fix offset from header

[lttv.git] / ltt / branches / poly / ltt / tracefile.c

diff --git a/ltt/branches/poly/ltt/tracefile.c b/ltt/branches/poly/ltt/tracefile.c
index 1f7249da0733394b77cbec6ab876db6b1a7c6828..c9564bf444e8fa8540c72989a77f1f2f7179dce9 100644 (file)
--- a/ltt/branches/poly/ltt/tracefile.c
+++ b/ltt/branches/poly/ltt/tracefile.c
@@ -234,7 +234,9 @@ int parse_trace_header(void *header, LttTracefile *tf, LttTrace *t)
       {
         struct ltt_trace_header_0_3 *header_0_3 = 
                 (struct ltt_trace_header_0_3 *)header;
-
+        tf->buffer_header_size =
+         sizeof(struct ltt_block_start_header) 
+            + sizeof(struct ltt_trace_header_0_3);
       }
       break;
     default:
@@ -289,7 +291,9 @@ gint ltt_tracefile_open(LttTrace *t, gchar * fileName, LttTracefile *tf)
   }
 
   // Is the file large enough to contain a trace 
-  if(lTDFStat.st_size < (off_t)(sizeof(struct ltt_block_start_header))){
+  if(lTDFStat.st_size <
+      (off_t)(sizeof(struct ltt_block_start_header 
+                     + sizeof(ltt_trace_header_any)))){
     g_print("The input data file %s does not contain a trace\n", fileName);
     goto close_file;
   }
@@ -297,7 +301,8 @@ gint ltt_tracefile_open(LttTrace *t, gchar * fileName, LttTracefile *tf)
   /* Temporarily map the buffer start header to get trace information */
   /* Multiple of pages aligned head */
   tf->buffer.head = mmap(0,
-      PAGE_ALIGN(sizeof(struct ltt_block_start_header)), PROT_READ, 
+      PAGE_ALIGN(sizeof(struct ltt_block_start_header
+          + sizeof(struct ltt_trace_header_any))), PROT_READ, 
       MAP_PRIVATE, tf->fd, 0);
   if(tf->buffer.head == MAP_FAILED) {
     perror("Error in allocating memory for buffer of tracefile");
@@ -315,9 +320,11 @@ gint ltt_tracefile_open(LttTrace *t, gchar * fileName, LttTracefile *tf)
   tf->num_blocks = tf->file_size / tf->buf_size;
 
   if(munmap(tf->buffer.head,
-        PAGE_ALIGN(sizeof(struct ltt_block_start_header)))) {
+        PAGE_ALIGN(sizeof(struct ltt_block_start_header
+            + sizeof(struct ltt_trace_header_any))))) {
     g_warning("unmap size : %u\n",
-        PAGE_ALIGN(sizeof(struct ltt_block_start_header)));
+        PAGE_ALIGN(sizeof(struct ltt_block_start_header
+            + sizeof(struct ltt_trace_header_any))));
     perror("munmap error");
     g_assert(0);
   }
@@ -334,9 +341,11 @@ gint ltt_tracefile_open(LttTrace *t, gchar * fileName, LttTracefile *tf)
   /* Error */
 unmap_file:
   if(munmap(tf->buffer.head,
-        PAGE_ALIGN(sizeof(struct ltt_block_start_header)))) {
+        PAGE_ALIGN(sizeof(struct ltt_block_start_header
+            + sizeof(struct ltt_trace_header_any))))) {
     g_warning("unmap size : %u\n",
-        PAGE_ALIGN(sizeof(struct ltt_block_start_header)));
+        PAGE_ALIGN(sizeof(struct ltt_block_start_header
+            + sizeof(struct ltt_trace_header_any))));
     perror("munmap error");
     g_assert(0);
   }
@@ -1851,7 +1860,8 @@ static int ltt_seek_next_event(LttTracefile *tf)
   
   /* seek over the buffer header if we are at the buffer start */
   if(tf->event.offset == 0) {
-    tf->event.offset += sizeof(struct ltt_block_start_header);
+    tf->event.offset += sizeof(struct ltt_block_start_header 
+        + tf->buffer_header_size);
 
     if(tf->event.offset == tf->buf_size - tf->buffer.lost_size) {
       ret = ERANGE;