Changeset 1aa6ecb for libcfa/src/heap.cfa

Timestamp:

Oct 20, 2019, 11:14:28 PM (5 years ago)

Author:

Peter A. Buhr <pabuhr@…>

Branches:

ADT, arm-eh, ast-experimental, enum, forall-pointer-decay, jacob/cs343-translation, jenkins-sandbox, master, new-ast, new-ast-unique-expr, pthread-emulation, qualifiedEnum

Children:

cafb687

Parents:

fdf4efb

Message:

check for maximum allocation and use macro to get header

File:

• libcfa/src/heap.cfa (modified) (6 diffs)

libcfa/src/heap.cfa

@@ -10 +10 @@
 // Created On       : Tue Dec 19 21:58:35 2017
 // Last Modified By : Peter A. Buhr
-// Last Modified On : Wed Jul 24 13:12:45 2019
-// Update Count     : 550
+// Last Modified On : Fri Oct 18 07:42:09 2019
+// Update Count     : 556
 //
 
@@ -541 +541 @@
         // along with the block and is a multiple of the alignment size.
 
+  if ( unlikely( size > ~0ul - sizeof(HeapManager.Storage) ) ) return 0;
         size_t tsize = size + sizeof(HeapManager.Storage);
         if ( likely( tsize < mmapStart ) ) {                            // small size => sbrk
@@ -592 +593 @@
                 block->header.kind.real.home = freeElem;                // pointer back to free list of apropriate size
         } else {                                                                                        // large size => mmap
+  if ( unlikely( size > ~0ul - pageSize ) ) return 0;
                 tsize = libCeiling( tsize, pageSize );                  // must be multiple of page size
                 #ifdef __STATISTICS__
@@ -888 +890 @@
         } // realloc
 
-
         // The obsolete function memalign() allocates size bytes and returns a pointer to the allocated memory. The memory
         // address will be a multiple of alignment, which must be a power of two.
@@ -992 +993 @@
         size_t malloc_alignment( void * addr ) {
           if ( unlikely( addr == 0 ) ) return libAlign();       // minimum alignment
-                HeapManager.Storage.Header * header = (HeapManager.Storage.Header *)( (char *)addr - sizeof(HeapManager.Storage) );
+                HeapManager.Storage.Header * header = headerAddr( addr );
                 if ( (header->kind.fake.alignment & 1) == 1 ) { // fake header ?
                         return header->kind.fake.alignment & -2;        // remove flag from value
@@ -1004 +1005 @@
         bool malloc_zero_fill( void * addr ) {
           if ( unlikely( addr == 0 ) ) return false;            // null allocation is not zero fill
-
-                HeapManager.Storage.Header * header = (HeapManager.Storage.Header *)( (char *)addr - sizeof(HeapManager.Storage) );
+                HeapManager.Storage.Header * header = headerAddr( addr );
                 if ( (header->kind.fake.alignment & 1) == 1 ) { // fake header ?
                         header = (HeapManager.Storage.Header *)((char *)header - header->kind.fake.offset);