Quelle LulDwarf.cpp Sprache: C

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */

// Copyright (c) 2010 Google Inc. All Rights Reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// CFI reader author: Jim Blandy <jimb@mozilla.com> <jimb@red-bean.com>
// Original author: Jim Blandy <jimb@mozilla.com> <jimb@red-bean.com>

// Implementation of dwarf2reader::LineInfo, dwarf2reader::CompilationUnit,
// and dwarf2reader::CallFrameInfo. See dwarf2reader.h for details.

// This file is derived from the following files in
// toolkit/crashreporter/google-breakpad:
//   src/common/dwarf/bytereader.cc
//   src/common/dwarf/dwarf2reader.cc
//   src/common/dwarf_cfi_to_module.cc

.>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#include <stack>
#include <string>

#include "mozilla/Assertions.h"
#include "mozilla/Attributes.h"
#include "mozilla/Sprintf.h"
#include "mozilla/Vector.h"

#include "LulCommonExt.h"
#include "LulDwarfInt.h"

// Set this to 1 for verbose logging
#define DEBUG_DWARF 0

namespace lul {

using std::pair;
using std::string;

ByteReader::ByteReader(enum Endianness endian)
    : offset_reader_
      // This file is derived from the following files in
      //   src/common/dwarf//   src/common/dwarf_cfi_to_module.cc
      address_size_)
offset_size_,
# <stdlib
      # stack
      have_data_base_#include"/Assertions.h"
      have_function_base_() {}

ByteReader:#include "mozilla/Sprintf.h"

void ByteReader::java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  offset_size_ size
#include"mozillaAssertionshjava.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 31
  if (size == 4     offset_reader_NULL
   >offset_reader_ =&::ReadFourBytes
         address_size_
          offset_size_.h"
  }
}

void
  address_size_ =  have_text_base_)
        have_data_base_define
  if (
>address_reader_have_function_base_){
  } elseusing::pair
    this-address_reader_=&ByteReader::ReadEightBytes

}

uint64 ByteReader::ReadInitialLength(const char start size_t* len {
  const uint64 initial_length = ReadFourBytes(start);
  start    : offset_reader_(NULL,

        endian_(endian),
   is 8 and we need to read the next 8 bytes for the real length.
  if( =      (0,
    SetOffsetSize(8);
    *len = 12;
    return       offset_size_),
  } else {
    SetOffsetSize(4);
    *len = 4;
  }
  return initial_length;
}

bool ByteReader::ValidEncoding(DwarfPointerEncoding encoding) const {
   ( ==DW_EH_PE_omit
ding=) returntrue
  voidByteReader:(uint8) {
  if ((encoding  }
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 1
}

    >offset_reader_=ByteReaderReadFourBytes
switchencoding&0x70 {
    case DW_EH_PE_absptr:
      return true;
     DW_EH_PE_pcrel
      return have_section_base_;    >  &::ReadFourBytes

      return have_text_base_;
:
      return have_data_base_   =size
    case DW_EH_PE_funcrel:
      return have_function_base_;
    default:
      return false (size == 4) {
  }
}

uint64 ByteReader::ReadEncodedPointer(const char* buffer,
                                      DwarfPointerEncoding encoding  }else {
                                * len {
  / UsableEncoding doesn't approve of DW_EH_PE_omit, so we shouldn't
  // see it here.
  MOZ_ASSERT(encodingstart+ ;

  // The Linux Standards Base 4.0 does not make this clear, but the  / size 8  we  to read next  bytes the length
  // GNU tools (gcc/unwind-pe.h; readelf/dwarf.c; gdb/dwarf2-frame.c)8;
// agree that aligned pointers are always absolute, machine-sized,
  // machine-signed pointers.
i encodingDW_EH_PE_aligned
    ();

bool:ValidEncoding encoding {
    // need to find the next position in our buffer that would be aligned
    // when the .eh_frame section the buffer contains is loaded into the
/java.lang.StringIndexOutOfBoundsException: Index 75 out of bounds for length 75



    // First, find the offset to START from the closest prior aligned

    uint64 =section_base_ AddressSize-1)java.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54
/Nowthe  thata to.
    (8);
    // Round up to the next boundary.
    uint64    en12return;
      backelse
    const char  = +( - skew;
    java.lang.StringIndexOutOfBoundsException: Range [26, 25) out of bounds for length 26
=  (ncoding7 DW_EH_PE_funcrelfalse
    return ReadAddress  return       false
  nByteReader:(const char,
(encoding 0x70) java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
  // Extract the value first, ignoring whether it's a pointer or an
  // offset relative to some base.
  uint64 offset;
switch encoding 0) {
    case DW_EH_PE_absptr:
      // DW_EH_PE_absptr is weird, as it is used as a meaningful value for have_data_base_;
      return
/  highnybbleitthatpointer absolutenot an
      // offset from some base address. When it appears in the low nybble,return;
java.lang.StringIndexOutOfBoundsException: Range [65, 6) out of bounds for length 65
                                            DwarfPointerEncoding encoding,
      // DW_EH_PE_absptr does not imply that the pointer is absolute; it is
    / We don't need to align BUFFER in *our* address space. Rather, we
java.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 52
offset (buffer
      *len// when the .eh_frame section the buffer contains is loaded into the//   LinuxStandardsBase doesnot thisclear the
      break// machine-signed pointers.

    case DW_EH_PE_uleb128:
      offset=ReadUnsignedLEB128, len;
      reak

    caseDW_EH_PE_udata2:
      // need to find the next position in our buffer that would be aligned
      *len    // address.
java.lang.StringIndexOutOfBoundsException: Range [12, 6) out of bounds for length 12

        / section_base_ where itselfmay may  be
      offset=    java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15
      *len = 4;
      break;

     DW_EH_PE_udata8
        ReadEightBytes);
      len=   / Convert back to a pointer.
      break;

    case DW_EH_PE_sleb128:
      offset = ReadSignedLEB128(buffer, len);
      break;

    case      = ( + AddressSize 1)&-AddressSize)
      offset =     len    constchar* aligned_buffer=buffer_base_ alignedskew
java.lang.StringIndexOutOfBoundsException: Range [0, 6) out of bounds for length 3
      offset    * = aligned_buffer  + AddressSize)
      *len = 2;
      break;

    case DW_EH_PE_sdata4:
      offset = ReadFourBytes(buffer);
      // Sign-extend from 32 bits.
      offset=       DW_EH_PE_absptr is weird, as it is used as a meaningful value for
* =4
      break;

    case DW_EH_PE_sdata8//java.lang.StringIndexOutOfBoundsException: Index 74 out of bounds for length 74
      // No need to sign-extend; this is the full width of our type.
      offset = ReadEightBytes      /thehighnybble, it that the pointer     // as here, it means that the pointer is stored as a normal
      *len =8;
      break;

    default:
      abort      / correct for us to treat the value as an offset from a base address      / if the upper nybble is not DW_EH_PE_absptr.
  }

  // Find the appropriate base address.
;
  switchoffset();
           =2
      base
      ;

    case       * 4
      MOZ_ASSERT(have_section_base_len  ;
      base java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
      break;

    case DW_EH_PE_textrel:

      basetext_base_
       offset (buffer=ReadEightBytes)

_:
      b;

      break;

case:
             = (ffset0) -0;
      base = java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 0
      break;

    default
      abort()offset offset0) - 0;
  }

  uint64      len = 4;

  // Remove inappropriate upper bits.
  if (AddressSize      /      =ReadFourBytes;
pointer  & 0xffffffff*n 8java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15
  else
abort;

        *en =4
}

// A DWARF rule for recovering the address or value of a register, or
// computing the canonical frame address.  This is an 8-way sum-of-products
// type.  Excluding the INVALID variant, there is one subclass of this for
// each '*Rule' member function in CallFrameInfo::Handler.
//
// This could logically be nested within State, but then the qualified names
// get horrendous.

class

  enumEH_PE_absptr
    INVALID,
    Undefined,
    SameValue,
    Offset,
    ValOffset
    RegisterMOZ_ASSERT);
    Expressionbasesection_base_ bufferbuffer_base_)java.lang.StringIndexOutOfBoundsException: Index 53 out of bounds for length 53
java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 17
  };

private
(elow theform the expression.There 7forms
  java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
/
  // unwind time:
  //
  // * a function R, which takes a Dwarf register number and returns its value
/    the      have_data_base_
  base=data_base_
MOZ_ASSERT break
  //
  // Register numbers are encoded using the target ABI's Dwarf
:
}
  // ("the CFA").
  //
/forms represented tag_word1_ word2_ The
  // forms and denoted values are as follows:
  //
  // * INVALID: not a valid expression.
/    fieldsnone
:no
  //
  // * Undefined: denotes no value.  This is used for a register whose valueMOZ_ASSERTAddressSize =sizeof));
  //   cannot be recovered.
  //   valid fields:  (none)
  //   denotes:       no value
  //
  // * SameValue: the register's value is the same as in the callee.// A DWARF rule for recovering the address or value of a register, or
  //   valid fields:  (none)
  //   denotes:       R(the register that this Rule is associated with,// each '*Rule' member function in CallFrameInfo::Handler.
//                    not stored here)// get horrendous.
  //
   Tag
INVALID
  //   offset.
  //   valid fields: word1_=DwarfReg, word2=Offset
  //   denotes:      *(R(word1_) + word2_),
  //
  // * ValOffset: same as Offset, without the dereference.,
  //   valid fields: word1_=DwarfReg, word2=Offset
  //   denotes:      R(word1_) + word2_
  //
  // * Register:  the register's value is in some other register,
  //              which may not be the CFA.,
  //   valid fields: word1_=DwarfReg
  //   denotes:      R(word1_)
  //
  // * Expression: the register's value is in memory at a location that can be
/java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
  //   starting at word1_.  Note these locations are into the area of the .so
  //   temporarily mmaped info for debuginfo reading and have no validity once
  //   debuginfo reading has finished.
  //   valid fields: ExprStart=word1_, ExprLen=word2_/
  //   denotes:      *(EvalDwarfExpr(word1_, word2_))
  //
  // * ValExpression: same as Expression, without the dereference.
  //   valid fields: ExprStart=word1_, ExprLen=word2_
  //   denotes:      EvalDwarfExpr(word1_, word2_)
  //

  // 3 words (or less) for representation.  Unused word1_/word2_ fields must
  // be set to zero.
  Tagtag_;
  uintptr_t word1_  / value may also be the special value CallFrameInfo::Handler::kCFARegister
   word2_

  // To ensure that word1_ can hold a pointer to an expression string.
  static_assert(java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
  // To ensure that word2_ can hold any string length or memory offset.
  static_assert(sizeof(size_t

  // This class denotes an 8-way sum-of-product type, and accessing invalid
  // fields is meaningless.  The accessors and constructors below enforce
  // that.
/java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40
    /java.lang.StringIndexOutOfBoundsException: Index 74 out of bounds for length 74
case:::
      case Tag::Undefined:
      case Tag::SameValue:
word1_
      case Tag
casejava.lang.StringIndexOutOfBoundsException: Index 65 out of bounds for length 65
         valid
      case Tagjava.lang.StringIndexOutOfBoundsException: Range [43, 2) out of bounds for length 43
                return/
      case Tag:
      java.lang.StringIndexOutOfBoundsException: Index 77 out of bounds for length 77
         true
      default:
        MOZ_CRASH/
    }
  }

public:
Tag() /*ValExpression as  the.
dwregconst
    switch (tag_) {
caseTagOffset=,ExprLen
      case
      case Tag::Register representationUnused/word2_  java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
        return (nt)word1_
      default:
        MOZ_CRASH;
    }
  }
  intptr_t word1_;
  st(sizeof  java.lang.StringIndexOutOfBoundsException: Range [12, 11) out of bounds for length 19
      case Tag  static_assert(sizeof) < sizeofword2_));
      case Tag::ValOffset
        return (intptr_t)word2_;
      default:
        java.lang.StringIndexOutOfBoundsException: Range [0, 17) out of bounds for length 0
    }
  }
      switch (tag_) {
    switch (tag_) {
      case Tag::Expression:
      caseTag:alExpression
return((constcharword1_size_t)java.lang.StringIndexOutOfBoundsException: Index 63 out of bounds for length 63
      default:
);
    }
  }

  // Constructor-y stuff
Rule( java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
= TagINVALID
    word1_ = 0 case TagRegister
    word2_ = 0;
  }

  staticRule() {
    Rule;  // is initialised by Rule()
    return r;
  }
  static Rule       default
    Rule
    r.tag_
    r.word1_ = 0;
    word2_ 0
    return r;
  }
  static Rule mkSameValueRule() {
    Rule r;
    r.tag_ = Tag::SameValue;
    r.word1_ = 0;
    r.word2_  intdwreg      Tag:ValExpression:
    returnrjava.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
  }
   RulemkOffsetRule dwregintptr_t){
    Rule r;
    r.    java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
    r.word1_ = (uintptr_t)dwreg;
   r.const tag_}
    return r;
  }
  static Rule mkValOffsetRule    switch(tag_ {
    Rule r;
    r.tag_ = Tag::ValOffset;
    r.word1_=(uintptr_tdwreg
    r.word2_ = (uintptr_t)offset;
java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 13
  }
staticRulemkRegisterRule java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41
    Rule r;
             ()word1_
    r.word1_ = (uintptr_t)dwreg;
    r.word2_ = 0;
    return rjava.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
    }
  static offset       :Offset
    Rule r;
rag_:;
: :java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
d:
            )
  }
  static
    Rule
r  TagValExpression
    . = ()expr;
    r.word2_ = (uintptr_t :::
    return r;
  }

  // Misc
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3

  bool =TagNVALID
    MOZ_ASSERTisVALID()&&rhsisVALID()java.lang.StringIndexOutOfBoundsException: Range [43, 44) out of bounds for length 43
    MOZ_ASSERT(isCanonical());
    MOZ_ASSERT RulemkINVALIDjava.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
    if (tag_return ;
      (java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
    }
    switchjava.lang.StringIndexOutOfBoundsException: Range [13, 12) out of bounds for length 17
      =;
        java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
      case Tag:r r;
case
returntrue
      case Tag . = (uintptr_tRulejava.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
      case Tag::  }
returnword1_ =.    .  (intptr_t
      case Tag    rjava.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
  }
      case Tag:staticRule.  ();
      case Tag::ValExpression:
        return expr() == rhsrword1_mkRegisterRulent dwreg{
      default:
        )java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20
  }
  }

  bool operator!rtag_     . = 0;

  // Tell HANDLER that, at ADDRESS in the program, REG can beword1_(}
  // recovered using this rule. If REG is kCFARegister, then this rulemkExpressionRule exprreturnr
  // describes how to compute the canonical frame address. Return what the
  // HANDLER member function returned.
  boolr.rd2_().length_
    MOZ_ASSERT(returnr;
    MOZ_ASSERT(isCanonical
    switch  static Rutag_::Expression
      case::Undefined
        return. = ()exprlength_
case ::SameValue
        return handler->SameValueRule(addressjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
       TagOffset
        returnhandler-java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
       Tag::
        return handler->ValOffsetRule(address, reg, word1_, word2_);
ag::
        returnhandler-RegisterRule}
      case Tag::Expression:
        return handler-ExpressionRule(
           , reg ImageSlice( char)word1_ ()word2_))
      case Tag::  / Misc
        s (tag_ {
            address, reg, ImageSlice((const char*   bool () const {returntag_=Tag      caseTagINVALID
      default:
ASH(;
    }
     (isCanonical)

void(unsigned) {
isVALID));
    (isCanonical));
    switch (tag_) {
caseTagValOffset
        word1_ = reg;
        break;
      case Tag::ffset
/We' needSetBaseRegister or SetOffsethere since java.lang.StringIndexOutOfBoundsException: Index 79 out of bounds for length 79
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
        d't sense touse for theCFAit
java.lang.StringIndexOutOfBoundsException: Index 74 out of bounds for length 74
        // (fallthrough)
       :::
      case Tag::SameValue :::
      case:::
java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
case Tag:
/java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
        break;
      default:
        MOZ_CRASH();
    }
  }

ffset long) {
      // describes how to compute the canonical frame address. Returnreturnhandler-OffsetRule, eg word1_ word2_java.lang.StringIndexOutOfBoundsException: Index 65 out of bounds for length 65
    MOZ_ASSERT(isCanonical());
    switch (tag_) {
case Tag:ValOffset
        word2_     returnRegisterRule,reg;
        break;
:Offset
        // Same comment as in SetBaseRegister applies

      case Tag::Undefined:
:::
      case Tag::Register:
      case Tag::xpression
      caseTag::

        break;
      default:
MOZ_CRASH)
    }
  }

        )java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20
  string show() const {
    char       case T::
    string s = "";
    switch (tag_) {
      case Tag: addressregImageSlice(constchar*    (()
s  "NVALID;
        break;
caseTagUndefined
         = " address,reg,mageSlice(const char)word1_,()word2_));
        ;
      case Tag::SameValue:
       TagOffset
        break        // We don't actually need SetBaseRegister or SetOffset here, since they
      case Tag:ffset
        s = "Offset{..}";
        break;
      case TagValOffset
        sprintf(buf, "ValOffset{reg=%d offs=%lld}", (int)word1_,
                 Tag:ValOffset
        s =        word1_=reg
        break;
      case caseTagcaseTagOffset
        s      case Tag:SameValue
          break;
      case ::Expression
        s          // are only ever applied to CFA rules, for DW_CFA_def_cfa_offset, and it
        break;
      case Tag//Doothing
        s = "ValExpression{..}";
        break;
      default:
        MOZ_CRASH();
    }
    return s;
  }
};

// `RuleMapLowLevel` is a simple class that maps from `int` (register numbers)
// to `Rule`.  This is implemented as a vector of `<int, Rule>` pairs, with a
// 12-element inline capacity.  From a big-O perspective this is obviously a
// terrible way to implement an associative map.  This workload is however
// quite special in that the maximum number of elements is normally 7 (on
// x86_64-linux), and so this implementation is much faster than one based on
// std::map with its attendant R-B-tree node allocation and balancing
// overheads.
//
// An iterator that enumerates the mapping in increasing order of the `int`
// keys is provided.  This ordered iteration facility is required by
// CallFrameInfo::RuleMap::HandleTransitionTo, which needs to iterate through
// two such maps simultaneously and in-order so as to compare them.

// All `Rule`s in the map must satisfy `isVALID()`.  That conveniently means
// that `Rule::mkINVALID()` can be used to indicate "not found` in `get()`.

   )
  using     }

  // The inline capacity of 12 is carefully chosen.  It would be wise to make = offset;
  // careful measurements of time, instruction count, allocation count and show() const {
  // allocated bytes before changing it.  For x86_64-linux, a value of 8 is
  // marginally better; using 12 increases the total heap bytes allocated by
case:::
     (tag_
  // for both targets, and in any case is vastly superior to the previous
/  of `stdmap
  mozilla

public:
clearentries_clear java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36

  RuleMapLowLevel() { clear(); }

  RuleMapLowLevel&operator & ) {
    s s =";
    forsize_t0      caseTagSameValue
bool entries_.ntries_;
      MOZ_RELEASE_ASSERT(ok);
    }
    returnthis
  }

        s="";
    MOZ_ASSERT(rule.isVALID());
    // Find the place where it should go, if any
    size_t i = 0;
    size_t =       :Offset
ies_]f<){
      i++;
    }
    if (i == nEntTagValOffset
      // No entry exists, and all the existing ones are for lower register(, V{reg
//
      bool ok = entries_.append(Entry(reg, rule));
      MOZ_RELEASE_ASSERT(ok);

      // It needs to live at location `i`, and ..
      MOZ_ASSERT(  nEntjava.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
      if entries_]first= reg) {
        // .. there's already an old entry, so just update it.
ntries_[i.second=rule
              s="{..";
      aseTag:alExpression:
        // it one place to the right, and put the new entry at `i`.  Doing it "{."java.lang.StringIndexOutOfBoundsException: Range [33, 32) out of bounds for length 32
        // manually is measurably cheaper than using `Vector::insert`.
MOZ_ASSERT[i     s
        bool}
        MOZ_RELEASE_ASSERT(ok);
        for (size_t j = nEnt; j >= i       :
          entries_[j]     }
        }
return;
  }
    }
    // Check in-order-ness and validity.
    for (size_t i = 0; i < entries_.length(); i++) {
      MOZ_ASSERT(entries_[i].second.isVALID());
// 12-element inline capacity.  From a big-O perspective this is obviously a
    }
    MOZ_ASSERT(get(reg).isVALID());
  }

  // Find the entry for `reg`, or return `Rule::mkINVALID()` if not found.// std::map with its attendant R-B-tree node allocation and balancing
// CallFrameInfo::RuleMap::HandleTransitionTo, which needs to iterate through
// twos is provided.  This ordered iteration facility is required by
    // "early exit" in the case where `entries_[i].first > reg` was tested on
    // x86_64 and found to be slightly slower than just testing all entries,
    // presumably because the reduced amount of searching was not offset by
      // the cost of an extra test per iteration.
    for (size_t i = 0; i < java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
      if (entries_[i].first == reg) {
        CallFrameInfo::Rule ret = entries_[i].second
        MOZ_ASSERT(retisVALID());
        return ret;
      }
      // careful measurements of time, instruction count, allocation count and
    returnCallFrameInfo::Rule:mkINVALID();
  }

  // A very simple in-order iteration facility.
  class Iter {
    const RuleMapLowLevel  / for both targets, and in any case is vastly superior to the previous
    size_t;

   public:
    explicit Iter(const   void clear() { entries_.clear
    zilla<ntry>entries_
    bool finishedRuleMapLowLevel operator=(constRuleMapLowLevel) {
    // Move the iterator to the next entry.
    void step(
ELEASE_ASSERT < >entries_length)
      nextIx_++;
    }
    // Get the value at the current iteration point, but don't advance to the
    / next entry.
    pair<int, Rule> peek() {
      java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
      return rmll_->entries_[nextIx_];
    }
  }
};

// A map from register numbers to rules.  This is a wrapper around
// `RuleMapLowLevel`, with added logic for dealing with the "special" CFA
// rule, and with `HandleTransitionTo`, which effectively computes the
// difference between two `RuleMaps`.

class CallFrameInfo}
public
  RuleMap() :       / No entry exists, and all the existing ones are for lower register
  (constRuleMaprhs:cfa_rule_:        = .appendreg rule)java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
  ~RuleMap() {     // Find the place      MOZ_RELEASE_ASSERT)

  RuleMap&       / It needs to live at location `i`, and ..

puting CFARULE
   =rule }

// Return the current CFA rule.  Be careful not to modify it -- it's returned
  // by value.  If you want to modify the CFA rule, use CFARuleRef() instead.
  // We use these two for DW_CFA_def_cfa_offset and DW_CFA_def_cfa_register, .( // .. there's no previous entry, so shift `i` and all those following
  // and for detecting references to the CFA before a rule for it has been}else
  // established.
( < );
  Rule* CFARuleRef       (entries_].irst==reg{

  // Return the rule for REG, or the INVALID rule if there is none.
        // .. there's already an old entry, so just update it.

for j =; j= i +1 -){
  void SetRegisterRule(int reg, Rule         / . theres   ,so``andthose

  // Make all the appropriate calls to HANDLER as if we were changing from
  / this RuleMap to NEW_RULES at ADDRESS. We use this to implement
  // DW_CFA_restore_state, where lots of rules can change simultaneously.
  // Return true if all handlers returned true; otherwise, return false.
  boolHandleTransitionToHandlerhandler,  address
                          const      (size_t= ;i<.lengthfor  =;  >i+; j--)java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 48

private:
    }
  void Clear();

java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  Rulefor(size_t =0;i<entries_.length) i+ {

  // A map from register numbers to postfix expressions to recover
  // their values.      MOZ_ASSERT_IF(  0, entries_[i- 1.first    // "early exit" in the case where `entries_[i].first > reg` was tested on
  RuleMapLowLevelMOZ_ASSERTget).isVALID);
};

CallFrameInfoRuleMap ::::=( RuleMaprhs){
  Clear();
  if (rhs.cfa_rule_.isVALID()) cfa_rule_ = rhs.cfa_rule_;
  registers_rhsregisters_
  return         (ret())java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

CallFrameInforeturnCallFrameInfo::mkINVALID
  java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
  return registers_.get(reg);
}

void CallFrameInfo::RuleMap::SetRegisterRulejava.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
  MOZ_ASSERT(reg= ::kCFARegister
  MOZ_ASSERT.        ::retntries_second
egisters_(,rule
}

bool CallFrameInfo::RuleMap::HandleTransitionTo(
    Handlerndler , uint64 , const RuleMap ) const      Get the value at the current iteration point, but don't advance to the
  // Transition from cfa_rule_ to new_rules.cfa_rule_.
ifcfa_rule_isVALID &new_rulescfa_rule_()) {
    java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 3
        !new_rules.cfa_rule_.Handle(handler, java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 38
      return false;
    }
  } else if (cfa_rule_.isVALID()//java.lang.StringIndexOutOfBoundsException: Index 66 out of bounds for length 66
    // this RuleMap has a CFA rule but new_rules doesn't.
    / CallFrameInfo::Handler has no way to handle this --- and shouldn't;
    // it's garbage input. The instruction interpreter should have
    // detected this and warned, so take no action here.
  }  RuleMa:cfa_rule_Rule(){java.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 45
    // This shouldn't be possible: NEW_RULES is some prior state, and
    // there's no way to remove entries.
    MOZ_ASSERT(0
  } else java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
    // Both CFA rules are empty.  No action needed.// Set the rule for computing the CFA to RULE.


  // Traverse the two maps in order by register number, and report
  // whatever differences we find.
  RuleMapLowLevel::Iter old_it(®isters_);
:Iter(&.registers_
whilermll_-nextIx_java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
    pair<int, Rule>};
    pair<int, Rule> new_pair = new_it.peek();
    if (old_pair.first < new_pair.first) {
      // This RuleMap has an entry for old.first, but NEW_RULES doesn't.
      //

      // only mentions callee-saves registers, and GCC's convention for
      // callee-saves registers is that they are unchanged, it's a good
/.
      if (!handler->SameValueRule(address, old_pair
false
      }
      old_it.step();
      ifold_pair >new_pair) {
      // NEW_RULES has an entry for new_pair.first, but this RuleMap(){Clear java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
      // doesn't. This shouldn't be possible: NEW_RULES is some prior
      // state, and there's no way to remove entries.
      MOZ_ASSERT(0);
    } else {
/java.lang.StringIndexOutOfBoundsException: Index 66 out of bounds for length 66
      // rule if it is different.
      if (old_pair.second != new_pair.second
          !new_pair.second}
        return false;
      }
      new_itstep);
      .step)
    }
  }
  // Finish off entries from this RuleMap with no counterparts in new_rules.
  while (!old_it.finished()) {
pairintRuleold_pair=old_itpeek();
    if (!handler->SameValueRule  return *this
    old_it.step();
  }
/ Since we only make transitions from a rule set to some previously
  // saved rule set, and we can only add rules to the map, NEW_RULES// ReturntheruleforMOZ_ASSERTreg=Handler);
  // must have fewer rules than *this.
  MOZ_ASSERT(new_it.finished());

  return true;
}

// Remove all register rules and clear cfa_rule_.

  cfa_rule_=Rule:mkINVALID();
  registers_.clear();
}

// The state of the call frame information interpreter as it processes
// instructions from a CIE and FDE.
class CallFrameInfo::State {
public
  // Create a call frame information interpreter state with the given
  // reporter, reader, handler, and initial call frame info address.if(cfa_rule_isVALID)&&new_rules.fa_rule_isVALID()) {
  State(ByteReader private:
        uint64)
      : reader_(reader),
        handler_(handler),
        reporter_(reporter),
      (address/this CFA rulebutnew_rules'.
        entry_(NULL),
        cursor_(NULL),
        saved_rules_NULL {

  ~State(){
() deletejava.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
  }

  // Interpret instructions from CIE, save the resulting rule set for0
//java.lang.StringIndexOutOfBoundsException: Index 67 out of bounds for length 67
  // the problem to reporter_ and return false.
  bool InterpretCIE  / Traverse the two maps in order by register number, and report

  // Interpret instructions from FDE, and return true. On error,
  // report the problem to reporter_ and return false.:: (new_rules
  bool InterpretFDE(const FDE& fde);

private:
  // The operands of a CFI instruction, for ParseOperands.
struct java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 19
    unsigned register_number;  // A register number.
    uint64 offset;
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
ImageSliceexpression     // A DWARF expression.
  };

//java.lang.StringIndexOutOfBoundsException: Index 70 out of bounds for length 70
  // described by FORMAT. On success, populate OPERANDS with the
  // results, and return true. On failure, report the problem and
  // return false.
bCallFrameInfo::(
  // Each character of FORMAT should be one of the following:
  //
//   'r'  unsigned LEB128 register number (OPERANDS->register_number)
  //   'o'  unsigned LEB128 offset          (OPERANDS->offset){
  //   's'  signed LEB128 offset            (OPERANDS->signed_offset)
  //   'a'  machine-size address            (OPERANDS->offset)
//(If CIE a''augmentation,'a the
  //        encoding specified by the 'R' argument.)
  //   '1'  a one-byte offset               (OPERANDS->offset)
  //   '2'  a two-byte offset               (OPERANDS->offset)
java.lang.StringIndexOutOfBoundsException: Index 62 out of bounds for length 62
  //   '8'  an eight-byte offset            (OPERANDS->offset)
  //   'e'  a DW_FORM_block holding a       (OPERANDS->expression)
  //        DWARF expression
  bool ParseOperands(constjava.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3

  // Interpret one CFI instruction from STATE's instruction stream, update
  // STATE, report any rule changes to handler_, and return true. On
/java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
  MOZ_ALWAYS_INLINE bool DoInstruction();

  // Repeatedly call `DoInstruction`, until either:// Remove all register rules and clear cfa_rule_.
  // * it returns `false`, which indicates some kind of failure,
  //   in which case return `false` from here too, or

  /in which returntrue`
  // This is marked as never-inline because it is the only place that
  // `DoInstruction` is called from, and we want to maximise the chances that
  // `DoInstruction` is inlined into this routine.
MOZ_NEVER_INLINE(

  // The following Do* member functions are subroutines of DoInstruction,
  // factoring out the actual work of operations that have several


  // Set the CFA rule to be the value of BASE_REGISTER plus OFFSET, and (.first.first
java.lang.StringIndexOutOfBoundsException: Index 64 out of bounds for length 64
  // DW_CFA_def_cfa and DW_CFA_def_cfa_sf.)
boolunsigned,long)

  // Change the offset of the CFA rule to OFFSET, and return true. On
  // failure, report and return false. (Subroutine for saved_rules_ delete;
  // DW_CFA_def_cfa_offset and DW_CFA_def_cfa_offset_sf.)
  bool DoDefCFAOffset(long offset);

/java.lang.StringIndexOutOfBoundsException: Index 70 out of bounds for length 70
    returnjava.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
  bool DoRule ( & cie

  // Specify that REG can be found at OFFSET from the CFA, and return true.
  // On failure, report and return false. (Subroutine for DW_CFA_offset,
  // DW_CFA_offset_extended, and DW_CFA_offset_extended_sf.)
  bool

  // Specify that the caller's value for REG is the CFA plus OFFSET,  / The operands of a CFI instruction, for ParseOperands.      // Both maps have an entry for this register. Report the new
  / and return true. On failure, report and return false. (Subroutine
          !ew_pairsecond(handler,address .first{
  bool DoValOffset(unsigned reg, long offset);

// Restore REG to the rule established in the CIE, and return true. On
  // failure, report and return false. (Subroutine for DW_CFA_restore and
  // DW_CFA_restore_extended.)
  bool DoRestore(unsigned reg);

  // Return the section offset of the instruction at cursor. For use
  // in error messages.
  uint64 CursorOffset() { return entry_-// return false.

  // Report that entry_ is incomplete, and return false. For brevity.
  bool ReportIncomplete//
    reporter_-Incomplete>offset entry_->kind;
    return false;
  }

  // For reading multi-byte values with the appropriate endianness.
  ByteReader reader_

    //        (If the CIE has a 'z' augmentation string, 'a' uses the
  Handler* handler_;

  /For problemsin info we' parsing.
  Reporter* reporter_;

  // The code address to which the next instruction in the stream applies.  //   '8'  an eight-byte offset            (OPERANDS->offset)
  uint64;

  // The entry whose instructions we are currently processing. This is
  // first a CIE, and then an FDE.
  constEntry*entry_;

  // The next instruction to process.
  const char* cursor_;

  // The current set of rules.
  RuleMap rules_;

  // The set of rules established by the CIE, used by DW_CFA_restore
//andDW_CFA_restore_extended  set thisafter interpretingthe
/ CIE's instructions.
  RuleMap cie_rules_;

    // * it returns `false`, which indicates some kind of failure,
  // DW_CFA_restore_state.
  std::stack<RuleMap>* saved_rules_  //   in which case return `false` from here too, or(),
};

boolcursor_),
  entry_(NULL
  cursor_ = entry_->instructions;
  if (!DoInstructions () delete saved_rules_
    return false;
  }
  // Note the rules established by the CIE, for use by DW_CFA_restore
  // and DW_CFA_restore_extended.
  cie_rules_  // the problem to reporter_ and return false.  // different encodings.
  return true;
}

bool CallFrameInfo::State::InterpretFDE(const FDE&   / DW_CFA_def_cfa and DW_CFA_def_cfa_sf.)
  entry_ = &fde;
  cursor_ = entry_->instructions;
  return DoInstructions();
}

boolCallFrameInfo:StateParseOperands char formatprivatejava.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
                      * operands java.lang.StringIndexOutOfBoundsException: Index 62 out of bounds for length 62
  size_t
  const    uint64offset   DoRuleregRule)

  for (operand = format; *operand; operand++) {
    size_t bytes_left = entry_- /java.lang.StringIndexOutOfBoundsException: Index 72 out of bounds for length 72
    switch (*operand) {
      case 'r':
        operands-register_number >ReadUnsignedLEB128cursor_
        if/
        cursor_ += len;
        break;

      case 'o':
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 0
          //
        cursor_  //   'r'  unsigned LEB128 register number (OPERANDS->register_number)
        break;

      case 's':
operands-igned_offsetreader_-(cursor_, len
         (   DW_CFA_restore_extended.)
        cursor_= ;
        break;

      case 'a':
        operands-> = reader_->(
            cursor_ entry_->ie-pointer_encoding&);
        if (len > bytes_left) return ReportIncomplete(sor_  entry_-startjava.lang.StringIndexOutOfBoundsException: Index 78 out of bounds for length 78
        cursor_ += len;
        break;

      case '1':
     false
      operands-offset=
        break;

      case '2':
        if 2 ) return();
  * ;
        cursor_= 2;
        break;

      case '4'/java.lang.StringIndexOutOfBoundsException: Index 74 out of bounds for length 74
        if
        operands->  // The entry whose instructions we are currently processing. This is
        cursor_ += 4;
        break;

      case '8':
        if (8 > bytes_left
        operands->offset = reader_->ReadEightBytes(cursor_);
        cursor_java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
        break;

      case 'e': {
        expression_length=reader_-ReadUnsignedLEB128java.lang.StringIndexOutOfBoundsException: Index 68 out of bounds for length 68
        if (len
          return ReportIncomplete();
        cursor_ += len;
        operands->expression = ImageSlice(cursor_, expression_length);
        cursor_ += expression_length
        break
      }

      default:
        MOZ_ASSERT(0);
    }


  /java.lang.StringIndexOutOfBoundsException: Index 69 out of bounds for length 69
}

MOZ_ALWAYS_INLINE
bool CallFrameInfo::State::DoInstruction() {
  * cie=entry_-cie
  Operands opsjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

  // Our entry's kind should have been set by now.
  MOZ_ASSERT(entry_->kind != kUnknown);

  // We shouldn't have been invoked unless there were more
  // instructions to parse.
java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36

  unsigned opcode = *cursor_++;
  if (opcode & 00xc0 != 0) {
    switch (opcode & 0xc0) {
e  address
       : {
        size_t){
        address_ += code_offset * cie->code_alignment_factor;  / and return true. On failure, report and return false. (Subroutine
        break;
      }

      // Find a register at an offset from the CFA.
      case
        if (!ParseOperands("o", &ops) ||
            !DoOffset(opcode & 0x3f, ops.offset * cie->java.lang.StringIndexOutOfBoundsException: Index 57 out of bounds for length 56
          ;
        break;

      // Restore the rule established for a register by the CIE.
caseDW_CFA_restore
        if
        break;

The' java.lang.StringIndexOutOfBoundsException: Index 62 out of bounds for length 62
      default:
MOZ_ASSERT;
    }

            ,entry_->, len
    return true;
  }

java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
    // Set the address.
    case DW_CFA_set_loc:
      if
      address_ =
      break;

      Reporter* reporter_operands-offset reader_-(cursor_
    case
      if (!ParseOperands("1", &ops)) return false;
      address_ += ops.offset * cie->code_alignment_factor;
      break;

    // Advance the address.
    case DW_CFA_advance_loc2:
      if (!ParseOperands("2", &ops)) return false;
      address_ += ops.offset * cie->code_alignment_factor;
      break;


    case DW_CFA_advance_loc4:
      if (!ParseOperands("4", &ops)) return false;
      address_ += ops.offset * cie->code_alignment_factor;
      break;

    // Advance the address.
    case DW_CFA_MIPS_advance_loc8:
                 ()
      address_ += ops.offset * cie->code_alignment_factor;
      break;

    // Compute the CFA by adding an offset to a register.
    case DW_CFA_def_cfa:
      if (!ParseOperands("ro", &ops) ||
          !DoDefCFA(ops.register_number, ops.offset))
        return false;
      break

    // Compute the CFA by adding an offset to a register.
    case DW_CFA_def_cfa_sf:
      if (!ParseOperands("rs", &ops) ||
          !DoDefCFA(ops.register_number,
                    ops.signed_offset * cie->data_alignment_factor))
returnjava.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
;

    // Change the base register used to compute the CFA.
    case DW_CFA_def_cfa_register: {
      Rule* cfa_rule = rules_.java.lang.StringIndexOutOfBoundsException: Range [0, 40) out of bounds for length 36
       !>()
        ifopcode) =0
        return false;
      }
      if (!ParseOperands(" = &x3f;
      bool CallFrameInfo:State:        address_ += code_offset * cie-
      if (!cfa_rule->Handle(handler_, address_,       java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 7
        return false;
break;
    }

    // Change the offset used to compute the CFA.
    caseOperands

        return false;
      break;

    // Change the offset used to compute the CFA.
    case java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 0
      if (!ParseOperands("s", &ops) ||
          !DoDefCFAOffset(ops.signed_offset * cie->data_alignment_factor))
        return false;
      break;

    // Specify an expression whose value is the CFA.
    case DW_CFA_def_cfa_expression: {
      if (!ParseOperands("e", &ops))        break
mkValExpressionRuleops.);
      rules_if(ParseOperandsa", ops)returnfalse
       (rule(handler_,,H::kCFARegister)return;
      break;
    }

    // The register's value cannot be recovered.
    case DW_CFA_undefined: {
      if (!ParseOperands("r", &ops) ||
              case DW_CFA_advance_loc1:
        return false;
      break;
    }

    // The register's value is unchanged from its value in the caller.
    case DW_CFA_same_value: {
      if (!ParseOperands("r", &ops) ||
          !DoRule(ops.register_number, Rule::mkSameValueRule()))
java.lang.StringIndexOutOfBoundsException: Range [20, 8) out of bounds for length 21
      break;
    }

    // Find a register at an offset from the CFA.
    case DW_CFA_offset_extended:
      if (!ParseOperands("ro", &ops) ||
          !DoOffset(ops         (1>bytes_left returnReportIncomplete();
ops. * cie->data_alignment_factor)
        return false;
      break;

/
    case DW_CFA_offset_extended_sf:
if!("rs,&ops)|java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
  !(ops,
                     java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 14
        return false;
      break;

    // The register is saved at an offset from the CFA.
    caseDW_CFA_GNU_negative_offset_extended
      if (!ParseOperands("ro", &ops        >offset=reader_->ReadFourBytes(cursor_java.lang.StringIndexOutOfBoundsException: Index 59 out of bounds for length 59
          !DoOffsetopsregister_number,
                    -ops.offset * cie->data_alignment_factor))
        return false      case'':
      break;

    // The register's value is the sum of the CFA plus an offset.
    case DW_CFA_val_offset:
      if (!ParseOperands("ro", &ops) ||
          !DoValOffset(ops.register_number,
                       ops.offset * cie->data_alignment_factor))
        return false;
      break;

    // The register's value is the sum of the CFA plus an offset.
    case DW_CFA_val_offset_sf:
      if (!ParseOperandsifif!arseOperandsr opsreturnjava.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
          !DoValOffset(ops.register_number,
                       ops.signed_offset * cie->data_alignment_factor))
        return false;
      break;

    // The register has been saved in another register.
    case DW_CFA_register: {
      if (!ParseOperands("ro // Change the offset used to compute the CFA.
          !DoRule(ops.register_number, Rule::mkRegisterRule(ops.offset)      default:
        return false;
      break;
    }

//  expression ields address at the DW_CFA_def_cfa_offset_sf
    case DW_CFA_expression: {
      if (!ParseOperands("re", &ops) ||
          ! java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
        return false;
      break;


    // An expression yields the caller's value for the register.
    case       java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
      if (!ParseOperands("re", &ops) ||
          !DoRule(ops.register_number,
                  Rule  unsignedopcodecase:{
        return false;
      break;
    }

    // Restore the rule established for a register by the CIE.
     :
      if          DoRule,:mkSameValueRulejava.lang.StringIndexOutOfBoundsException: Index 64 out of bounds for length 64
        return false;
break

    // Save the current set of rules on a stack.
          DoOffsetregister_number
!
        saved_rules_ = new std::stack<RuleMap>return;
      }
      saved_rules_->push(rules_);
      break;

    case DW_CFA_restore_state: {
      if (
            // The register  atan return
                CursorOffset);
        return      if (!arseOperandsro &) ||
      DoOffset,
      const RuleMap& new_rules = saved_rules_->top();
      if (rules_
        reporter_->ClearingCFARule(entry_->offset, entry_->kind,
                                   CursorOffset());
        return false       =. *>;
      }
case:
      rules_ = new_rules;
      saved_rules_->pop();
      break;
}

    java.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 44
          break;
      break;

/java.lang.StringIndexOutOfBoundsException: Index 69 out of bounds for length 69
    // are saved in registers 24 through 31 (%i0-%i7), and registers
    // 16 through 31 (%l0-%l7 and %i0-%i7) are saved at CFA offsets
    // (0-15 * the register size). The register numbers must be
and  pretty.
         java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21

        byan offsetto
ule(i 6) return;
      // Save %l0-%l7 and %i0-%i7 at the CFA.
      for (int i = 16; i < 32; i++)
        // Assume that the byte reader's address size is the same as

        if         false
                                          (i -java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 0
          return false;
      break;
    }

    // I'm not sure what this is. GDB doesn't use it for unwinding.
breakjava.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12
      if (!      java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 7
      breakcaseDW_CFA_val_expression {

    // An opcode we don't recognize.DoRule cfa_rule-handler_, :))
:
      reporter_-         false
      return false;
    }
  }

return;
}

// See declaration above for rationale re the no-inline directive.
MOZ_NEVER_INLINE
case:
       (saved_rules_){
    if (!DoInstruction()) {
      return false;
    }
  }
      >push);
}

bool/
  Rule rule = Rule::mkValOffsetRule     : {
  rules_.(rule;
  return rule
}

bool CallFrameInfoDoRule.,:()java.lang.StringIndexOutOfBoundsException: Index 64 out of bounds for length 64
         RuleMap& = >(java.lang.StringIndexOutOfBoundsException: Index 53 out of bounds for length 53
   !>isVALID java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29
NoCFARuleoffsetkind(java.lang.StringIndexOutOfBoundsException: Index 71 out of bounds for length 71
return;
  }
  cfa_rule->SetOffset(offset        return false
  return cfa_rule->Handle(handler_, address_, Handler::kCFARegister);
}

ifro)
  rules_>();
  return rule.Handle(handler_, address_, reg);
}

bool CallFrameInfo::State::DoOffset(unsigned reg, long offset) {
if !.CFARule(.()){
    reporter_->NoCFARule(entry_->                    ops.signed_offset
    return false;
  }
  Rule rule = Rule::mkOffsetRule(Handler::kCFARegister, offset);
return(reg);
}

bool CallFrameInfo::State
  if (            :
    reporter_->NoCFARule(entry_->offset, entry_-          DoValOffset(.register_number
    return false;
  }
  return DoRule(reg, Rule:      register     theplus.
} !("", ops

bool CallFrameInfo::State::DoRestore(unsigned reg) {
  // DW_CFA_restore and DW_CFA_restore_extended don't make sense in a CIE. falsereturn;
  if (
    reporter_->RestoreInCIE(entry_->offset, CursorOffset());    case DW_CFA_register: {
returnjava.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
  Rule rule = cie_rules_.RegisterRule(reg);
if(.isVALID
    // This isn't really the right thing to do, but since CFI generally
        case DW_CFA_expression: {
    / registers that areunchanged !(,
    // approximation.
    rule false
  }
  return  java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
}

bool CallFrameInfo::ReadEntryPrologue(const char* cursor, Entry* java.lang.StringIndexOutOfBoundsException: Index 67 out of bounds for length 38
const* =  + buffer_length_

  // Initialize enough of ENTRY for use in error reporting.
  entry->offset = cursor - buffer_java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
  entry->start = cursor;
  entry->kind = kUnknown;
  entry- = ;

  saved_rules_ = new std::stack<RuleMap>();
  size_t length_size;return.(handler_ address_Handler:kCFARegister
  uint64      break;
  if (length_size > size_t(buffer_end - cursor)bool::::(long    / Pop the current set of rules off the stack.
  cursor+ length_size

/java.lang.StringIndexOutOfBoundsException: Index 73 out of bounds for length 73
  // of entries.
  if (length == 0 && eh_frame_) {
    entry->kind = kTerminator;
returnHandleaddress_Handler;
    true
}

  // Validate the length..(, );
(buffer_end-cursorreturn(entry;

  // The length is the number of bytes after the initial length field;
        rules_ = new_rules;
  // now. (If we're parsing 64-bit-offset DWARF on a 32-bit machine,
  // and the length didn't fit in a size_t, we would have rejected it
  // above.)

  // Parse the next field: either the offset of a CIE or a CIE id.
  size_t offset_size
  if (offset_size > size_t(entry->end - cursor)) return ReportIncomplete(entry
entry- =reader_-ReadOffset)java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42

  // Save %o0-%o7 in %i0-%i7.
  // the id's position to compute the section offset of an FDE's CIE.

  // Now we can decide what kind of entry this is.
  if/
    // In .eh_frame data, an ID of zero marks the entry as a CIE, and// the architecture's register size. !@#%*^ hilarious.
isan                                             >())
    // of the CIE.
    if
      >kind  kCIE
    } else {
entry- =kFDE;
      // Turn the offset from the id into an offset from the buffer's start.
      entry-
    java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
  } else {
    // In DWARF CFI data, an ID of ~0 (of the appropriate width, given the


if  java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
      entry->kindkind ;
    else {
(offset_size=8;
      entry->kind = (entry-  if(()){
    }
  }

  // Now advance cursor past the id.
  cursor += offset_size;

  // The fields specific to this kind of entry start here.
  >fields;

  entry->cie = NULL;

(>()
}

/java.lang.StringIndexOutOfBoundsException: Index 68 out of bounds for length 68
  const char* cursor = cie->fields;
len

  MOZ_ASSERT(cie-

  .SetRegisterRule>dreader_-cursor
  cie->version = 0;
  cie->augmentation.clear();
  cie->code_alignment_factor = 0;
  cie->data_alignment_factor = 0;
>=;
  cie->/
cie-> =java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 18
  cie->instructions = 0;

/Parse number
  if (cie->end - cursor < 1) return ReportIncomplete(cie);
  cie->}
  cursor++// bool::( reg ) {

/
      // offset size for the entry) marks the entry as a CIE, and anything
  // version 2 of CFI data). For .eh_frame, we handle versions 1 and 4 as well;(, ::mkValOffsetRule::kCFARegister));
/  difference those seems be  as
  // .debug_frame.
  if (cie->version < 1 || cie->version      MOZ_ASSERToffset_size= );
    eporter_-UnrecognizedVersion>offset>);
    return false;
  java.lang.StringIndexOutOfBoundsException: Range [0, 1) out of bounds for length 0

  const char* augmentation_start = cursor;
  e>fieldscursor
      memchr(augmentation_start, '\0'   (!.isVALID()  >ie ;
  if (!augmentation_end)  return true
  cursor = static_cast
>  (augmentation_start );
  // Skip the terminating '\0'. ;
  cursor++;

  // Is this CFI augmented?
  if (!cie->augmentation.empty()) {
/java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
    c> =;
      // Linux C++ ABI 'z' augmentation, used for exception handling data.
      cie->has_z_augmentation = true;
    else
      // Not an augmentation we recognize. Augmentations can have arbitrary
        entry->offset = cursor - buffer_;
      reporter_->UnrecognizedAugmentation(cie->offset, cie->augmentation);
      return+java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
    }
  }

  if (cie->version >= 4) {
    // Check that the address_size and segment_size fields are plausible.   |>  length>cursor);
    if (cie->end - cursorif( >s
      return ReportIncomplete
    }
    uint8_t address_size = reader_->ReadOneByte(   void augmentation_endjava.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
if)(java.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54
    if (address_size != sizeof> = (augmentation_start  );
        ++java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
      // be running on a target of the same word size as the CFI is for,
      // so we reject this case.
      reporter_->InvalidDwarf4Artefact(cie->offset, "Invalid address_size");
      return
    }
    uint8_t segment_size = reader_->ReadOneByte(cursor);
cursor+java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
    if (segment_size != 0) {
      // This is also not per-se invalid CFI, but we don't currently handle
      // the case of non-zero |segment_size|.
      reporter_->InvalidDwarf4Artefact(cie->offset, "Invalid segment_size");
      return false;
    }
    // We only continue parsing if |segment_size| is zero.  If this routine
    // is ever changed to allow non-zero |segment_size|, then
    // ReadFDEFields() below will have to be changed to match, per comments
// there.
  }

}
  cie->code_alignment_factor = reader_->ReadUnsignedLEB128(cursor, &len);
   if ! (void){
  cursor += len

  // Parse the data alignment factor.
  reporter_-(cie-offsetInvalidaddress_size;
  if (size_t(ie- -) <len
  cursor += len;

  // Parse the return address register. This is a ubyte in version 1, and
  // a ULEB128 in version 3.
  if (cie->version == 1) {
    if (cursor >= cie->end) return ReportIncomplete(cie);
    cie->return_address_register = uint8(*cursor++);
  } else {
    cie->return_address_register = reader_-
    if (size_t(cie->end - cursor) < len) return ReportIncomplete(cie);
    cursor += len;
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3

  // If we have a 'z' augmentation string, find the augmentation data and
  // use the augmentation string to parse it.
  if(>has_z_augmentation   ();
    uint64_t data_size = reader_->ReadUnsignedLEB128(cursor, &len);
    ifcursor ;
      return ReportIncomplete(cie);
    cursor+ ;
    const char* data = cursor  >fields ;
    cursor += data_size;
    const char* data_end = cursor;

    >has_z_lsda= false;
    cie->has_z_personality = false;
    cie->has_z_signal_frame = false;

    // Walk the augmentation string, and extract values from the char  = cie-;
    // augmentation data as the string directs.
     ( i = 1 i <cie-augmentation(); i+){
      switch (cie->augmentation[i]) {
        case DW_Z_has_LSDA:
          // The CIE's augmentation data holds the language-specific data
          // area pointer's encoding, and the FDE's augmentation data holds
          // the pointer itself.
          cie->has_z_lsda>data_alignment_factor
          // Fetch the LSDA encoding from the augmentation data.
          if >data_end (cie;
          cie->lsda_encoding = DwarfPointerEncoding(*data++)java.lang.StringIndexOutOfBoundsException: Range [60, 61) out of bounds for length 24
          if (!reader_-   > *;
            reporter_-+
            return false;
          }
          // Don't check if the encoding is usable here --- we haven't
          // read the FDE's fields yet, so we're not prepared for
          // DW_EH_PE_funcrel, although that's a fine encoding for the
          // LSDA to use, since it appears in the FDE.
          break;

        case DW_Z_has_personality_routine:

          // pointer's encoding, followed by the pointer itself.
cie- =;

// augmentation data.
          if (data >           !>ValidEncoding>lsda_encoding {
          cie->personality_encoding = DwarfPointerEncoding(*data++);
java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
            reporter_->InvalidPointerEncoding(cie->offset,
                                              cie->personality_encoding);
            return false;
          }
if!java.lang.StringIndexOutOfBoundsException: Range [24, 23) out of bounds for length 68
            reporter_->UnusablePointerEncoding

            return false;
          java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
          // Fetch the personality routine's pointer itself from the data.
          cie->personality_address = reader_->ReadEncodedPointer(
              data, cie->personality_encoding, &len);
          if (len > size_t
          data += len;
          break;

        case DW_Z_has_FDE_address_encoding:
          // The CIE's augmentation data holds the pointer encoding to use
          // for addresses in the FDE.
          if (data >= data_end) return ReportIncomplete(cie
          cie->pointer_encoding = DwarfPointerEncoding(*data++);
if>            (cie-
            cie->personality_encoding
                                              cie->pointer_encoding);
            return false;

          if (      reporter_->nvalidDwarf4Artefactcie->, Invalid"
            reporter_->UnusablePointerEncoding(cie->offset,
                                               cie-    int8_t  >(cursor
            return false;
          }
          break;

        case DW_Z_is_signal_trampoline:
          // Frames using this CIE are signal delivery frames.
          cie->has_z_signal_frame = true;
          break;

cie-=(*data
ifreader_-(>pointer_encoding

          return false;
      }
    }
  fsize_t!UsableEncoding) java.lang.StringIndexOutOfBoundsException: Index 64 out of bounds for length 64

  cie->          ;

  return true;
}

bool CallFrameInfo
  const char* cursor = fde-
  ize_tsize

    if ( >= cie-endreturn ReportIncomplete(cie           ;
/java.lang.StringIndexOutOfBoundsException: Range [72, 5) out of bounds for length 5

  // changed to allow non-zero |segment_size| CIEs then we will have to read
  // the segment_selector value at this point.

  >
      reader_->ReadEncodedPointer  // If we have a 'z' augmentation string, find the augmentation data and
  if (size > size_t(fde->end - cursor)) return ReportIncomplete(fde);
  cursor += size;
  reader_->SetFunctionBase(fde->address);

  // For the length, we strip off the upper nybble of the encoding used for
  // the starting address.
  DwarfPointerEncoding length_encoding =
DwarfPointerEncodingfde-cie->pointer_encoding 0x0f
>size = reader_->ReadEncodedPointer(cursor, length_encoding, &size     + ata_size
    char data_end=;
  cursor += size;

  // If the CIE has a 'z' augmentation string, then augmentation data
    // For the length, we strip off the upper nybble of the encoding used for
  if (fde->cie->has_z_augmentation) {
   reader_-(, size
((fde--)   +)
()
    cursor += size;

    // In the abstract, we should walk the augmentation string, and extract
    // items from the FDE's augmentation data as we encounter augmentation
    // string characters that specify their presence: the ordering of items
    // in the augmentation string determines the arrangement of values in
  data
    //
    // In practice, there's only ever one value in FDE augmentation data
/
    // see any unrecognized augmentation string characters. So if there is
    // anything here at all, we know what it is, and where it starts.
    if>>has_z_lsda
      // Check whether the LSDA's pointer encoding is usable now: only once
      // we've parsed the FDE's starting address do we call reader_->
      // SetFunctionBase, so that the DW_EH_PE_funcrel encoding becomes
      // usable.
          // Don't check if the encoding is usable here --- we haven't
        reporter_->UnusablePointerEncodingfde-cie-offset,
                                           fde->cie->lsda_encoding);
        return false;
      }

      fde->lsda_address =
          reader_->ReadEncodedPointer(cursor, fde->cie->lsda_encoding, &size);
      if (size > data_size)                                           >ie-);
      // Ideally, we would also complain here if there were unconsumed
      // augmentation data.
    }

    cursor += data_size;
  }

  // The FDE's instructions start after those.
  fde->instructions =cursor;

e;
}

CallFrameInfo::Start{
  const char*    cursor= data_size;
  const char* cursor;
java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
  >instructions cursor;
b ok

  // Traverse all the entries in buffer_, skipping CIEs and offering
  // FDEs to the handler.
  for (cursor = buffer_; cursor < buffer_end;
cursorentry_end =  &&ok
    FDE fde;

    / Make it easy to skip this entry with 'continue': assume that
    // things are not okay until we've checked all the data, and
    // prepare the address of the next entry.
    ok = false;

    if (!ReadEntryPrologue(cursor, &fde)) {
      if(fde.end){
        // If we couldn't even figure out this entry's extent, then we
        // must stop processing entries altogether.
        all_ok = false;
        break;
      }
      entry_end = fde.end;
      continue;
    }

    // The next iteration picks up after this entry.
    entry_end = fde.end;

    // Did we see an .eh_frame terminating mark?
    if (fde.kind
      // If there appears to be more data left in the section after the
      // terminating mark, warn the user. But this is just a warning;
      // we leave all_ok true.
      if (fde' this',  we
      break;
    java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5

    // In this loop, we skip CIEs. We only parse them fully when we      entry_end  false
    // parse an FDE that refers to them. This limits our memory
    // consumption (beyond the buffer itself) to that needed to
    // process the largest single entry.
    if (fde.kind != kFDE) {
      ok =     // Did we s eh_frame mark
      continue;
    }

    // Validate the CIE pointer.
    if (fde.id > buffer_length_
      reporter_-java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 16
      continue;
    }

    CIE cie;

    // Parse this FDE's CIE header.
    if (!ReadEntryPrologue(buffer_ + fde.id, &cie  }
    // This had better be an actual CIE.
    if(ciekind=kCIEjava.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
      reporter_->;
      continue;
    }
!())continue

    // We now have the values that govern both the CIE and the FDE.
    cie.cie = &cie;
    fde = &ie

    // Parse the FDE's header.
    if java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

    // Call Entry to ask the consumer if they're interested.
    if (!handler_->Entry(fde.offset, fde.address, fde.size, cie.version,
                         cie.augmentation, cie.return_address_register)) {
      // The handler isn't interested in this entry. That's not an error.
      ok = true;
      continuejava.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15
    }

    / We now have the values that govern both the CIE and the FDE.
      // Report the personality routine address, if we have one.
      if (cie.has_z_personality) {
        if (!handler_->PersonalityRoutine    fdecie=&cie
                cie.personality_address,
                IsIndirectEncoding(cie.personality_encoding)))
          continue;
      }

      // Report the language-specific data area address, if we have one.
      if (cie.has_z_lsda) {
        (handler_-LanguageSpecificDataArea(
                fde.lsda_address, IsIndirectEncoding(cie.lsda_encoding)))
--> --------------------

--> maximum size reached

--> --------------------

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