1 //===-- llvm/Support/GCOV.h - LLVM coverage tool ----------------*- 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 // This header provides the interface to read and write coverage files that
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_SUPPORT_GCOV_H
16 #define LLVM_SUPPORT_GCOV_H
18 #include "llvm/ADT/DenseMap.h"
19 #include "llvm/ADT/SmallVector.h"
20 #include "llvm/ADT/StringMap.h"
21 #include "llvm/Support/MemoryBuffer.h"
22 #include "llvm/Support/raw_ostream.h"
39 } // end GCOV namespace
41 /// GCOVBuffer - A wrapper around MemoryBuffer to provide GCOV specific
45 GCOVBuffer(MemoryBuffer *B) : Buffer(B), Cursor(0) {}
47 /// readGCOVFormat - Read GCOV signature at the beginning of buffer.
48 GCOV::GCOVFormat readGCOVFormat() {
49 StringRef Magic = Buffer->getBuffer().slice(0, 12);
51 if (Magic == "oncg*404MVLL")
52 return GCOV::GCNO_404;
53 else if (Magic == "oncg*204MVLL")
54 return GCOV::GCNO_402;
55 else if (Magic == "adcg*404MVLL")
56 return GCOV::GCDA_404;
57 else if (Magic == "adcg*204MVLL")
58 return GCOV::GCDA_402;
61 return GCOV::InvalidGCOV;
64 /// readFunctionTag - If cursor points to a function tag then increment the
65 /// cursor and return true otherwise return false.
66 bool readFunctionTag() {
67 StringRef Tag = Buffer->getBuffer().slice(Cursor, Cursor+4);
69 Tag[0] != '\0' || Tag[1] != '\0' ||
70 Tag[2] != '\0' || Tag[3] != '\1') {
77 /// readBlockTag - If cursor points to a block tag then increment the
78 /// cursor and return true otherwise return false.
80 StringRef Tag = Buffer->getBuffer().slice(Cursor, Cursor+4);
82 Tag[0] != '\0' || Tag[1] != '\0' ||
83 Tag[2] != '\x41' || Tag[3] != '\x01') {
90 /// readEdgeTag - If cursor points to an edge tag then increment the
91 /// cursor and return true otherwise return false.
93 StringRef Tag = Buffer->getBuffer().slice(Cursor, Cursor+4);
95 Tag[0] != '\0' || Tag[1] != '\0' ||
96 Tag[2] != '\x43' || Tag[3] != '\x01') {
103 /// readLineTag - If cursor points to a line tag then increment the
104 /// cursor and return true otherwise return false.
106 StringRef Tag = Buffer->getBuffer().slice(Cursor, Cursor+4);
108 Tag[0] != '\0' || Tag[1] != '\0' ||
109 Tag[2] != '\x45' || Tag[3] != '\x01') {
116 /// readArcTag - If cursor points to an gcda arc tag then increment the
117 /// cursor and return true otherwise return false.
119 StringRef Tag = Buffer->getBuffer().slice(Cursor, Cursor+4);
121 Tag[0] != '\0' || Tag[1] != '\0' ||
122 Tag[2] != '\xa1' || Tag[3] != '\1') {
129 /// readObjectTag - If cursor points to an object summary tag then increment
130 /// the cursor and return true otherwise return false.
131 bool readObjectTag() {
132 StringRef Tag = Buffer->getBuffer().slice(Cursor, Cursor+4);
134 Tag[0] != '\0' || Tag[1] != '\0' ||
135 Tag[2] != '\0' || Tag[3] != '\xa1') {
142 /// readProgramTag - If cursor points to a program summary tag then increment
143 /// the cursor and return true otherwise return false.
144 bool readProgramTag() {
145 StringRef Tag = Buffer->getBuffer().slice(Cursor, Cursor+4);
147 Tag[0] != '\0' || Tag[1] != '\0' ||
148 Tag[2] != '\0' || Tag[3] != '\xa3') {
155 bool readInt(uint32_t &Val) {
156 StringRef Str = Buffer->getBuffer().slice(Cursor, Cursor+4);
158 errs() << "Unexpected end of memory buffer: " << Cursor+4 << ".\n";
162 Val = *(const uint32_t *)(Str.data());
166 bool readInt64(uint64_t &Val) {
168 if (!readInt(Lo) || !readInt(Hi)) return false;
169 Val = ((uint64_t)Hi << 32) | Lo;
173 bool readString(StringRef &Str) {
175 if (!readInt(Len)) return false;
177 if (Buffer->getBuffer().size() < Cursor+Len) {
178 errs() << "Unexpected end of memory buffer: " << Cursor+Len << ".\n";
181 Str = Buffer->getBuffer().slice(Cursor, Cursor+Len).split('\0').first;
186 uint64_t getCursor() const { return Cursor; }
187 void advanceCursor(uint32_t n) { Cursor += n*4; }
189 MemoryBuffer *Buffer;
193 /// GCOVFile - Collects coverage information for one pair of coverage file
194 /// (.gcno and .gcda).
197 GCOVFile() : Functions(), RunCount(0), ProgramCount(0) {}
199 bool read(GCOVBuffer &Buffer);
201 void collectLineCounts(FileInfo &FI);
203 SmallVector<GCOVFunction *, 16> Functions;
205 uint32_t ProgramCount;
208 /// GCOVFunction - Collects function information.
211 GCOVFunction() : Ident(0), LineNumber(0) {}
213 bool read(GCOVBuffer &Buffer, GCOV::GCOVFormat Format);
215 void collectLineCounts(FileInfo &FI);
221 SmallVector<GCOVBlock *, 16> Blocks;
224 /// GCOVBlock - Collects block information.
227 GCOVBlock(uint32_t N) : Number(N), Counter(0) {}
229 void addEdge(uint32_t N) { Edges.push_back(N); }
230 void addLine(StringRef Filename, uint32_t LineNo);
231 void addCount(uint64_t N) { Counter += N; }
232 size_t getNumEdges() { return Edges.size(); }
234 void collectLineCounts(FileInfo &FI);
238 SmallVector<uint32_t, 16> Edges;
239 StringMap<GCOVLines *> Lines;
242 /// GCOVLines - A wrapper around a vector of int to keep track of line nos.
245 ~GCOVLines() { Lines.clear(); }
246 void add(uint32_t N) { Lines.push_back(N); }
247 void collectLineCounts(FileInfo &FI, StringRef Filename, uint64_t Count);
251 SmallVector<uint32_t, 4> Lines;
254 typedef DenseMap<uint32_t, uint64_t> LineCounts;
257 void addLineCount(StringRef Filename, uint32_t Line, uint64_t Count) {
258 LineInfo[Filename][Line-1] += Count;
260 void setRunCount(uint32_t Runs) { RunCount = Runs; }
261 void setProgramCount(uint32_t Programs) { ProgramCount = Programs; }
262 void print(raw_fd_ostream &OS, StringRef gcnoFile, StringRef gcdaFile);
264 StringMap<LineCounts> LineInfo;
266 uint32_t ProgramCount;