Attachment 227227 Details for Bug 253881 – Fix lldb sometimes throwing a 'unhandled Error'

[patch] Fix lldb sometimes throwing a 'unhandled Error'

fix-lldb-12-unhandled-error-1.diff (text/plain), 4.62 KB, created by Dimitry Andric on 2021-08-15 17:47:49 UTC

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Creator: Dimitry Andric

Created: 2021-08-15 17:47:49 UTC

Size: 4.62 KB

patch

obsolete

>diff --git a/contrib/llvm-project/lldb/source/Symbol/TypeSystem.cpp b/contrib/llvm-project/lldb/source/Symbol/TypeSystem.cpp
>index 2adf36fa8276..83161f32444c 100644
>--- a/contrib/llvm-project/lldb/source/Symbol/TypeSystem.cpp
>+++ b/contrib/llvm-project/lldb/source/Symbol/TypeSystem.cpp
>@@ -224,62 +224,32 @@ void TypeSystemMap::ForEach(std::function<bool(TypeSystem *)> const &callback) {
> llvm::Expected<TypeSystem &> TypeSystemMap::GetTypeSystemForLanguage(
>     lldb::LanguageType language,
>     llvm::Optional<CreateCallback> create_callback) {
>-  llvm::Error error = llvm::Error::success();
>-  assert(!error); // Check the success value when assertions are enabled
>   std::lock_guard<std::mutex> guard(m_mutex);
>-  if (m_clear_in_progress) {
>-    error = llvm::make_error<llvm::StringError>(
>+  if (m_clear_in_progress)
>+    return llvm::make_error<llvm::StringError>(
>         "Unable to get TypeSystem because TypeSystemMap is being cleared",
>         llvm::inconvertibleErrorCode());
>-  } else {
>-    collection::iterator pos = m_map.find(language);
>-    if (pos != m_map.end()) {
>-      auto *type_system = pos->second.get();
>-      if (type_system) {
>-        llvm::consumeError(std::move(error));
>-        return *type_system;
>-      }
>-      error = llvm::make_error<llvm::StringError>(
>-          "TypeSystem for language " +
>-              llvm::StringRef(Language::GetNameForLanguageType(language)) +
>-              " doesn't exist",
>-          llvm::inconvertibleErrorCode());
>-      return std::move(error);
>-    }
> 
>-    for (const auto &pair : m_map) {
>-      if (pair.second && pair.second->SupportsLanguage(language)) {
>-        // Add a new mapping for "language" to point to an already existing
>-        // TypeSystem that supports this language
>-        m_map[language] = pair.second;
>-        if (pair.second.get()) {
>-          llvm::consumeError(std::move(error));
>-          return *pair.second.get();
>-        }
>-        error = llvm::make_error<llvm::StringError>(
>-            "TypeSystem for language " +
>-                llvm::StringRef(Language::GetNameForLanguageType(language)) +
>-                " doesn't exist",
>-            llvm::inconvertibleErrorCode());
>-        return std::move(error);
>-      }
>-    }
>+  collection::iterator pos = m_map.find(language);
>+  if (pos != m_map.end()) {
>+    auto *type_system = pos->second.get();
>+    if (type_system)
>+      return *type_system;
>+    return llvm::make_error<llvm::StringError>(
>+        "TypeSystem for language " +
>+            llvm::StringRef(Language::GetNameForLanguageType(language)) +
>+            " doesn't exist",
>+        llvm::inconvertibleErrorCode());
>+  }
> 
>-    if (!create_callback) {
>-      error = llvm::make_error<llvm::StringError>(
>-          "Unable to find type system for language " +
>-              llvm::StringRef(Language::GetNameForLanguageType(language)),
>-          llvm::inconvertibleErrorCode());
>-    } else {
>-      // Cache even if we get a shared pointer that contains a null type system
>-      // back
>-      TypeSystemSP type_system_sp = (*create_callback)();
>-      m_map[language] = type_system_sp;
>-      if (type_system_sp.get()) {
>-        llvm::consumeError(std::move(error));
>-        return *type_system_sp.get();
>-      }
>-      error = llvm::make_error<llvm::StringError>(
>+  for (const auto &pair : m_map) {
>+    if (pair.second && pair.second->SupportsLanguage(language)) {
>+      // Add a new mapping for "language" to point to an already existing
>+      // TypeSystem that supports this language
>+      m_map[language] = pair.second;
>+      if (pair.second.get())
>+        return *pair.second.get();
>+      return llvm::make_error<llvm::StringError>(
>           "TypeSystem for language " +
>               llvm::StringRef(Language::GetNameForLanguageType(language)) +
>               " doesn't exist",
>@@ -287,7 +257,23 @@ llvm::Expected<TypeSystem &> TypeSystemMap::GetTypeSystemForLanguage(
>     }
>   }
> 
>-  return std::move(error);
>+  if (!create_callback)
>+    return llvm::make_error<llvm::StringError>(
>+        "Unable to find type system for language " +
>+            llvm::StringRef(Language::GetNameForLanguageType(language)),
>+        llvm::inconvertibleErrorCode());
>+
>+  // Cache even if we get a shared pointer that contains a null type system
>+  // back
>+  TypeSystemSP type_system_sp = (*create_callback)();
>+  m_map[language] = type_system_sp;
>+  if (type_system_sp.get())
>+    return *type_system_sp.get();
>+  return llvm::make_error<llvm::StringError>(
>+      "TypeSystem for language " +
>+          llvm::StringRef(Language::GetNameForLanguageType(language)) +
>+          " doesn't exist",
>+      llvm::inconvertibleErrorCode());
> }
> 
> llvm::Expected<TypeSystem &>

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Attachments on bug 253881: 227227 | 227244