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