Add dwarf2_per_objfile parameters to dwarf2_fetch_* functions

This allows removing dwarf2_per_cu_data references.

gdb/ChangeLog:

	* dwarf2/read.h (dwarf2_fetch_die_loc_sect_off,
	dwarf2_fetch_die_loc_cu_off, dwarf2_fetch_constant_bytes,
	dwarf2_fetch_die_type_sect_off): Add dwarf2_per_objfile
	parameter.
	* dwarf2/read.c (dwarf2_fetch_die_loc_sect_off,
	dwarf2_fetch_die_loc_cu_off, dwarf2_fetch_constant_bytes,
	dwarf2_fetch_die_type_sect_off): Add dwarf2_per_objfile
	parameter.
	* dwarf2/loc.c (indirect_synthetic_pointer, per_cu_dwarf_call,
	sect_variable_value): Add dwarf2_per_objfile parameter.
	(class dwarf_evaluate_loc_desc) <dwarf_call,
	dwarf_variable_value>: Update.
	(fetch_const_value_from_synthetic_pointer): Add
	dwarf2_per_objfile parameter.
	(fetch_const_value_from_synthetic_pointer): Update.
	(coerced_pieced_ref): Update.
	(class symbol_needs_eval_context) <dwarf_call,
	dwarf_variable_value>: Update.
	(dwarf2_compile_expr_to_ax): Update.

Change-Id: I07cf1806380633d0572304cea049a1fa5e9ea67f

4 files changed, 65 insertions, 27 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index fc965a4..cf21973 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,27 @@
 2020-05-27  Simon Marchi  <simon.marchi@efficios.com>
 
+	* dwarf2/read.h (dwarf2_fetch_die_loc_sect_off,
+	dwarf2_fetch_die_loc_cu_off, dwarf2_fetch_constant_bytes,
+	dwarf2_fetch_die_type_sect_off): Add dwarf2_per_objfile
+	parameter.
+	* dwarf2/read.c (dwarf2_fetch_die_loc_sect_off,
+	dwarf2_fetch_die_loc_cu_off, dwarf2_fetch_constant_bytes,
+	dwarf2_fetch_die_type_sect_off): Add dwarf2_per_objfile
+	parameter.
+	* dwarf2/loc.c (indirect_synthetic_pointer, per_cu_dwarf_call,
+	sect_variable_value): Add dwarf2_per_objfile parameter.
+	(class dwarf_evaluate_loc_desc) <dwarf_call,
+	dwarf_variable_value>: Update.
+	(fetch_const_value_from_synthetic_pointer): Add
+	dwarf2_per_objfile parameter.
+	(fetch_const_value_from_synthetic_pointer): Update.
+	(coerced_pieced_ref): Update.
+	(class symbol_needs_eval_context) <dwarf_call,
+	dwarf_variable_value>: Update.
+	(dwarf2_compile_expr_to_ax): Update.
+
+2020-05-27  Simon Marchi  <simon.marchi@efficios.com>
+
 	* dwarf2/loc.c (allocate_piece_closure): Add dwarf2_per_objfile
 	parameter.
 	(dwarf2_evaluate_loc_desc_full): Update.
diff --git a/gdb/dwarf2/loc.c b/gdb/dwarf2/loc.c
index 99a3a53..0d6e8ab 100644
--- a/gdb/dwarf2/loc.c
+++ b/gdb/dwarf2/loc.c
@@ -63,7 +63,8 @@ static struct call_site_parameter *dwarf_expr_reg_to_entry_parameter
 
 static struct value *indirect_synthetic_pointer
   (sect_offset die, LONGEST byte_offset,
-   struct dwarf2_per_cu_data *per_cu,
+   dwarf2_per_cu_data *per_cu,
+   dwarf2_per_objfile *per_objfile,
    struct frame_info *frame,
    struct type *type, bool resolve_abstract_p = false);
 
@@ -581,11 +582,11 @@ get_frame_pc_for_per_cu_dwarf_call (void *baton)
 
 static void
 per_cu_dwarf_call (struct dwarf_expr_context *ctx, cu_offset die_offset,
-		   struct dwarf2_per_cu_data *per_cu)
+		   dwarf2_per_cu_data *per_cu, dwarf2_per_objfile *per_objfile)
 {
   struct dwarf2_locexpr_baton block;
 
-  block = dwarf2_fetch_die_loc_cu_off (die_offset, per_cu,
+  block = dwarf2_fetch_die_loc_cu_off (die_offset, per_cu, per_objfile,
 				       get_frame_pc_for_per_cu_dwarf_call,
 				       ctx);
 
@@ -601,9 +602,11 @@ per_cu_dwarf_call (struct dwarf_expr_context *ctx, cu_offset die_offset,
 
 static struct value *
 sect_variable_value (struct dwarf_expr_context *ctx, sect_offset sect_off,
-		     struct dwarf2_per_cu_data *per_cu)
+		     dwarf2_per_cu_data *per_cu,
+		     dwarf2_per_objfile *per_objfile)
 {
-  struct type *die_type = dwarf2_fetch_die_type_sect_off (sect_off, per_cu);
+  struct type *die_type
+    = dwarf2_fetch_die_type_sect_off (sect_off, per_cu, per_objfile);
 
   if (die_type == NULL)
     error (_("Bad DW_OP_GNU_variable_value DIE."));
@@ -616,7 +619,8 @@ sect_variable_value (struct dwarf_expr_context *ctx, sect_offset sect_off,
 
   struct type *type = lookup_pointer_type (die_type);
   struct frame_info *frame = get_selected_frame (_("No frame selected."));
-  return indirect_synthetic_pointer (sect_off, 0, per_cu, frame, type, true);
+  return indirect_synthetic_pointer (sect_off, 0, per_cu, per_objfile, frame,
+				     type, true);
 }
 
 class dwarf_evaluate_loc_desc : public dwarf_expr_context
@@ -660,7 +664,7 @@ public:
 
   void dwarf_call (cu_offset die_offset) override
   {
-    per_cu_dwarf_call (this, die_offset, per_cu);
+    per_cu_dwarf_call (this, die_offset, per_cu, per_objfile);
   }
 
   /* Helper interface of sect_variable_value for
@@ -668,7 +672,7 @@ public:
 
   struct value *dwarf_variable_value (sect_offset sect_off) override
   {
-    return sect_variable_value (this, sect_off, per_cu);
+    return sect_variable_value (this, sect_off, per_cu, per_objfile);
   }
 
   struct type *get_base_type (cu_offset die_offset, int size) override
@@ -1963,7 +1967,8 @@ get_frame_address_in_block_wrapper (void *baton)
 
 static struct value *
 fetch_const_value_from_synthetic_pointer (sect_offset die, LONGEST byte_offset,
-					  struct dwarf2_per_cu_data *per_cu,
+					  dwarf2_per_cu_data *per_cu,
+					  dwarf2_per_objfile *per_objfile,
 					  struct type *type)
 {
   struct value *result = NULL;
@@ -1971,7 +1976,8 @@ fetch_const_value_from_synthetic_pointer (sect_offset die, LONGEST byte_offset,
   LONGEST len;
 
   auto_obstack temp_obstack;
-  bytes = dwarf2_fetch_constant_bytes (die, per_cu, &temp_obstack, &len);
+  bytes = dwarf2_fetch_constant_bytes (die, per_cu, per_objfile,
+				       &temp_obstack, &len);
 
   if (bytes != NULL)
     {
@@ -1994,18 +2000,20 @@ fetch_const_value_from_synthetic_pointer (sect_offset die, LONGEST byte_offset,
 
 static struct value *
 indirect_synthetic_pointer (sect_offset die, LONGEST byte_offset,
-			    struct dwarf2_per_cu_data *per_cu,
+			    dwarf2_per_cu_data *per_cu,
+			    dwarf2_per_objfile *per_objfile,
 			    struct frame_info *frame, struct type *type,
 			    bool resolve_abstract_p)
 {
   /* Fetch the location expression of the DIE we're pointing to.  */
   struct dwarf2_locexpr_baton baton
-    = dwarf2_fetch_die_loc_sect_off (die, per_cu,
+    = dwarf2_fetch_die_loc_sect_off (die, per_cu, per_objfile,
 				     get_frame_address_in_block_wrapper, frame,
 				     resolve_abstract_p);
 
   /* Get type of pointed-to DIE.  */
-  struct type *orig_type = dwarf2_fetch_die_type_sect_off (die, per_cu);
+  struct type *orig_type = dwarf2_fetch_die_type_sect_off (die, per_cu,
+							   per_objfile);
   if (orig_type == NULL)
     invalid_synthetic_pointer ();
 
@@ -2019,7 +2027,7 @@ indirect_synthetic_pointer (sect_offset die, LONGEST byte_offset,
 					  byte_offset);
   else
     return fetch_const_value_from_synthetic_pointer (die, byte_offset, per_cu,
-						     type);
+						     per_objfile, type);
 }
 
 /* An implementation of an lval_funcs method to indirect through a
@@ -2096,7 +2104,7 @@ indirect_pieced_value (struct value *value)
 
   return indirect_synthetic_pointer (piece->v.ptr.die_sect_off,
 				     byte_offset, c->per_cu,
-				     frame, type);
+				     c->per_objfile, frame, type);
 }
 
 /* Implementation of the coerce_ref method of lval_funcs for synthetic C++
@@ -2123,7 +2131,7 @@ coerce_pieced_ref (const struct value *value)
       return indirect_synthetic_pointer
 	(closure->pieces[0].v.ptr.die_sect_off,
 	 closure->pieces[0].v.ptr.offset,
-	 closure->per_cu, frame, type);
+	 closure->per_cu, closure->per_objfile, frame, type);
     }
   else
     {
@@ -2752,7 +2760,7 @@ public:
 
   void dwarf_call (cu_offset die_offset) override
   {
-    per_cu_dwarf_call (this, die_offset, per_cu);
+    per_cu_dwarf_call (this, die_offset, per_cu, per_objfile);
   }
 
   /* Helper interface of sect_variable_value for
@@ -2760,7 +2768,7 @@ public:
 
   struct value *dwarf_variable_value (sect_offset sect_off) override
   {
-    return sect_variable_value (this, sect_off, per_cu);
+    return sect_variable_value (this, sect_off, per_cu, per_objfile);
   }
 
   /* DW_OP_entry_value accesses require a caller, therefore a
@@ -3589,7 +3597,7 @@ dwarf2_compile_expr_to_ax (struct agent_expr *expr, struct axs_value *loc,
 	    op_ptr += size;
 
 	    cu_offset cuoffset = (cu_offset) uoffset;
-	    block = dwarf2_fetch_die_loc_cu_off (cuoffset, per_cu,
+	    block = dwarf2_fetch_die_loc_cu_off (cuoffset, per_cu, per_objfile,
 						 get_ax_pc, expr);
 
 	    /* DW_OP_call_ref is currently not supported.  */
diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c
index 3125173..260fb54 100644
--- a/gdb/dwarf2/read.c
+++ b/gdb/dwarf2/read.c
@@ -22299,6 +22299,7 @@ follow_die_ref (struct die_info *src_die, const struct attribute *attr,
 struct dwarf2_locexpr_baton
 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off,
 			       dwarf2_per_cu_data *per_cu,
+			       dwarf2_per_objfile *dwarf2_per_objfile,
 			       CORE_ADDR (*get_frame_pc) (void *baton),
 			       void *baton, bool resolve_abstract_p)
 {
@@ -22306,7 +22307,6 @@ dwarf2_fetch_die_loc_sect_off (sect_offset sect_off,
   struct die_info *die;
   struct attribute *attr;
   struct dwarf2_locexpr_baton retval;
-  struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile;
   struct objfile *objfile = dwarf2_per_objfile->objfile;
 
   if (per_cu->cu == NULL)
@@ -22403,12 +22403,14 @@ dwarf2_fetch_die_loc_sect_off (sect_offset sect_off,
 struct dwarf2_locexpr_baton
 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu,
 			     dwarf2_per_cu_data *per_cu,
+			     dwarf2_per_objfile *per_objfile,
 			     CORE_ADDR (*get_frame_pc) (void *baton),
 			     void *baton)
 {
   sect_offset sect_off = per_cu->sect_off + to_underlying (offset_in_cu);
 
-  return dwarf2_fetch_die_loc_sect_off (sect_off, per_cu, get_frame_pc, baton);
+  return dwarf2_fetch_die_loc_sect_off (sect_off, per_cu, per_objfile,
+					get_frame_pc, baton);
 }
 
 /* Write a constant of a given type as target-ordered bytes into
@@ -22435,6 +22437,7 @@ write_constant_as_bytes (struct obstack *obstack,
 const gdb_byte *
 dwarf2_fetch_constant_bytes (sect_offset sect_off,
 			     dwarf2_per_cu_data *per_cu,
+			     dwarf2_per_objfile *per_objfile,
 			     obstack *obstack,
 			     LONGEST *len)
 {
@@ -22445,10 +22448,10 @@ dwarf2_fetch_constant_bytes (sect_offset sect_off,
   struct type *type;
   LONGEST value;
   enum bfd_endian byte_order;
-  struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile;
+  struct objfile *objfile = per_objfile->objfile;
 
   if (per_cu->cu == NULL)
-    load_cu (per_cu, per_cu->dwarf2_per_objfile, false);
+    load_cu (per_cu, per_objfile, false);
   cu = per_cu->cu;
   if (cu == NULL)
     {
@@ -22564,13 +22567,14 @@ dwarf2_fetch_constant_bytes (sect_offset sect_off,
 
 struct type *
 dwarf2_fetch_die_type_sect_off (sect_offset sect_off,
-				dwarf2_per_cu_data *per_cu)
+				dwarf2_per_cu_data *per_cu,
+				dwarf2_per_objfile *per_objfile)
 {
   struct dwarf2_cu *cu;
   struct die_info *die;
 
   if (per_cu->cu == NULL)
-    load_cu (per_cu, per_cu->dwarf2_per_objfile, false);
+    load_cu (per_cu, per_objfile, false);
   cu = per_cu->cu;
   if (!cu)
     return NULL;
diff --git a/gdb/dwarf2/read.h b/gdb/dwarf2/read.h
index 68e322f..c6d236b 100644
--- a/gdb/dwarf2/read.h
+++ b/gdb/dwarf2/read.h
@@ -589,6 +589,7 @@ CORE_ADDR dwarf2_read_addr_index (dwarf2_per_cu_data *per_cu,
 
 struct dwarf2_locexpr_baton dwarf2_fetch_die_loc_sect_off
   (sect_offset sect_off, dwarf2_per_cu_data *per_cu,
+   dwarf2_per_objfile *per_objfile,
    CORE_ADDR (*get_frame_pc) (void *baton),
    void *baton, bool resolve_abstract_p = false);
 
@@ -597,6 +598,7 @@ struct dwarf2_locexpr_baton dwarf2_fetch_die_loc_sect_off
 
 struct dwarf2_locexpr_baton dwarf2_fetch_die_loc_cu_off
   (cu_offset offset_in_cu, dwarf2_per_cu_data *per_cu,
+   dwarf2_per_objfile *per_objfile,
    CORE_ADDR (*get_frame_pc) (void *baton),
    void *baton);
 
@@ -606,14 +608,16 @@ struct dwarf2_locexpr_baton dwarf2_fetch_die_loc_cu_off
    does not have a DW_AT_const_value, return NULL.  */
 
 extern const gdb_byte *dwarf2_fetch_constant_bytes
-  (sect_offset sect_off, dwarf2_per_cu_data *per_cu, obstack *obstack,
+  (sect_offset sect_off, dwarf2_per_cu_data *per_cu,
+   dwarf2_per_objfile *per_objfile, obstack *obstack,
    LONGEST *len);
 
 /* Return the type of the die at SECT_OFF in PER_CU.  Return NULL if no
    valid type for this die is found.  */
 
 struct type *dwarf2_fetch_die_type_sect_off
-  (sect_offset sect_off, dwarf2_per_cu_data *per_cu);
+  (sect_offset sect_off, dwarf2_per_cu_data *per_cu,
+   dwarf2_per_objfile *per_objfile);
 
 /* When non-zero, dump line number entries as they are read in.  */
 extern unsigned int dwarf_line_debug;