[PATCH][v2] Make SIZE element for dwarf_block as size_t

[Siddhesh Poyarekar <siddhesh at redhat dot com>]

Hi,

This is version 2 of the patch I posted in the following thread:

http://sourceware.org/ml/gdb-patches/2012-07/msg00422.html

dwarf_block.SIZE should be size_t to accept larger data blocks in case
of DW_FORM_block, since the size of the length of a DW_FORM_block is
not specified and can be anything encoded in a uleb128. The
dwarf2_loclist_baton and dwarf2_locexpr_baton SIZE members also need to
be made size_t just to eliminate splint warnings.

I haven't been able to figure out a test case to reproduce this
problem, so I have stuck to ensuring that it does not cause a
regression in the testsuite. I have also done another pass through the
code to make sure that there are no other places that need fixing as a
result of this.

Regards,
Siddhesh

gdb/ChangeLog:

2012-07-25  Siddhesh Poyarekar  <siddhesh@redhat.com>

	* dwarf2loc.c (dwarf2_evaluate_loc_desc_full): Expand parameter
	SIZE to size_t.
	(dwarf2_evaluate_loc_desc): Likewise.
	(dwarf2_loc_desc_needs_frame): Likewise.
	(locexpr_describe_location_1): Likewise.
	* dwarf2loc.h (struct dwarf2_locexpr_baton): Make SIZE as
	size_t.
	(struct dwarf2_loclist_baton): Likewise.
	* dwarf2read.c (struct dwarf_block): Likewise.
	(dump_die_shallow): Use pulongest to print dwarf_block.size.
	(decode_locdesc): Expand SIZE and I to size_t.

diff --git a/gdb/dwarf2loc.c b/gdb/dwarf2loc.c
index 9b87dad..3eadc55 100644
--- a/gdb/dwarf2loc.c
+++ b/gdb/dwarf2loc.c
@@ -54,8 +54,8 @@ static const struct dwarf_expr_context_funcs dwarf_expr_ctx_funcs;
 static struct value *dwarf2_evaluate_loc_desc_full (struct type *type,
 						    struct frame_info *frame,
 						    const gdb_byte *data,
-						    unsigned short size,
-					      struct dwarf2_per_cu_data *per_cu,
+						    size_t size,
+						    struct dwarf2_per_cu_data *per_cu,
 						    LONGEST byte_offset);
 
 /* Until these have formal names, we define these here.
@@ -2112,7 +2112,7 @@ static const struct dwarf_expr_context_funcs dwarf_expr_ctx_funcs =
 
 static struct value *
 dwarf2_evaluate_loc_desc_full (struct type *type, struct frame_info *frame,
-			       const gdb_byte *data, unsigned short size,
+			       const gdb_byte *data, size_t size,
 			       struct dwarf2_per_cu_data *per_cu,
 			       LONGEST byte_offset)
 {
@@ -2313,7 +2313,7 @@ dwarf2_evaluate_loc_desc_full (struct type *type, struct frame_info *frame,
 
 struct value *
 dwarf2_evaluate_loc_desc (struct type *type, struct frame_info *frame,
-			  const gdb_byte *data, unsigned short size,
+			  const gdb_byte *data, size_t size,
 			  struct dwarf2_per_cu_data *per_cu)
 {
   return dwarf2_evaluate_loc_desc_full (type, frame, data, size, per_cu, 0);
@@ -2434,7 +2434,7 @@ static const struct dwarf_expr_context_funcs needs_frame_ctx_funcs =
    requires a frame to evaluate.  */
 
 static int
-dwarf2_loc_desc_needs_frame (const gdb_byte *data, unsigned short size,
+dwarf2_loc_desc_needs_frame (const gdb_byte *data, size_t size,
 			     struct dwarf2_per_cu_data *per_cu)
 {
   struct needs_frame_baton baton;
@@ -3828,7 +3828,7 @@ disassemble_dwarf_expression (struct ui_file *stream,
 static void
 locexpr_describe_location_1 (struct symbol *symbol, CORE_ADDR addr,
 			     struct ui_file *stream,
-			     const gdb_byte *data, int size,
+			     const gdb_byte *data, size_t size,
 			     struct objfile *objfile, unsigned int addr_size,
 			     int offset_size, struct dwarf2_per_cu_data *per_cu)
 {
diff --git a/gdb/dwarf2loc.h b/gdb/dwarf2loc.h
index e9d06a3..326838f 100644
--- a/gdb/dwarf2loc.h
+++ b/gdb/dwarf2loc.h
@@ -77,7 +77,7 @@ struct type *dwarf2_get_die_type (cu_offset die_offset,
 struct value *dwarf2_evaluate_loc_desc (struct type *type,
 					struct frame_info *frame,
 					const gdb_byte *data,
-					unsigned short size,
+					size_t size,
 					struct dwarf2_per_cu_data *per_cu);
 
 CORE_ADDR dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu,
@@ -97,7 +97,7 @@ struct dwarf2_locexpr_baton
 
   /* Length of the location expression.  For optimized out expressions it is
      zero.  */
-  unsigned long size;
+  size_t size;
 
   /* The compilation unit containing the symbol whose location
      we're computing.  */
@@ -114,7 +114,7 @@ struct dwarf2_loclist_baton
   const gdb_byte *data;
 
   /* Length of the location list.  */
-  unsigned long size;
+  size_t size;
 
   /* The compilation unit containing the symbol whose location
      we're computing.  */
diff --git a/gdb/dwarf2read.c b/gdb/dwarf2read.c
index 4b20098..99fef46 100644
--- a/gdb/dwarf2read.c
+++ b/gdb/dwarf2read.c
@@ -990,7 +990,7 @@ struct die_info
 /* Blocks are a bunch of untyped bytes.  */
 struct dwarf_block
   {
-    unsigned int size;
+    size_t size;
 
     /* Valid only if SIZE is not zero.  */
     gdb_byte *data;
@@ -16197,12 +16197,12 @@ dump_die_shallow (struct ui_file *f, int indent, struct die_info *die)
 	case DW_FORM_block4:
 	case DW_FORM_block:
 	case DW_FORM_block1:
-	  fprintf_unfiltered (f, "block: size %d",
-			      DW_BLOCK (&die->attrs[i])->size);
+	  fprintf_unfiltered (f, "block: size %s",
+			      pulongest (DW_BLOCK (&die->attrs[i])->size));
 	  break;
 	case DW_FORM_exprloc:
-	  fprintf_unfiltered (f, "expression: size %u",
-			      DW_BLOCK (&die->attrs[i])->size);
+	  fprintf_unfiltered (f, "expression: size %s",
+			      pulongest (DW_BLOCK (&die->attrs[i])->size));
 	  break;
 	case DW_FORM_ref_addr:
 	  fprintf_unfiltered (f, "ref address: ");
@@ -16746,8 +16746,8 @@ static CORE_ADDR
 decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
 {
   struct objfile *objfile = cu->objfile;
-  int i;
-  int size = blk->size;
+  size_t i;
+  size_t size = blk->size;
   gdb_byte *data = blk->data;
   CORE_ADDR stack[64];
   int stacki;