forked from OSchip/llvm-project
434 lines
12 KiB
C++
434 lines
12 KiB
C++
//===-- Error.cpp -----------------------------------------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// C Includes
|
|
#ifdef __APPLE__
|
|
#include <mach/mach.h>
|
|
#endif
|
|
|
|
// C++ Includes
|
|
// Other libraries and framework includes
|
|
// Project includes
|
|
#include "lldb/Core/Error.h"
|
|
#include "lldb/Core/Log.h"
|
|
#include "llvm/ADT/SmallVector.h"
|
|
#include <cerrno>
|
|
#include <cstdarg>
|
|
|
|
#if (defined (__arm__) || defined (__arm64__)) && defined (__APPLE__)
|
|
#include <SpringBoardServices/SpringBoardServer.h>
|
|
#endif
|
|
|
|
using namespace lldb;
|
|
using namespace lldb_private;
|
|
|
|
Error::Error ():
|
|
m_code (0),
|
|
m_type (eErrorTypeInvalid),
|
|
m_string ()
|
|
{
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// Default constructor
|
|
//----------------------------------------------------------------------
|
|
Error::Error(ValueType err, ErrorType type) :
|
|
m_code (err),
|
|
m_type (type),
|
|
m_string ()
|
|
{
|
|
}
|
|
|
|
Error::Error (const Error &rhs) :
|
|
m_code (rhs.m_code),
|
|
m_type (rhs.m_type),
|
|
m_string (rhs.m_string)
|
|
{
|
|
}
|
|
|
|
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()
|
|
{
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// 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 NULL;
|
|
|
|
if (m_string.empty())
|
|
{
|
|
const char *s = NULL;
|
|
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)
|
|
m_string.assign(s);
|
|
}
|
|
if (m_string.empty())
|
|
{
|
|
if (default_error_str)
|
|
m_string.assign(default_error_str);
|
|
else
|
|
return NULL; // User wanted a NULL 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 = eErrorTypeGeneric;
|
|
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;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// Retuns true if this object contains an value that describes an
|
|
// error or otherwise non-success result.
|
|
//----------------------------------------------------------------------
|
|
bool
|
|
Error::Fail () const
|
|
{
|
|
return m_code != 0;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// Log the error given a string with format. If the this object
|
|
// contains an error code, update the error string to contain the
|
|
// "error: " followed by the formatted string, followed by the error
|
|
// value and any string that describes the current error. This
|
|
// allows more context to be given to an error string that remains
|
|
// cached in this object. Logging always occurs even when the error
|
|
// code contains a non-error value.
|
|
//----------------------------------------------------------------------
|
|
void
|
|
Error::PutToLog (Log *log, const char *format, ...)
|
|
{
|
|
char *arg_msg = NULL;
|
|
va_list args;
|
|
va_start (args, format);
|
|
::vasprintf (&arg_msg, format, args);
|
|
va_end (args);
|
|
|
|
if (arg_msg != NULL)
|
|
{
|
|
if (Fail())
|
|
{
|
|
const char *err_str = AsCString();
|
|
if (err_str == NULL)
|
|
err_str = "???";
|
|
|
|
SetErrorStringWithFormat("error: %s err = %s (0x%8.8x)", arg_msg, err_str, m_code);
|
|
if (log)
|
|
log->Error("%s", m_string.c_str());
|
|
}
|
|
else
|
|
{
|
|
if (log)
|
|
log->Printf("%s err = 0x%8.8x", arg_msg, m_code);
|
|
}
|
|
::free (arg_msg);
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// Log the error given a string with format. If the this object
|
|
// contains an error code, update the error string to contain the
|
|
// "error: " followed by the formatted string, followed by the error
|
|
// value and any string that describes the current error. This
|
|
// allows more context to be given to an error string that remains
|
|
// cached in this object. Logging only occurs even when the error
|
|
// code contains a error value.
|
|
//----------------------------------------------------------------------
|
|
void
|
|
Error::LogIfError (Log *log, const char *format, ...)
|
|
{
|
|
if (Fail())
|
|
{
|
|
char *arg_msg = NULL;
|
|
va_list args;
|
|
va_start (args, format);
|
|
::vasprintf (&arg_msg, format, args);
|
|
va_end (args);
|
|
|
|
if (arg_msg != NULL)
|
|
{
|
|
const char *err_str = AsCString();
|
|
if (err_str == NULL)
|
|
err_str = "???";
|
|
|
|
SetErrorStringWithFormat("%s err = %s (0x%8.8x)", arg_msg, err_str, m_code);
|
|
if (log)
|
|
log->Error("%s", m_string.c_str());
|
|
|
|
::free (arg_msg);
|
|
}
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// 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 && 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 (const char *err_str)
|
|
{
|
|
if (err_str && err_str[0])
|
|
{
|
|
// 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;
|
|
}
|
|
else
|
|
m_string.clear();
|
|
}
|
|
|
|
//------------------------------------------------------------------
|
|
/// 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 && 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 && format[0])
|
|
{
|
|
// If we have an error string, we should always at least have
|
|
// an error set to a generic value.
|
|
if (Success())
|
|
SetErrorToGenericError();
|
|
|
|
// Try and fit our error into a 1024 byte buffer first...
|
|
llvm::SmallVector<char, 1024> buf;
|
|
buf.resize(1024);
|
|
// Copy in case our first call to vsnprintf doesn't fit into our
|
|
// allocated buffer above
|
|
va_list copy_args;
|
|
va_copy (copy_args, args);
|
|
unsigned length = ::vsnprintf (buf.data(), buf.size(), format, args);
|
|
if (length >= buf.size())
|
|
{
|
|
// The error formatted string didn't fit into our buffer, resize it
|
|
// to the exact needed size, and retry
|
|
buf.resize(length + 1);
|
|
length = ::vsnprintf (buf.data(), buf.size(), format, copy_args);
|
|
va_end (copy_args);
|
|
assert (length < buf.size());
|
|
}
|
|
m_string.assign(buf.data(), length);
|
|
va_end (args);
|
|
return length;
|
|
}
|
|
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
|
|
{
|
|
if (m_type == eErrorTypePOSIX && m_code == EINTR)
|
|
return true;
|
|
else
|
|
return false;
|
|
}
|
|
|