llvm-cov: Simplify CounterMappingRegion, pushing logic to its user

[oota-llvm.git] / tools / llvm-cov / llvm-cov.cpp

diff --git a/tools/llvm-cov/llvm-cov.cpp b/tools/llvm-cov/llvm-cov.cpp
index 18277737b6a9618637c6e31479fad4fe548f0c64..0a540b7a929f3e8a9940868a960efc9f3946fb31 100644 (file)
--- a/tools/llvm-cov/llvm-cov.cpp
+++ b/tools/llvm-cov/llvm-cov.cpp
@@ -1,4 +1,4 @@
-//===- tools/llvm-cov/llvm-cov.cpp - LLVM coverage tool -------------------===//
+//===- llvm-cov.cpp - LLVM coverage tool ----------------------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -11,88 +11,63 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/ADT/OwningPtr.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/GCOV.h"
-#include "llvm/Support/ManagedStatic.h"
-#include "llvm/Support/MemoryObject.h"
-#include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/ADT/StringRef.h"
 #include "llvm/Support/raw_ostream.h"
-#include "llvm/Support/Signals.h"
-#include "llvm/Support/system_error.h"
-#include <unistd.h>
-using namespace llvm;
-
-static cl::opt<bool>
-DumpGCOV("dump", cl::init(false), cl::desc("dump gcov file"));
+#include "llvm/Support/Path.h"
+#include <string>
 
-static cl::opt<std::string>
-InputGCNO("gcno", cl::desc("<input gcno file>"), cl::init(""));
+using namespace llvm;
 
-static cl::opt<std::string>
-InputGCDA("gcda", cl::desc("<input gcda file>"), cl::init(""));
+/// \brief The main entry point for the 'show' subcommand.
+int show_main(int argc, const char **argv);
 
-static cl::opt<std::string>
-OutputFile("o", cl::desc("<output llvm-cov file>"), cl::init("-"));
+/// \brief The main entry point for the 'report' subcommand.
+int report_main(int argc, const char **argv);
 
-static cl::opt<std::string>
-WorkingDir("C", cl::desc("change path of working directory"),
-           cl::init(""));
+/// \brief The main entry point for the 'convert-for-testing' subcommand.
+int convert_for_testing_main(int argc, const char **argv);
 
-//===----------------------------------------------------------------------===//
-int main(int argc, char **argv) {
-  // Print a stack trace if we signal out.
-  sys::PrintStackTraceOnErrorSignal();
-  PrettyStackTraceProgram X(argc, argv);
-  llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.
+/// \brief The main entry point for the gcov compatible coverage tool.
+int gcov_main(int argc, const char **argv);
 
-  cl::ParseCommandLineOptions(argc, argv, "llvm coverage tool\n");
+int main(int argc, const char **argv) {
+  // If argv[0] is or ends with 'gcov', always be gcov compatible
+  if (sys::path::stem(argv[0]).endswith_lower("gcov"))
+    return gcov_main(argc, argv);
 
-  if (!WorkingDir.empty()) {
-    if (chdir(WorkingDir.c_str()) == -1) {
-      errs() << "Cannot change to directory: " << WorkingDir << ".\n";
-      return 1;
-    }
-  }
+  // Check if we are invoking a specific tool command.
+  if (argc > 1) {
+    int (*func)(int, const char **) = nullptr;
 
-  std::string ErrorInfo;
-  raw_fd_ostream OS(OutputFile.c_str(), ErrorInfo);
-  if (!ErrorInfo.empty())
-    errs() << ErrorInfo << "\n";
+    StringRef command = argv[1];
+    if (command.equals_lower("show"))
+      func = show_main;
+    else if (command.equals_lower("report"))
+      func = report_main;
+    else if (command.equals_lower("convert-for-testing"))
+      func = convert_for_testing_main;
+    else if (command.equals_lower("gcov"))
+      func = gcov_main;
 
-  GCOVFile GF;
-  if (InputGCNO.empty())
-    errs() << " " << argv[0] << ": No gcov input file!\n";
-
-  OwningPtr<MemoryBuffer> GCNO_Buff;
-  if (error_code ec = MemoryBuffer::getFileOrSTDIN(InputGCNO, GCNO_Buff)) {
-    errs() << InputGCNO << ": " << ec.message() << "\n";
-    return 1;
-  }
-  GCOVBuffer GCNO_GB(GCNO_Buff.take());
-  if (!GF.read(GCNO_GB)) {
-    errs() << "Invalid .gcno File!\n";
-    return 1;
-  }
-
-  if (!InputGCDA.empty()) {
-    OwningPtr<MemoryBuffer> GCDA_Buff;
-    if (error_code ec = MemoryBuffer::getFileOrSTDIN(InputGCDA, GCDA_Buff)) {
-      errs() << InputGCDA << ": " << ec.message() << "\n";
-      return 1;
-    }
-    GCOVBuffer GCDA_GB(GCDA_Buff.take());
-    if (!GF.read(GCDA_GB)) {
-      errs() << "Invalid .gcda File!\n";
-      return 1;
+    if (func) {
+      std::string Invocation(std::string() + argv[0] + " " + argv[1]);
+      argv[1] = Invocation.c_str();
+      return func(argc - 1, argv + 1);
     }
   }
 
-  if (DumpGCOV)
-    GF.dump();
+  // Give a warning and fall back to gcov
+  errs().changeColor(raw_ostream::RED);
+  errs() << "warning:";
+  // Assume that argv[1] wasn't a command when it stats with a '-' or is a
+  // filename (i.e. contains a '.')
+  if (argc > 1 && !StringRef(argv[1]).startswith("-") &&
+      StringRef(argv[1]).find(".") == StringRef::npos)
+    errs() << " Unrecognized command '" << argv[1] << "'.";
+  errs() << " Using the gcov compatible mode "
+            "(this behaviour may be dropped in the future).";
+  errs().resetColor();
+  errs() << "\n";
 
-  FileInfo FI;
-  GF.collectLineCounts(FI);
-  FI.print(OS, InputGCNO, InputGCDA);
-  return 0;
+  return gcov_main(argc, argv);
 }