Driver: Name crashdump scripts after the first temp file

In practice there's only ever one temporary output file when
generating a crashdump, but even if there were many iterating over
each and creating a duplicate run script for each one wouldn't make
very much sense.

This updates the behaviour to only generate the script once, based on
the first filename.

This should make it more reasonable to generate extra output files to
include in the crashdump going forward, so I've also added a FIXME to
look into doing just that with the extra module crashdump files.

llvm-svn: 220238

diff --git a/clang/lib/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp
index 8222640..30ae6ff 100644 (file)
--- a/clang/lib/Driver/Driver.cpp
+++ b/clang/lib/Driver/Driver.cpp
@@ -517,54 +517,66 @@ void Driver::generateCompilationDiagnostics(Compilation &C,
     return;
   }
 
+  const ArgStringList &TempFiles = C.getTempFiles();
+  if (TempFiles.empty()) {
+    Diag(clang::diag::note_drv_command_failed_diag_msg)
+      << "Error generating preprocessed source(s).";
+    return;
+  }
+
   Diag(clang::diag::note_drv_command_failed_diag_msg)
       << "\n********************\n\n"
          "PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:\n"
          "Preprocessed source(s) and associated run script(s) are located at:";
-  const ArgStringList &Files = C.getTempFiles();
-  for (ArgStringList::const_iterator it = Files.begin(), ie = Files.end();
-       it != ie; ++it) {
-    Diag(clang::diag::note_drv_command_failed_diag_msg) << *it;
-    std::string Script = StringRef(*it).rsplit('.').first;
-    // In some cases (modules) we'll dump extra data to help with reproducing
-    // the crash into a directory next to the output.
-    SmallString<128> VFS;
-    if (llvm::sys::fs::exists(Script + ".cache")) {
-      Diag(clang::diag::note_drv_command_failed_diag_msg) << Script + ".cache";
-      VFS = llvm::sys::path::filename(Script + ".cache");
-      llvm::sys::path::append(VFS, "vfs", "vfs.yaml");
-    }
 
-    std::error_code EC;
-    Script += ".sh";
-    llvm::raw_fd_ostream ScriptOS(Script, EC, llvm::sys::fs::F_Excl);
-    if (EC) {
-      Diag(clang::diag::note_drv_command_failed_diag_msg)
-          << "Error generating run script: " + Script + " " + EC.message();
-    } else {
-      // Replace the original filename with the preprocessed one.
-      size_t I, E;
-      I = Cmd.find("-main-file-name ");
-      assert(I != std::string::npos && "Expected to find -main-file-name");
-      I += 16;
-      E = Cmd.find(" ", I);
-      assert(E != std::string::npos && "-main-file-name missing argument?");
-      StringRef OldFilename = StringRef(Cmd).slice(I, E);
-      StringRef NewFilename = llvm::sys::path::filename(*it);
-      I = StringRef(Cmd).rfind(OldFilename);
-      E = I + OldFilename.size();
-      if (E + 1 < Cmd.size() && Cmd[E] == '"')
-        ++E; // Replace a trailing quote if present.
-      I = Cmd.rfind(" ", I) + 1;
-      Cmd.replace(I, E - I, NewFilename.data(), NewFilename.size());
-      if (!VFS.empty()) {
-        // Add the VFS overlay to the reproduction script.
-        I += NewFilename.size();
-        Cmd.insert(I, std::string(" -ivfsoverlay ") + VFS.c_str());
-      }
-      ScriptOS << Cmd;
-      Diag(clang::diag::note_drv_command_failed_diag_msg) << Script;
+  for (const char *TempFile : TempFiles)
+    Diag(clang::diag::note_drv_command_failed_diag_msg) << TempFile;
+
+  // Assume associated files are based off of the first temporary file.
+  const char *MainFile = TempFiles[0];
+
+  std::string Script = StringRef(MainFile).rsplit('.').first;
+
+  // In some cases (modules) we'll dump extra data to help with reproducing
+  // the crash into a directory next to the output.
+  // FIXME: We should be able to generate these as extra temp files now that it
+  // won't mess up the run script.
+  SmallString<128> VFS;
+  if (llvm::sys::fs::exists(Script + ".cache")) {
+    Diag(clang::diag::note_drv_command_failed_diag_msg) << Script + ".cache";
+    VFS = llvm::sys::path::filename(Script + ".cache");
+    llvm::sys::path::append(VFS, "vfs", "vfs.yaml");
+  }
+
+  std::error_code EC;
+  Script += ".sh";
+  llvm::raw_fd_ostream ScriptOS(Script, EC, llvm::sys::fs::F_Excl);
+  if (EC) {
+    Diag(clang::diag::note_drv_command_failed_diag_msg)
+        << "Error generating run script: " + Script + " " + EC.message();
+  } else {
+    // Replace the original filename with the preprocessed one.
+    size_t I, E;
+    I = Cmd.find("-main-file-name ");
+    assert(I != std::string::npos && "Expected to find -main-file-name");
+    I += 16;
+    E = Cmd.find(" ", I);
+    assert(E != std::string::npos && "-main-file-name missing argument?");
+    StringRef OldFilename = StringRef(Cmd).slice(I, E);
+    StringRef NewFilename = llvm::sys::path::filename(MainFile);
+    I = StringRef(Cmd).rfind(OldFilename);
+    E = I + OldFilename.size();
+    if (E + 1 < Cmd.size() && Cmd[E] == '"')
+      ++E; // Replace a trailing quote if present.
+    I = Cmd.rfind(" ", I) + 1;
+    Cmd.replace(I, E - I, NewFilename.data(), NewFilename.size());
+    if (!VFS.empty()) {
+      // Add the VFS overlay to the reproduction script.
+      I += NewFilename.size();
+      Cmd.insert(I, std::string(" -ivfsoverlay ") + VFS.c_str());
     }
+    ScriptOS << Cmd;
+    Diag(clang::diag::note_drv_command_failed_diag_msg) << Script;
   }
   Diag(clang::diag::note_drv_command_failed_diag_msg)
       << "\n\n********************";