1 //===-- Status.cpp -----------------------------------------------*- C++
4 // The LLVM Compiler Infrastructure
6 // This file is distributed under the University of Illinois Open Source
7 // License. See LICENSE.TXT for details.
9 //===----------------------------------------------------------------------===//
11 #include "lldb/Utility/Status.h"
13 #include "lldb/Utility/VASPrintf.h"
14 #include "lldb/lldb-defines.h" // for LLDB_GENERIC_ERROR
15 #include "lldb/lldb-enumerations.h" // for ErrorType, ErrorType::eErr...
16 #include "llvm/ADT/SmallString.h" // for SmallString
17 #include "llvm/ADT/StringRef.h" // for StringRef
18 #include "llvm/Support/Errno.h"
19 #include "llvm/Support/FormatProviders.h" // for format_provider
23 #include <string> // for string
24 #include <system_error>
27 #include <mach/mach.h>
30 #include <stdint.h> // for uint32_t
37 using namespace lldb_private;
39 Status::Status() : m_code(0), m_type(eErrorTypeInvalid), m_string() {}
41 Status::Status(ValueType err, ErrorType type)
42 : m_code(err), m_type(type), m_string() {}
44 Status::Status(std::error_code EC)
45 : m_code(EC.value()), m_type(ErrorType::eErrorTypeGeneric),
46 m_string(EC.message()) {}
48 Status::Status(const Status &rhs) = default;
50 Status::Status(const char *format, ...)
51 : m_code(0), m_type(eErrorTypeInvalid), m_string() {
53 va_start(args, format);
54 SetErrorToGenericError();
55 SetErrorStringWithVarArg(format, args);
59 const Status &Status::operator=(llvm::Error error) {
65 // if the error happens to be a errno error, preserve the error code
66 error = llvm::handleErrors(
67 std::move(error), [&](std::unique_ptr<llvm::ECError> e) -> llvm::Error {
68 std::error_code ec = e->convertToErrorCode();
69 if (ec.category() == std::generic_category()) {
71 m_type = ErrorType::eErrorTypePOSIX;
72 return llvm::Error::success();
74 return llvm::Error(std::move(e));
77 // Otherwise, just preserve the message
79 SetErrorToGenericError();
80 SetErrorString(llvm::toString(std::move(error)));
86 llvm::Error Status::ToError() const {
88 return llvm::Error::success();
89 if (m_type == ErrorType::eErrorTypePOSIX)
90 return llvm::errorCodeToError(std::error_code(m_code, std::generic_category()));
91 return llvm::make_error<llvm::StringError>(AsCString(),
92 llvm::inconvertibleErrorCode());
95 //----------------------------------------------------------------------
96 // Assignment operator
97 //----------------------------------------------------------------------
98 const Status &Status::operator=(const Status &rhs) {
102 m_string = rhs.m_string;
107 //----------------------------------------------------------------------
108 // Assignment operator
109 //----------------------------------------------------------------------
110 const Status &Status::operator=(uint32_t err) {
112 m_type = eErrorTypeMachKernel;
117 Status::~Status() = default;
119 //----------------------------------------------------------------------
120 // Get the error value as a NULL C string. The error string will be
121 // fetched and cached on demand. The cached error string value will
122 // remain until the error value is changed or cleared.
123 //----------------------------------------------------------------------
124 const char *Status::AsCString(const char *default_error_str) const {
128 if (m_string.empty()) {
130 case eErrorTypeMachKernel:
131 #if defined(__APPLE__)
132 if (const char *s = ::mach_error_string(m_code))
137 case eErrorTypePOSIX:
138 m_string = llvm::sys::StrError(m_code);
145 if (m_string.empty()) {
146 if (default_error_str)
147 m_string.assign(default_error_str);
149 return nullptr; // User wanted a nullptr string back...
151 return m_string.c_str();
154 //----------------------------------------------------------------------
155 // Clear the error and any cached error string that it might contain.
156 //----------------------------------------------------------------------
157 void Status::Clear() {
159 m_type = eErrorTypeInvalid;
163 //----------------------------------------------------------------------
164 // Access the error value.
165 //----------------------------------------------------------------------
166 Status::ValueType Status::GetError() const { return m_code; }
168 //----------------------------------------------------------------------
169 // Access the error type.
170 //----------------------------------------------------------------------
171 ErrorType Status::GetType() const { return m_type; }
173 //----------------------------------------------------------------------
174 // Returns true if this object contains a value that describes an
175 // error or otherwise non-success result.
176 //----------------------------------------------------------------------
177 bool Status::Fail() const { return m_code != 0; }
179 //----------------------------------------------------------------------
180 // Set accesssor for the error value to "err" and the type to
181 // "eErrorTypeMachKernel"
182 //----------------------------------------------------------------------
183 void Status::SetMachError(uint32_t err) {
185 m_type = eErrorTypeMachKernel;
189 void Status::SetExpressionError(lldb::ExpressionResults result,
192 m_type = eErrorTypeExpression;
196 int Status::SetExpressionErrorWithFormat(lldb::ExpressionResults result,
197 const char *format, ...) {
200 if (format != nullptr && format[0]) {
202 va_start(args, format);
203 length = SetErrorStringWithVarArg(format, args);
209 m_type = eErrorTypeExpression;
213 //----------------------------------------------------------------------
214 // Set accesssor for the error value and type.
215 //----------------------------------------------------------------------
216 void Status::SetError(ValueType err, ErrorType type) {
222 //----------------------------------------------------------------------
223 // Update the error value to be "errno" and update the type to
225 //----------------------------------------------------------------------
226 void Status::SetErrorToErrno() {
228 m_type = eErrorTypePOSIX;
232 //----------------------------------------------------------------------
233 // Update the error value to be LLDB_GENERIC_ERROR and update the type
235 //----------------------------------------------------------------------
236 void Status::SetErrorToGenericError() {
237 m_code = LLDB_GENERIC_ERROR;
238 m_type = eErrorTypeGeneric;
242 //----------------------------------------------------------------------
243 // Set accessor for the error string value for a specific error.
244 // This allows any string to be supplied as an error explanation.
245 // The error string value will remain until the error value is
246 // cleared or a new error value/type is assigned.
247 //----------------------------------------------------------------------
248 void Status::SetErrorString(llvm::StringRef err_str) {
249 if (!err_str.empty()) {
250 // If we have an error string, we should always at least have an error
251 // set to a generic value.
253 SetErrorToGenericError();
258 //------------------------------------------------------------------
259 /// Set the current error string to a formatted error string.
262 /// A printf style format string
263 //------------------------------------------------------------------
264 int Status::SetErrorStringWithFormat(const char *format, ...) {
265 if (format != nullptr && format[0]) {
267 va_start(args, format);
268 int length = SetErrorStringWithVarArg(format, args);
277 int Status::SetErrorStringWithVarArg(const char *format, va_list args) {
278 if (format != nullptr && format[0]) {
279 // If we have an error string, we should always at least have
280 // an error set to a generic value.
282 SetErrorToGenericError();
284 llvm::SmallString<1024> buf;
285 VASprintf(buf, format, args);
286 m_string = buf.str();
294 //----------------------------------------------------------------------
295 // Returns true if the error code in this object is considered a
296 // successful return value.
297 //----------------------------------------------------------------------
298 bool Status::Success() const { return m_code == 0; }
300 bool Status::WasInterrupted() const {
301 return (m_type == eErrorTypePOSIX && m_code == EINTR);
304 void llvm::format_provider<lldb_private::Status>::format(
305 const lldb_private::Status &error, llvm::raw_ostream &OS,
306 llvm::StringRef Options) {
307 llvm::format_provider<llvm::StringRef>::format(error.AsCString(), OS,