btrace: store raw btrace data

[deliverable/binutils-gdb.git] / gdb / common / btrace-common.c

diff --git a/gdb/common/btrace-common.c b/gdb/common/btrace-common.c
index 676428e155eb9fda36d4738d9380bb11bb486b08..95193ebc08865c5e5f32f4a654b02a7de28871ff 100644 (file)
--- a/gdb/common/btrace-common.c
+++ b/gdb/common/btrace-common.c
@@ -91,3 +91,90 @@ btrace_data_empty (struct btrace_data *data)
 
   internal_error (__FILE__, __LINE__, _("Unkown branch trace format."));
 }
+
+/* See btrace-common.h.  */
+
+void
+btrace_data_clear (struct btrace_data *data)
+{
+  btrace_data_fini (data);
+  btrace_data_init (data);
+}
+
+/* See btrace-common.h.  */
+
+int
+btrace_data_append (struct btrace_data *dst,
+                   const struct btrace_data *src)
+{
+  switch (src->format)
+    {
+    case BTRACE_FORMAT_NONE:
+      return 0;
+
+    case BTRACE_FORMAT_BTS:
+      switch (dst->format)
+       {
+       default:
+         return -1;
+
+       case BTRACE_FORMAT_NONE:
+         dst->format = BTRACE_FORMAT_BTS;
+         dst->variant.bts.blocks = NULL;
+
+         /* Fall-through.  */
+       case BTRACE_FORMAT_BTS:
+         {
+           unsigned int blk;
+
+           /* We copy blocks in reverse order to have the oldest block at
+              index zero.  */
+           blk = VEC_length (btrace_block_s, src->variant.bts.blocks);
+           while (blk != 0)
+             {
+               btrace_block_s *block;
+
+               block = VEC_index (btrace_block_s, src->variant.bts.blocks,
+                                  --blk);
+
+               VEC_safe_push (btrace_block_s, dst->variant.bts.blocks, block);
+             }
+         }
+       }
+      return 0;
+
+    case BTRACE_FORMAT_PT:
+      switch (dst->format)
+       {
+       default:
+         return -1;
+
+       case BTRACE_FORMAT_NONE:
+         dst->format = BTRACE_FORMAT_PT;
+         dst->variant.pt.data = NULL;
+         dst->variant.pt.size = 0;
+
+         /* fall-through.  */
+       case BTRACE_FORMAT_BTS:
+         {
+           gdb_byte *data;
+           unsigned long size;
+
+           size = src->variant.pt.size + dst->variant.pt.size;
+           data = xmalloc (size);
+
+           memcpy (data, dst->variant.pt.data, dst->variant.pt.size);
+           memcpy (data + dst->variant.pt.size, src->variant.pt.data,
+                   src->variant.pt.size);
+
+           xfree (dst->variant.pt.data);
+
+           dst->variant.pt.data = data;
+           dst->variant.pt.size = size;
+         }
+       }
+      return 0;
+    }
+
+  internal_error (__FILE__, __LINE__, _("Unkown branch trace format."));
+}