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-rw-r--r--lib/ExecutionEngine/RuntimeDyld/RuntimeDyldChecker.cpp641
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diff --git a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldChecker.cpp b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldChecker.cpp
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+++ b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldChecker.cpp
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+//===--- RuntimeDyldChecker.cpp - RuntimeDyld tester framework --*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ExecutionEngine/RuntimeDyldChecker.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCDisassembler.h"
+#include "llvm/MC/MCInst.h"
+#include "llvm/Support/StringRefMemoryObject.h"
+#include "RuntimeDyldImpl.h"
+#include <cctype>
+#include <memory>
+
+#define DEBUG_TYPE "rtdyld"
+
+using namespace llvm;
+
+namespace llvm {
+
+ // Helper class that implements the language evaluated by RuntimeDyldChecker.
+ class RuntimeDyldCheckerExprEval {
+ public:
+
+ RuntimeDyldCheckerExprEval(const RuntimeDyldChecker &Checker,
+ llvm::raw_ostream &ErrStream)
+ : Checker(Checker), ErrStream(ErrStream) {}
+
+ bool evaluate(StringRef Expr) const {
+ // Expect equality expression of the form 'LHS = RHS'.
+ Expr = Expr.trim();
+ size_t EQIdx = Expr.find('=');
+
+ // Evaluate LHS.
+ StringRef LHSExpr = Expr.substr(0, EQIdx).rtrim();
+ StringRef RemainingExpr;
+ EvalResult LHSResult;
+ std::tie(LHSResult, RemainingExpr) =
+ evalComplexExpr(evalSimpleExpr(LHSExpr));
+ if (LHSResult.hasError())
+ return handleError(Expr, LHSResult);
+ if (RemainingExpr != "")
+ return handleError(Expr, unexpectedToken(RemainingExpr, LHSExpr, ""));
+
+ // Evaluate RHS.
+ StringRef RHSExpr = Expr.substr(EQIdx + 1).ltrim();
+ EvalResult RHSResult;
+ std::tie(RHSResult, RemainingExpr) =
+ evalComplexExpr(evalSimpleExpr(RHSExpr));
+ if (RHSResult.hasError())
+ return handleError(Expr, RHSResult);
+ if (RemainingExpr != "")
+ return handleError(Expr, unexpectedToken(RemainingExpr, RHSExpr, ""));
+
+ if (LHSResult.getValue() != RHSResult.getValue()) {
+ ErrStream << "Expression '" << Expr << "' is false: "
+ << format("0x%lx", LHSResult.getValue()) << " != "
+ << format("0x%lx", RHSResult.getValue()) << "\n";
+ return false;
+ }
+ return true;
+ }
+
+ private:
+ const RuntimeDyldChecker &Checker;
+ llvm::raw_ostream &ErrStream;
+
+ enum class BinOpToken : unsigned { Invalid, Add, Sub, BitwiseAnd,
+ BitwiseOr, ShiftLeft, ShiftRight };
+
+ class EvalResult {
+ public:
+ EvalResult()
+ : Value(0), ErrorMsg("") {}
+ EvalResult(uint64_t Value)
+ : Value(Value), ErrorMsg("") {}
+ EvalResult(std::string ErrorMsg)
+ : Value(0), ErrorMsg(ErrorMsg) {}
+ uint64_t getValue() const { return Value; }
+ bool hasError() const { return ErrorMsg != ""; }
+ const std::string& getErrorMsg() const { return ErrorMsg; }
+ private:
+ uint64_t Value;
+ std::string ErrorMsg;
+ };
+
+ StringRef getTokenForError(StringRef Expr) const {
+ if (Expr.empty())
+ return "";
+
+ StringRef Token, Remaining;
+ if (isalpha(Expr[0]))
+ std::tie(Token, Remaining) = parseSymbol(Expr);
+ else if (isdigit(Expr[0]))
+ std::tie(Token, Remaining) = parseNumberString(Expr);
+ else {
+ unsigned TokLen = 1;
+ if (Expr.startswith("<<") || Expr.startswith(">>"))
+ TokLen = 2;
+ Token = Expr.substr(0, TokLen);
+ }
+ return Token;
+ }
+
+ EvalResult unexpectedToken(StringRef TokenStart,
+ StringRef SubExpr,
+ StringRef ErrText) const {
+ std::string ErrorMsg("Encountered unexpected token '");
+ ErrorMsg += getTokenForError(TokenStart);
+ if (SubExpr != "") {
+ ErrorMsg += "' while parsing subexpression '";
+ ErrorMsg += SubExpr;
+ }
+ ErrorMsg += "'";
+ if (ErrText != "") {
+ ErrorMsg += " ";
+ ErrorMsg += ErrText;
+ }
+ return EvalResult(std::move(ErrorMsg));
+ }
+
+ bool handleError(StringRef Expr, const EvalResult &R) const {
+ assert(R.hasError() && "Not an error result.");
+ ErrStream << "Error evaluating expression '" << Expr << "': "
+ << R.getErrorMsg() << "\n";
+ return false;
+ }
+
+ std::pair<BinOpToken, StringRef> parseBinOpToken(StringRef Expr) const {
+ if (Expr.empty())
+ return std::make_pair(BinOpToken::Invalid, "");
+
+ // Handle the two 2-character tokens.
+ if (Expr.startswith("<<"))
+ return std::make_pair(BinOpToken::ShiftLeft,
+ Expr.substr(2).ltrim());
+ if (Expr.startswith(">>"))
+ return std::make_pair(BinOpToken::ShiftRight,
+ Expr.substr(2).ltrim());
+
+ // Handle one-character tokens.
+ BinOpToken Op;
+ switch (Expr[0]) {
+ default: return std::make_pair(BinOpToken::Invalid, Expr);
+ case '+': Op = BinOpToken::Add; break;
+ case '-': Op = BinOpToken::Sub; break;
+ case '&': Op = BinOpToken::BitwiseAnd; break;
+ case '|': Op = BinOpToken::BitwiseOr; break;
+ }
+
+ return std::make_pair(Op, Expr.substr(1).ltrim());
+ }
+
+ EvalResult computeBinOpResult(BinOpToken Op, const EvalResult &LHSResult,
+ const EvalResult &RHSResult) const {
+ switch (Op) {
+ default: llvm_unreachable("Tried to evaluate unrecognized operation.");
+ case BinOpToken::Add:
+ return EvalResult(LHSResult.getValue() + RHSResult.getValue());
+ case BinOpToken::Sub:
+ return EvalResult(LHSResult.getValue() - RHSResult.getValue());
+ case BinOpToken::BitwiseAnd:
+ return EvalResult(LHSResult.getValue() & RHSResult.getValue());
+ case BinOpToken::BitwiseOr:
+ return EvalResult(LHSResult.getValue() | RHSResult.getValue());
+ case BinOpToken::ShiftLeft:
+ return EvalResult(LHSResult.getValue() << RHSResult.getValue());
+ case BinOpToken::ShiftRight:
+ return EvalResult(LHSResult.getValue() >> RHSResult.getValue());
+ }
+ }
+
+ // Parse a symbol and return a (string, string) pair representing the symbol
+ // name and expression remaining to be parsed.
+ std::pair<StringRef, StringRef> parseSymbol(StringRef Expr) const {
+ size_t FirstNonSymbol =
+ Expr.find_first_not_of("0123456789"
+ "abcdefghijklmnopqrstuvwxyz"
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+ ":_");
+ return std::make_pair(Expr.substr(0, FirstNonSymbol),
+ Expr.substr(FirstNonSymbol).ltrim());
+ }
+
+ // Evaluate a call to decode_operand. Decode the instruction operand at the
+ // given symbol and get the value of the requested operand.
+ // Returns an error if the instruction cannot be decoded, or the requested
+ // operand is not an immediate.
+ // On success, retuns a pair containing the value of the operand, plus
+ // the expression remaining to be evaluated.
+ std::pair<EvalResult, StringRef> evalDecodeOperand(StringRef Expr) const {
+ if (!Expr.startswith("("))
+ return std::make_pair(unexpectedToken(Expr, Expr, "expected '('"), "");
+ StringRef RemainingExpr = Expr.substr(1).ltrim();
+ StringRef Symbol;
+ std::tie(Symbol, RemainingExpr) = parseSymbol(RemainingExpr);
+
+ if (!Checker.checkSymbolIsValidForLoad(Symbol))
+ return std::make_pair(EvalResult(("Cannot decode unknown symbol '" +
+ Symbol + "'").str()),
+ "");
+
+ if (!RemainingExpr.startswith(","))
+ return std::make_pair(unexpectedToken(RemainingExpr, RemainingExpr,
+ "expected ','"),
+ "");
+ RemainingExpr = RemainingExpr.substr(1).ltrim();
+
+ EvalResult OpIdxExpr;
+ std::tie(OpIdxExpr, RemainingExpr) = evalNumberExpr(RemainingExpr);
+ if (OpIdxExpr.hasError())
+ return std::make_pair(OpIdxExpr, "");
+
+ if (!RemainingExpr.startswith(")"))
+ return std::make_pair(unexpectedToken(RemainingExpr, RemainingExpr,
+ "expected ')'"),
+ "");
+ RemainingExpr = RemainingExpr.substr(1).ltrim();
+
+ MCInst Inst;
+ uint64_t Size;
+ if (!decodeInst(Symbol, Inst, Size))
+ return std::make_pair(EvalResult(("Couldn't decode instruction at '" +
+ Symbol + "'").str()),
+ "");
+
+ unsigned OpIdx = OpIdxExpr.getValue();
+ if (OpIdx >= Inst.getNumOperands()) {
+ std::string ErrMsg;
+ raw_string_ostream ErrMsgStream(ErrMsg);
+ ErrMsgStream << "Invalid operand index '" << format("%i", OpIdx)
+ << " for instruction '" << Symbol
+ << ". Instruction has only "
+ << format("%i", Inst.getNumOperands()) << " operands.";
+ return std::make_pair(EvalResult(ErrMsgStream.str()), "");
+ }
+
+ const MCOperand &Op = Inst.getOperand(OpIdx);
+ if (!Op.isImm()) {
+ std::string ErrMsg;
+ raw_string_ostream ErrMsgStream(ErrMsg);
+ ErrMsgStream << "Operand '" << format("%i", OpIdx)
+ << "' of instruction '" << Symbol
+ << "' is not an immediate.\nInstruction is:\n ";
+ Inst.dump_pretty(ErrMsgStream,
+ Checker.Disassembler->getContext().getAsmInfo(),
+ Checker.InstPrinter);
+
+ return std::make_pair(EvalResult(ErrMsgStream.str()), "");
+ }
+
+ return std::make_pair(EvalResult(Op.getImm()), RemainingExpr);
+ }
+
+ // Evaluate a call to next_pc. Decode the instruction at the given
+ // symbol and return the following program counter..
+ // Returns an error if the instruction cannot be decoded.
+ // On success, returns a pair containing the next PC, plus the length of the
+ // expression remaining to be evaluated.
+ std::pair<EvalResult, StringRef> evalNextPC(StringRef Expr) const {
+ if (!Expr.startswith("("))
+ return std::make_pair(unexpectedToken(Expr, Expr, "expected '('"), "");
+ StringRef RemainingExpr = Expr.substr(1).ltrim();
+ StringRef Symbol;
+ std::tie(Symbol, RemainingExpr) = parseSymbol(RemainingExpr);
+
+ if (!Checker.checkSymbolIsValidForLoad(Symbol))
+ return std::make_pair(EvalResult(("Cannot decode unknown symbol '"
+ + Symbol + "'").str()),
+ "");
+
+ if (!RemainingExpr.startswith(")"))
+ return std::make_pair(unexpectedToken(RemainingExpr, RemainingExpr,
+ "expected ')'"),
+ "");
+ RemainingExpr = RemainingExpr.substr(1).ltrim();
+
+ MCInst Inst;
+ uint64_t Size;
+ if (!decodeInst(Symbol, Inst, Size))
+ return std::make_pair(EvalResult(("Couldn't decode instruction at '" +
+ Symbol + "'").str()),
+ "");
+ uint64_t NextPC = Checker.getSymbolAddress(Symbol) + Size;
+
+ return std::make_pair(EvalResult(NextPC), RemainingExpr);
+ }
+
+ // Evaluate an identiefer expr, which may be a symbol, or a call to
+ // one of the builtin functions: get_insn_opcode or get_insn_length.
+ // Return the result, plus the expression remaining to be parsed.
+ std::pair<EvalResult, StringRef> evalIdentifierExpr(StringRef Expr) const {
+ StringRef Symbol;
+ StringRef RemainingExpr;
+ std::tie(Symbol, RemainingExpr) = parseSymbol(Expr);
+
+ // Check for builtin function calls.
+ if (Symbol == "decode_operand")
+ return evalDecodeOperand(RemainingExpr);
+ else if (Symbol == "next_pc")
+ return evalNextPC(RemainingExpr);
+
+ // Looks like a plain symbol reference.
+ return std::make_pair(EvalResult(Checker.getSymbolAddress(Symbol)),
+ RemainingExpr);
+ }
+
+ // Parse a number (hexadecimal or decimal) and return a (string, string)
+ // pair representing the number and the expression remaining to be parsed.
+ std::pair<StringRef, StringRef> parseNumberString(StringRef Expr) const {
+ size_t FirstNonDigit = StringRef::npos;
+ if (Expr.startswith("0x")) {
+ FirstNonDigit = Expr.find_first_not_of("0123456789abcdefABCDEF", 2);
+ if (FirstNonDigit == StringRef::npos)
+ FirstNonDigit = Expr.size();
+ } else {
+ FirstNonDigit = Expr.find_first_not_of("0123456789");
+ if (FirstNonDigit == StringRef::npos)
+ FirstNonDigit = Expr.size();
+ }
+ return std::make_pair(Expr.substr(0, FirstNonDigit),
+ Expr.substr(FirstNonDigit));
+ }
+
+ // Evaluate a constant numeric expression (hexidecimal or decimal) and
+ // return a pair containing the result, and the expression remaining to be
+ // evaluated.
+ std::pair<EvalResult, StringRef> evalNumberExpr(StringRef Expr) const {
+ StringRef ValueStr;
+ StringRef RemainingExpr;
+ std::tie(ValueStr, RemainingExpr) = parseNumberString(Expr);
+
+ if (ValueStr.empty() || !isdigit(ValueStr[0]))
+ return std::make_pair(unexpectedToken(RemainingExpr, RemainingExpr,
+ "expected number"),
+ "");
+ uint64_t Value;
+ ValueStr.getAsInteger(0, Value);
+ return std::make_pair(EvalResult(Value), RemainingExpr);
+ }
+
+ // Evaluate an expression of the form "(<expr>)" and return a pair
+ // containing the result of evaluating <expr>, plus the expression
+ // remaining to be parsed.
+ std::pair<EvalResult, StringRef> evalParensExpr(StringRef Expr) const {
+ assert(Expr.startswith("(") && "Not a parenthesized expression");
+ EvalResult SubExprResult;
+ StringRef RemainingExpr;
+ std::tie(SubExprResult, RemainingExpr) =
+ evalComplexExpr(evalSimpleExpr(Expr.substr(1).ltrim()));
+ if (SubExprResult.hasError())
+ return std::make_pair(SubExprResult, "");
+ if (!RemainingExpr.startswith(")"))
+ return std::make_pair(unexpectedToken(RemainingExpr, Expr,
+ "expected ')'"),
+ "");
+ RemainingExpr = RemainingExpr.substr(1).ltrim();
+ return std::make_pair(SubExprResult, RemainingExpr);
+ }
+
+ // Evaluate an expression in one of the following forms:
+ // *{<number>}<symbol>
+ // *{<number>}(<symbol> + <number>)
+ // *{<number>}(<symbol> - <number>)
+ // Return a pair containing the result, plus the expression remaining to be
+ // parsed.
+ std::pair<EvalResult, StringRef> evalLoadExpr(StringRef Expr) const {
+ assert(Expr.startswith("*") && "Not a load expression");
+ StringRef RemainingExpr = Expr.substr(1).ltrim();
+ // Parse read size.
+ if (!RemainingExpr.startswith("{"))
+ return std::make_pair(EvalResult("Expected '{' following '*'."), "");
+ RemainingExpr = RemainingExpr.substr(1).ltrim();
+ EvalResult ReadSizeExpr;
+ std::tie(ReadSizeExpr, RemainingExpr) = evalNumberExpr(RemainingExpr);
+ if (ReadSizeExpr.hasError())
+ return std::make_pair(ReadSizeExpr, RemainingExpr);
+ uint64_t ReadSize = ReadSizeExpr.getValue();
+ if (ReadSize < 1 || ReadSize > 8)
+ return std::make_pair(EvalResult("Invalid size for dereference."), "");
+ if (!RemainingExpr.startswith("}"))
+ return std::make_pair(EvalResult("Missing '}' for dereference."), "");
+ RemainingExpr = RemainingExpr.substr(1).ltrim();
+
+ // Check for '(symbol +/- constant)' form.
+ bool SymbolPlusConstant = false;
+ if (RemainingExpr.startswith("(")) {
+ SymbolPlusConstant = true;
+ RemainingExpr = RemainingExpr.substr(1).ltrim();
+ }
+
+ // Read symbol.
+ StringRef Symbol;
+ std::tie(Symbol, RemainingExpr) = parseSymbol(RemainingExpr);
+
+ if (!Checker.checkSymbolIsValidForLoad(Symbol))
+ return std::make_pair(EvalResult(("Cannot dereference unknown symbol '"
+ + Symbol + "'").str()),
+ "");
+
+ // Set up defaut offset.
+ int64_t Offset = 0;
+
+ // Handle "+/- constant)" portion if necessary.
+ if (SymbolPlusConstant) {
+ char OpChar = RemainingExpr[0];
+ if (OpChar != '+' && OpChar != '-')
+ return std::make_pair(EvalResult("Invalid operator in load address."),
+ "");
+ RemainingExpr = RemainingExpr.substr(1).ltrim();
+
+ EvalResult OffsetExpr;
+ std::tie(OffsetExpr, RemainingExpr) = evalNumberExpr(RemainingExpr);
+
+ Offset = (OpChar == '+') ?
+ OffsetExpr.getValue() : -1 * OffsetExpr.getValue();
+
+ if (!RemainingExpr.startswith(")"))
+ return std::make_pair(EvalResult("Missing ')' in load address."),
+ "");
+
+ RemainingExpr = RemainingExpr.substr(1).ltrim();
+ }
+
+ return std::make_pair(
+ EvalResult(Checker.readMemoryAtSymbol(Symbol, Offset, ReadSize)),
+ RemainingExpr);
+ }
+
+ // Evaluate a "simple" expression. This is any expression that _isn't_ an
+ // un-parenthesized binary expression.
+ //
+ // "Simple" expressions can be optionally bit-sliced. See evalSlicedExpr.
+ //
+ // Returns a pair containing the result of the evaluation, plus the
+ // expression remaining to be parsed.
+ std::pair<EvalResult, StringRef> evalSimpleExpr(StringRef Expr) const {
+ EvalResult SubExprResult;
+ StringRef RemainingExpr;
+
+ if (Expr.empty())
+ return std::make_pair(EvalResult("Unexpected end of expression"), "");
+
+ if (Expr[0] == '(')
+ std::tie(SubExprResult, RemainingExpr) = evalParensExpr(Expr);
+ else if (Expr[0] == '*')
+ std::tie(SubExprResult, RemainingExpr) = evalLoadExpr(Expr);
+ else if (isalpha(Expr[0]))
+ std::tie(SubExprResult, RemainingExpr) = evalIdentifierExpr(Expr);
+ else if (isdigit(Expr[0]))
+ std::tie(SubExprResult, RemainingExpr) = evalNumberExpr(Expr);
+
+ if (SubExprResult.hasError())
+ return std::make_pair(SubExprResult, RemainingExpr);
+
+ // Evaluate bit-slice if present.
+ if (RemainingExpr.startswith("["))
+ std::tie(SubExprResult, RemainingExpr) =
+ evalSliceExpr(std::make_pair(SubExprResult, RemainingExpr));
+
+ return std::make_pair(SubExprResult, RemainingExpr);
+ }
+
+ // Evaluate a bit-slice of an expression.
+ // A bit-slice has the form "<expr>[high:low]". The result of evaluating a
+ // slice is the bits between high and low (inclusive) in the original
+ // expression, right shifted so that the "low" bit is in position 0 in the
+ // result.
+ // Returns a pair containing the result of the slice operation, plus the
+ // expression remaining to be parsed.
+ std::pair<EvalResult, StringRef> evalSliceExpr(
+ std::pair<EvalResult, StringRef> Ctx) const{
+ EvalResult SubExprResult;
+ StringRef RemainingExpr;
+ std::tie(SubExprResult, RemainingExpr) = Ctx;
+
+ assert(RemainingExpr.startswith("[") && "Not a slice expr.");
+ RemainingExpr = RemainingExpr.substr(1).ltrim();
+
+ EvalResult HighBitExpr;
+ std::tie(HighBitExpr, RemainingExpr) = evalNumberExpr(RemainingExpr);
+
+ if (HighBitExpr.hasError())
+ return std::make_pair(HighBitExpr, RemainingExpr);
+
+ if (!RemainingExpr.startswith(":"))
+ return std::make_pair(unexpectedToken(RemainingExpr, RemainingExpr,
+ "expected ':'"),
+ "");
+ RemainingExpr = RemainingExpr.substr(1).ltrim();
+
+ EvalResult LowBitExpr;
+ std::tie(LowBitExpr, RemainingExpr) = evalNumberExpr(RemainingExpr);
+
+ if (LowBitExpr.hasError())
+ return std::make_pair(LowBitExpr, RemainingExpr);
+
+ if (!RemainingExpr.startswith("]"))
+ return std::make_pair(unexpectedToken(RemainingExpr, RemainingExpr,
+ "expected ']'"),
+ "");
+ RemainingExpr = RemainingExpr.substr(1).ltrim();
+
+ unsigned HighBit = HighBitExpr.getValue();
+ unsigned LowBit = LowBitExpr.getValue();
+ uint64_t Mask = ((uint64_t)1 << (HighBit - LowBit + 1)) - 1;
+ uint64_t SlicedValue = (SubExprResult.getValue() >> LowBit) & Mask;
+ return std::make_pair(EvalResult(SlicedValue), RemainingExpr);
+ }
+
+ // Evaluate a "complex" expression.
+ // Takes an already evaluated subexpression and checks for the presence of a
+ // binary operator, computing the result of the binary operation if one is
+ // found. Used to make arithmetic expressions left-associative.
+ // Returns a pair containing the ultimate result of evaluating the
+ // expression, plus the expression remaining to be evaluated.
+ std::pair<EvalResult, StringRef> evalComplexExpr(
+ std::pair<EvalResult, StringRef> Ctx) const {
+ EvalResult LHSResult;
+ StringRef RemainingExpr;
+ std::tie(LHSResult, RemainingExpr) = Ctx;
+
+ // If there was an error, or there's nothing left to evaluate, return the
+ // result.
+ if (LHSResult.hasError() || RemainingExpr == "")
+ return std::make_pair(LHSResult, RemainingExpr);
+
+ // Otherwise check if this is a binary expressioan.
+ BinOpToken BinOp;
+ std::tie(BinOp, RemainingExpr) = parseBinOpToken(RemainingExpr);
+
+ // If this isn't a recognized expression just return.
+ if (BinOp == BinOpToken::Invalid)
+ return std::make_pair(LHSResult, RemainingExpr);
+
+ // This is a recognized bin-op. Evaluate the RHS, then evaluate the binop.
+ EvalResult RHSResult;
+ std::tie(RHSResult, RemainingExpr) = evalSimpleExpr(RemainingExpr);
+
+ // If there was an error evaluating the RHS, return it.
+ if (RHSResult.hasError())
+ return std::make_pair(RHSResult, RemainingExpr);
+
+ // This is a binary expression - evaluate and try to continue as a
+ // complex expr.
+ EvalResult ThisResult(computeBinOpResult(BinOp, LHSResult, RHSResult));
+
+ return evalComplexExpr(std::make_pair(ThisResult, RemainingExpr));
+ }
+
+ bool decodeInst(StringRef Symbol, MCInst &Inst, uint64_t &Size) const {
+ MCDisassembler *Dis = Checker.Disassembler;
+ StringRef SectionMem = Checker.getSubsectionStartingAt(Symbol);
+ StringRefMemoryObject SectionBytes(SectionMem, 0);
+
+ MCDisassembler::DecodeStatus S =
+ Dis->getInstruction(Inst, Size, SectionBytes, 0, nulls(), nulls());
+
+ return (S == MCDisassembler::Success);
+ }
+
+ };
+
+}
+
+bool RuntimeDyldChecker::check(StringRef CheckExpr) const {
+ CheckExpr = CheckExpr.trim();
+ DEBUG(llvm::dbgs() << "RuntimeDyldChecker: Checking '" << CheckExpr
+ << "'...\n");
+ RuntimeDyldCheckerExprEval P(*this, ErrStream);
+ bool Result = P.evaluate(CheckExpr);
+ (void)Result;
+ DEBUG(llvm::dbgs() << "RuntimeDyldChecker: '" << CheckExpr << "' "
+ << (Result ? "passed" : "FAILED") << ".\n");
+ return Result;
+}
+
+bool RuntimeDyldChecker::checkAllRulesInBuffer(StringRef RulePrefix,
+ MemoryBuffer* MemBuf) const {
+ bool DidAllTestsPass = true;
+ unsigned NumRules = 0;
+
+ const char *LineStart = MemBuf->getBufferStart();
+
+ // Eat whitespace.
+ while (LineStart != MemBuf->getBufferEnd() &&
+ std::isspace(*LineStart))
+ ++LineStart;
+
+ while (LineStart != MemBuf->getBufferEnd() && *LineStart != '\0') {
+ const char *LineEnd = LineStart;
+ while (LineEnd != MemBuf->getBufferEnd() &&
+ *LineEnd != '\r' && *LineEnd != '\n')
+ ++LineEnd;
+
+ StringRef Line(LineStart, LineEnd - LineStart);
+ if (Line.startswith(RulePrefix)) {
+ DidAllTestsPass &= check(Line.substr(RulePrefix.size()));
+ ++NumRules;
+ }
+
+ // Eat whitespace.
+ LineStart = LineEnd;
+ while (LineStart != MemBuf->getBufferEnd() &&
+ std::isspace(*LineStart))
+ ++LineStart;
+ }
+ return DidAllTestsPass && (NumRules != 0);
+}
+
+bool RuntimeDyldChecker::checkSymbolIsValidForLoad(StringRef Symbol) const {
+ return RTDyld.getSymbolAddress(Symbol) != nullptr;
+}
+
+uint64_t RuntimeDyldChecker::getSymbolAddress(StringRef Symbol) const {
+ return RTDyld.getAnySymbolRemoteAddress(Symbol);
+}
+
+uint64_t RuntimeDyldChecker::readMemoryAtSymbol(StringRef Symbol,
+ int64_t Offset,
+ unsigned Size) const {
+ uint8_t *Src = RTDyld.getSymbolAddress(Symbol);
+ uint64_t Result = 0;
+ memcpy(&Result, Src + Offset, Size);
+ return Result;
+}
+
+StringRef RuntimeDyldChecker::getSubsectionStartingAt(StringRef Name) const {
+ RuntimeDyldImpl::SymbolTableMap::const_iterator pos =
+ RTDyld.GlobalSymbolTable.find(Name);
+ if (pos == RTDyld.GlobalSymbolTable.end())
+ return StringRef();
+ RuntimeDyldImpl::SymbolLoc Loc = pos->second;
+ uint8_t *SectionAddr = RTDyld.getSectionAddress(Loc.first);
+ return StringRef(reinterpret_cast<const char*>(SectionAddr) + Loc.second,
+ RTDyld.Sections[Loc.first].Size - Loc.second);
+}