pdfviewer: debug code for crash

experimental/PdfViewer/pdfparser/native/SkPdfNativeTokenizer.cpp

 
 #include "SkPdfNativeTokenizer.h"
 #include "SkPdfObject.h"
 #include "SkPdfConfig.h"
 
 #include "SkPdfStreamCommonDictionary_autogen.h"
 #include "SkPdfImageDictionary_autogen.h"
 
 // TODO(edisonn): perf!!!
 // there could be 0s between start and end! but not in the needle.
@@ skipping 911 matching lines @@
         len = endobj - (char*)buffer + strlen("endobj");
     }
     fUncompressedStreamStart = fUncompressedStream = buffer;
     fUncompressedStreamEnd = fUncompressedStream + len;
 }
 
 SkPdfNativeTokenizer::~SkPdfNativeTokenizer() {
 }
 
 bool SkPdfNativeTokenizer::readTokenCore(PdfToken* token) {
+    SkPdfObject obj;
+#ifdef PDF_TRACE_READ_TOKEN
+    static int read_op = 0;
+    int last;
+#endif
     token->fKeyword = NULL;
     token->fObject = NULL;
 
     fUncompressedStream = skipPdfWhiteSpaces(0, fUncompressedStream, fUncompressedStreamEnd);
     if (fUncompressedStream >= fUncompressedStreamEnd) {
         return false;
     }
 
-    SkPdfObject obj;
+#ifdef PDF_TRACE_READ_TOKEN
+    printf("BEFORE the read: %i\n", read_op);
+    last = read_op;
+#endif
+
     fUncompressedStream = nextObject(0, fUncompressedStream, fUncompressedStreamEnd, &obj, fAllocator, fDoc);
+#ifdef PDF_TRACE_READ_TOKEN
+    printf("BEFORE the read: %i\n", read_op);
+    if (last != read_op) {
+        printf("break; // memory override");
+    }
+#endif
 
     // If it is a keyword, we will only get the pointer of the string
     if (obj.type() == SkPdfObject::kKeyword_PdfObjectType) {
         token->fKeyword = obj.c_str();
         token->fKeywordLength = obj.lenstr();
         token->fType = kKeyword_TokenType;
     } else {
         SkPdfObject* pobj = fAllocator->allocObject();
         *pobj = obj;
         token->fObject = pobj;
         token->fType = kObject_TokenType;
     }
 
 #ifdef PDF_TRACE_READ_TOKEN
-    static int read_op = 0;
     read_op++;
 #if 0
     if (548 == read_op) {
         printf("break;\n");
     }
 #endif
     printf("%i READ %s %s\n", read_op, token->fType == kKeyword_TokenType ? "Keyword" : "Object", token->fKeyword ? std::string(token->fKeyword, token->fKeywordLength).c_str() : token->fObject->toString().c_str());
 #endif
 
     return true;
@@ skipping 120 matching lines @@
             SkPdfObject* obj = fAllocator->allocObject();
             fUncompressedStream = nextObject(0, fUncompressedStream, fUncompressedStreamEnd, obj, fAllocator, fDoc);
             // TODO(edisonn): perf maybe we should not expand abreviation like this
             inlineImage->set(inlineImageKeyAbbreviationExpand(key),
                              inlineImageValueAbbreviationExpand(obj));
         }
     }
     // TODO(edisonn): report end of data with inline image without an EI
     return inlineImage;
 }