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// Copyright 2014 The lldb Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Some errors returned by this package.
//
// Note that this package can return more errors than declared here, for
// example io.EOF from Filer.ReadAt().
package lldb
import (
"fmt"
)
// ErrDecodeScalars is possibly returned from DecodeScalars
type ErrDecodeScalars struct {
B []byte // Data being decoded
I int // offending offset
}
// Error implements the built in error type.
func (e *ErrDecodeScalars) Error() string {
return fmt.Sprintf("DecodeScalars: corrupted data @ %d/%d", e.I, len(e.B))
}
// ErrINVAL reports invalid values passed as parameters, for example negative
// offsets where only non-negative ones are allowed or read from the DB.
type ErrINVAL struct {
Src string
Val interface{}
}
// Error implements the built in error type.
func (e *ErrINVAL) Error() string {
return fmt.Sprintf("%s: %+v", e.Src, e.Val)
}
// ErrPERM is for example reported when a Filer is closed while BeginUpdate(s)
// are not balanced with EndUpdate(s)/Rollback(s) or when EndUpdate or Rollback
// is invoked which is not paired with a BeginUpdate.
type ErrPERM struct {
Src string
}
// Error implements the built in error type.
func (e *ErrPERM) Error() string {
return fmt.Sprintf("%s: Operation not permitted", string(e.Src))
}
// ErrTag represents an ErrILSEQ kind.
type ErrType int
// ErrILSEQ types
const (
ErrOther ErrType = iota
ErrAdjacentFree // Adjacent free blocks (.Off and .Arg)
ErrDecompress // Used compressed block: corrupted compression
ErrExpFreeTag // Expected a free block tag, got .Arg
ErrExpUsedTag // Expected a used block tag, got .Arg
ErrFLT // Free block is invalid or referenced multiple times
ErrFLTLoad // FLT truncated to .Off, need size >= .Arg
ErrFLTSize // Free block size (.Arg) doesn't belong to its list min size: .Arg2
ErrFileSize // File .Name size (.Arg) != 0 (mod 16)
ErrFreeChaining // Free block, .prev.next doesn't point back to this block
ErrFreeTailBlock // Last block is free
ErrHead // Head of a free block list has non zero Prev (.Arg)
ErrInvalidRelocTarget // Reloc doesn't target (.Arg) a short or long used block
ErrInvalidWAL // Corrupted write ahead log. .Name: file name, .More: more
ErrLongFreeBlkTooLong // Long free block spans beyond EOF, size .Arg
ErrLongFreeBlkTooShort // Long free block must have at least 2 atoms, got only .Arg
ErrLongFreeNextBeyondEOF // Long free block .Next (.Arg) spans beyond EOF
ErrLongFreePrevBeyondEOF // Long free block .Prev (.Arg) spans beyond EOF
ErrLongFreeTailTag // Expected a long free block tail tag, got .Arg
ErrLostFreeBlock // Free block is not in any FLT list
ErrNullReloc // Used reloc block with nil target
ErrRelocBeyondEOF // Used reloc points (.Arg) beyond EOF
ErrShortFreeTailTag // Expected a short free block tail tag, got .Arg
ErrSmall // Request for a free block (.Arg) returned a too small one (.Arg2) at .Off
ErrTailTag // Block at .Off has invalid tail CC (compression code) tag, got .Arg
ErrUnexpReloc // Unexpected reloc block referred to from reloc block .Arg
ErrVerifyPadding // Used block has nonzero padding
ErrVerifyTailSize // Long free block size .Arg but tail size .Arg2
ErrVerifyUsedSpan // Used block size (.Arg) spans beyond EOF
)
// ErrILSEQ reports a corrupted file format. Details in fields according to Type.
type ErrILSEQ struct {
Type ErrType
Off int64
Arg int64
Arg2 int64
Arg3 int64
Name string
More interface{}
}
// Error implements the built in error type.
func (e *ErrILSEQ) Error() string {
switch e.Type {
case ErrAdjacentFree:
return fmt.Sprintf("Adjacent free blocks at offset %#x and %#x", e.Off, e.Arg)
case ErrDecompress:
return fmt.Sprintf("Compressed block at offset %#x: Corrupted compressed content", e.Off)
case ErrExpFreeTag:
return fmt.Sprintf("Block at offset %#x: Expected a free block tag, got %#2x", e.Off, e.Arg)
case ErrExpUsedTag:
return fmt.Sprintf("Block at ofset %#x: Expected a used block tag, got %#2x", e.Off, e.Arg)
case ErrFLT:
return fmt.Sprintf("Free block at offset %#x is invalid or referenced multiple times", e.Off)
case ErrFLTLoad:
return fmt.Sprintf("FLT truncated to size %d, expected at least %d", e.Off, e.Arg)
case ErrFLTSize:
return fmt.Sprintf("Free block at offset %#x has size (%#x) should be at least (%#x)", e.Off, e.Arg, e.Arg2)
case ErrFileSize:
return fmt.Sprintf("File %q size (%#x) != 0 (mod 16)", e.Name, e.Arg)
case ErrFreeChaining:
return fmt.Sprintf("Free block at offset %#x: .prev.next doesn point back here.", e.Off)
case ErrFreeTailBlock:
return fmt.Sprintf("Free block at offset %#x: Cannot be last file block", e.Off)
case ErrHead:
return fmt.Sprintf("Block at offset %#x: Head of free block list has non zero .prev %#x", e.Off, e.Arg)
case ErrInvalidRelocTarget:
return fmt.Sprintf("Used reloc block at offset %#x: Target (%#x) is not a short or long used block", e.Off, e.Arg)
case ErrInvalidWAL:
return fmt.Sprintf("Corrupted write ahead log file: %q %v", e.Name, e.More)
case ErrLongFreeBlkTooLong:
return fmt.Sprintf("Long free block at offset %#x: Size (%#x) beyond EOF", e.Off, e.Arg)
case ErrLongFreeBlkTooShort:
return fmt.Sprintf("Long free block at offset %#x: Size (%#x) too small", e.Off, e.Arg)
case ErrLongFreeNextBeyondEOF:
return fmt.Sprintf("Long free block at offset %#x: Next (%#x) points beyond EOF", e.Off, e.Arg)
case ErrLongFreePrevBeyondEOF:
return fmt.Sprintf("Long free block at offset %#x: Prev (%#x) points beyond EOF", e.Off, e.Arg)
case ErrLongFreeTailTag:
return fmt.Sprintf("Block at offset %#x: Expected long free tail tag, got %#2x", e.Off, e.Arg)
case ErrLostFreeBlock:
return fmt.Sprintf("Free block at offset %#x: not in any FLT list", e.Off)
case ErrNullReloc:
return fmt.Sprintf("Used reloc block at offset %#x: Nil target", e.Off)
case ErrRelocBeyondEOF:
return fmt.Sprintf("Used reloc block at offset %#x: Link (%#x) points beyond EOF", e.Off, e.Arg)
case ErrShortFreeTailTag:
return fmt.Sprintf("Block at offset %#x: Expected short free tail tag, got %#2x", e.Off, e.Arg)
case ErrSmall:
return fmt.Sprintf("Request for of free block of size %d returned a too small (%d) one at offset %#x", e.Arg, e.Arg2, e.Off)
case ErrTailTag:
return fmt.Sprintf("Block at offset %#x: Invalid tail CC tag, got %#2x", e.Off, e.Arg)
case ErrUnexpReloc:
return fmt.Sprintf("Block at offset %#x: Unexpected reloc block. Referred to from reloc block at offset %#x", e.Off, e.Arg)
case ErrVerifyPadding:
return fmt.Sprintf("Used block at offset %#x: Nonzero padding", e.Off)
case ErrVerifyTailSize:
return fmt.Sprintf("Long free block at offset %#x: Size %#x, but tail size %#x", e.Off, e.Arg, e.Arg2)
case ErrVerifyUsedSpan:
return fmt.Sprintf("Used block at offset %#x: Size %#x spans beyond EOF", e.Off, e.Arg)
}
more := ""
if e.More != nil {
more = fmt.Sprintf(", %v", e.More)
}
off := ""
if e.Off != 0 {
off = fmt.Sprintf(", off: %#x", e.Off)
}
return fmt.Sprintf("Error%s%s", off, more)
}
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