mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-11-04 05:17:07 +00:00
61bd005d1b
RuntimeDyld symbol info previously consisted of just a Section/Offset pair. This patch replaces that pair type with a SymbolInfo class that also tracks symbol visibility. A new method, RuntimeDyld::getExportedSymbolLoadAddress, is introduced which only returns a non-zero result for exported symbols. For non-exported or non-existant symbols this method will return zero. The RuntimeDyld::getSymbolAddress method retains its current behavior, returning non-zero results for all symbols regardless of visibility. No in-tree clients of RuntimeDyld are changed. The newly introduced functionality will be used by the Orc APIs. No test case: Since this patch doesn't modify the behavior for any in-tree clients we don't have a good tool to test this with yet. Once Orc is in we can use it to write regression tests that test these changes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226341 91177308-0d34-0410-b5e6-96231b3b80d8
939 lines
34 KiB
C++
939 lines
34 KiB
C++
//===--- 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/ADT/STLExtras.h"
|
|
#include "RuntimeDyldCheckerImpl.h"
|
|
#include "RuntimeDyldImpl.h"
|
|
#include "llvm/ExecutionEngine/RuntimeDyldChecker.h"
|
|
#include "llvm/MC/MCContext.h"
|
|
#include "llvm/MC/MCDisassembler.h"
|
|
#include "llvm/MC/MCInst.h"
|
|
#include "llvm/Support/Path.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 RuntimeDyldCheckerImpl &Checker,
|
|
raw_ostream &ErrStream)
|
|
: Checker(Checker) {}
|
|
|
|
bool evaluate(StringRef Expr) const {
|
|
// Expect equality expression of the form 'LHS = RHS'.
|
|
Expr = Expr.trim();
|
|
size_t EQIdx = Expr.find('=');
|
|
|
|
ParseContext OutsideLoad(false);
|
|
|
|
// Evaluate LHS.
|
|
StringRef LHSExpr = Expr.substr(0, EQIdx).rtrim();
|
|
StringRef RemainingExpr;
|
|
EvalResult LHSResult;
|
|
std::tie(LHSResult, RemainingExpr) =
|
|
evalComplexExpr(evalSimpleExpr(LHSExpr, OutsideLoad), OutsideLoad);
|
|
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, OutsideLoad), OutsideLoad);
|
|
if (RHSResult.hasError())
|
|
return handleError(Expr, RHSResult);
|
|
if (RemainingExpr != "")
|
|
return handleError(Expr, unexpectedToken(RemainingExpr, RHSExpr, ""));
|
|
|
|
if (LHSResult.getValue() != RHSResult.getValue()) {
|
|
Checker.ErrStream << "Expression '" << Expr << "' is false: "
|
|
<< format("0x%" PRIx64, LHSResult.getValue())
|
|
<< " != " << format("0x%" PRIx64, RHSResult.getValue())
|
|
<< "\n";
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
private:
|
|
// RuntimeDyldCheckerExprEval requires some context when parsing exprs. In
|
|
// particular, it needs to know whether a symbol is being evaluated in the
|
|
// context of a load, in which case we want the linker's local address for
|
|
// the symbol, or outside of a load, in which case we want the symbol's
|
|
// address in the remote target.
|
|
|
|
struct ParseContext {
|
|
bool IsInsideLoad;
|
|
ParseContext(bool IsInsideLoad) : IsInsideLoad(IsInsideLoad) {}
|
|
};
|
|
|
|
const RuntimeDyldCheckerImpl &Checker;
|
|
|
|
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.");
|
|
Checker.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.isSymbolValid(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.\nInstruction is:\n ";
|
|
Inst.dump_pretty(ErrMsgStream,
|
|
Checker.Disassembler->getContext().getAsmInfo(),
|
|
Checker.InstPrinter);
|
|
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 of the
|
|
// expression remaining to be evaluated.
|
|
std::pair<EvalResult, StringRef> evalNextPC(StringRef Expr,
|
|
ParseContext PCtx) 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.isSymbolValid(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 InstSize;
|
|
if (!decodeInst(Symbol, Inst, InstSize))
|
|
return std::make_pair(
|
|
EvalResult(("Couldn't decode instruction at '" + Symbol + "'").str()),
|
|
"");
|
|
|
|
uint64_t SymbolAddr = PCtx.IsInsideLoad
|
|
? Checker.getSymbolLinkerAddr(Symbol)
|
|
: Checker.getSymbolRemoteAddr(Symbol);
|
|
uint64_t NextPC = SymbolAddr + InstSize;
|
|
|
|
return std::make_pair(EvalResult(NextPC), RemainingExpr);
|
|
}
|
|
|
|
// Evaluate a call to stub_addr.
|
|
// Look up and return the address of the stub for the given
|
|
// (<file name>, <section name>, <symbol name>) tuple.
|
|
// On success, returns a pair containing the stub address, plus the expression
|
|
// remaining to be evaluated.
|
|
std::pair<EvalResult, StringRef> evalStubAddr(StringRef Expr,
|
|
ParseContext PCtx) const {
|
|
if (!Expr.startswith("("))
|
|
return std::make_pair(unexpectedToken(Expr, Expr, "expected '('"), "");
|
|
StringRef RemainingExpr = Expr.substr(1).ltrim();
|
|
|
|
// Handle file-name specially, as it may contain characters that aren't
|
|
// legal for symbols.
|
|
StringRef FileName;
|
|
size_t ComaIdx = RemainingExpr.find(',');
|
|
FileName = RemainingExpr.substr(0, ComaIdx).rtrim();
|
|
RemainingExpr = RemainingExpr.substr(ComaIdx).ltrim();
|
|
|
|
if (!RemainingExpr.startswith(","))
|
|
return std::make_pair(
|
|
unexpectedToken(RemainingExpr, Expr, "expected ','"), "");
|
|
RemainingExpr = RemainingExpr.substr(1).ltrim();
|
|
|
|
StringRef SectionName;
|
|
std::tie(SectionName, RemainingExpr) = parseSymbol(RemainingExpr);
|
|
|
|
if (!RemainingExpr.startswith(","))
|
|
return std::make_pair(
|
|
unexpectedToken(RemainingExpr, Expr, "expected ','"), "");
|
|
RemainingExpr = RemainingExpr.substr(1).ltrim();
|
|
|
|
StringRef Symbol;
|
|
std::tie(Symbol, RemainingExpr) = parseSymbol(RemainingExpr);
|
|
|
|
if (!RemainingExpr.startswith(")"))
|
|
return std::make_pair(
|
|
unexpectedToken(RemainingExpr, Expr, "expected ')'"), "");
|
|
RemainingExpr = RemainingExpr.substr(1).ltrim();
|
|
|
|
uint64_t StubAddr;
|
|
std::string ErrorMsg = "";
|
|
std::tie(StubAddr, ErrorMsg) = Checker.getStubAddrFor(
|
|
FileName, SectionName, Symbol, PCtx.IsInsideLoad);
|
|
|
|
if (ErrorMsg != "")
|
|
return std::make_pair(EvalResult(ErrorMsg), "");
|
|
|
|
return std::make_pair(EvalResult(StubAddr), RemainingExpr);
|
|
}
|
|
|
|
std::pair<EvalResult, StringRef> evalSectionAddr(StringRef Expr,
|
|
ParseContext PCtx) const {
|
|
if (!Expr.startswith("("))
|
|
return std::make_pair(unexpectedToken(Expr, Expr, "expected '('"), "");
|
|
StringRef RemainingExpr = Expr.substr(1).ltrim();
|
|
|
|
// Handle file-name specially, as it may contain characters that aren't
|
|
// legal for symbols.
|
|
StringRef FileName;
|
|
size_t ComaIdx = RemainingExpr.find(',');
|
|
FileName = RemainingExpr.substr(0, ComaIdx).rtrim();
|
|
RemainingExpr = RemainingExpr.substr(ComaIdx).ltrim();
|
|
|
|
if (!RemainingExpr.startswith(","))
|
|
return std::make_pair(
|
|
unexpectedToken(RemainingExpr, Expr, "expected ','"), "");
|
|
RemainingExpr = RemainingExpr.substr(1).ltrim();
|
|
|
|
StringRef SectionName;
|
|
std::tie(SectionName, RemainingExpr) = parseSymbol(RemainingExpr);
|
|
|
|
if (!RemainingExpr.startswith(")"))
|
|
return std::make_pair(
|
|
unexpectedToken(RemainingExpr, Expr, "expected ')'"), "");
|
|
RemainingExpr = RemainingExpr.substr(1).ltrim();
|
|
|
|
uint64_t StubAddr;
|
|
std::string ErrorMsg = "";
|
|
std::tie(StubAddr, ErrorMsg) = Checker.getSectionAddr(
|
|
FileName, SectionName, PCtx.IsInsideLoad);
|
|
|
|
if (ErrorMsg != "")
|
|
return std::make_pair(EvalResult(ErrorMsg), "");
|
|
|
|
return std::make_pair(EvalResult(StubAddr), 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,
|
|
ParseContext PCtx) 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, PCtx);
|
|
else if (Symbol == "stub_addr")
|
|
return evalStubAddr(RemainingExpr, PCtx);
|
|
else if (Symbol == "section_addr")
|
|
return evalSectionAddr(RemainingExpr, PCtx);
|
|
|
|
if (!Checker.isSymbolValid(Symbol)) {
|
|
std::string ErrMsg("No known address for symbol '");
|
|
ErrMsg += Symbol;
|
|
ErrMsg += "'";
|
|
if (Symbol.startswith("L"))
|
|
ErrMsg += " (this appears to be an assembler local label - "
|
|
" perhaps drop the 'L'?)";
|
|
|
|
return std::make_pair(EvalResult(ErrMsg), "");
|
|
}
|
|
|
|
// The value for the symbol depends on the context we're evaluating in:
|
|
// Inside a load this is the address in the linker's memory, outside a
|
|
// load it's the address in the target processes memory.
|
|
uint64_t Value = PCtx.IsInsideLoad ? Checker.getSymbolLinkerAddr(Symbol)
|
|
: Checker.getSymbolRemoteAddr(Symbol);
|
|
|
|
// Looks like a plain symbol reference.
|
|
return std::make_pair(EvalResult(Value), 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,
|
|
ParseContext PCtx) const {
|
|
assert(Expr.startswith("(") && "Not a parenthesized expression");
|
|
EvalResult SubExprResult;
|
|
StringRef RemainingExpr;
|
|
std::tie(SubExprResult, RemainingExpr) =
|
|
evalComplexExpr(evalSimpleExpr(Expr.substr(1).ltrim(), PCtx), PCtx);
|
|
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>}<expr>
|
|
// 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();
|
|
|
|
// Evaluate the expression representing the load address.
|
|
ParseContext LoadCtx(true);
|
|
EvalResult LoadAddrExprResult;
|
|
std::tie(LoadAddrExprResult, RemainingExpr) =
|
|
evalComplexExpr(evalSimpleExpr(RemainingExpr, LoadCtx), LoadCtx);
|
|
|
|
if (LoadAddrExprResult.hasError())
|
|
return std::make_pair(LoadAddrExprResult, "");
|
|
|
|
uint64_t LoadAddr = LoadAddrExprResult.getValue();
|
|
|
|
return std::make_pair(
|
|
EvalResult(Checker.readMemoryAtAddr(LoadAddr, 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,
|
|
ParseContext PCtx) 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, PCtx);
|
|
else if (Expr[0] == '*')
|
|
std::tie(SubExprResult, RemainingExpr) = evalLoadExpr(Expr);
|
|
else if (isalpha(Expr[0]) || Expr[0] == '_')
|
|
std::tie(SubExprResult, RemainingExpr) = evalIdentifierExpr(Expr, PCtx);
|
|
else if (isdigit(Expr[0]))
|
|
std::tie(SubExprResult, RemainingExpr) = evalNumberExpr(Expr);
|
|
else
|
|
return std::make_pair(
|
|
unexpectedToken(Expr, Expr,
|
|
"expected '(', '*', identifier, or number"), "");
|
|
|
|
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> LHSAndRemaining,
|
|
ParseContext PCtx) const {
|
|
EvalResult LHSResult;
|
|
StringRef RemainingExpr;
|
|
std::tie(LHSResult, RemainingExpr) = LHSAndRemaining;
|
|
|
|
// 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, PCtx);
|
|
|
|
// 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), PCtx);
|
|
}
|
|
|
|
bool decodeInst(StringRef Symbol, MCInst &Inst, uint64_t &Size) const {
|
|
MCDisassembler *Dis = Checker.Disassembler;
|
|
StringRef SectionMem = Checker.getSubsectionStartingAt(Symbol);
|
|
ArrayRef<uint8_t> SectionBytes(
|
|
reinterpret_cast<const uint8_t *>(SectionMem.data()),
|
|
SectionMem.size());
|
|
|
|
MCDisassembler::DecodeStatus S =
|
|
Dis->getInstruction(Inst, Size, SectionBytes, 0, nulls(), nulls());
|
|
|
|
return (S == MCDisassembler::Success);
|
|
}
|
|
};
|
|
}
|
|
|
|
RuntimeDyldCheckerImpl::RuntimeDyldCheckerImpl(RuntimeDyld &RTDyld,
|
|
MCDisassembler *Disassembler,
|
|
MCInstPrinter *InstPrinter,
|
|
raw_ostream &ErrStream)
|
|
: RTDyld(RTDyld), Disassembler(Disassembler), InstPrinter(InstPrinter),
|
|
ErrStream(ErrStream) {
|
|
RTDyld.Checker = this;
|
|
}
|
|
|
|
bool RuntimeDyldCheckerImpl::check(StringRef CheckExpr) const {
|
|
CheckExpr = CheckExpr.trim();
|
|
DEBUG(dbgs() << "RuntimeDyldChecker: Checking '" << CheckExpr << "'...\n");
|
|
RuntimeDyldCheckerExprEval P(*this, ErrStream);
|
|
bool Result = P.evaluate(CheckExpr);
|
|
(void)Result;
|
|
DEBUG(dbgs() << "RuntimeDyldChecker: '" << CheckExpr << "' "
|
|
<< (Result ? "passed" : "FAILED") << ".\n");
|
|
return Result;
|
|
}
|
|
|
|
bool RuntimeDyldCheckerImpl::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 RuntimeDyldCheckerImpl::isSymbolValid(StringRef Symbol) const {
|
|
return getRTDyld().getSymbolAddress(Symbol) != nullptr;
|
|
}
|
|
|
|
uint64_t RuntimeDyldCheckerImpl::getSymbolLinkerAddr(StringRef Symbol) const {
|
|
return static_cast<uint64_t>(
|
|
reinterpret_cast<uintptr_t>(getRTDyld().getSymbolAddress(Symbol)));
|
|
}
|
|
|
|
uint64_t RuntimeDyldCheckerImpl::getSymbolRemoteAddr(StringRef Symbol) const {
|
|
if (uint64_t InternalSymbolAddr = getRTDyld().getSymbolLoadAddress(Symbol))
|
|
return InternalSymbolAddr;
|
|
return getRTDyld().MemMgr->getSymbolAddress(Symbol);
|
|
}
|
|
|
|
uint64_t RuntimeDyldCheckerImpl::readMemoryAtAddr(uint64_t SrcAddr,
|
|
unsigned Size) const {
|
|
uintptr_t PtrSizedAddr = static_cast<uintptr_t>(SrcAddr);
|
|
assert(PtrSizedAddr == SrcAddr && "Linker memory pointer out-of-range.");
|
|
uint8_t *Src = reinterpret_cast<uint8_t*>(PtrSizedAddr);
|
|
return getRTDyld().readBytesUnaligned(Src, Size);
|
|
}
|
|
|
|
|
|
std::pair<const RuntimeDyldCheckerImpl::SectionAddressInfo*, std::string>
|
|
RuntimeDyldCheckerImpl::findSectionAddrInfo(StringRef FileName,
|
|
StringRef SectionName) const {
|
|
|
|
auto SectionMapItr = Stubs.find(FileName);
|
|
if (SectionMapItr == Stubs.end()) {
|
|
std::string ErrorMsg = "File '";
|
|
ErrorMsg += FileName;
|
|
ErrorMsg += "' not found. ";
|
|
if (Stubs.empty())
|
|
ErrorMsg += "No stubs registered.";
|
|
else {
|
|
ErrorMsg += "Available files are:";
|
|
for (const auto& StubEntry : Stubs) {
|
|
ErrorMsg += " '";
|
|
ErrorMsg += StubEntry.first;
|
|
ErrorMsg += "'";
|
|
}
|
|
}
|
|
ErrorMsg += "\n";
|
|
return std::make_pair(nullptr, ErrorMsg);
|
|
}
|
|
|
|
auto SectionInfoItr = SectionMapItr->second.find(SectionName);
|
|
if (SectionInfoItr == SectionMapItr->second.end())
|
|
return std::make_pair(nullptr,
|
|
("Section '" + SectionName + "' not found in file '" +
|
|
FileName + "'\n").str());
|
|
|
|
return std::make_pair(&SectionInfoItr->second, std::string(""));
|
|
}
|
|
|
|
std::pair<uint64_t, std::string> RuntimeDyldCheckerImpl::getSectionAddr(
|
|
StringRef FileName, StringRef SectionName, bool IsInsideLoad) const {
|
|
|
|
const SectionAddressInfo *SectionInfo = nullptr;
|
|
{
|
|
std::string ErrorMsg;
|
|
std::tie(SectionInfo, ErrorMsg) =
|
|
findSectionAddrInfo(FileName, SectionName);
|
|
if (ErrorMsg != "")
|
|
return std::make_pair(0, ErrorMsg);
|
|
}
|
|
|
|
unsigned SectionID = SectionInfo->SectionID;
|
|
uint64_t Addr;
|
|
if (IsInsideLoad)
|
|
Addr =
|
|
static_cast<uint64_t>(
|
|
reinterpret_cast<uintptr_t>(getRTDyld().Sections[SectionID].Address));
|
|
else
|
|
Addr = getRTDyld().Sections[SectionID].LoadAddress;
|
|
|
|
return std::make_pair(Addr, std::string(""));
|
|
}
|
|
|
|
std::pair<uint64_t, std::string> RuntimeDyldCheckerImpl::getStubAddrFor(
|
|
StringRef FileName, StringRef SectionName, StringRef SymbolName,
|
|
bool IsInsideLoad) const {
|
|
|
|
const SectionAddressInfo *SectionInfo = nullptr;
|
|
{
|
|
std::string ErrorMsg;
|
|
std::tie(SectionInfo, ErrorMsg) =
|
|
findSectionAddrInfo(FileName, SectionName);
|
|
if (ErrorMsg != "")
|
|
return std::make_pair(0, ErrorMsg);
|
|
}
|
|
|
|
unsigned SectionID = SectionInfo->SectionID;
|
|
const StubOffsetsMap &SymbolStubs = SectionInfo->StubOffsets;
|
|
auto StubOffsetItr = SymbolStubs.find(SymbolName);
|
|
if (StubOffsetItr == SymbolStubs.end())
|
|
return std::make_pair(0,
|
|
("Stub for symbol '" + SymbolName + "' not found. "
|
|
"If '" + SymbolName + "' is an internal symbol this "
|
|
"may indicate that the stub target offset is being "
|
|
"computed incorrectly.\n").str());
|
|
|
|
uint64_t StubOffset = StubOffsetItr->second;
|
|
|
|
uint64_t Addr;
|
|
if (IsInsideLoad) {
|
|
uintptr_t SectionBase =
|
|
reinterpret_cast<uintptr_t>(getRTDyld().Sections[SectionID].Address);
|
|
Addr = static_cast<uint64_t>(SectionBase) + StubOffset;
|
|
} else {
|
|
uint64_t SectionBase = getRTDyld().Sections[SectionID].LoadAddress;
|
|
Addr = SectionBase + StubOffset;
|
|
}
|
|
|
|
return std::make_pair(Addr, std::string(""));
|
|
}
|
|
|
|
StringRef
|
|
RuntimeDyldCheckerImpl::getSubsectionStartingAt(StringRef Name) const {
|
|
RTDyldSymbolTable::const_iterator pos =
|
|
getRTDyld().GlobalSymbolTable.find(Name);
|
|
if (pos == getRTDyld().GlobalSymbolTable.end())
|
|
return StringRef();
|
|
const auto &SymInfo = pos->second;
|
|
uint8_t *SectionAddr = getRTDyld().getSectionAddress(SymInfo.getSectionID());
|
|
return StringRef(reinterpret_cast<const char *>(SectionAddr) +
|
|
SymInfo.getOffset(),
|
|
getRTDyld().Sections[SymInfo.getSectionID()].Size -
|
|
SymInfo.getOffset());
|
|
}
|
|
|
|
void RuntimeDyldCheckerImpl::registerSection(
|
|
StringRef FilePath, unsigned SectionID) {
|
|
StringRef FileName = sys::path::filename(FilePath);
|
|
const SectionEntry &Section = getRTDyld().Sections[SectionID];
|
|
StringRef SectionName = Section.Name;
|
|
|
|
Stubs[FileName][SectionName].SectionID = SectionID;
|
|
}
|
|
|
|
void RuntimeDyldCheckerImpl::registerStubMap(
|
|
StringRef FilePath, unsigned SectionID,
|
|
const RuntimeDyldImpl::StubMap &RTDyldStubs) {
|
|
StringRef FileName = sys::path::filename(FilePath);
|
|
const SectionEntry &Section = getRTDyld().Sections[SectionID];
|
|
StringRef SectionName = Section.Name;
|
|
|
|
Stubs[FileName][SectionName].SectionID = SectionID;
|
|
|
|
for (auto &StubMapEntry : RTDyldStubs) {
|
|
std::string SymbolName = "";
|
|
|
|
if (StubMapEntry.first.SymbolName)
|
|
SymbolName = StubMapEntry.first.SymbolName;
|
|
else {
|
|
// If this is a (Section, Offset) pair, do a reverse lookup in the
|
|
// global symbol table to find the name.
|
|
for (auto &GSTEntry : getRTDyld().GlobalSymbolTable) {
|
|
const auto &SymInfo = GSTEntry.second;
|
|
if (SymInfo.getSectionID() == StubMapEntry.first.SectionID &&
|
|
SymInfo.getOffset() ==
|
|
static_cast<uint64_t>(StubMapEntry.first.Offset)) {
|
|
SymbolName = GSTEntry.first();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (SymbolName != "")
|
|
Stubs[FileName][SectionName].StubOffsets[SymbolName] =
|
|
StubMapEntry.second;
|
|
}
|
|
}
|
|
|
|
RuntimeDyldChecker::RuntimeDyldChecker(RuntimeDyld &RTDyld,
|
|
MCDisassembler *Disassembler,
|
|
MCInstPrinter *InstPrinter,
|
|
raw_ostream &ErrStream)
|
|
: Impl(make_unique<RuntimeDyldCheckerImpl>(RTDyld, Disassembler,
|
|
InstPrinter, ErrStream)) {}
|
|
|
|
RuntimeDyldChecker::~RuntimeDyldChecker() {}
|
|
|
|
RuntimeDyld& RuntimeDyldChecker::getRTDyld() {
|
|
return Impl->RTDyld;
|
|
}
|
|
|
|
const RuntimeDyld& RuntimeDyldChecker::getRTDyld() const {
|
|
return Impl->RTDyld;
|
|
}
|
|
|
|
bool RuntimeDyldChecker::check(StringRef CheckExpr) const {
|
|
return Impl->check(CheckExpr);
|
|
}
|
|
|
|
bool RuntimeDyldChecker::checkAllRulesInBuffer(StringRef RulePrefix,
|
|
MemoryBuffer *MemBuf) const {
|
|
return Impl->checkAllRulesInBuffer(RulePrefix, MemBuf);
|
|
}
|
|
|
|
std::pair<uint64_t, std::string>
|
|
RuntimeDyldChecker::getSectionAddr(StringRef FileName, StringRef SectionName,
|
|
bool LinkerAddress) {
|
|
return Impl->getSectionAddr(FileName, SectionName, LinkerAddress);
|
|
}
|