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[model-checker.git] / snapshot-interface.cc

diff --git a/snapshot-interface.cc b/snapshot-interface.cc
index 952d7906c984a75f32be66b45c11eed8ca105611..4def5c88c56d7baa2e1f44bec06c9680671a4779 100644 (file)
--- a/snapshot-interface.cc
+++ b/snapshot-interface.cc
@@ -1,105 +1,79 @@
-#define MYBINARYNAME "model"
-#define MYLIBRARYNAME "libmodel.so"
-#define MYALLOCNAME  "libmymemory.so"
-#define PROCNAME      "/proc/*/maps"
-#define REPLACEPOS             6
-#define PAGESIZE 4096
 #include "snapshot-interface.h"
+#include "snapshot.h"
 #include <iostream>
 #include <fstream>
 #include <unistd.h>
 #include <sys/types.h>
 #include <sstream>
 #include <cstring>
+#include <string>
 #include <cassert>
+#include <vector>
+#include <utility>
+#include <inttypes.h>
 
-/*This looks like it might leak memory...  Subramanian should fix this. */
+#include "common.h"
 
-typedef std::basic_stringstream< char, std::char_traits< char >, MyAlloc< char > > MyStringStream;
-std::vector< MyString, MyAlloc< MyString> > splitString( MyString input, char delim ){
-  std::vector< MyString, MyAlloc< MyString > > splits;
-  MyStringStream ss( input );  
-  MyString item;
-  while( std::getline( ss, item, delim ) ){
-    splits.push_back( item );  
-  }
-  return splits;
-}
+#define MYBINARYNAME "model"
+#define MYLIBRARYNAME "libmodel.so"
+#define MAPFILE_FORMAT "/proc/%d/maps"
+
+SnapshotStack * snapshotObject;
 
-bool checkPermissions( MyString permStr ){
-  return permStr.find("w") != MyString::npos;
-}
-static void takeSegmentSnapshot( const MyString & lineText ){
-  std::vector< MyString, MyAlloc< MyString > > firstSplit = splitString( lineText, ' ' );
-  if( checkPermissions( firstSplit[ 1 ] ) ){
-    std::vector< MyString, MyAlloc< MyString > > secondSplit = splitString( firstSplit[ 0 ], '-' );    
-    size_t val1 = 0, val2 = 0;
-    sscanf( secondSplit[ 0 ].c_str(), "%zx", &val1 );
-    sscanf( secondSplit[ 1 ].c_str(), "%zx", &val2 );
-    size_t len = ( val2 - val1 ) / PAGESIZE;    
-    if( 0 != len ){
-      addMemoryRegionToSnapShot( ( void * )val1, len );        
-    }
-  }
-}
 void SnapshotGlobalSegments(){
-  MyString fn = PROCNAME;
-  static char sProcessSize[ 12 ] = { 0 };
-  std::pair< const char *, bool > dataSect[ 3 ];
-  dataSect[ 0 ] = std::make_pair( MYBINARYNAME, false );
-  dataSect[ 1 ] = std::make_pair( MYLIBRARYNAME, false );
-  dataSect[ 2 ] = std::make_pair( MYALLOCNAME, false );
-  static pid_t sProcID = 0;
-  if( 0 == sProcID ) {
-    sProcID = getpid();        
-    sprintf( sProcessSize, "%d", sProcID );
-  }
-  fn.replace( REPLACEPOS, 1, sProcessSize );
-  std::ifstream procName( fn.c_str() );
-  if( procName.is_open() ){
-    MyString line;
-    while( procName.good() ){
-      getline( procName, line );
-      int i  = 0;
-      for( i = 0; i < 3; ++i ){
-       if( MyString::npos != line.find( dataSect[ i ].first ) ) break;                 
-      }
-      if( i >= 3 || dataSect[ i ].second == true ) continue;
-      dataSect[ i ].second = true;
-      if( !procName.good() )return;
-      getline( procName, line );
-      takeSegmentSnapshot( line );    
-    }  
-  }
+       int pid = getpid();
+       char buf[9000], filename[100];
+       FILE *map;
+
+       sprintf(filename, MAPFILE_FORMAT, pid);
+       map = fopen(filename, "r");
+       if (!map) {
+               perror("fopen");
+               exit(EXIT_FAILURE);
+       }
+       while (fgets(buf, sizeof(buf), map)) {
+               char regionname[200] = "";
+               char r, w, x, p;
+               void *begin, *end;
+
+               sscanf(buf, "%p-%p %c%c%c%c %*x %*x:%*x %*u %200s\n", &begin, &end, &r, &w, &x, &p, regionname);
+               if (w == 'w' && (strstr(regionname, MYBINARYNAME) || strstr(regionname, MYLIBRARYNAME))) {
+                       size_t len = ((uintptr_t)end - (uintptr_t)begin) / PAGESIZE;
+                       if (len != 0)
+                               addMemoryRegionToSnapShot(begin, len);
+                       DEBUG("%45s: %18p - %18p\t%c%c%c%c\n", regionname, begin, end, r, w, x, p);
+               }
+       }
+       fclose(map);
 }
 
-//class definition of snapshotStack.....
+//class definition of SnapshotStack.....
 //declaration of constructor....
-snapshotStack::snapshotStack(){
-  SnapshotGlobalSegments();
-  stack=NULL;
+SnapshotStack::SnapshotStack(){
+       SnapshotGlobalSegments();
+       stack=NULL;
 }
-       
-snapshotStack::~snapshotStack(){
+
+SnapshotStack::~SnapshotStack(){
 }
-       
-int snapshotStack::backTrackBeforeStep(int seqindex) {
-  while(true) {
-    if (stack->index<=seqindex) {
-      //have right entry
-      rollBack(stack->snapshotid);
-      return stack->index;
-    }
-    struct stackEntry *tmp=stack;
-    free(tmp);
-    stack=stack->next;
-  }
+
+int SnapshotStack::backTrackBeforeStep(int seqindex) {
+       while(true) {
+               if (stack->index<=seqindex) {
+                       //have right entry
+                       rollBack(stack->snapshotid);
+                       return stack->index;
+               }
+               struct stackEntry *tmp=stack;
+               MYFREE(tmp);
+               stack=stack->next;
+       }
 }
 
-void snapshotStack::snapshotStep(int seqindex) {
-  struct stackEntry *tmp=(struct stackEntry *)malloc(sizeof(struct stackEntry));
-  tmp->next=stack;
-  tmp->index=seqindex;
-  tmp->snapshotid=takeSnapshot();
-  stack=tmp;
+void SnapshotStack::snapshotStep(int seqindex) {
+       struct stackEntry *tmp=(struct stackEntry *)MYMALLOC(sizeof(struct stackEntry));
+       tmp->next=stack;
+       tmp->index=seqindex;
+       tmp->snapshotid=takeSnapshot();
+       stack=tmp;
 }