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-rw-r--r--contrib/llvm/tools/lldb/source/Utility/Error.cpp274
1 files changed, 274 insertions, 0 deletions
diff --git a/contrib/llvm/tools/lldb/source/Utility/Error.cpp b/contrib/llvm/tools/lldb/source/Utility/Error.cpp
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--- /dev/null
+++ b/contrib/llvm/tools/lldb/source/Utility/Error.cpp
@@ -0,0 +1,274 @@
+//===-- Error.cpp -----------------------------------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "lldb/Utility/Error.h"
+
+#include "lldb/Utility/VASPrintf.h"
+#include "lldb/lldb-defines.h" // for LLDB_GENERIC_ERROR
+#include "lldb/lldb-enumerations.h" // for ErrorType, ErrorType::eErr...
+#include "llvm/ADT/SmallString.h" // for SmallString
+#include "llvm/ADT/StringRef.h" // for StringRef
+#include "llvm/Support/FormatProviders.h" // for format_provider
+
+#include <cerrno>
+#include <cstdarg>
+#include <string> // for string
+#include <system_error>
+
+#ifdef __APPLE__
+#include <mach/mach.h>
+#endif
+
+#include <stdint.h> // for uint32_t
+#include <string.h> // for strerror
+
+namespace llvm {
+class raw_ostream;
+}
+
+using namespace lldb;
+using namespace lldb_private;
+
+Error::Error() : m_code(0), m_type(eErrorTypeInvalid), m_string() {}
+
+Error::Error(ValueType err, ErrorType type)
+ : m_code(err), m_type(type), m_string() {}
+
+Error::Error(std::error_code EC)
+ : m_code(EC.value()), m_type(ErrorType::eErrorTypeGeneric),
+ m_string(EC.message()) {}
+
+Error::Error(const Error &rhs) = default;
+
+Error::Error(const char *format, ...)
+ : m_code(0), m_type(eErrorTypeInvalid), m_string() {
+ va_list args;
+ va_start(args, format);
+ SetErrorToGenericError();
+ SetErrorStringWithVarArg(format, args);
+ va_end(args);
+}
+
+//----------------------------------------------------------------------
+// Assignment operator
+//----------------------------------------------------------------------
+const Error &Error::operator=(const Error &rhs) {
+ if (this != &rhs) {
+ m_code = rhs.m_code;
+ m_type = rhs.m_type;
+ m_string = rhs.m_string;
+ }
+ return *this;
+}
+
+//----------------------------------------------------------------------
+// Assignment operator
+//----------------------------------------------------------------------
+const Error &Error::operator=(uint32_t err) {
+ m_code = err;
+ m_type = eErrorTypeMachKernel;
+ m_string.clear();
+ return *this;
+}
+
+Error::~Error() = default;
+
+//----------------------------------------------------------------------
+// Get the error value as a NULL C string. The error string will be
+// fetched and cached on demand. The cached error string value will
+// remain until the error value is changed or cleared.
+//----------------------------------------------------------------------
+const char *Error::AsCString(const char *default_error_str) const {
+ if (Success())
+ return nullptr;
+
+ if (m_string.empty()) {
+ const char *s = nullptr;
+ switch (m_type) {
+ case eErrorTypeMachKernel:
+#if defined(__APPLE__)
+ s = ::mach_error_string(m_code);
+#endif
+ break;
+
+ case eErrorTypePOSIX:
+ s = ::strerror(m_code);
+ break;
+
+ default:
+ break;
+ }
+ if (s != nullptr)
+ m_string.assign(s);
+ }
+ if (m_string.empty()) {
+ if (default_error_str)
+ m_string.assign(default_error_str);
+ else
+ return nullptr; // User wanted a nullptr string back...
+ }
+ return m_string.c_str();
+}
+
+//----------------------------------------------------------------------
+// Clear the error and any cached error string that it might contain.
+//----------------------------------------------------------------------
+void Error::Clear() {
+ m_code = 0;
+ m_type = eErrorTypeInvalid;
+ m_string.clear();
+}
+
+//----------------------------------------------------------------------
+// Access the error value.
+//----------------------------------------------------------------------
+Error::ValueType Error::GetError() const { return m_code; }
+
+//----------------------------------------------------------------------
+// Access the error type.
+//----------------------------------------------------------------------
+ErrorType Error::GetType() const { return m_type; }
+
+//----------------------------------------------------------------------
+// Returns true if this object contains a value that describes an
+// error or otherwise non-success result.
+//----------------------------------------------------------------------
+bool Error::Fail() const { return m_code != 0; }
+
+//----------------------------------------------------------------------
+// Set accesssor for the error value to "err" and the type to
+// "eErrorTypeMachKernel"
+//----------------------------------------------------------------------
+void Error::SetMachError(uint32_t err) {
+ m_code = err;
+ m_type = eErrorTypeMachKernel;
+ m_string.clear();
+}
+
+void Error::SetExpressionError(lldb::ExpressionResults result,
+ const char *mssg) {
+ m_code = result;
+ m_type = eErrorTypeExpression;
+ m_string = mssg;
+}
+
+int Error::SetExpressionErrorWithFormat(lldb::ExpressionResults result,
+ const char *format, ...) {
+ int length = 0;
+
+ if (format != nullptr && format[0]) {
+ va_list args;
+ va_start(args, format);
+ length = SetErrorStringWithVarArg(format, args);
+ va_end(args);
+ } else {
+ m_string.clear();
+ }
+ m_code = result;
+ m_type = eErrorTypeExpression;
+ return length;
+}
+
+//----------------------------------------------------------------------
+// Set accesssor for the error value and type.
+//----------------------------------------------------------------------
+void Error::SetError(ValueType err, ErrorType type) {
+ m_code = err;
+ m_type = type;
+ m_string.clear();
+}
+
+//----------------------------------------------------------------------
+// Update the error value to be "errno" and update the type to
+// be "POSIX".
+//----------------------------------------------------------------------
+void Error::SetErrorToErrno() {
+ m_code = errno;
+ m_type = eErrorTypePOSIX;
+ m_string.clear();
+}
+
+//----------------------------------------------------------------------
+// Update the error value to be LLDB_GENERIC_ERROR and update the type
+// to be "Generic".
+//----------------------------------------------------------------------
+void Error::SetErrorToGenericError() {
+ m_code = LLDB_GENERIC_ERROR;
+ m_type = eErrorTypeGeneric;
+ m_string.clear();
+}
+
+//----------------------------------------------------------------------
+// Set accessor for the error string value for a specific error.
+// This allows any string to be supplied as an error explanation.
+// The error string value will remain until the error value is
+// cleared or a new error value/type is assigned.
+//----------------------------------------------------------------------
+void Error::SetErrorString(llvm::StringRef err_str) {
+ if (!err_str.empty()) {
+ // If we have an error string, we should always at least have an error
+ // set to a generic value.
+ if (Success())
+ SetErrorToGenericError();
+ }
+ m_string = err_str;
+}
+
+//------------------------------------------------------------------
+/// Set the current error string to a formatted error string.
+///
+/// @param format
+/// A printf style format string
+//------------------------------------------------------------------
+int Error::SetErrorStringWithFormat(const char *format, ...) {
+ if (format != nullptr && format[0]) {
+ va_list args;
+ va_start(args, format);
+ int length = SetErrorStringWithVarArg(format, args);
+ va_end(args);
+ return length;
+ } else {
+ m_string.clear();
+ }
+ return 0;
+}
+
+int Error::SetErrorStringWithVarArg(const char *format, va_list args) {
+ if (format != nullptr && format[0]) {
+ // If we have an error string, we should always at least have
+ // an error set to a generic value.
+ if (Success())
+ SetErrorToGenericError();
+
+ llvm::SmallString<1024> buf;
+ VASprintf(buf, format, args);
+ m_string = buf.str();
+ return buf.size();
+ } else {
+ m_string.clear();
+ }
+ return 0;
+}
+
+//----------------------------------------------------------------------
+// Returns true if the error code in this object is considered a
+// successful return value.
+//----------------------------------------------------------------------
+bool Error::Success() const { return m_code == 0; }
+
+bool Error::WasInterrupted() const {
+ return (m_type == eErrorTypePOSIX && m_code == EINTR);
+}
+
+void llvm::format_provider<lldb_private::Error>::format(
+ const lldb_private::Error &error, llvm::raw_ostream &OS,
+ llvm::StringRef Options) {
+ llvm::format_provider<llvm::StringRef>::format(error.AsCString(), OS,
+ Options);
+}
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