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Ensure that all module build failures get diagnosed 

Otherwise we can end up silently skipping an import.  If we happen to be
building another module at the time, we may build a mysteriously broken
module and not know why it seems to be missing symbols.

llvm-svn: 218552
This commit is contained in:
Ben Langmuir 2014-09-26 22:42:23 +00:00
parent 2b91a7f80f
commit d213aab71d
2 changed files with 13 additions and 2 deletions
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2
clang/include/clang/Basic/DiagnosticCommonKinds.td
View File

@ -81,6 +81,8 @@ def err_deleted_non_function : Error<
"only functions can have deleted definitions">;
def err_module_not_found : Error<"module '%0' not found">, DefaultFatal;
def err_module_not_built : Error<"could not build module '%0'">, DefaultFatal;
def err_module_lock_failure : Error<
"could not acquire lock file for module '%0'">, DefaultFatal;
def err_module_cycle : Error<"cyclic dependency in module '%0': %1">,
DefaultFatal;
def note_pragma_entered_here : Note<"#pragma entered here">;

13
clang/lib/Frontend/CompilerInstance.cpp
View File

@ -990,9 +990,10 @@ static bool compileAndLoadModule(CompilerInstance &ImportingInstance,
SourceLocation ImportLoc,
SourceLocation ModuleNameLoc, Module *Module,
StringRef ModuleFileName) {
DiagnosticsEngine &Diags = ImportingInstance.getDiagnostics();
auto diagnoseBuildFailure = [&] {
ImportingInstance.getDiagnostics().Report(ModuleNameLoc,
diag::err_module_not_built)
Diags.Report(ModuleNameLoc, diag::err_module_not_built)
<< Module->Name << SourceRange(ImportLoc, ModuleNameLoc);
};
@ -1006,6 +1007,8 @@ static bool compileAndLoadModule(CompilerInstance &ImportingInstance,
llvm::LockFileManager Locked(ModuleFileName);
switch (Locked) {
case llvm::LockFileManager::LFS_Error:
Diags.Report(ModuleNameLoc, diag::err_module_lock_failure)
<< Module->Name;
return false;
case llvm::LockFileManager::LFS_Owned:
@ -1040,6 +1043,10 @@ static bool compileAndLoadModule(CompilerInstance &ImportingInstance,
continue;
} else if (ReadResult == ASTReader::Missing) {
diagnoseBuildFailure();
} else if (ReadResult != ASTReader::Success &&
!Diags.hasErrorOccurred()) {
// The ASTReader didn't diagnose the error, so conservatively report it.
diagnoseBuildFailure();
}
return ReadResult == ASTReader::Success;
}
@ -1362,6 +1369,8 @@ CompilerInstance::loadModule(SourceLocation ImportLoc,
// Try to compile and then load the module.
if (!compileAndLoadModule(*this, ImportLoc, ModuleNameLoc, Module,
ModuleFileName)) {
assert(getDiagnostics().hasErrorOccurred() &&
"undiagnosed error in compileAndLoadModule");
if (getPreprocessorOpts().FailedModules)
getPreprocessorOpts().FailedModules->addFailed(ModuleName);
KnownModules[Path[0].first] = nullptr;