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Don’t let an invalid PCH file stop an interactive session from running.

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This commit is contained in:
Frederich Munch 2017-01-29 18:16:31 -05:00 committed by sftnight
parent e245220dff
commit e14c39ace8
1 changed files with 38 additions and 15 deletions
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53
lib/Interpreter/CIFactory.cpp
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@ -599,10 +599,11 @@ static void stringifyPreprocSetting(PreprocessorOptions& PPOpts,
return Diags;
}
static bool SetupCompiler(CompilerInstance* CI, bool full) {
static bool
SetupCompiler(CompilerInstance* CI, bool Lang = true, bool Targ = true) {
// Set the language options, which cling needs.
// This may have already been done via a precompiled header
if (full)
if (Lang)
SetClingCustomLangOpts(CI->getLangOpts());
PreprocessorOptions& PPOpts = CI->getInvocation().getPreprocessorOpts();
@ -629,7 +630,7 @@ static void stringifyPreprocSetting(PreprocessorOptions& PPOpts,
CI->getTarget().adjust(CI->getLangOpts());
// This may have already been done via a precompiled header
if (full)
if (Targ)
SetClingTargetLangOpts(CI->getLangOpts(), CI->getTarget());
SetPreprocessorFromTarget(PPOpts, CI->getTarget().getTriple());
@ -780,7 +781,7 @@ static void stringifyPreprocSetting(PreprocessorOptions& PPOpts,
"output is supported.\n";
return nullptr;
}
if (!SetupCompiler(CI.get(), true))
if (!SetupCompiler(CI.get()))
return nullptr;
ProcessWarningOptions(*Diags, DiagOpts);
@ -789,28 +790,32 @@ static void stringifyPreprocSetting(PreprocessorOptions& PPOpts,
CI->createFileManager();
clang::CompilerInvocation& Invocation = CI->getInvocation();
std::string& PCHFileName
= Invocation.getPreprocessorOpts().ImplicitPCHInclude;
if (!PCHFileName.empty()) {
if (cling::utils::LookForFile(argvCompile, PCHFileName,
std::string& PCHFile = Invocation.getPreprocessorOpts().ImplicitPCHInclude;
bool InitLang = true, InitTarget = true;
if (!PCHFile.empty()) {
if (cling::utils::LookForFile(argvCompile, PCHFile,
&CI->getFileManager(),
COpts.Verbose ? "Precompiled header" : nullptr)) {
// Load target options etc from PCH.
struct PCHListener: public ASTReaderListener {
CompilerInvocation& m_Invocation;
bool m_ReadLang, m_ReadTarget;
PCHListener(CompilerInvocation& I): m_Invocation(I) {}
PCHListener(CompilerInvocation& I) :
m_Invocation(I), m_ReadLang(false), m_ReadTarget(false) {}
bool ReadLanguageOptions(const LangOptions &LangOpts,
bool /*Complain*/,
bool /*AllowCompatibleDifferences*/) override {
*m_Invocation.getLangOpts() = LangOpts;
m_ReadLang = true;
return false;
}
bool ReadTargetOptions(const TargetOptions &TargetOpts,
bool /*Complain*/,
bool /*AllowCompatibleDifferences*/) override {
m_Invocation.getTargetOpts() = TargetOpts;
m_ReadTarget = true;
return false;
}
bool ReadPreprocessorOptions(const PreprocessorOptions &PPOpts,
@ -825,18 +830,36 @@ static void stringifyPreprocSetting(PreprocessorOptions& PPOpts,
}
};
PCHListener listener(Invocation);
ASTReader::readASTFileControlBlock(PCHFileName,
CI->getFileManager(),
CI->getPCHContainerReader(),
false /*FindModuleFileExtensions*/,
listener);
if (ASTReader::readASTFileControlBlock(PCHFile,
CI->getFileManager(),
CI->getPCHContainerReader(),
false /*FindModuleFileExt*/,
listener)) {
// When running interactively pass on the info that the PCH
// has failed so that IncrmentalParser::Initialize won't try again.
if (!HasInput && llvm::sys::Process::StandardInIsUserInput()) {
const unsigned ID = Diags->getCustomDiagID(
clang::DiagnosticsEngine::Level::Error,
"Problems loading PCH: '%0'.");
Diags->Report(ID) << PCHFile;
// If this was the only error, then don't let it stop anything
if (Diags->getClient()->getNumErrors() == 1)
Diags->Reset(true);
// Clear the include so no one else uses it.
std::string().swap(PCHFile);
}
}
// All we care about is if Language and Target options were successful.
InitLang = !listener.m_ReadLang;
InitTarget = !listener.m_ReadTarget;
}
}
Invocation.getFrontendOpts().DisableFree = true;
// Set up compiler language and target
if (!SetupCompiler(CI.get(), PCHFileName.empty()))
if (!SetupCompiler(CI.get(), InitLang, InitTarget))
return nullptr;
// Set up source managers