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

diff --git a/snapshot-interface.cc b/snapshot-interface.cc
index e350bc473c35fb48aff42ac4a42e912d4867ffb1..4def5c88c56d7baa2e1f44bec06c9680671a4779 100644 (file)
--- a/snapshot-interface.cc
+++ b/snapshot-interface.cc
@@ -1,65 +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>
-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 );       
+#include <cstring>
+#include <string>
+#include <cassert>
+#include <vector>
+#include <utility>
+#include <inttypes.h>
+
+#include "common.h"
+
+#define MYBINARYNAME "model"
+#define MYLIBRARYNAME "libmodel.so"
+#define MAPFILE_FORMAT "/proc/%d/maps"
+
+SnapshotStack * snapshotObject;
+
+void SnapshotGlobalSegments(){
+       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);
        }
-       return splits;
+       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);
 }
 
-bool checkPermissions( MyString permStr ){
-       return permStr.find("w") != MyString::npos;
+//class definition of SnapshotStack.....
+//declaration of constructor....
+SnapshotStack::SnapshotStack(){
+       SnapshotGlobalSegments();
+       stack=NULL;
 }
-std::vector< std::pair< void *, size_t >, MyAlloc< std::pair< void *, size_t > > > snapshot_utils::ReturnGlobalSegmentsToSnapshot(){
-       std::vector< std::pair< void *, size_t >, MyAlloc< std::pair< void *, size_t > > >  theVec;
-       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 theVec;
-                       getline( procName, line );
-                       std::vector< MyString, MyAlloc< MyString > > firstSplit = splitString( line, ' ' );
-                       if( !checkPermissions( firstSplit[ 1 ]  ) ) continue;
-                       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;
-                       theVec.push_back( std::make_pair( ( void * ) val1, len ) );
-               }       
+
+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;
+               MYFREE(tmp);
+               stack=stack->next;
        }
-       return theVec;
+}
+
+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;
 }