1 //===- GCOV.h - LLVM coverage tool ----------------------------------------===//
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/MapVector.h"
20 #include "llvm/ADT/SmallVector.h"
21 #include "llvm/ADT/StringMap.h"
22 #include "llvm/Support/MemoryBuffer.h"
23 #include "llvm/Support/raw_ostream.h"
32 enum GCOVVersion { V402, V404 };
33 } // end GCOV namespace
35 /// GCOVOptions - A struct for passing gcov options between functions.
37 GCOVOptions(bool A, bool B, bool C, bool F, bool P, bool U, bool L, bool N)
38 : AllBlocks(A), BranchInfo(B), BranchCount(C), FuncCoverage(F),
39 PreservePaths(P), UncondBranch(U), LongFileNames(L), NoOutput(N) {}
51 /// GCOVBuffer - A wrapper around MemoryBuffer to provide GCOV specific
55 GCOVBuffer(MemoryBuffer *B) : Buffer(B), Cursor(0) {}
57 /// readGCNOFormat - Check GCNO signature is valid at the beginning of buffer.
58 bool readGCNOFormat() {
59 StringRef File = Buffer->getBuffer().slice(0, 4);
61 errs() << "Unexpected file type: " << File << ".\n";
68 /// readGCDAFormat - Check GCDA signature is valid at the beginning of buffer.
69 bool readGCDAFormat() {
70 StringRef File = Buffer->getBuffer().slice(0, 4);
72 errs() << "Unexpected file type: " << File << ".\n";
79 /// readGCOVVersion - Read GCOV version.
80 bool readGCOVVersion(GCOV::GCOVVersion &Version) {
81 StringRef VersionStr = Buffer->getBuffer().slice(Cursor, Cursor + 4);
82 if (VersionStr == "*204") {
87 if (VersionStr == "*404") {
92 errs() << "Unexpected version: " << VersionStr << ".\n";
96 /// readFunctionTag - If cursor points to a function tag then increment the
97 /// cursor and return true otherwise return false.
98 bool readFunctionTag() {
99 StringRef Tag = Buffer->getBuffer().slice(Cursor, Cursor + 4);
100 if (Tag.empty() || Tag[0] != '\0' || Tag[1] != '\0' || Tag[2] != '\0' ||
108 /// readBlockTag - If cursor points to a block tag then increment the
109 /// cursor and return true otherwise return false.
110 bool readBlockTag() {
111 StringRef Tag = Buffer->getBuffer().slice(Cursor, Cursor + 4);
112 if (Tag.empty() || Tag[0] != '\0' || Tag[1] != '\0' || Tag[2] != '\x41' ||
120 /// readEdgeTag - If cursor points to an edge tag then increment the
121 /// cursor and return true otherwise return false.
123 StringRef Tag = Buffer->getBuffer().slice(Cursor, Cursor + 4);
124 if (Tag.empty() || Tag[0] != '\0' || Tag[1] != '\0' || Tag[2] != '\x43' ||
132 /// readLineTag - If cursor points to a line tag then increment the
133 /// cursor and return true otherwise return false.
135 StringRef Tag = Buffer->getBuffer().slice(Cursor, Cursor + 4);
136 if (Tag.empty() || Tag[0] != '\0' || Tag[1] != '\0' || Tag[2] != '\x45' ||
144 /// readArcTag - If cursor points to an gcda arc tag then increment the
145 /// cursor and return true otherwise return false.
147 StringRef Tag = Buffer->getBuffer().slice(Cursor, Cursor + 4);
148 if (Tag.empty() || Tag[0] != '\0' || Tag[1] != '\0' || Tag[2] != '\xa1' ||
156 /// readObjectTag - If cursor points to an object summary tag then increment
157 /// the cursor and return true otherwise return false.
158 bool readObjectTag() {
159 StringRef Tag = Buffer->getBuffer().slice(Cursor, Cursor + 4);
160 if (Tag.empty() || Tag[0] != '\0' || Tag[1] != '\0' || Tag[2] != '\0' ||
168 /// readProgramTag - If cursor points to a program summary tag then increment
169 /// the cursor and return true otherwise return false.
170 bool readProgramTag() {
171 StringRef Tag = Buffer->getBuffer().slice(Cursor, Cursor + 4);
172 if (Tag.empty() || Tag[0] != '\0' || Tag[1] != '\0' || Tag[2] != '\0' ||
180 bool readInt(uint32_t &Val) {
181 if (Buffer->getBuffer().size() < Cursor + 4) {
182 errs() << "Unexpected end of memory buffer: " << Cursor + 4 << ".\n";
185 StringRef Str = Buffer->getBuffer().slice(Cursor, Cursor + 4);
187 Val = *(const uint32_t *)(Str.data());
191 bool readInt64(uint64_t &Val) {
193 if (!readInt(Lo) || !readInt(Hi))
195 Val = ((uint64_t)Hi << 32) | Lo;
199 bool readString(StringRef &Str) {
201 // Keep reading until we find a non-zero length. This emulates gcov's
202 // behaviour, which appears to do the same.
207 if (Buffer->getBuffer().size() < Cursor + Len) {
208 errs() << "Unexpected end of memory buffer: " << Cursor + Len << ".\n";
211 Str = Buffer->getBuffer().slice(Cursor, Cursor + Len).split('\0').first;
216 uint64_t getCursor() const { return Cursor; }
217 void advanceCursor(uint32_t n) { Cursor += n * 4; }
220 MemoryBuffer *Buffer;
224 /// GCOVFile - Collects coverage information for one pair of coverage file
225 /// (.gcno and .gcda).
229 : GCNOInitialized(false), Checksum(0), Functions(), RunCount(0),
231 bool readGCNO(GCOVBuffer &Buffer);
232 bool readGCDA(GCOVBuffer &Buffer);
233 uint32_t getChecksum() const { return Checksum; }
235 void collectLineCounts(FileInfo &FI);
238 bool GCNOInitialized;
239 GCOV::GCOVVersion Version;
241 SmallVector<std::unique_ptr<GCOVFunction>, 16> Functions;
243 uint32_t ProgramCount;
246 /// GCOVEdge - Collects edge information.
248 GCOVEdge(GCOVBlock &S, GCOVBlock &D) : Src(S), Dst(D), Count(0) {}
255 /// GCOVFunction - Collects function information.
258 typedef SmallVectorImpl<std::unique_ptr<GCOVBlock>>::const_iterator
261 GCOVFunction(GCOVFile &P) : Parent(P), Ident(0), LineNumber(0) {}
262 bool readGCNO(GCOVBuffer &Buffer, GCOV::GCOVVersion Version);
263 bool readGCDA(GCOVBuffer &Buffer, GCOV::GCOVVersion Version);
264 StringRef getName() const { return Name; }
265 StringRef getFilename() const { return Filename; }
266 size_t getNumBlocks() const { return Blocks.size(); }
267 uint64_t getEntryCount() const;
268 uint64_t getExitCount() const;
270 BlockIterator block_begin() const { return Blocks.begin(); }
271 BlockIterator block_end() const { return Blocks.end(); }
274 void collectLineCounts(FileInfo &FI);
283 SmallVector<std::unique_ptr<GCOVBlock>, 16> Blocks;
284 SmallVector<std::unique_ptr<GCOVEdge>, 16> Edges;
287 /// GCOVBlock - Collects block information.
290 EdgeWeight(GCOVBlock *D) : Dst(D), Count(0) {}
296 struct SortDstEdgesFunctor {
297 bool operator()(const GCOVEdge *E1, const GCOVEdge *E2) {
298 return E1->Dst.Number < E2->Dst.Number;
303 typedef SmallVectorImpl<GCOVEdge *>::const_iterator EdgeIterator;
305 GCOVBlock(GCOVFunction &P, uint32_t N)
306 : Parent(P), Number(N), Counter(0), DstEdgesAreSorted(true), SrcEdges(),
307 DstEdges(), Lines() {}
309 const GCOVFunction &getParent() const { return Parent; }
310 void addLine(uint32_t N) { Lines.push_back(N); }
311 uint32_t getLastLine() const { return Lines.back(); }
312 void addCount(size_t DstEdgeNo, uint64_t N);
313 uint64_t getCount() const { return Counter; }
315 void addSrcEdge(GCOVEdge *Edge) {
316 assert(&Edge->Dst == this); // up to caller to ensure edge is valid
317 SrcEdges.push_back(Edge);
319 void addDstEdge(GCOVEdge *Edge) {
320 assert(&Edge->Src == this); // up to caller to ensure edge is valid
321 // Check if adding this edge causes list to become unsorted.
322 if (DstEdges.size() && DstEdges.back()->Dst.Number > Edge->Dst.Number)
323 DstEdgesAreSorted = false;
324 DstEdges.push_back(Edge);
326 size_t getNumSrcEdges() const { return SrcEdges.size(); }
327 size_t getNumDstEdges() const { return DstEdges.size(); }
330 EdgeIterator src_begin() const { return SrcEdges.begin(); }
331 EdgeIterator src_end() const { return SrcEdges.end(); }
332 EdgeIterator dst_begin() const { return DstEdges.begin(); }
333 EdgeIterator dst_end() const { return DstEdges.end(); }
336 void collectLineCounts(FileInfo &FI);
339 GCOVFunction &Parent;
342 bool DstEdgesAreSorted;
343 SmallVector<GCOVEdge *, 16> SrcEdges;
344 SmallVector<GCOVEdge *, 16> DstEdges;
345 SmallVector<uint32_t, 16> Lines;
349 // It is unlikely--but possible--for multiple functions to be on the same
351 // Therefore this typedef allows LineData.Functions to store multiple
353 // per instance. This is rare, however, so optimize for the common case.
354 typedef SmallVector<const GCOVFunction *, 1> FunctionVector;
355 typedef DenseMap<uint32_t, FunctionVector> FunctionLines;
356 typedef SmallVector<const GCOVBlock *, 4> BlockVector;
357 typedef DenseMap<uint32_t, BlockVector> BlockLines;
360 LineData() : LastLine(0) {}
362 FunctionLines Functions;
366 struct GCOVCoverage {
367 GCOVCoverage(StringRef Name)
368 : Name(Name), LogicalLines(0), LinesExec(0), Branches(0),
369 BranchesExec(0), BranchesTaken(0) {}
373 uint32_t LogicalLines;
377 uint32_t BranchesExec;
378 uint32_t BranchesTaken;
382 FileInfo(const GCOVOptions &Options)
383 : Options(Options), LineInfo(), RunCount(0), ProgramCount(0) {}
385 void addBlockLine(StringRef Filename, uint32_t Line, const GCOVBlock *Block) {
386 if (Line > LineInfo[Filename].LastLine)
387 LineInfo[Filename].LastLine = Line;
388 LineInfo[Filename].Blocks[Line - 1].push_back(Block);
390 void addFunctionLine(StringRef Filename, uint32_t Line,
391 const GCOVFunction *Function) {
392 if (Line > LineInfo[Filename].LastLine)
393 LineInfo[Filename].LastLine = Line;
394 LineInfo[Filename].Functions[Line - 1].push_back(Function);
396 void setRunCount(uint32_t Runs) { RunCount = Runs; }
397 void setProgramCount(uint32_t Programs) { ProgramCount = Programs; }
398 void print(StringRef MainFilename, StringRef GCNOFile, StringRef GCDAFile);
401 std::string getCoveragePath(StringRef Filename, StringRef MainFilename);
402 std::unique_ptr<raw_ostream> openCoveragePath(StringRef CoveragePath);
403 void printFunctionSummary(raw_ostream &OS, const FunctionVector &Funcs) const;
404 void printBlockInfo(raw_ostream &OS, const GCOVBlock &Block,
405 uint32_t LineIndex, uint32_t &BlockNo) const;
406 void printBranchInfo(raw_ostream &OS, const GCOVBlock &Block,
407 GCOVCoverage &Coverage, uint32_t &EdgeNo);
408 void printUncondBranchInfo(raw_ostream &OS, uint32_t &EdgeNo,
409 uint64_t Count) const;
411 void printCoverage(const GCOVCoverage &Coverage) const;
412 void printFuncCoverage() const;
413 void printFileCoverage() const;
415 const GCOVOptions &Options;
416 StringMap<LineData> LineInfo;
418 uint32_t ProgramCount;
420 typedef SmallVector<std::pair<std::string, GCOVCoverage>, 4> FileCoverageList;
421 typedef MapVector<const GCOVFunction *, GCOVCoverage> FuncCoverageMap;
423 FileCoverageList FileCoverages;
424 FuncCoverageMap FuncCoverages;