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authorrobot-piglet <robot-piglet@yandex-team.com>2025-03-05 13:38:11 +0300
committerrobot-piglet <robot-piglet@yandex-team.com>2025-03-05 13:49:53 +0300
commit9eed360f02de773a5ed2de5d2a3e81fc7f06acfa (patch)
tree744a4054e64eb443073c7c6ad36b29cedcf9c2e6 /contrib/libs/llvm14/lib/Object/COFFModuleDefinition.cpp
parentc141a5c40bda2eed1a68b0626ffdae5fd19359a6 (diff)
downloadydb-9eed360f02de773a5ed2de5d2a3e81fc7f06acfa.tar.gz
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commit_hash:2ec2671384dd8e604d41bc5c52c2f7858e4afea6
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-rw-r--r--contrib/libs/llvm14/lib/Object/COFFModuleDefinition.cpp363
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diff --git a/contrib/libs/llvm14/lib/Object/COFFModuleDefinition.cpp b/contrib/libs/llvm14/lib/Object/COFFModuleDefinition.cpp
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--- a/contrib/libs/llvm14/lib/Object/COFFModuleDefinition.cpp
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-//===--- COFFModuleDefinition.cpp - Simple DEF parser ---------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// Windows-specific.
-// A parser for the module-definition file (.def file).
-//
-// The format of module-definition files are described in this document:
-// https://msdn.microsoft.com/en-us/library/28d6s79h.aspx
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Object/COFFModuleDefinition.h"
-#include "llvm/ADT/StringRef.h"
-#include "llvm/ADT/StringSwitch.h"
-#include "llvm/Object/COFF.h"
-#include "llvm/Object/COFFImportFile.h"
-#include "llvm/Object/Error.h"
-#include "llvm/Support/Error.h"
-#include "llvm/Support/Path.h"
-#include "llvm/Support/raw_ostream.h"
-
-using namespace llvm::COFF;
-using namespace llvm;
-
-namespace llvm {
-namespace object {
-
-enum Kind {
- Unknown,
- Eof,
- Identifier,
- Comma,
- Equal,
- EqualEqual,
- KwBase,
- KwConstant,
- KwData,
- KwExports,
- KwHeapsize,
- KwLibrary,
- KwName,
- KwNoname,
- KwPrivate,
- KwStacksize,
- KwVersion,
-};
-
-struct Token {
- explicit Token(Kind T = Unknown, StringRef S = "") : K(T), Value(S) {}
- Kind K;
- StringRef Value;
-};
-
-static bool isDecorated(StringRef Sym, bool MingwDef) {
- // In def files, the symbols can either be listed decorated or undecorated.
- //
- // - For cdecl symbols, only the undecorated form is allowed.
- // - For fastcall and vectorcall symbols, both fully decorated or
- // undecorated forms can be present.
- // - For stdcall symbols in non-MinGW environments, the decorated form is
- // fully decorated with leading underscore and trailing stack argument
- // size - like "_Func@0".
- // - In MinGW def files, a decorated stdcall symbol does not include the
- // leading underscore though, like "Func@0".
-
- // This function controls whether a leading underscore should be added to
- // the given symbol name or not. For MinGW, treat a stdcall symbol name such
- // as "Func@0" as undecorated, i.e. a leading underscore must be added.
- // For non-MinGW, look for '@' in the whole string and consider "_Func@0"
- // as decorated, i.e. don't add any more leading underscores.
- // We can't check for a leading underscore here, since function names
- // themselves can start with an underscore, while a second one still needs
- // to be added.
- return Sym.startswith("@") || Sym.contains("@@") || Sym.startswith("?") ||
- (!MingwDef && Sym.contains('@'));
-}
-
-class Lexer {
-public:
- Lexer(StringRef S) : Buf(S) {}
-
- Token lex() {
- Buf = Buf.trim();
- if (Buf.empty())
- return Token(Eof);
-
- switch (Buf[0]) {
- case '\0':
- return Token(Eof);
- case ';': {
- size_t End = Buf.find('\n');
- Buf = (End == Buf.npos) ? "" : Buf.drop_front(End);
- return lex();
- }
- case '=':
- Buf = Buf.drop_front();
- if (Buf.startswith("=")) {
- Buf = Buf.drop_front();
- return Token(EqualEqual, "==");
- }
- return Token(Equal, "=");
- case ',':
- Buf = Buf.drop_front();
- return Token(Comma, ",");
- case '"': {
- StringRef S;
- std::tie(S, Buf) = Buf.substr(1).split('"');
- return Token(Identifier, S);
- }
- default: {
- size_t End = Buf.find_first_of("=,;\r\n \t\v");
- StringRef Word = Buf.substr(0, End);
- Kind K = llvm::StringSwitch<Kind>(Word)
- .Case("BASE", KwBase)
- .Case("CONSTANT", KwConstant)
- .Case("DATA", KwData)
- .Case("EXPORTS", KwExports)
- .Case("HEAPSIZE", KwHeapsize)
- .Case("LIBRARY", KwLibrary)
- .Case("NAME", KwName)
- .Case("NONAME", KwNoname)
- .Case("PRIVATE", KwPrivate)
- .Case("STACKSIZE", KwStacksize)
- .Case("VERSION", KwVersion)
- .Default(Identifier);
- Buf = (End == Buf.npos) ? "" : Buf.drop_front(End);
- return Token(K, Word);
- }
- }
- }
-
-private:
- StringRef Buf;
-};
-
-class Parser {
-public:
- explicit Parser(StringRef S, MachineTypes M, bool B)
- : Lex(S), Machine(M), MingwDef(B) {}
-
- Expected<COFFModuleDefinition> parse() {
- do {
- if (Error Err = parseOne())
- return std::move(Err);
- } while (Tok.K != Eof);
- return Info;
- }
-
-private:
- void read() {
- if (Stack.empty()) {
- Tok = Lex.lex();
- return;
- }
- Tok = Stack.back();
- Stack.pop_back();
- }
-
- Error readAsInt(uint64_t *I) {
- read();
- if (Tok.K != Identifier || Tok.Value.getAsInteger(10, *I))
- return createError("integer expected");
- return Error::success();
- }
-
- Error expect(Kind Expected, StringRef Msg) {
- read();
- if (Tok.K != Expected)
- return createError(Msg);
- return Error::success();
- }
-
- void unget() { Stack.push_back(Tok); }
-
- Error parseOne() {
- read();
- switch (Tok.K) {
- case Eof:
- return Error::success();
- case KwExports:
- for (;;) {
- read();
- if (Tok.K != Identifier) {
- unget();
- return Error::success();
- }
- if (Error Err = parseExport())
- return Err;
- }
- case KwHeapsize:
- return parseNumbers(&Info.HeapReserve, &Info.HeapCommit);
- case KwStacksize:
- return parseNumbers(&Info.StackReserve, &Info.StackCommit);
- case KwLibrary:
- case KwName: {
- bool IsDll = Tok.K == KwLibrary; // Check before parseName.
- std::string Name;
- if (Error Err = parseName(&Name, &Info.ImageBase))
- return Err;
-
- Info.ImportName = Name;
-
- // Set the output file, but don't override /out if it was already passed.
- if (Info.OutputFile.empty()) {
- Info.OutputFile = Name;
- // Append the appropriate file extension if not already present.
- if (!sys::path::has_extension(Name))
- Info.OutputFile += IsDll ? ".dll" : ".exe";
- }
-
- return Error::success();
- }
- case KwVersion:
- return parseVersion(&Info.MajorImageVersion, &Info.MinorImageVersion);
- default:
- return createError("unknown directive: " + Tok.Value);
- }
- }
-
- Error parseExport() {
- COFFShortExport E;
- E.Name = std::string(Tok.Value);
- read();
- if (Tok.K == Equal) {
- read();
- if (Tok.K != Identifier)
- return createError("identifier expected, but got " + Tok.Value);
- E.ExtName = E.Name;
- E.Name = std::string(Tok.Value);
- } else {
- unget();
- }
-
- if (Machine == IMAGE_FILE_MACHINE_I386) {
- if (!isDecorated(E.Name, MingwDef))
- E.Name = (std::string("_").append(E.Name));
- if (!E.ExtName.empty() && !isDecorated(E.ExtName, MingwDef))
- E.ExtName = (std::string("_").append(E.ExtName));
- }
-
- for (;;) {
- read();
- if (Tok.K == Identifier && Tok.Value[0] == '@') {
- if (Tok.Value == "@") {
- // "foo @ 10"
- read();
- Tok.Value.getAsInteger(10, E.Ordinal);
- } else if (Tok.Value.drop_front().getAsInteger(10, E.Ordinal)) {
- // "foo \n @bar" - Not an ordinal modifier at all, but the next
- // export (fastcall decorated) - complete the current one.
- unget();
- Info.Exports.push_back(E);
- return Error::success();
- }
- // "foo @10"
- read();
- if (Tok.K == KwNoname) {
- E.Noname = true;
- } else {
- unget();
- }
- continue;
- }
- if (Tok.K == KwData) {
- E.Data = true;
- continue;
- }
- if (Tok.K == KwConstant) {
- E.Constant = true;
- continue;
- }
- if (Tok.K == KwPrivate) {
- E.Private = true;
- continue;
- }
- if (Tok.K == EqualEqual) {
- read();
- E.AliasTarget = std::string(Tok.Value);
- if (Machine == IMAGE_FILE_MACHINE_I386 && !isDecorated(E.AliasTarget, MingwDef))
- E.AliasTarget = std::string("_").append(E.AliasTarget);
- continue;
- }
- unget();
- Info.Exports.push_back(E);
- return Error::success();
- }
- }
-
- // HEAPSIZE/STACKSIZE reserve[,commit]
- Error parseNumbers(uint64_t *Reserve, uint64_t *Commit) {
- if (Error Err = readAsInt(Reserve))
- return Err;
- read();
- if (Tok.K != Comma) {
- unget();
- Commit = nullptr;
- return Error::success();
- }
- if (Error Err = readAsInt(Commit))
- return Err;
- return Error::success();
- }
-
- // NAME outputPath [BASE=address]
- Error parseName(std::string *Out, uint64_t *Baseaddr) {
- read();
- if (Tok.K == Identifier) {
- *Out = std::string(Tok.Value);
- } else {
- *Out = "";
- unget();
- return Error::success();
- }
- read();
- if (Tok.K == KwBase) {
- if (Error Err = expect(Equal, "'=' expected"))
- return Err;
- if (Error Err = readAsInt(Baseaddr))
- return Err;
- } else {
- unget();
- *Baseaddr = 0;
- }
- return Error::success();
- }
-
- // VERSION major[.minor]
- Error parseVersion(uint32_t *Major, uint32_t *Minor) {
- read();
- if (Tok.K != Identifier)
- return createError("identifier expected, but got " + Tok.Value);
- StringRef V1, V2;
- std::tie(V1, V2) = Tok.Value.split('.');
- if (V1.getAsInteger(10, *Major))
- return createError("integer expected, but got " + Tok.Value);
- if (V2.empty())
- *Minor = 0;
- else if (V2.getAsInteger(10, *Minor))
- return createError("integer expected, but got " + Tok.Value);
- return Error::success();
- }
-
- Lexer Lex;
- Token Tok;
- std::vector<Token> Stack;
- MachineTypes Machine;
- COFFModuleDefinition Info;
- bool MingwDef;
-};
-
-Expected<COFFModuleDefinition> parseCOFFModuleDefinition(MemoryBufferRef MB,
- MachineTypes Machine,
- bool MingwDef) {
- return Parser(MB.getBuffer(), Machine, MingwDef).parse();
-}
-
-} // namespace object
-} // namespace llvm