diff options
Diffstat (limited to 'contrib/llvm-project/clang/lib/Frontend/LayoutOverrideSource.cpp')
-rw-r--r-- | contrib/llvm-project/clang/lib/Frontend/LayoutOverrideSource.cpp | 107 |
1 files changed, 81 insertions, 26 deletions
diff --git a/contrib/llvm-project/clang/lib/Frontend/LayoutOverrideSource.cpp b/contrib/llvm-project/clang/lib/Frontend/LayoutOverrideSource.cpp index 76762d58fe25..a1866ec09c9d 100644 --- a/contrib/llvm-project/clang/lib/Frontend/LayoutOverrideSource.cpp +++ b/contrib/llvm-project/clang/lib/Frontend/LayoutOverrideSource.cpp @@ -7,6 +7,7 @@ //===----------------------------------------------------------------------===// #include "clang/Frontend/LayoutOverrideSource.h" #include "clang/AST/Decl.h" +#include "clang/AST/DeclCXX.h" #include "clang/Basic/CharInfo.h" #include "llvm/Support/raw_ostream.h" #include <fstream> @@ -16,16 +17,28 @@ using namespace clang; /// Parse a simple identifier. static std::string parseName(StringRef S) { - if (S.empty() || !isIdentifierHead(S[0])) + if (S.empty() || !isAsciiIdentifierStart(S[0])) return ""; unsigned Offset = 1; - while (Offset < S.size() && isIdentifierBody(S[Offset])) + while (Offset < S.size() && isAsciiIdentifierContinue(S[Offset])) ++Offset; return S.substr(0, Offset).str(); } +/// Parse an unsigned integer and move S to the next non-digit character. +static bool parseUnsigned(StringRef &S, unsigned long long &ULL) { + if (S.empty() || !isDigit(S[0])) + return false; + unsigned Idx = 1; + while (Idx < S.size() && isDigit(S[Idx])) + ++Idx; + (void)S.substr(0, Idx).getAsInteger(10, ULL); + S = S.substr(Idx); + return true; +} + LayoutOverrideSource::LayoutOverrideSource(StringRef Filename) { std::ifstream Input(Filename.str().c_str()); if (!Input.is_open()) @@ -43,7 +56,7 @@ LayoutOverrideSource::LayoutOverrideSource(StringRef Filename) { StringRef LineStr(Line); // Determine whether the following line will start a - if (LineStr.find("*** Dumping AST Record Layout") != StringRef::npos) { + if (LineStr.contains("*** Dumping AST Record Layout")) { // Flush the last type/layout, if there is one. if (!CurrentType.empty()) Layouts[CurrentType] = CurrentLayout; @@ -80,8 +93,8 @@ LayoutOverrideSource::LayoutOverrideSource(StringRef Filename) { LineStr = LineStr.substr(Pos + strlen(" Size:")); unsigned long long Size = 0; - (void)LineStr.getAsInteger(10, Size); - CurrentLayout.Size = Size; + if (parseUnsigned(LineStr, Size)) + CurrentLayout.Size = Size; continue; } @@ -92,12 +105,13 @@ LayoutOverrideSource::LayoutOverrideSource(StringRef Filename) { LineStr = LineStr.substr(Pos + strlen("Alignment:")); unsigned long long Alignment = 0; - (void)LineStr.getAsInteger(10, Alignment); - CurrentLayout.Align = Alignment; + if (parseUnsigned(LineStr, Alignment)) + CurrentLayout.Align = Alignment; continue; } - // Check for the size/alignment of the type. + // Check for the size/alignment of the type. The number follows "size=" or + // "align=" indicates number of bytes. Pos = LineStr.find("sizeof="); if (Pos != StringRef::npos) { /* Skip past the sizeof= prefix. */ @@ -105,8 +119,8 @@ LayoutOverrideSource::LayoutOverrideSource(StringRef Filename) { // Parse size. unsigned long long Size = 0; - (void)LineStr.getAsInteger(10, Size); - CurrentLayout.Size = Size; + if (parseUnsigned(LineStr, Size)) + CurrentLayout.Size = Size * 8; Pos = LineStr.find("align="); if (Pos != StringRef::npos) { @@ -115,8 +129,8 @@ LayoutOverrideSource::LayoutOverrideSource(StringRef Filename) { // Parse alignment. unsigned long long Alignment = 0; - (void)LineStr.getAsInteger(10, Alignment); - CurrentLayout.Align = Alignment; + if (parseUnsigned(LineStr, Alignment)) + CurrentLayout.Align = Alignment * 8; } continue; @@ -124,25 +138,48 @@ LayoutOverrideSource::LayoutOverrideSource(StringRef Filename) { // Check for the field offsets of the type. Pos = LineStr.find("FieldOffsets: ["); - if (Pos == StringRef::npos) - continue; + if (Pos != StringRef::npos) { + LineStr = LineStr.substr(Pos + strlen("FieldOffsets: [")); + while (!LineStr.empty() && isDigit(LineStr[0])) { + unsigned long long Offset = 0; + if (parseUnsigned(LineStr, Offset)) + CurrentLayout.FieldOffsets.push_back(Offset); - LineStr = LineStr.substr(Pos + strlen("FieldOffsets: [")); - while (!LineStr.empty() && isDigit(LineStr[0])) { - // Parse this offset. - unsigned Idx = 1; - while (Idx < LineStr.size() && isDigit(LineStr[Idx])) - ++Idx; + // Skip over this offset, the following comma, and any spaces. + LineStr = LineStr.substr(1); + LineStr = LineStr.drop_while(isWhitespace); + } + } - unsigned long long Offset = 0; - (void)LineStr.substr(0, Idx).getAsInteger(10, Offset); + // Check for the virtual base offsets. + Pos = LineStr.find("VBaseOffsets: ["); + if (Pos != StringRef::npos) { + LineStr = LineStr.substr(Pos + strlen("VBaseOffsets: [")); + while (!LineStr.empty() && isDigit(LineStr[0])) { + unsigned long long Offset = 0; + if (parseUnsigned(LineStr, Offset)) + CurrentLayout.VBaseOffsets.push_back(CharUnits::fromQuantity(Offset)); - CurrentLayout.FieldOffsets.push_back(Offset); + // Skip over this offset, the following comma, and any spaces. + LineStr = LineStr.substr(1); + LineStr = LineStr.drop_while(isWhitespace); + } + continue; + } - // Skip over this offset, the following comma, and any spaces. - LineStr = LineStr.substr(Idx + 1); - while (!LineStr.empty() && isWhitespace(LineStr[0])) + // Check for the base offsets. + Pos = LineStr.find("BaseOffsets: ["); + if (Pos != StringRef::npos) { + LineStr = LineStr.substr(Pos + strlen("BaseOffsets: [")); + while (!LineStr.empty() && isDigit(LineStr[0])) { + unsigned long long Offset = 0; + if (parseUnsigned(LineStr, Offset)) + CurrentLayout.BaseOffsets.push_back(CharUnits::fromQuantity(Offset)); + + // Skip over this offset, the following comma, and any spaces. LineStr = LineStr.substr(1); + LineStr = LineStr.drop_while(isWhitespace); + } } } @@ -182,6 +219,24 @@ LayoutOverrideSource::layoutRecordType(const RecordDecl *Record, if (NumFields != Known->second.FieldOffsets.size()) return false; + // Provide base offsets. + if (const auto *RD = dyn_cast<CXXRecordDecl>(Record)) { + unsigned NumNB = 0; + unsigned NumVB = 0; + for (const auto &I : RD->vbases()) { + if (NumVB >= Known->second.VBaseOffsets.size()) + continue; + const CXXRecordDecl *VBase = I.getType()->getAsCXXRecordDecl(); + VirtualBaseOffsets[VBase] = Known->second.VBaseOffsets[NumVB++]; + } + for (const auto &I : RD->bases()) { + if (I.isVirtual() || NumNB >= Known->second.BaseOffsets.size()) + continue; + const CXXRecordDecl *Base = I.getType()->getAsCXXRecordDecl(); + BaseOffsets[Base] = Known->second.BaseOffsets[NumNB++]; + } + } + Size = Known->second.Size; Alignment = Known->second.Align; return true; |