1 //===--- RuntimeDyldChecker.cpp - RuntimeDyld tester framework --*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/ADT/STLExtras.h"
11 #include "llvm/ExecutionEngine/RuntimeDyldChecker.h"
12 #include "llvm/MC/MCContext.h"
13 #include "llvm/MC/MCDisassembler.h"
14 #include "llvm/MC/MCInst.h"
15 #include "llvm/Support/Path.h"
16 #include "RuntimeDyldCheckerImpl.h"
17 #include "RuntimeDyldImpl.h"
21 #define DEBUG_TYPE "rtdyld"
27 // Helper class that implements the language evaluated by RuntimeDyldChecker.
28 class RuntimeDyldCheckerExprEval {
30 RuntimeDyldCheckerExprEval(const RuntimeDyldCheckerImpl &Checker,
31 raw_ostream &ErrStream)
34 bool evaluate(StringRef Expr) const {
35 // Expect equality expression of the form 'LHS = RHS'.
37 size_t EQIdx = Expr.find('=');
39 ParseContext OutsideLoad(false);
42 StringRef LHSExpr = Expr.substr(0, EQIdx).rtrim();
43 StringRef RemainingExpr;
45 std::tie(LHSResult, RemainingExpr) =
46 evalComplexExpr(evalSimpleExpr(LHSExpr, OutsideLoad), OutsideLoad);
47 if (LHSResult.hasError())
48 return handleError(Expr, LHSResult);
49 if (RemainingExpr != "")
50 return handleError(Expr, unexpectedToken(RemainingExpr, LHSExpr, ""));
53 StringRef RHSExpr = Expr.substr(EQIdx + 1).ltrim();
55 std::tie(RHSResult, RemainingExpr) =
56 evalComplexExpr(evalSimpleExpr(RHSExpr, OutsideLoad), OutsideLoad);
57 if (RHSResult.hasError())
58 return handleError(Expr, RHSResult);
59 if (RemainingExpr != "")
60 return handleError(Expr, unexpectedToken(RemainingExpr, RHSExpr, ""));
62 if (LHSResult.getValue() != RHSResult.getValue()) {
63 Checker.ErrStream << "Expression '" << Expr << "' is false: "
64 << format("0x%" PRIx64, LHSResult.getValue())
65 << " != " << format("0x%" PRIx64, RHSResult.getValue())
73 // RuntimeDyldCheckerExprEval requires some context when parsing exprs. In
74 // particular, it needs to know whether a symbol is being evaluated in the
75 // context of a load, in which case we want the linker's local address for
76 // the symbol, or outside of a load, in which case we want the symbol's
77 // address in the remote target.
81 ParseContext(bool IsInsideLoad) : IsInsideLoad(IsInsideLoad) {}
84 const RuntimeDyldCheckerImpl &Checker;
86 enum class BinOpToken : unsigned {
98 EvalResult() : Value(0), ErrorMsg("") {}
99 EvalResult(uint64_t Value) : Value(Value), ErrorMsg("") {}
100 EvalResult(std::string ErrorMsg) : Value(0), ErrorMsg(ErrorMsg) {}
101 uint64_t getValue() const { return Value; }
102 bool hasError() const { return ErrorMsg != ""; }
103 const std::string &getErrorMsg() const { return ErrorMsg; }
107 std::string ErrorMsg;
110 StringRef getTokenForError(StringRef Expr) const {
114 StringRef Token, Remaining;
115 if (isalpha(Expr[0]))
116 std::tie(Token, Remaining) = parseSymbol(Expr);
117 else if (isdigit(Expr[0]))
118 std::tie(Token, Remaining) = parseNumberString(Expr);
121 if (Expr.startswith("<<") || Expr.startswith(">>"))
123 Token = Expr.substr(0, TokLen);
128 EvalResult unexpectedToken(StringRef TokenStart, StringRef SubExpr,
129 StringRef ErrText) const {
130 std::string ErrorMsg("Encountered unexpected token '");
131 ErrorMsg += getTokenForError(TokenStart);
133 ErrorMsg += "' while parsing subexpression '";
141 return EvalResult(std::move(ErrorMsg));
144 bool handleError(StringRef Expr, const EvalResult &R) const {
145 assert(R.hasError() && "Not an error result.");
146 Checker.ErrStream << "Error evaluating expression '" << Expr
147 << "': " << R.getErrorMsg() << "\n";
151 std::pair<BinOpToken, StringRef> parseBinOpToken(StringRef Expr) const {
153 return std::make_pair(BinOpToken::Invalid, "");
155 // Handle the two 2-character tokens.
156 if (Expr.startswith("<<"))
157 return std::make_pair(BinOpToken::ShiftLeft, Expr.substr(2).ltrim());
158 if (Expr.startswith(">>"))
159 return std::make_pair(BinOpToken::ShiftRight, Expr.substr(2).ltrim());
161 // Handle one-character tokens.
165 return std::make_pair(BinOpToken::Invalid, Expr);
167 Op = BinOpToken::Add;
170 Op = BinOpToken::Sub;
173 Op = BinOpToken::BitwiseAnd;
176 Op = BinOpToken::BitwiseOr;
180 return std::make_pair(Op, Expr.substr(1).ltrim());
183 EvalResult computeBinOpResult(BinOpToken Op, const EvalResult &LHSResult,
184 const EvalResult &RHSResult) const {
187 llvm_unreachable("Tried to evaluate unrecognized operation.");
188 case BinOpToken::Add:
189 return EvalResult(LHSResult.getValue() + RHSResult.getValue());
190 case BinOpToken::Sub:
191 return EvalResult(LHSResult.getValue() - RHSResult.getValue());
192 case BinOpToken::BitwiseAnd:
193 return EvalResult(LHSResult.getValue() & RHSResult.getValue());
194 case BinOpToken::BitwiseOr:
195 return EvalResult(LHSResult.getValue() | RHSResult.getValue());
196 case BinOpToken::ShiftLeft:
197 return EvalResult(LHSResult.getValue() << RHSResult.getValue());
198 case BinOpToken::ShiftRight:
199 return EvalResult(LHSResult.getValue() >> RHSResult.getValue());
203 // Parse a symbol and return a (string, string) pair representing the symbol
204 // name and expression remaining to be parsed.
205 std::pair<StringRef, StringRef> parseSymbol(StringRef Expr) const {
206 size_t FirstNonSymbol = Expr.find_first_not_of("0123456789"
207 "abcdefghijklmnopqrstuvwxyz"
208 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
210 return std::make_pair(Expr.substr(0, FirstNonSymbol),
211 Expr.substr(FirstNonSymbol).ltrim());
214 // Evaluate a call to decode_operand. Decode the instruction operand at the
215 // given symbol and get the value of the requested operand.
216 // Returns an error if the instruction cannot be decoded, or the requested
217 // operand is not an immediate.
218 // On success, retuns a pair containing the value of the operand, plus
219 // the expression remaining to be evaluated.
220 std::pair<EvalResult, StringRef> evalDecodeOperand(StringRef Expr) const {
221 if (!Expr.startswith("("))
222 return std::make_pair(unexpectedToken(Expr, Expr, "expected '('"), "");
223 StringRef RemainingExpr = Expr.substr(1).ltrim();
225 std::tie(Symbol, RemainingExpr) = parseSymbol(RemainingExpr);
227 if (!Checker.isSymbolValid(Symbol))
228 return std::make_pair(
229 EvalResult(("Cannot decode unknown symbol '" + Symbol + "'").str()),
232 if (!RemainingExpr.startswith(","))
233 return std::make_pair(
234 unexpectedToken(RemainingExpr, RemainingExpr, "expected ','"), "");
235 RemainingExpr = RemainingExpr.substr(1).ltrim();
237 EvalResult OpIdxExpr;
238 std::tie(OpIdxExpr, RemainingExpr) = evalNumberExpr(RemainingExpr);
239 if (OpIdxExpr.hasError())
240 return std::make_pair(OpIdxExpr, "");
242 if (!RemainingExpr.startswith(")"))
243 return std::make_pair(
244 unexpectedToken(RemainingExpr, RemainingExpr, "expected ')'"), "");
245 RemainingExpr = RemainingExpr.substr(1).ltrim();
249 if (!decodeInst(Symbol, Inst, Size))
250 return std::make_pair(
251 EvalResult(("Couldn't decode instruction at '" + Symbol + "'").str()),
254 unsigned OpIdx = OpIdxExpr.getValue();
255 if (OpIdx >= Inst.getNumOperands()) {
257 raw_string_ostream ErrMsgStream(ErrMsg);
258 ErrMsgStream << "Invalid operand index '" << format("%i", OpIdx)
259 << "' for instruction '" << Symbol
260 << "'. Instruction has only "
261 << format("%i", Inst.getNumOperands())
262 << " operands.\nInstruction is:\n ";
263 Inst.dump_pretty(ErrMsgStream,
264 Checker.Disassembler->getContext().getAsmInfo(),
265 Checker.InstPrinter);
266 return std::make_pair(EvalResult(ErrMsgStream.str()), "");
269 const MCOperand &Op = Inst.getOperand(OpIdx);
272 raw_string_ostream ErrMsgStream(ErrMsg);
273 ErrMsgStream << "Operand '" << format("%i", OpIdx) << "' of instruction '"
274 << Symbol << "' is not an immediate.\nInstruction is:\n ";
275 Inst.dump_pretty(ErrMsgStream,
276 Checker.Disassembler->getContext().getAsmInfo(),
277 Checker.InstPrinter);
279 return std::make_pair(EvalResult(ErrMsgStream.str()), "");
282 return std::make_pair(EvalResult(Op.getImm()), RemainingExpr);
285 // Evaluate a call to next_pc.
286 // Decode the instruction at the given symbol and return the following program
288 // Returns an error if the instruction cannot be decoded.
289 // On success, returns a pair containing the next PC, plus of the
290 // expression remaining to be evaluated.
291 std::pair<EvalResult, StringRef> evalNextPC(StringRef Expr,
292 ParseContext PCtx) const {
293 if (!Expr.startswith("("))
294 return std::make_pair(unexpectedToken(Expr, Expr, "expected '('"), "");
295 StringRef RemainingExpr = Expr.substr(1).ltrim();
297 std::tie(Symbol, RemainingExpr) = parseSymbol(RemainingExpr);
299 if (!Checker.isSymbolValid(Symbol))
300 return std::make_pair(
301 EvalResult(("Cannot decode unknown symbol '" + Symbol + "'").str()),
304 if (!RemainingExpr.startswith(")"))
305 return std::make_pair(
306 unexpectedToken(RemainingExpr, RemainingExpr, "expected ')'"), "");
307 RemainingExpr = RemainingExpr.substr(1).ltrim();
311 if (!decodeInst(Symbol, Inst, InstSize))
312 return std::make_pair(
313 EvalResult(("Couldn't decode instruction at '" + Symbol + "'").str()),
316 uint64_t SymbolAddr = PCtx.IsInsideLoad
317 ? Checker.getSymbolLinkerAddr(Symbol)
318 : Checker.getSymbolRemoteAddr(Symbol);
319 uint64_t NextPC = SymbolAddr + InstSize;
321 return std::make_pair(EvalResult(NextPC), RemainingExpr);
324 // Evaluate a call to stub_addr.
325 // Look up and return the address of the stub for the given
326 // (<file name>, <section name>, <symbol name>) tuple.
327 // On success, returns a pair containing the stub address, plus the expression
328 // remaining to be evaluated.
329 std::pair<EvalResult, StringRef> evalStubAddr(StringRef Expr,
330 ParseContext PCtx) const {
331 if (!Expr.startswith("("))
332 return std::make_pair(unexpectedToken(Expr, Expr, "expected '('"), "");
333 StringRef RemainingExpr = Expr.substr(1).ltrim();
335 // Handle file-name specially, as it may contain characters that aren't
336 // legal for symbols.
338 size_t ComaIdx = RemainingExpr.find(',');
339 FileName = RemainingExpr.substr(0, ComaIdx).rtrim();
340 RemainingExpr = RemainingExpr.substr(ComaIdx).ltrim();
342 if (!RemainingExpr.startswith(","))
343 return std::make_pair(
344 unexpectedToken(RemainingExpr, Expr, "expected ','"), "");
345 RemainingExpr = RemainingExpr.substr(1).ltrim();
347 StringRef SectionName;
348 std::tie(SectionName, RemainingExpr) = parseSymbol(RemainingExpr);
350 if (!RemainingExpr.startswith(","))
351 return std::make_pair(
352 unexpectedToken(RemainingExpr, Expr, "expected ','"), "");
353 RemainingExpr = RemainingExpr.substr(1).ltrim();
356 std::tie(Symbol, RemainingExpr) = parseSymbol(RemainingExpr);
358 if (!RemainingExpr.startswith(")"))
359 return std::make_pair(
360 unexpectedToken(RemainingExpr, Expr, "expected ')'"), "");
361 RemainingExpr = RemainingExpr.substr(1).ltrim();
364 std::string ErrorMsg = "";
365 std::tie(StubAddr, ErrorMsg) = Checker.getStubAddrFor(
366 FileName, SectionName, Symbol, PCtx.IsInsideLoad);
369 return std::make_pair(EvalResult(ErrorMsg), "");
371 return std::make_pair(EvalResult(StubAddr), RemainingExpr);
374 std::pair<EvalResult, StringRef> evalSectionAddr(StringRef Expr,
375 ParseContext PCtx) const {
376 if (!Expr.startswith("("))
377 return std::make_pair(unexpectedToken(Expr, Expr, "expected '('"), "");
378 StringRef RemainingExpr = Expr.substr(1).ltrim();
380 // Handle file-name specially, as it may contain characters that aren't
381 // legal for symbols.
383 size_t ComaIdx = RemainingExpr.find(',');
384 FileName = RemainingExpr.substr(0, ComaIdx).rtrim();
385 RemainingExpr = RemainingExpr.substr(ComaIdx).ltrim();
387 if (!RemainingExpr.startswith(","))
388 return std::make_pair(
389 unexpectedToken(RemainingExpr, Expr, "expected ','"), "");
390 RemainingExpr = RemainingExpr.substr(1).ltrim();
392 StringRef SectionName;
393 std::tie(SectionName, RemainingExpr) = parseSymbol(RemainingExpr);
395 if (!RemainingExpr.startswith(")"))
396 return std::make_pair(
397 unexpectedToken(RemainingExpr, Expr, "expected ')'"), "");
398 RemainingExpr = RemainingExpr.substr(1).ltrim();
401 std::string ErrorMsg = "";
402 std::tie(StubAddr, ErrorMsg) = Checker.getSectionAddr(
403 FileName, SectionName, PCtx.IsInsideLoad);
406 return std::make_pair(EvalResult(ErrorMsg), "");
408 return std::make_pair(EvalResult(StubAddr), RemainingExpr);
411 // Evaluate an identiefer expr, which may be a symbol, or a call to
412 // one of the builtin functions: get_insn_opcode or get_insn_length.
413 // Return the result, plus the expression remaining to be parsed.
414 std::pair<EvalResult, StringRef> evalIdentifierExpr(StringRef Expr,
415 ParseContext PCtx) const {
417 StringRef RemainingExpr;
418 std::tie(Symbol, RemainingExpr) = parseSymbol(Expr);
420 // Check for builtin function calls.
421 if (Symbol == "decode_operand")
422 return evalDecodeOperand(RemainingExpr);
423 else if (Symbol == "next_pc")
424 return evalNextPC(RemainingExpr, PCtx);
425 else if (Symbol == "stub_addr")
426 return evalStubAddr(RemainingExpr, PCtx);
427 else if (Symbol == "section_addr")
428 return evalSectionAddr(RemainingExpr, PCtx);
430 if (!Checker.isSymbolValid(Symbol)) {
431 std::string ErrMsg("No known address for symbol '");
434 if (Symbol.startswith("L"))
435 ErrMsg += " (this appears to be an assembler local label - "
436 " perhaps drop the 'L'?)";
438 return std::make_pair(EvalResult(ErrMsg), "");
441 // The value for the symbol depends on the context we're evaluating in:
442 // Inside a load this is the address in the linker's memory, outside a
443 // load it's the address in the target processes memory.
444 uint64_t Value = PCtx.IsInsideLoad ? Checker.getSymbolLinkerAddr(Symbol)
445 : Checker.getSymbolRemoteAddr(Symbol);
447 // Looks like a plain symbol reference.
448 return std::make_pair(EvalResult(Value), RemainingExpr);
451 // Parse a number (hexadecimal or decimal) and return a (string, string)
452 // pair representing the number and the expression remaining to be parsed.
453 std::pair<StringRef, StringRef> parseNumberString(StringRef Expr) const {
454 size_t FirstNonDigit = StringRef::npos;
455 if (Expr.startswith("0x")) {
456 FirstNonDigit = Expr.find_first_not_of("0123456789abcdefABCDEF", 2);
457 if (FirstNonDigit == StringRef::npos)
458 FirstNonDigit = Expr.size();
460 FirstNonDigit = Expr.find_first_not_of("0123456789");
461 if (FirstNonDigit == StringRef::npos)
462 FirstNonDigit = Expr.size();
464 return std::make_pair(Expr.substr(0, FirstNonDigit),
465 Expr.substr(FirstNonDigit));
468 // Evaluate a constant numeric expression (hexidecimal or decimal) and
469 // return a pair containing the result, and the expression remaining to be
471 std::pair<EvalResult, StringRef> evalNumberExpr(StringRef Expr) const {
473 StringRef RemainingExpr;
474 std::tie(ValueStr, RemainingExpr) = parseNumberString(Expr);
476 if (ValueStr.empty() || !isdigit(ValueStr[0]))
477 return std::make_pair(
478 unexpectedToken(RemainingExpr, RemainingExpr, "expected number"), "");
480 ValueStr.getAsInteger(0, Value);
481 return std::make_pair(EvalResult(Value), RemainingExpr);
484 // Evaluate an expression of the form "(<expr>)" and return a pair
485 // containing the result of evaluating <expr>, plus the expression
486 // remaining to be parsed.
487 std::pair<EvalResult, StringRef> evalParensExpr(StringRef Expr,
488 ParseContext PCtx) const {
489 assert(Expr.startswith("(") && "Not a parenthesized expression");
490 EvalResult SubExprResult;
491 StringRef RemainingExpr;
492 std::tie(SubExprResult, RemainingExpr) =
493 evalComplexExpr(evalSimpleExpr(Expr.substr(1).ltrim(), PCtx), PCtx);
494 if (SubExprResult.hasError())
495 return std::make_pair(SubExprResult, "");
496 if (!RemainingExpr.startswith(")"))
497 return std::make_pair(
498 unexpectedToken(RemainingExpr, Expr, "expected ')'"), "");
499 RemainingExpr = RemainingExpr.substr(1).ltrim();
500 return std::make_pair(SubExprResult, RemainingExpr);
503 // Evaluate an expression in one of the following forms:
505 // Return a pair containing the result, plus the expression remaining to be
507 std::pair<EvalResult, StringRef> evalLoadExpr(StringRef Expr) const {
508 assert(Expr.startswith("*") && "Not a load expression");
509 StringRef RemainingExpr = Expr.substr(1).ltrim();
512 if (!RemainingExpr.startswith("{"))
513 return std::make_pair(EvalResult("Expected '{' following '*'."), "");
514 RemainingExpr = RemainingExpr.substr(1).ltrim();
515 EvalResult ReadSizeExpr;
516 std::tie(ReadSizeExpr, RemainingExpr) = evalNumberExpr(RemainingExpr);
517 if (ReadSizeExpr.hasError())
518 return std::make_pair(ReadSizeExpr, RemainingExpr);
519 uint64_t ReadSize = ReadSizeExpr.getValue();
520 if (ReadSize < 1 || ReadSize > 8)
521 return std::make_pair(EvalResult("Invalid size for dereference."), "");
522 if (!RemainingExpr.startswith("}"))
523 return std::make_pair(EvalResult("Missing '}' for dereference."), "");
524 RemainingExpr = RemainingExpr.substr(1).ltrim();
526 // Evaluate the expression representing the load address.
527 ParseContext LoadCtx(true);
528 EvalResult LoadAddrExprResult;
529 std::tie(LoadAddrExprResult, RemainingExpr) =
530 evalComplexExpr(evalSimpleExpr(RemainingExpr, LoadCtx), LoadCtx);
532 if (LoadAddrExprResult.hasError())
533 return std::make_pair(LoadAddrExprResult, "");
535 uint64_t LoadAddr = LoadAddrExprResult.getValue();
537 return std::make_pair(
538 EvalResult(Checker.readMemoryAtAddr(LoadAddr, ReadSize)),
542 // Evaluate a "simple" expression. This is any expression that _isn't_ an
543 // un-parenthesized binary expression.
545 // "Simple" expressions can be optionally bit-sliced. See evalSlicedExpr.
547 // Returns a pair containing the result of the evaluation, plus the
548 // expression remaining to be parsed.
549 std::pair<EvalResult, StringRef> evalSimpleExpr(StringRef Expr,
550 ParseContext PCtx) const {
551 EvalResult SubExprResult;
552 StringRef RemainingExpr;
555 return std::make_pair(EvalResult("Unexpected end of expression"), "");
558 std::tie(SubExprResult, RemainingExpr) = evalParensExpr(Expr, PCtx);
559 else if (Expr[0] == '*')
560 std::tie(SubExprResult, RemainingExpr) = evalLoadExpr(Expr);
561 else if (isalpha(Expr[0]) || Expr[0] == '_')
562 std::tie(SubExprResult, RemainingExpr) = evalIdentifierExpr(Expr, PCtx);
563 else if (isdigit(Expr[0]))
564 std::tie(SubExprResult, RemainingExpr) = evalNumberExpr(Expr);
566 return std::make_pair(
567 unexpectedToken(Expr, Expr,
568 "expected '(', '*', identifier, or number"), "");
570 if (SubExprResult.hasError())
571 return std::make_pair(SubExprResult, RemainingExpr);
573 // Evaluate bit-slice if present.
574 if (RemainingExpr.startswith("["))
575 std::tie(SubExprResult, RemainingExpr) =
576 evalSliceExpr(std::make_pair(SubExprResult, RemainingExpr));
578 return std::make_pair(SubExprResult, RemainingExpr);
581 // Evaluate a bit-slice of an expression.
582 // A bit-slice has the form "<expr>[high:low]". The result of evaluating a
583 // slice is the bits between high and low (inclusive) in the original
584 // expression, right shifted so that the "low" bit is in position 0 in the
586 // Returns a pair containing the result of the slice operation, plus the
587 // expression remaining to be parsed.
588 std::pair<EvalResult, StringRef>
589 evalSliceExpr(std::pair<EvalResult, StringRef> Ctx) const {
590 EvalResult SubExprResult;
591 StringRef RemainingExpr;
592 std::tie(SubExprResult, RemainingExpr) = Ctx;
594 assert(RemainingExpr.startswith("[") && "Not a slice expr.");
595 RemainingExpr = RemainingExpr.substr(1).ltrim();
597 EvalResult HighBitExpr;
598 std::tie(HighBitExpr, RemainingExpr) = evalNumberExpr(RemainingExpr);
600 if (HighBitExpr.hasError())
601 return std::make_pair(HighBitExpr, RemainingExpr);
603 if (!RemainingExpr.startswith(":"))
604 return std::make_pair(
605 unexpectedToken(RemainingExpr, RemainingExpr, "expected ':'"), "");
606 RemainingExpr = RemainingExpr.substr(1).ltrim();
608 EvalResult LowBitExpr;
609 std::tie(LowBitExpr, RemainingExpr) = evalNumberExpr(RemainingExpr);
611 if (LowBitExpr.hasError())
612 return std::make_pair(LowBitExpr, RemainingExpr);
614 if (!RemainingExpr.startswith("]"))
615 return std::make_pair(
616 unexpectedToken(RemainingExpr, RemainingExpr, "expected ']'"), "");
617 RemainingExpr = RemainingExpr.substr(1).ltrim();
619 unsigned HighBit = HighBitExpr.getValue();
620 unsigned LowBit = LowBitExpr.getValue();
621 uint64_t Mask = ((uint64_t)1 << (HighBit - LowBit + 1)) - 1;
622 uint64_t SlicedValue = (SubExprResult.getValue() >> LowBit) & Mask;
623 return std::make_pair(EvalResult(SlicedValue), RemainingExpr);
626 // Evaluate a "complex" expression.
627 // Takes an already evaluated subexpression and checks for the presence of a
628 // binary operator, computing the result of the binary operation if one is
629 // found. Used to make arithmetic expressions left-associative.
630 // Returns a pair containing the ultimate result of evaluating the
631 // expression, plus the expression remaining to be evaluated.
632 std::pair<EvalResult, StringRef>
633 evalComplexExpr(std::pair<EvalResult, StringRef> LHSAndRemaining,
634 ParseContext PCtx) const {
635 EvalResult LHSResult;
636 StringRef RemainingExpr;
637 std::tie(LHSResult, RemainingExpr) = LHSAndRemaining;
639 // If there was an error, or there's nothing left to evaluate, return the
641 if (LHSResult.hasError() || RemainingExpr == "")
642 return std::make_pair(LHSResult, RemainingExpr);
644 // Otherwise check if this is a binary expressioan.
646 std::tie(BinOp, RemainingExpr) = parseBinOpToken(RemainingExpr);
648 // If this isn't a recognized expression just return.
649 if (BinOp == BinOpToken::Invalid)
650 return std::make_pair(LHSResult, RemainingExpr);
652 // This is a recognized bin-op. Evaluate the RHS, then evaluate the binop.
653 EvalResult RHSResult;
654 std::tie(RHSResult, RemainingExpr) = evalSimpleExpr(RemainingExpr, PCtx);
656 // If there was an error evaluating the RHS, return it.
657 if (RHSResult.hasError())
658 return std::make_pair(RHSResult, RemainingExpr);
660 // This is a binary expression - evaluate and try to continue as a
662 EvalResult ThisResult(computeBinOpResult(BinOp, LHSResult, RHSResult));
664 return evalComplexExpr(std::make_pair(ThisResult, RemainingExpr), PCtx);
667 bool decodeInst(StringRef Symbol, MCInst &Inst, uint64_t &Size) const {
668 MCDisassembler *Dis = Checker.Disassembler;
669 StringRef SectionMem = Checker.getSubsectionStartingAt(Symbol);
670 ArrayRef<uint8_t> SectionBytes(
671 reinterpret_cast<const uint8_t *>(SectionMem.data()),
674 MCDisassembler::DecodeStatus S =
675 Dis->getInstruction(Inst, Size, SectionBytes, 0, nulls(), nulls());
677 return (S == MCDisassembler::Success);
682 RuntimeDyldCheckerImpl::RuntimeDyldCheckerImpl(RuntimeDyld &RTDyld,
683 MCDisassembler *Disassembler,
684 MCInstPrinter *InstPrinter,
685 raw_ostream &ErrStream)
686 : RTDyld(RTDyld), Disassembler(Disassembler), InstPrinter(InstPrinter),
687 ErrStream(ErrStream) {
688 RTDyld.Checker = this;
691 bool RuntimeDyldCheckerImpl::check(StringRef CheckExpr) const {
692 CheckExpr = CheckExpr.trim();
693 DEBUG(dbgs() << "RuntimeDyldChecker: Checking '" << CheckExpr << "'...\n");
694 RuntimeDyldCheckerExprEval P(*this, ErrStream);
695 bool Result = P.evaluate(CheckExpr);
697 DEBUG(dbgs() << "RuntimeDyldChecker: '" << CheckExpr << "' "
698 << (Result ? "passed" : "FAILED") << ".\n");
702 bool RuntimeDyldCheckerImpl::checkAllRulesInBuffer(StringRef RulePrefix,
703 MemoryBuffer *MemBuf) const {
704 bool DidAllTestsPass = true;
705 unsigned NumRules = 0;
707 const char *LineStart = MemBuf->getBufferStart();
710 while (LineStart != MemBuf->getBufferEnd() && std::isspace(*LineStart))
713 while (LineStart != MemBuf->getBufferEnd() && *LineStart != '\0') {
714 const char *LineEnd = LineStart;
715 while (LineEnd != MemBuf->getBufferEnd() && *LineEnd != '\r' &&
719 StringRef Line(LineStart, LineEnd - LineStart);
720 if (Line.startswith(RulePrefix)) {
721 DidAllTestsPass &= check(Line.substr(RulePrefix.size()));
727 while (LineStart != MemBuf->getBufferEnd() && std::isspace(*LineStart))
730 return DidAllTestsPass && (NumRules != 0);
733 bool RuntimeDyldCheckerImpl::isSymbolValid(StringRef Symbol) const {
734 return getRTDyld().getSymbolAddress(Symbol) != nullptr;
737 uint64_t RuntimeDyldCheckerImpl::getSymbolLinkerAddr(StringRef Symbol) const {
738 return static_cast<uint64_t>(
739 reinterpret_cast<uintptr_t>(getRTDyld().getSymbolAddress(Symbol)));
742 uint64_t RuntimeDyldCheckerImpl::getSymbolRemoteAddr(StringRef Symbol) const {
743 return getRTDyld().getAnySymbolRemoteAddress(Symbol);
746 uint64_t RuntimeDyldCheckerImpl::readMemoryAtAddr(uint64_t SrcAddr,
747 unsigned Size) const {
748 uintptr_t PtrSizedAddr = static_cast<uintptr_t>(SrcAddr);
749 assert(PtrSizedAddr == SrcAddr && "Linker memory pointer out-of-range.");
750 uint8_t *Src = reinterpret_cast<uint8_t*>(PtrSizedAddr);
751 return getRTDyld().readBytesUnaligned(Src, Size);
755 std::pair<const RuntimeDyldCheckerImpl::SectionAddressInfo*, std::string>
756 RuntimeDyldCheckerImpl::findSectionAddrInfo(StringRef FileName,
757 StringRef SectionName) const {
759 auto SectionMapItr = Stubs.find(FileName);
760 if (SectionMapItr == Stubs.end()) {
761 std::string ErrorMsg = "File '";
762 ErrorMsg += FileName;
763 ErrorMsg += "' not found. ";
765 ErrorMsg += "No stubs registered.";
767 ErrorMsg += "Available files are:";
768 for (const auto& StubEntry : Stubs) {
770 ErrorMsg += StubEntry.first;
775 return std::make_pair(nullptr, ErrorMsg);
778 auto SectionInfoItr = SectionMapItr->second.find(SectionName);
779 if (SectionInfoItr == SectionMapItr->second.end())
780 return std::make_pair(nullptr,
781 ("Section '" + SectionName + "' not found in file '" +
782 FileName + "'\n").str());
784 return std::make_pair(&SectionInfoItr->second, std::string(""));
787 std::pair<uint64_t, std::string> RuntimeDyldCheckerImpl::getSectionAddr(
788 StringRef FileName, StringRef SectionName, bool IsInsideLoad) const {
790 const SectionAddressInfo *SectionInfo = nullptr;
792 std::string ErrorMsg;
793 std::tie(SectionInfo, ErrorMsg) =
794 findSectionAddrInfo(FileName, SectionName);
796 return std::make_pair(0, ErrorMsg);
799 unsigned SectionID = SectionInfo->SectionID;
803 static_cast<uint64_t>(
804 reinterpret_cast<uintptr_t>(getRTDyld().Sections[SectionID].Address));
806 Addr = getRTDyld().Sections[SectionID].LoadAddress;
808 return std::make_pair(Addr, std::string(""));
811 std::pair<uint64_t, std::string> RuntimeDyldCheckerImpl::getStubAddrFor(
812 StringRef FileName, StringRef SectionName, StringRef SymbolName,
813 bool IsInsideLoad) const {
815 const SectionAddressInfo *SectionInfo = nullptr;
817 std::string ErrorMsg;
818 std::tie(SectionInfo, ErrorMsg) =
819 findSectionAddrInfo(FileName, SectionName);
821 return std::make_pair(0, ErrorMsg);
824 unsigned SectionID = SectionInfo->SectionID;
825 const StubOffsetsMap &SymbolStubs = SectionInfo->StubOffsets;
826 auto StubOffsetItr = SymbolStubs.find(SymbolName);
827 if (StubOffsetItr == SymbolStubs.end())
828 return std::make_pair(0,
829 ("Stub for symbol '" + SymbolName + "' not found. "
830 "If '" + SymbolName + "' is an internal symbol this "
831 "may indicate that the stub target offset is being "
832 "computed incorrectly.\n").str());
834 uint64_t StubOffset = StubOffsetItr->second;
838 uintptr_t SectionBase =
839 reinterpret_cast<uintptr_t>(getRTDyld().Sections[SectionID].Address);
840 Addr = static_cast<uint64_t>(SectionBase) + StubOffset;
842 uint64_t SectionBase = getRTDyld().Sections[SectionID].LoadAddress;
843 Addr = SectionBase + StubOffset;
846 return std::make_pair(Addr, std::string(""));
850 RuntimeDyldCheckerImpl::getSubsectionStartingAt(StringRef Name) const {
851 RuntimeDyldImpl::SymbolTableMap::const_iterator pos =
852 getRTDyld().GlobalSymbolTable.find(Name);
853 if (pos == getRTDyld().GlobalSymbolTable.end())
855 RuntimeDyldImpl::SymbolLoc Loc = pos->second;
856 uint8_t *SectionAddr = getRTDyld().getSectionAddress(Loc.first);
857 return StringRef(reinterpret_cast<const char *>(SectionAddr) + Loc.second,
858 getRTDyld().Sections[Loc.first].Size - Loc.second);
861 void RuntimeDyldCheckerImpl::registerSection(
862 StringRef FilePath, unsigned SectionID) {
863 StringRef FileName = sys::path::filename(FilePath);
864 const SectionEntry &Section = getRTDyld().Sections[SectionID];
865 StringRef SectionName = Section.Name;
867 Stubs[FileName][SectionName].SectionID = SectionID;
870 void RuntimeDyldCheckerImpl::registerStubMap(
871 StringRef FilePath, unsigned SectionID,
872 const RuntimeDyldImpl::StubMap &RTDyldStubs) {
873 StringRef FileName = sys::path::filename(FilePath);
874 const SectionEntry &Section = getRTDyld().Sections[SectionID];
875 StringRef SectionName = Section.Name;
877 Stubs[FileName][SectionName].SectionID = SectionID;
879 for (auto &StubMapEntry : RTDyldStubs) {
880 std::string SymbolName = "";
882 if (StubMapEntry.first.SymbolName)
883 SymbolName = StubMapEntry.first.SymbolName;
885 // If this is a (Section, Offset) pair, do a reverse lookup in the
886 // global symbol table to find the name.
887 for (auto &GSTEntry : getRTDyld().GlobalSymbolTable) {
888 if (GSTEntry.second.first == StubMapEntry.first.SectionID &&
889 GSTEntry.second.second ==
890 static_cast<uint64_t>(StubMapEntry.first.Offset)) {
891 SymbolName = GSTEntry.first();
897 if (SymbolName != "")
898 Stubs[FileName][SectionName].StubOffsets[SymbolName] =
903 RuntimeDyldChecker::RuntimeDyldChecker(RuntimeDyld &RTDyld,
904 MCDisassembler *Disassembler,
905 MCInstPrinter *InstPrinter,
906 raw_ostream &ErrStream)
907 : Impl(make_unique<RuntimeDyldCheckerImpl>(RTDyld, Disassembler,
908 InstPrinter, ErrStream)) {}
910 RuntimeDyldChecker::~RuntimeDyldChecker() {}
912 RuntimeDyld& RuntimeDyldChecker::getRTDyld() {
916 const RuntimeDyld& RuntimeDyldChecker::getRTDyld() const {
920 bool RuntimeDyldChecker::check(StringRef CheckExpr) const {
921 return Impl->check(CheckExpr);
924 bool RuntimeDyldChecker::checkAllRulesInBuffer(StringRef RulePrefix,
925 MemoryBuffer *MemBuf) const {
926 return Impl->checkAllRulesInBuffer(RulePrefix, MemBuf);
929 std::pair<uint64_t, std::string>
930 RuntimeDyldChecker::getSectionAddr(StringRef FileName, StringRef SectionName,
931 bool LinkerAddress) {
932 return Impl->getSectionAddr(FileName, SectionName, LinkerAddress);