Modify symbol supplier interface to support an overload that takes a symbol data buffer, to get around an extraneous read/write of symbol data

R=doshimun



git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@311 4c0a9323-5329-0410-9bdc-e9ce6186880e

src/google_breakpad/processor/basic_source_line_resolver.h

@@ -69,6 +69,12 @@ class BasicSourceLineResolver : public SourceLineResolverInterface {
   // retained until the BasicSourceLineResolver is destroyed.
   virtual bool LoadModule(const string &module_name, const string &map_file);
 
+  // Exactly the same as above, except the given map_buffer is used
+  // for symbols. 
+  virtual bool LoadModuleUsingMapBuffer(const string &module_name,
+                                        const string &map_buffer);
+
+
   virtual bool HasModule(const string &module_name) const;
 
   virtual StackFrameInfo* FillSourceLineInfo(StackFrame *frame) const;

src/google_breakpad/processor/source_line_resolver_interface.h

@@ -56,6 +56,9 @@ class SourceLineResolverInterface {
   // map_file should contain line/address mappings for this module.
   virtual bool LoadModule(const string &module_name,
                           const string &map_file) = 0;
+  // Same as above, but takes the contents of a pre-read map buffer
+  virtual bool LoadModuleUsingMapBuffer(const string &module_name,
+                                        const string &map_buffer) = 0;
 
   // Returns true if a module with the given name has been loaded.
   virtual bool HasModule(const string &module_name) const = 0;

src/google_breakpad/processor/symbol_supplier.h

@@ -59,12 +59,22 @@ class SymbolSupplier {
 
   // Retrieves the symbol file for the given CodeModule, placing the
   // path in symbol_file if successful.  system_info contains strings
-  // identifying the operating system and CPU; SymbolSupplier may use to help
-  // locate the symbol file.  system_info may be NULL or its fields may be
-  // empty if these values are unknown.
+  // identifying the operating system and CPU; SymbolSupplier may use
+  // to help locate the symbol file.  system_info may be NULL or its
+  // fields may be empty if these values are unknown.  symbol_file
+  // must be a pointer to a valid string
   virtual SymbolResult GetSymbolFile(const CodeModule *module,
                                      const SystemInfo *system_info,
                                      string *symbol_file) = 0;
+  // Same as above, except also places symbol data into symbol_data.
+  // If symbol_data is NULL, the data is not returned.  
+  // TODO(nealsid) Once we have symbol data caching behavior implemented
+  // investigate making all symbol suppliers implement all methods,
+  // and make this pure virtual
+  virtual SymbolResult GetSymbolFile(const CodeModule *module,
+                                     const SystemInfo *system_info,
+                                     string *symbol_file,
+                                     string *symbol_data) { assert(0); }
 };
 
 }  // namespace google_breakpad