Process Statistics header, add max RSS to render_pdfs

tools/render_pdfs_main.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkCanvas.h"
 #include "SkCommandLineFlags.h"
 #include "SkDevice.h"
 #include "SkForceLinking.h"
 #include "SkGraphics.h"
 #include "SkImageEncoder.h"
 #include "SkOSFile.h"
 #include "SkPicture.h"
 #include "SkPixelRef.h"
 #include "SkStream.h"
 #include "SkTArray.h"
 #include "SkTSort.h"
 #include "PdfRenderer.h"
+#include "ProcStats.h"
 #include "picture_utils.h"
 
 __SK_FORCE_IMAGE_DECODER_LINKING;
 
 #ifdef SK_USE_CDB
 #include "win_dbghelp.h"
 #endif
 
 /**
  * render_pdfs
@@ skipping 181 matching lines @@
                     files.push_back(
                             SkOSPath::Join(input, inputFilename.c_str()));
                 }
             }
         } else {
             if (!SkCommandLineFlags::ShouldSkip(FLAGS_match, input)) {
                 files.push_back(SkString(input));
             }
         }
     }
-    SkTQSort<SkString>(files.begin(), files.end() - 1);
+    if (files.count() > 0) {
+        SkTQSort<SkString>(files.begin(), files.end() - 1);
+    }
     int failures = 0;
     for (int i = 0; i < files.count(); i ++) {
         if (!render_pdf(files[i], outputDir, renderer)) {
             ++failures;
         }
     }
     return failures;
 }
 
 int tool_main_core(int argc, char** argv);
 int tool_main_core(int argc, char** argv) {
     SkCommandLineFlags::Parse(argc, argv);
 
     SkAutoGraphics ag;
 
     SkAutoTUnref<sk_tools::PdfRenderer>
         renderer(SkNEW_ARGS(sk_tools::SimplePdfRenderer, (encode_to_dct_data)));
     SkASSERT(renderer.get());
 
     SkString outputDir;
     if (FLAGS_outputDir.count() > 0) {
         outputDir = FLAGS_outputDir[0];
     }
 
     int failures = process_input(FLAGS_inputPaths, outputDir, *renderer);
 
+    long max_rss_kb = sk_tools::getMaxResidentSetSizeKB();
+    if (max_rss_kb >= 0) {
+        SkDebugf("%4ldM peak ResidentSetSize\n", max_rss_kb / 1024);
+    }
+
     if (failures != 0) {
         SkDebugf("Failed to render %i PDFs.\n", failures);
         return 1;
     }
 
     return 0;
 }
 
 int tool_main(int argc, char** argv);
 int tool_main(int argc, char** argv) {
@@ skipping 10 matching lines @@
     }
 #endif
     return 0;
 }
 
 #if !defined SK_BUILD_FOR_IOS
 int main(int argc, char * const argv[]) {
     return tool_main(argc, (char**) argv);
 }
 #endif