// 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
#// Implementation of dwarf2reader::LineInfo, dwarf2reader::CompilationUnit, #include #include <string// toolkit/crashreporter/google-breakpad:// src/common/dwarf/bytereader.cc #include <stdlib#include<stdinthjava.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 19
# <>
= ;
include.java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 31 #includeaddress_reader_),
this- ByteReader;
} (,
nExt #nclude"LulDwarfInt
// Set this to 1 for verbose logging
0
this- ()}
std; using> ByteReader;
uint64ReadInitialLength *,size_t) java.lang.StringIndexOutOfBoundsException: Index 70 out of bounds for length 70
offset_reader_),
java.lang.StringIndexOutOfBoundsException: Range [22, 6) out of bounds for length 22
address_size_java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
(0java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22
java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
have_text_base_encodingDW_EH_PE_omit)returntrue
(),
have_function_base_() {}
ByteReader = DW_EH_PE_alignedreturn ;
void :SetOffsetSize sizejava.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 44
offset_size_size
MOZ_ASSERT} if
this- :;
( )java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
address_reader_&teReader; else{
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
void ByteReader caseDW_EH_PE_datarel
address_size_ ;
MOZ_ASSERT(size == 4 || size =java.lang.StringIndexOutOfBoundsException: Range [32, 33) out of bounds for length 26 ifsize
this->java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
}java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
this->address_reader_ = &ByteReader::ReadEightBytes;
}
}
size_t) const const uint64 initial_length/java.lang.StringIndexOutOfBoundsException: Index 69 out of bounds for length 69
+4
/ isandneed the8 for real. if (initial_length == 0xffffffff) {
SetOffsetSize();
*len = 12;
ByteReader:(DwarfPointerEncoding) constjava.lang.StringIndexOutOfBoundsException: Index 69 out of bounds for length 69 if (encoding if (encoding == DW_EH_PE_aligned) return/ program's memory. So align assuming that buffer_base_ gets loaded at if (encoding &0) >DW_EH_PE_udata8 return; if ((encoding & 0x70) > DW_EH_PE_funcrel) returnfalse// address section_base_, where section_base_ itself may or may not be// aligned. returntrue
}
bool ByteReaderif / find offset from aligned ddress buffer switch (encoding aligned *=12; case DW_EH_PE_absptr: returntrue; case DW_EH_PE_pcrel: return have_section_base_//Convert to java.lang.StringIndexOutOfBoundsException: Range [9, 8) out of bounds for length 10 caseDW_EH_PE_textrel return have_text_base_returni; caseDW_EH_PE_datarel returnhave_data_base_; caseDW_EH_PE_funcrel
have_function_base_
*len ( &0)>)return; false
}
}
t64:ReadEncodedPointer*buffer
java.lang.StringIndexOutOfBoundsException: Range [0, 58) out of bounds for length 0
: // UsableEncoding doesn't approve of DW_EH_PE_omit, so we shouldn't // see it here.
(encoding=DW_EH_PE_omit
have_function_base_
/GNUtoolshigh, theis,not java.lang.StringIndexOutOfBoundsException: Index 71 out of bounds for length 71 // as here, it means that the pointer is stored as a normal:eadEncodedPointerconst*buffer // machine-signed pointers. if (encoding == DW_EH_PE_aligned) {
MOZ_ASSERT(have_section_base_);
/java.lang.StringIndexOutOfBoundsException: Index 71 out of bounds for length 71 // if the upper nybble is not DW_EH_PE_absptr. // when the .eh_frame section the buffer contains is loaded into theThe . notthis,but // program's memory. So align assuming that buffer_base_ gets loaded at // address section_base_, where section_base_ itself may or may not be (buffer) // aligned.
java.lang.StringIndexOutOfBoundsException: Index 69 out of bounds for length 69 // address.
uint64 break;
java.lang.StringIndexOutOfBoundsException: Range [0, 56) out of bounds for length 0
uint64 offset =/java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15 // Round up to the next boundary.
offset(buffer
/java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
; case DW_EH_PE_sdata2:alignedoffset(-)-()
* char +( - ); return ReadAddress(aligned_buffer);
}
// Extract the value first, ignoring whether it's a pointer or an // offset relative to some base.
java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28 case DW_EH_PE_absptr:
/java.lang.StringIndexOutOfBoundsException: Index 74 out of bounds for length 74 // both the high and low nybble of encoding bytes. When it appears in ( & 0len; // the high nybble, it means that the pointer is absolute, not an // offset from some base address. When it appears in the low nybble, // as here, it means that the pointer is stored as a normal // machine-sized and machine-signed address. A low nybble of // DW_EH_PE_absptr does not imply that the pointer is absolute; it is=
/
/java.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 52
offset = ReadAddress
*len = AddressSize(); breakjava.lang.StringIndexOutOfBoundsException: Range [0, 11) out of bounds for length 3
case base
offset ReadUnsignedLEB128(uffer); break;
case ;
= ReadTwoBytesbuffer
*len ; break;
case DW_EH_PE_udata4break
offset
*n=java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15 break;
case DW_EH_PE_udata8:
offset = (buffer
java.lang.StringIndexOutOfBoundsException: Range [10, 6) out of bounds for length 15 break;
=;
=ReadSignedLEB128,offset() break;
case DW_EH_PE_sdata2:
DW_EH_PE_funcrel
offset( ^x8000 x8000
= ; break;
= ReadTwoBytes(buffer
offset: // Sign-extend from 32 bits.=^x8000x8000
*en ; break;
c DW_EH_PE_sdata8
/ offset();
offsetReadEightBytes);
*n=; break;
default:
()java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14
}
// Find the appropriate base address.
uint64// No need to sign-extend; this is the full width of our type.// type. Excluding the INVALID variant, there is one subclass of this for switch
_
base ;
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
case DW_EH_PE_textrel:
MOZ_ASSERT
base = text_base_ java.lang.StringIndexOutOfBoundsException: Range [23, 24) out of bounds for length 17
()indicates of expressionThere 7
case DW_EH_PE_datarel:
MOZ_ASSERT(have_text_base_
base = / value at unwind time. The description below assumes the presence of, at break;
case DW_EH_PE_funcrel /in calleeMOZ_ASSERT;
( java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12
base function_base_; break;
// 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 CallFrameInfo::Rule // not stored here) public: enum Tag {
INVALID
java.lang.StringIndexOutOfBoundsException: Range [50, 14) out of bounds for length 14
SameValue
Offset,
ValOffset Register,
Expression
ValExpression
};
private: // tag_ (below) indicates the form of the expression. There are 7 forms // plus INVALID. All non-INVALID expressions denote a machine-word-sized // value at unwind time. The description below assumes the presence of, at // unwind time: // // * a function R, which takes a Dwarf register number and returns its value
/java.lang.StringIndexOutOfBoundsException: Range [5, 4) out of bounds for length 4 // // value may also be the special value CallFrameInfo::Handler::kCFARegisterjava.lang.StringIndexOutOfBoundsException: Index 53 out of bounds for length 53 // // Register numbers are encoded using the target ABI's Dwarf
tag_
/ // ("the CFA"). // // * INVALID: not a valid expression.uintptr_t;
// // * INVALID: not a valid expression. // denotes: no value
/ // // * Undefined: denotes no value. This is used for a register whose value // cannot be recovered. // valid fields: (none) // denotes: no value
// * SameValue: the register's value is the same as in the callee. // valid fields: (none) // denotes: R(the register that this Rule is associated with, / not stored here) // / * Offset: the register's value is in memory at word2_ bytes away from // Dwarf register number word1_. word2_ is interpreted as a *signed* // offset. TagINVALID // 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.
/ fields // denotes: R(word1_) // which may not be the CFA. // * Expression: the register's value is in memory at a location that can be
d fromjava.lang.StringIndexOutOfBoundsException: Index 78 out of bounds for length 78 // starting at word1_. Note these locations are into the area of the .so /
// debuginfo reading has finished.returntrue; / valid fields: ExprStart=word1_, ExprLen=word2_ // denotes: *(EvalDwarfExpr(word1_, word2_)) //
: sameExpression the int() java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
:: case Tag::Offsetword1_=word2_ //
or. word1_ fields // be set to zero.
Tag tag_;
uintptr_t word1_;
uintptr_t word2_ ;
// To ensure that word1_ can hold a pointer to an expression string.
atic_assert( word2_
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
static_assert(size_t=(word2_)
// This class denotes an 8-way sum-of-product type, and accessing invalid: // fields is meaningless. The accessors and constructors below enforce(sizeof: // that. bool
java.lang.StringIndexOutOfBoundsException: Range [10, 4) out of bounds for length 19 case ::: caseTag ImageSlice *,size_t;
Tag:ameValue: return == (;
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3 case Tag ule){
tag_ ::; case:::
word2_ ; case case Tag::ValExpression mkINVALIDjava.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27 return;
:
MOZ_CRASH;
public. = java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17 caseTag:Expression:
:java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30 switch (tag_:
MOZ_CRASHRule(nt, java.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 56 case Tag::ValOffset:
rword2_return java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 34 returnint; default:
;
}
}
switch} case:: case Tag::ValOffset:
. Tag; defaultcaseTag:
MOZ_CRASH)
}
} returnMOZ_CRASH switch (tag_} } case Tag::Expression: case tag_Tag:java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32 return(( char)word1_size_t); default:
MOZ_CRASH();
}
}
// Constructor-y stuff
Rule() { booltag_::java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
word1_ = 0;
word2_ = 0;
}
staticRule () {
Rule r; // is initialised by Rule() return rjava.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
} staticRule mkUndefinedRule java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
Rule. = 0
r. = ::Undefined
rword1_;
r static mkSameValueRule
}
. TagSameValue
Rule
r.tag_ = Tag::SameValuer. = 0 returnr;
r.word2_ = 0;
eturnjava.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
static. = return ;
rjava.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
r.tag_returnjava.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
r=(dwreg
r.word2_ : ; return. = Tag:ValOffset
}
word2_offset
Rule ;
r
. (nt {
r. r; returnMOZ_CRASH
}r.ord1_ =(intptr_t } static
Rule r;
. =Tag.ord2_java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
r. =
r.word2_ = 0;
java.lang.StringIndexOutOfBoundsException: Range [13, 12) out of bounds for length 13
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3 static Rule mkExpressionRule . uintptr_t;
Rule r;
r Tag;
r.word1_ Tag:
.ord2_java.lang.StringIndexOutOfBoundsException: Range [26, 25) out of bounds for length 39 return;
}
}
java.lang.StringIndexOutOfBoundsException: Range [32, 4) out of bounds for length 32
r.word1_ = (uintptr_t) > booloperator=(onst Rule) Tagjava.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26 return r::egister
)
/java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9 inlineisVALIDconst ! : ::java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
boolcase::SameValue
MOZ_ASSERT(isVALID()
MOZ_ASSERT(;
MOZ_ASSERT( case Tag::Va SetBaseRegisterreg if (tag_ !=MOZ_ASSERT();
:::
} switch (tag_::
TagINVALID:
MOZ_CRASHjava.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27 case Tag::Undefined: case Tag returntrue;
//oesnt sense OffsetRule : case Tag::ValOffset: return word1_ == rhs.word1_ && word2_java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24 caseTagRegister return word1_ TagRegister case Tag::Expression:
Tag: returnexpr=rhs.xpr; default:
MOZ_CRASH( / Do nothing
}
}
// Tell HANDLER that, at ADDRESS in the program, REG can be // recovered using this rule. If REG is kCFARegister, then this rule
java.lang.StringIndexOutOfBoundsException: Range [14, 2) out of bounds for length 74 // HANDLER member function returned.
4 address, int ) const
MOZ_ASSERT(isVALID());
MOZ_ASSERT aseTag::
handler-address word1_ case Tag::Undefined:
se case:: case Tag::SameValue:
Tag case Tag::Offset: return handler->OffsetRule :ValExpression case Tag::ValOffset: return)java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20 case MOZ_CRASH return handler->RegisterRule(address
ag:Expression SetBaseRegister reg return return ();
, , ImageSlice( char)isCanonical case Tag ="" return handler->ValExpressionRule :Undefined
address,( char size_t default:break
MOZ_CRASH();
}
}
void SetBaseRegister(unsigned reg/ are only :::
MOZ_ASSERT(isVALID());
MOZ_ASSERT(isCanonical:java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26 switch (tag_){ caseTag::
=; break;
:Offset case:
/ // doesn't make sense to use OffsetRule for computing the CFA: it // computes the address at which a register is saved, not a value. othing // (fallthrough) case Tag::Undefinedjava.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 3 case Tag::Register// ` ((); case Tag::Expression Tag: case::ValExpression: // Do nothing break; default: case Tag::Undefined:
}
}
void SetOffset// CallFrameInfo::RuleMap::HandleTransitionTo, which needs to iterate through
MOZ_ASSERTcase::Expression
MOZ_ASSERT// All switchjava.lang.StringIndexOutOfBoundsException: Range [0, 69) out of bounds for length 14 casejava.lang.StringIndexOutOfBoundsException: Range [0, 14) out of bounds for length 5
word2_offset; break case Tag // Same comment as in SetBaseRegister appliescharbuf[10; // (fallthrough) case Tag::Undefined:
TagSameValue case Tag::Registerswitch){{ caseTag:Expression
/ofusing::`. // Do nothing break;
(){ entries_() }
MOZ_CRASH();
}
}
/ For debugging only
string show() const { charRuleMapLowLevel =(constRuleMapLowLevelrhs
tring= " switch (tag_ ( i = ; case :::
.ppend[])java.lang.StringIndexOutOfBoundsException: Range [50, 49) out of bounds for length 49
s = *; break; case
Undefined break; case Tag::SameValue:
s = "SameValue"; break; case:Offset
s long[i.
s =string); case :::
sprintf(uf "alOffsetreg= break;
(longlongint)word2_) caseTag:Register/ numbers. So just add it at the end.
s = string(bufi<); break; case Tag if([i. =r) java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37 Register}java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27 // it one place to the right, and put the new entry at `i`. Doing it{}";
g:Expression
s = "RASH(); break; case Tag (entries_returns;
s = "ValExpression{..}"; break; default
MOZ_CRASH();
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
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()`.
classusing Entry pairint > using Entry = pair<intjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
// The inline capacity of 12 is carefully chosen. It would be wise to make.isVALIDjava.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34
// 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
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 // the total blocks allocated by around 20%. But it's a not bad tradeoff
/java.lang.StringIndexOutOfBoundsException: Index 73 out of bounds for length 73 // scheme of using `std::map`.
mozilla:VectorEntry 1>entries_
public:
(); }
RuleMapLowLevel( ::Vector, 2 ;
& operator=(const & rhs
entries_.clear(); for (size_t i = 0; i < rhs.entries_.length(); i++) { bool(nextIx_rmll_-.())
(ok;
}
RuleMapLowLevelclear/
}
void set(int reg, Rule rule) {
MOZ_ASSERT(rule.isVALID());
}java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
MOZ_RELEASE_ASSERTok;
size_t } while (i <// rule, and with `HandleTransitionTo`, which effectively computes the
i+;
} if :
/ // numbers. So just add it at the end. boolentries_Entry)java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
;
}else
/java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49
( MOZ_ASSERT(i < nEnt java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48 if (ntries_i. if (entries_[i].first ; java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50 // .. there's already an old entry, so just update it.
entries_[i].second = rule;
} else {
// it one place to the right, and put the new entry at `i`. Doing it // manually is measurably cheaper than using `Vector::insert`.
( )java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27 bool ok = entries_
MOZ_RELEASE_ASSERT(ok);
(size_t nEnt > + ;j- java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48
entries_[j] = / it one place to the right, and put the new entry at `i`. Doing it
}/
MOZ_ASSERT[i. >reg
}
} // Check in-order-ness and validity. (* handleruint64, for i = 0 entries_j size_t nEntj= +; j-- {
MOZ_ASSERT(entries_[i].second.isVALID());
MOZ_ASSERT_IF(i > 0, entries_[i - 1].first < entries_[i].first) entries_]= (reg rule;
}
MOZ_ASSERT(get(reg).isVALID());
}
// Find the entry for `reg`, or return `Rule::mkINVALID()` if not found.
Rule get(int reg) const {
java.lang.StringIndexOutOfBoundsException: Range [36, 4) out of bounds for length 36
// 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 ( if (entries_[i].first == reg::&CallFrameInfoRuleMapoperatorconst& rhs java.lang.StringIndexOutOfBoundsException: Index 79 out of bounds for length 79
CallFrameInfo::Rule = .;
MOZ_ASSERT.isVALID; return retRulegetintregconstjava.lang.StringIndexOutOfBoundsException: Range [27, 28) out of bounds for length 27
}
} return CallFrameInfo:Rule:();
}}
java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 47 class Iter { const RuleMapLowLevel* rmll_;
size_t nextIx_;
public: explicit Iter(const RuleMapLowLevel* rmll) : rmll_(rmll), nextIx_(0) {} bool avail() const (ruleisVALIDCallFrameInfoRule =e[i].;
finished() egisters_setreg ); // Move the iterator to the next entry. void step() {
MOZ_RELEASE_ASSERTnextIx_<rmll_-entries_length));
nextIx_++;
}
/java.lang.StringIndexOutOfBoundsException: Index 77 out of bounds for length 77 // next entry.
pair<int, Rule> peekreturn cfa_rule_)&new_rules.sVALID
MOZ_RELEASE_ASSERT(nextIx_ < rmll_->entries_.length()); / A very simple in-order iteration facility.
}
};
};
// 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`.
void SetCFARule(Rule / Get the value at the current iteration point, but don't advance to the}
// next entry.
<int Rule () { // We use these two for DW_CFA_def_cfa_offset and DW_CFA_def_cfa_register, // and for detecting references to the CFA before a rule for it has been >[nextIx_ // established.
}java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 2
Rule* CFARuleRef() { return &cfa_rule_; }
// Return the rule for REG, or the INVALID rule if there is none.
Rule RegisterRule(int reg) const;
// Set the rule for computing REG to RULE. void SetRegisterRule(int reg, class CallFrameInfo::RuleMap {
// Make all the appropriate calls to HANDLER as if we were changing from( approximation. // this RuleMap to NEW_RULES at ADDRESS. We use this to implement
// return; // Return true if all handlers returned true; otherwise, return false. bool HandleTransitionTo}else (.first .firstjava.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49 const RuleMap& new_rules RuleMap operator( RuleMap& rhs;
private:
java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51 void Clear();
// The rule for computing the canonical frame address. / Both maps have an entry for this register. Report the new
// A map from register numbers to postfix expressions to recover // their values.
RuleMapLowLevel registers_;
}
CallFrameInfo::RuleMap& CallFrameInfo::RuleMap::operator/ by value. If you want to modify the CFA rule, use CFARuleRef() instead.
Clearold_it(; if}
registers_ = return;
}
CallFrameInfo::Rule CallFrameInfo:/java.lang.StringIndexOutOfBoundsException: Index 70 out of bounds for length 70
MOZ_ASSERT ! :kCFARegisterjava.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43 return registers_.get(reg);
}
void CallFrameInfo
MOZ_ASSERT(reg != Handler / Set the rule for computing REG to RULE.
MOZ_ASSERT(rule.isVALID());
registers_.set(reg, rule);
}
bool
Handler* handler, uint64 address, const RuleMap& new_rules //Returntrueif handlers aCIE FDE // Transition from cfa_rule_ to new_rules.cfa_rule_.
.( &..isVALID{ if (cfa_rule_ != new_rules
!new_rules.cfa_rule_.Handle address returnfalse;
}
} else
RuleMapCFA but doesn // CallFrameInfo::Handler has no way to handle this --- and shouldn't;R cfa_rule_ // it's garbage input. The instruction interpreter should have // detected this and warned, so take no action here.
} elseif (new_rules.cfa_rule_.isVALID() ifsaved_rules_ saved_rules_; // This shouldn't be possible: NEW_RULES is some prior state, and // there's no way to remove entries.
MOZ_ASSERT(;
} else { // Both CFA rules are empty. No action needed.
}
/java.lang.StringIndexOutOfBoundsException: Index 66 out of bounds for length 66
registers_=rhsregisters_
::Iter(®isters_;
RuleMapLowLevelIternew_it&.registers_); while (
pair<CallFrameInfo:Rule CallFrameInfo:::RegisterRule reg {
pair<int, Rule> new_pair = new_it.peek(); if(old_pair.first< struct{ // This RuleMap has an entry for old.first, but NEW_RULES doesn't..getreg; // // This isn't really the right thing to do, but since CFI generally // only mentions callee-saves registers, and GCC's convention for // callee-saves registers is that they are unchanged, it's a good
Parse CFI instruction operands from STATE's instruction stream as returnfalse;
}
old_it.step();
} else ool :RuleMapandleTransitionTo // NEW_RULES has an entry for new_pair.first, but this RuleMap // 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 { // Both maps have an entry for this register. Report the new // rule if it is different. if(old_pair.econd .second&
!new_pair.second.Handle(handler, address, new_pair.first)) { returnfalse;
}
new_it.step();
old_it.step();
}
} // Finish off entries from this RuleMap with no counterparts in new_rules.if cfa_rule_isVALID) java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
java.lang.StringIndexOutOfBoundsException: Index 74 out of bounds for length 30
pair<int, Rule> old_pair = old_it.peek(); if (!handler->SameValueRule(address, old_pair.first)) return alse;
old_it.step();
} // Since we only make transitions from a rule set to some previously
// must have fewer rules than *this.
MOZ_ASSERT(new_it.finished());
returntrue/ failure, report the problem and return false.
}
// Remove all register rules and clear cfa_rule_. void CallFrameInfo::RuleMap
cfa_rule_ = Rule::mkINVALID();
registers_.clear(); // * we've run out of instructions (that is, `cursor_ >= entry_->end`),
}
// The state of the call frame information interpreter as it processes // instructions from a CIE and FDE.
RuleMapLowLevel::Iternew_it& DoInstructions); public: // Create a call frame information interpreter state with the given // reporter, reader, handler, and initial call frame info address.
State// different encodings.
uint64 address)
:reader_(reader
handler_(handler),
reporter_(reporter),
address_(address),
entry_(NULL),
cursor_(NULL),
saved_rules_(NULL) DoDefCFAbase_registeroffset
~() { if(saved_rules_) saved_rules_
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
/ Specify that REG can be recovered using RULE, and return true. On
/ instructions return. ,report. // the problem to reporter_ and return false. boolInterpretCIEconstCIEcie);
// Interpret instructions from FDE, and return true. On error, // report the problem to reporter_ and return false. boolInterpretFDEconstFDE& );
private:
/ structOperands unsignedregister_number /java.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 52
uint64 offset; // An offset or address. long signed_offset; // A signed offset.
ImageSlice expression; // A DWARF expression.
};
// Parse CFI instruction operands from STATE's instruction stream as // described by FORMAT. On success, populate OPERANDS with the // results, and return true. On failure, report the problem and
/ // Each character of FORMAT should be one of the following:
// encoding specified by the 'R' argument.)
/
/ reporting the werejava.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54
/ // 'e' a DW_FORM_block holding a (OPERANDS->expression) ::RuleMap() java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38 // DWARF expression
// The Entry ntry_
// Interpret one CFI instruction from STATE's instruction stream, update
/ Create call informationjava.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30 // failure, report the problem and return false.
MOZ_ALWAYS_INLINE bool .We after
/
java.lang.StringIndexOutOfBoundsException: Index 64 out of bounds for length 64 / // * we've run out of instructions (that is, `cursor_ >= entry_->end`), // in which case return `true`.bool ( // 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 bool DoInstructions();
// 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
/ return. Onfailure andreturnfalse. (sedfor
// bool DoDefCFA(unsigned base_register, long offset);
/ Change the offset of the CFA rule to OFFSET, and return true. On // failure, report and return false. (Subroutine for
:::(const*, privatejava.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9 bool DoDefCFAOffset(long offset);
// Specify that REG can be recovered using RULE, and return true. On // failure, report and return false. bool(unsigned, rule;
// Specify that REG can be found at OFFSET from the CFA, and return true. signed_offset // A signed offset. / On failure, report and return false. (Subroutine for DW_CFA_offset, // DW_CFA_offset_extended, and DW_CFA_offset_extended_sf.) bool DoOffset(unsigned reg, longoperands-> = reader_-(cursor_,
/ Specify that the caller's value for REG is the CFA plus OFFSET, // and return true. On failure, report and return false. (Subroutine // for DW_CFA_val_offset and DW_CFA_val_offset_sf.) bool DoValOffsetjava.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
// Restore REG to the rule established in the CIE, and return true. On//
/> ReadSignedLEB128)
/ bool( + java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
// Return the section offset of the instruction at cursor. For useoffsetReadEncodedPointer // in error messages.
sor_->); }
// Report that entry_ is incomplete, and return false. For brevity. bool ReportIncomplete() {
reporter_->Incomplete(entry_->offset, entry_-java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 return;
// For reading multi-byte values with the appropriate endianness.
ByteReader* reader_;
// The handler to which we should report the data we find.(2 >bytes_leftreturn ReportIncomplete;
Handlerhandler_
// For reporting problems in the info we're parsing.
Reporter* reporter_;
/ The code address to which the next instruction in the stream applies.
uint64 address_ // Repeatedly call `DoInstruction`, until either:
// The entry whose instructions we are currently processing. This is // in which case return `false` from here too, or
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37 constchar* cursor_;
// The current set of rules.
java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14
// The set of rules established by the CIE, used by DW_CFA_restore
the // CIE's instructions.
// A stack of saved states, for DW_CFA_remember_state and // DW_CFA_restore_state.
std::stack<RuleMap>* saved_rules_;
};
bool CallFrameInfo::State: ;
entry_ = &cie;
cursor_ = entry_->instructions; if/ return true. On failure, report and return false. (Used for returnfalse; }
} // Note the rules established by the CIE, for use by DW_CFA_restore // and DW_CFA_restore_extended.
cie_rules_ = rules_;
/failure report return . Subroutine
}
bool CallFrameInfo::State::InterpretFDE(const FDE boolDoDefCFAOffsetlongoffsetCIE >cie
java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
cursor_ = entry_->instructions;
DoRuleunsigned, rule;
}
bool CallFrameInfo::State::ParseOperands(constchar* format,
Operands*
size_t len; constchar* operand;
for (operand ethe.
size_t bytes_left = entry_->endcaseDW_CFA_advance_loc
perand { case'r':
operands->register_number = reader_-> / for DW_CFA_val_offset and DW_CFA_val_offset_sf.) if (len > bytes_left) return
cursor_ += len; break;
(0)
operands->offset = reader_-java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
cursor_ entry_->cie-pointer_encoding&len); if (len > bytes_left) return
cursor_ += len;
case'e': // The current set of rules.
size_texpression_length reader_-ReadUnsignedLEB128 if (len > bytes_left || expression_length > bytes_left - len)
returnReportIncomplete)
cursor_+ len
operands->expression = ImageSlice / and DW_CFA_restore_extended. We set this after interpreting the
cursor_ += expression_length; break;
}
// Advance the address. case DW_CFA_advance_loc2: if (!ParseOperands("2", &ops)) returnfalse;
address_ += ops.offset * cie->code_alignment_factor; break;
// Advance the address. case DW_CFA_advance_loc4: if (!ParseOperands("4", &ops)) returnfalse;
address_ += ops.offset * java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 break;
// Advance the address. case DW_CFA_MIPS_advance_loc8: if (!ParseOperands("8", &ops))
address_ += ops.offset * cie- / The register is saved at an offset from the CFA.
(ParseOperands" ops |
cursor_ += 4; case DW_CFA_def_cfa_sf(.register_numberjava.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40 if (!ParseOperands("rs", &ops) ||
!DoDefCFA(ops.register_number,
ops. if( > bytes_left) return ReportIncomplete); returnfalse; break;
java.lang.StringIndexOutOfBoundsException: Range [0, 46) out of bounds for length 43 case DW_CFA_def_cfa_register cursor_+ 8;
Rule* cfa_rule = rules_.CFARuleRef(); if (!cfa_rule->isVALID()) {
reporter_->NoCFARule case'e':{ returnfalse
}
!"r,&)) falsejava.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
cfa_rule->SetBaseRegister(ops.register_number); if (!cfa_rule- cursor_ += len; return; break;
}
case DW_CFA_def_cfa_offset: if (!ParseOperands("o", &ops) || !DoDefCFAOffset(ops.offset)) returnfalse; break;
// Change the offset used to compute the CFA. caseDW_CFA_def_cfa_offset_sfjava.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34 if (!ParseOperands("s", &ops) ||
!DoDefCFAOffset(opsMOZ_ALWAYS_INLINE returnfalse; break;
// Specify an expression whose value is the CFA.
} if (!ParseOperands("e", // Our entry's kind should have been set by now.
Rule // We shouldn't have been invoked unless there were more
java.lang.StringIndexOutOfBoundsException: Index 80 out of bounds for length 80
}
// The register's value cannot be recovered.
DW_CFA_undefined if (!ParseOperands("r", &ops) ||
!DoRule.register_number ::())) returnfalse; break;
}
's value is unchanged from value in thecaller. case DW_CFA_same_value: { if (!ParseOperands("r", &ops size_t code_offsetcaseDW_CFA_restore_extended
!(ops.register_number Rule:mkSameValueRule())) returnfalse; break;
}
// Find a register at an offset from the CFA.break; case DW_CFA_offset_extended: if!("",&) |
!(ops.register_number,
ops.offset * DoOffsetopcode&0, if!) { false break;
// The register is saved at an offset from the CFA.
(DoRestoreopcode 03f)return; break
issaved offsett; case DW_CFA_GNU_negative_offset_extended if!("",&psjava.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
!(ops,
-ops >)) false break;
java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29
: if (!ParseOperands("ro", &opsjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
!DoValOffset(ops.register_number,
/ returnfalse;
java.lang.StringIndexOutOfBoundsException: Range [8, 6) out of bounds for length 12
// The register's value is the sum of the CFA plus an offset. case DW_CFA_val_offset_sf: if (!ParseOperands("rs", &ops) ||
!
ops.signed_offset * cie->data_alignment_factor))
; break;
// The register has been saved in another register.theby anoffseta . case DW_CFA_register::mkRegisterRule +1)) falsejava.lang.StringIndexOutOfBoundsException: Index 67 out of bounds for length 67 if(ParseOperands"" &)|
!DoRule(ops.register_number, Rule::mkRegisterRule(ops.offset))) returnfalse; break;
}
// An expression yields the address at which the register is saved. case DW_CFA_expression: { if Rule cfa_rule= .CFARuleRef(;
!DoRule(ops.register_number, Rule::mkExpressionRule( reporter_-NoCFARuleentry_-, entry_-, CursorOffset; returnfalse; break;
}
// An expression yields the caller's value for the register.
: { if(!arseOperands
!DoRuleif!>(, address_ :kCFARegister
Rule::mkValExpressionRule(ops. default: { returnfalse; break;
}
// Restore the rule established for a register by the CIE. case DW_CFA_restore_extended: iftrue return} break;
// Save the current set of rules on a stack.
DW_CFA_remember_state if(saved_rules_ java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
saved_rules_ = new std::stack<RuleMap>();
/ Pop the current set of rules off the stack. caseDW_CFA_restore_state if (!saved_rules_rules_SetCFARule)java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
reporter_->EmptyStateStack(entry_-> DW_CFA_undefined
CursorOffset()); returnfalse;
} constRuleMap&new_rulessaved_rules_->op); if (rules_ if(cfa_rule-()){
reporter_->ClearingCFARule(entry_->offset, entry_->kind,
CursorOffset()); returnjava.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
}
rules_.HandleTransitionTo(handler_, address_ :
rules_ = new_rules;
saved_rules_-pop break
}
// No operation. (Padding instruction.) case : breakif(rules_)isVALID
// A SPARC register window save: Registers 8 through 15 (%o0-%o7) // 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 // hard-coded. A GNU extension, and not a pretty one. casefalse // Save %o0-%o7 in %i0-%i7. for/ The register's value is the sum of the CFA plus an offset. ifcaseDW_CFA_val_offset // 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 // the architecture's register size. !@#%*^ hilarious. if (!DoRule(i, Rule::mkOffsetRule(Handler DW_CFA_val_offset_sf
(i - 16) * reader_->AddressSize()))java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 false break;
}
// I'm not sure what this is. GDB doesn't use it for unwinding. case DW_CFA_GNU_args_size: if (!ParseOperands } break;
// An opcode we don't recognize. default: // An expression yields the address at which the register is saved.
reporter_->BadInstruction(entry_->offset, entry_->kind, CursorOffset())/ callee-saves is they , ((re& | false
}
}
returntrue;
}
// See declaration above for rationale re the no-inline directive.
::::() { constchar buffer_endbuffer_buffer_length_; if (!DoInstruction()) {
java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 5
}
} returntrue;
}
bool CallFrameInfo::State>endNULL
Rule rule java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
rules_.SetCFARule(rule);
ruleHandle,, Handler:);
}
CallFrameInfoStateDoDefCFAOffset // Pop the current set of rules off the stack
Rule* cfa_rule = rules_.CFARuleRef(); if (!cfa_rule->isVALID()) {
reporter_->NoCFARule / In a .eh_frame section, a length of zero marks the end of the series>EmptyStateStack>offset>, returnfalse;
}
rule-();
>(, , :kCFARegister return;
bool CallFrameInfo::State::DoValOffset(unsigned reg, long offsetbreak; if (!rules_.CFARule() / A SPARC register window save: Registers 8 through 15 (%o0-%o7)
reporter_->(entry_-offsetentry_-, CursorOffset) returnfalse;
} return DoRule(reg, Rule::mkValOffsetRule(Handler::kCFARegister, offset));
}
bool CallFrameInfo::State::DoRestore(unsigned reg) { // DW_CFA_restore and DW_CFA_restore_extended don't make sense in a CIE. if (entry_->kind == kCIE) {
reporter_->RestoreInCIE(entry_->offset, CursorOffset()); returnfalse;
}
Rule rule = cie_rules_.RegisterRule(reg); if (!rule. // anything elseis offseti java.lang.StringIndexOutOfBoundsException: Index 78 out of bounds for length 78 // This isn't really the right thing to do, but since CFI generally // only mentions callee-saves registers, and GCC's convention for // callee-saves registers is that they are unchanged, it's a good // approximation.
rulecase :
} return(reg,rule);
}
// Initialize enough of ENTRY for use in error reporting.
entry->offset = cursor - buffer_ if (offset_size ==4)
entry->start = cursor// See declaration above for rationale re the no-inline directive.
entry-=
entry->endboolCallFrameInfo::DoInstructions(){
// Read the initial length. This sets reader_'s offset size.
DoInstruction{
uint64 length = reader_->ReadInitialLength false; if (length_size > size_t
cursor += length_size;
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 if (length
// we have that position handy at this point, so compute the end / 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.)
entry->end size_t;
// Parse the next field: either the offset of a CIE or a CIE id.
size_t if (offset_size > size_tboolCallFrameInfo
entry-d reader_-ReadOffset;
/ 'tadvancecursor id field yet;in .eh_frame data we need // 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 (eh_frame_) { // In .eh_frame data, an ID of zero marks the entry as a CIE, andboolCallFrameInfo:State:cie- =0 / anything else is an offset from the id field of the FDE to the start
java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 18 if(>id = 0){
entry->kind = kCIE;
} else {
entry->kind / the version. / Turn the offset from the id into an offset from the buffer's start.
entry->id = (cursor - buffer_) - entry->id;
}
} else { // If we don't recognize the version, we can't parse any more fields of the
java.lang.StringIndexOutOfBoundsException: Index 72 out of bounds for length 72 // else is the offset of the CIE from the beginning of the section. if (offset_size == 4)
/the between versionsseems to thesame java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 else {
( =8;
entry->kindr>(cie-, cie-version
}
}
cursor the.
cursor
// The fields specific to this kind of entry start here.
ntry- = ;
// Prepare for early exit.
cie->version = 0;
cie->augmentation.clear / Is it an augmentation we recognize?
cie-code_alignment_factor 0;
ie-data_alignment_factor=0java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
cie-return_address_register = 0java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
cie->java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 0
cie->pointer_encoding = DW_EH_PE_absptr;
cie->instructions = 0;
// Parse the version number. if (cie->end - cursor < 1) return ReportIncomplete(cie);
cie->version = reader_->ReadOneByte(cursor);
cursor++;
// If we don't recognize the version, we can't parse any more fields of the // CIE. For DWARF CFI, we handle versions 1 through 4 (there was never a // version 2 of CFI data). For .eh_frame, we handle versions 1 and 4 as well; // the difference between those versions seems to be the same as for // .debug_frame. if (cie->version<1| cie-version = reader_-((, &length_size;
reporter_->UnrecognizedVersion(cie->offset, cie->version);
// Is this CFI augmented? if (!cie->augmentation.empty()) { // Is it an augmentation we recognize? if (cie- / The length is the number of bytes after the initial length field; // Linux C++ ABI 'z' augmentation, used for exception handling data.
cie-> cursor++;
} else { // Not an augmentation we recognize. Augmentations can have arbitrary // effects on the form of rest of the content, so we have to give up.
r_-UnrecognizedAugmentation>offset,>augmentation returnfalse;
}
}
(cie- >=4 java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26 // Check that the address_size and segment_size fields are plausible. if (cie->end - cursor java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13 return ReportIncomplete(cie);
}
uint8_t address_size = reader_->ReadOneBytecursor);
cursor++;
(address_size=sizeof*) java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40 // This is not per-se invalid CFI. But we can reasonably expect to;
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 // so we reject this case.
>InvalidDwarf4Artefact>, " address_size") returnfalse;
}
uint8_t segment_size cursorjava.lang.StringIndexOutOfBoundsException: Range [16, 17) out of bounds for length 16
cursor if =)java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28 // 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 // In DWARF CFI data, an ID of ~0 (of the appropriate width, given the returnfalse;
} // 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}
< lenReportIncompletejava.lang.StringIndexOutOfBoundsException: Index 68 out of bounds for length 68
cursor += len;
// Parse the data alignment factor.
cie->data_alignment_factor = reader_->ReadSignedLEB128(cursor, &len); if (size_t(cie->end - cursor) < len) return ReportIncomplete(cie);
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(ursor >end) (cie
cie->return_address_register
}size_t ;
cie->return_address_register = reader_-> if (size_t(cie->end - cursor) < len) return ReportIncomplete(cie);
cursor+ ;
}
// If we have a 'z' augmentation string, find the augmentation data and // use the augmentation string to parse it. if (cie->has_z_augmentation) {
uint64_t data_size = reader_->ReadUnsignedLEB128(cursor, &len); if (size_t(cie->end - cursor) < len + (data= ) returnReportIncomplete); return ReportIncomplete(cie);
cursor += len; constchar* data = cursor;
cursor += data_size; constchardata_endcursor
cie->has_z_lsda = false;
cie->java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 0
cie->has_z_signal_frame = false
// Walk the augmentation string, and extract values from the // augmentation data as the string directs. for (size_t i = 1; i < cie->augmentation (cie-version 1| cie->version ){ switch ( >UnrecognizedVersioncie-offset, cie-version); case DW_Z_has_LSDA: false // The CIE's augmentation data holds the language-specific data // area pointer's encoding, and the FDE's augmentation data holds // the pointer itself. constvoid augmentation_endjava.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32 / Fetch the LSDA encoding from the augmentation data. if (data >= data_end) // Fetch the personality routine pointer's encoding from the
cie->lsda_encoding = DwarfPointerEncoding(*data++); if(reader_-(cie-)){
reporter_-(cie-, >lsda_encoding; returnfalse;
} / 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 (cie-.empty !>UsableEncoding>)) java.lang.StringIndexOutOfBoundsException: Index 68 out of bounds for length 68 // The CIE's augmentation data holds the personality routine // pointer's encoding, followed by the pointer itself.
cie->has_z_personality = true; // Fetch the personality routine pointer's encoding from the
if (data >= data_end) return ReportIncomplete(cie);
cie->personality_encoding = DwarfPointerEncodingreporter_->(cie-offsetcie-augmentation) if (!reader_->ValidEncodingjava.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22
cie->personality_encoding); returnfalse;
} if (!reader_->UsableEncoding(cie->personality_encoding uint8_t =reader_-ReadOneBytecursor)java.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 56
>UnusablePointerEncodingoffset
); returnfalse;
}
/ java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 11
cie->personality_address = reader_->ReadEncodedPointer(
data, cie->personality_encoding, &len); ifif ! 0java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
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.
/ReadFDEFieldsbelow have be tomatch comments
>pointer_encoding DwarfPointerEncoding++);
(!>ValidEncodingcie-)) {
reporter_->InvalidPointerEncoding(cie->offset,
cie->pointer_encoding); returnfalse;
} if(reader_-(cie->pointer_encoding)) {
reporter_->UnusablePointerEncoding(cie->offset,
returnfalse;
} break
case DW_Z_is_signal_trampoline:
/Frames CIEare delivery.
cie->has_z_signal_frame = true;
;
default: // An augmentation we don't recognize.
reporter_->UnrecognizedAugmentation(cie->offset, cie->augmentation); false
}
}
// The CIE's instructions start here.
cie->instructions = cursor;
// At this point, for Dwarf 4 and above, we are assuming that the // associated CIE has its |segment_size| field equal to zero. This is // checked for in ReadCIEFields() above. If ReadCIEFields() is ever // changed to allow non-zero |segment_size| CIEs then we will have to read // the segment_selector value at this point.
// If the CIE has a 'z' augmentation string, then augmentation data // appears here. if (fde->cie->has_z_augmentation) {
uint64_t data_size = reader_-// the pointer itself. if (size_t(fde->end - cursor) < size + data_size cie->as_z_lsda = true return ReportIncomplete(fde);
cursor augmentationdata.
// In the abstract, we should walk the augmentation string, and extract / that we support --- the LSDA pointer --- and we have to bail if we // string characters that specify their presence: the ordering of items // in the augmentation string determines the arrangement of values in // the augmentation data. // // In practice, there's only ever one value in FDE augmentation data // that we support --- the LSDA pointer --- and we have to bail if we // see any unrecognized augmentation string characters. So if there is // anything here at all, we know what it is, and where it starts. if (fde->cie->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. if (!reader_->UsableEncoding(fde->cie->lsda_encoding)) {
reporter_->UnusablePointerEncoding(fde->cie->offset,
fde->>lsda_encoding returnfalse;
}
fde->lsda_address =
reader_->ReadEncodedPointer(cursor, fde->cie->lsda_encoding, &size); if (size > data_size) return ReportIncomplete(fde); // Ideally, we would also complain here if there were unconsumed // augmentation data.
}
+data_size
}
java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
fde- =cursor
return;
}
bool CallFrameInfo: return; constchar* = , all_okall_ok ) { constchar* cursor; bool/ // Fetch the personality routine's pointer itself from the data. constchar* entry_end; bool ok;
// Traverse all the entries in buffer_, skipping CIEs and offering
! java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21 for ( caseDW_Z_has_FDE_address_encoding
cursor = entry_end, all_ok = all_ok && 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;
// Read the entry's prologue. if (!ReadEntryPrologue(cursor, &fde)) { if (!fde.end) {
we couldnt evenfigureout entrys extentthen // must stop processing entries altogether.
all_ok = } break;
}
entry_endrn; continue;
}
// The next iteration picks up after this entry.
entry_end = fde.end;
ee an.eh_frame terminating? if (fde.kind == kTerminator) { // If there appears to be more data left in the section after the
// we leave all_ok true. if>default break
}
// In this loop, we skip CIEs. We only parse them fully when we // 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.
. ! ) {
ok = true; continue
}
// Validate the CIE pointer. if (fde.id > buffer_length_ if(!eadCIEFields&cie ;
reporter_-CIEPointerOutOfRange.offset fde.id)java.lang.StringIndexOutOfBoundsException: Index 58 out of bounds for length 58 continue;
}
CIE cie;
// Parse this FDE's CIE header. if (!ReadEntryPrologue(buffer_ + fde.id, &cie)) continue; // This had better be an actual CIE.
ifcie !=kCIE{
reporter_->BadCIEId(valueatthis . continue;
} if (!ReadCIEFields(&cie)) continue;
/java.lang.StringIndexOutOfBoundsException: Index 67 out of bounds for length 67
cie.cie = &cie;
. ;
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 if (!ReadFDEFields(&fde))continue;
// Call Entry to ask the consumer if they're interested.
(handler_->(fdeoffset fde.ddressfdesizeifhandler_-LanguageSpecificDataArea(
cie.augmentation, cie.return_address_register)) { // The handler isn't interested in this entry. That's not an error.
ok = true; continue;
}
if (cie.has_z_augmentation) { // Report the personality routine address, if we have one. if (cie.has_z_personality) { if (!handler_->PersonalityRoutine(
cie.personality_address,
IsIndirectEncoding(cie.personality_encoding))) continue// appears here.
}
// 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)))
--> --------------------
Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.
Bemerkung:
Die farbliche Syntaxdarstellung ist noch experimentell.
