FLAG);
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break;
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default:
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error("Expecting 'command', 'required', 'preprocesses', or "
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"'output' but found '" + ConfigLexerState.StringVal +
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"' instead");
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break;
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}
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}
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void parseOptimizer() {
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switch (next()) {
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case COMMAND:
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parseCommand(confDat->Optimizer);
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break;
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case PREPROCESSES:
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if (parseBoolean())
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confDat->Optimizer.set(CompilerDriver::PREPROCESSES_FLAG);
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else
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confDat->Optimizer.clear(CompilerDriver::PREPROCESSES_FLAG);
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break;
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case TRANSLATES:
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if (parseBoolean())
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confDat->Optimizer.set(CompilerDriver::TRANSLATES_FLAG);
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else
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confDat->Optimizer.clear(CompilerDriver::TRANSLATES_FLAG);
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break;
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case REQUIRED:
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if (parseBoolean())
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confDat->Optimizer.set(CompilerDriver::REQUIRED_FLAG);
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else
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confDat->Optimizer.clear(CompilerDriver::REQUIRED_FLAG);
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break;
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case OUTPUT:
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if (parseOutputFlag())
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confDat->Translator.set(CompilerDriver::OUTPUT_IS_ASM_FLAG);
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else
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confDat->Translator.clear(CompilerDriver::OUTPUT_IS_ASM_FLAG);
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break;
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default:
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error(std::string("Expecting 'command', 'preprocesses', "
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"'translates' or 'output' but found '") +
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ConfigLexerState.StringVal + "' instead");
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break;
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}
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}
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void parseAssembler() {
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switch(next()) {
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case COMMAND:
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parseCommand(confDat->Assembler);
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break;
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default:
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error("Expecting 'command'");
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break;
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}
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}
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void parseLinker() {
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switch(next()) {
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case LIBS:
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break; //FIXME
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case LIBPATHS:
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break; //FIXME
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default:
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error("Expecting 'libs' or 'libpaths'");
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break;
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}
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}
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void parseAssignment() {
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switch (token) {
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case VERSION_TOK: parseVersion(); break;
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case LANG: parseLang(); break;
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case PREPROCESSOR: parsePreprocessor(); break;
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case TRANSLATOR: parseTranslator(); break;
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case OPTIMIZER: parseOptimizer(); break;
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case ASSEMBLER: parseAssembler(); break;
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case LINKER: parseLinker(); break;
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case EOLTOK: break; // just ignore
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case ERRORTOK:
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default:
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error("Invalid top level configuration item");
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break;
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}
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}
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void parseFile() {
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while ( next() != EOFTOK ) {
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if (token == ERRORTOK)
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error("Invalid token");
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else if (token != EOLTOK)
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parseAssignment();
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}
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provider->checkErrors();
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}
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};
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void
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ParseConfigData(InputProvider& provider, CompilerDriver::ConfigData& confDat) {
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Parser p;
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p.token = EOFTOK;
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p.provider = &provider;
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p.confDat = &confDat;
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p.parseFile();
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}
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}
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CompilerDriver::ConfigData*
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LLVMC_ConfigDataProvider::ReadConfigData(const std::string& ftype) {
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CompilerDriver::ConfigData* result = 0;
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sys::Path confFile;
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if (configDir.isEmpty()) {
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// Try the environment variable
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const char* conf = getenv("LLVM_CONFIG_DIR");
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if (conf) {
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confFile.setDirectory(conf);
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confFile.appendFile(ftype);
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if (!confFile.readable())
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throw std::string("Configuration file for '") + ftype +
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"' is not available.";
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} else {
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// Try the user's home directory
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confFile = sys::Path::GetUserHomeDirectory();
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if (!confFile.isEmpty()) {
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confFile.appendDirectory(".llvm");
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confFile.appendDirectory("etc");
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confFile.appendFile(ftype);
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if (!confFile.readable())
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confFile.clear();
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}
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if (!confFile.isEmpty()) {
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// Okay, try the LLVM installation directory
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confFile = sys::Path::GetLLVMConfigDir();
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confFile.appendFile(ftype);
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if (!confFile.readable()) {
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// Okay, try the "standard" place
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confFile = sys::Path::GetLLVMDefaultConfigDir();
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confFile.appendFile(ftype);
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if (!confFile.readable()) {
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throw std::string("Configuration file for '") + ftype +
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"' is not available.";
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}
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}
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}
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}
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} else {
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confFile = configDir;
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confFile.appendFile(ftype);
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if (!confFile.readable())
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throw std::string("Configuration file for '") + ftype +
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"' is not available.";
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}
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FileInputProvider fip( confFile.get() );
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if (!fip.okay()) {
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throw std::string("Configuration file for '") + ftype +
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"' is not available.";
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}
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result = new CompilerDriver::ConfigData();
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ParseConfigData(fip,*result);
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return result;
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}
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LLVMC_ConfigDataProvider::~LLVMC_ConfigDataProvider()
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{
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ConfigDataMap::iterator cIt = Configurations.begin();
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while (cIt != Configurations.end()) {
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CompilerDriver::ConfigData* cd = cIt->second;
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++cIt;
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delete cd;
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}
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Configurations.clear();
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}
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CompilerDriver::ConfigData*
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LLVMC_ConfigDataProvider::ProvideConfigData(const std::string& filetype) {
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CompilerDriver::ConfigData* result = 0;
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if (!Configurations.empty()) {
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ConfigDataMap::iterator cIt = Configurations.find(filetype);
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if ( cIt != Configurations.end() ) {
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// We found one in the case, return it.
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result = cIt->second;
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}
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}
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if (result == 0) {
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// The configuration data doesn't exist, we have to go read it.
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result = ReadConfigData(filetype);
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// If we got one, cache it
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if (result != 0)
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Configurations.insert(std::make_pair(filetype,result));
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}
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return result; // Might return 0
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}
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// vim: sw=2 smartindent smarttab tw=80 autoindent expandtab
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