Turn start_psymtab_common into a constructor

This turns start_psymtab_common into a constructor, and then changes
the callers to use "new" directly.  This completes the psymtab
allocation transition -- now it is possible for symbol readers to
subclass struct partial_symtab.

gdb/ChangeLog
2020-01-26  Tom Tromey  <tom@tromey.com>

	* xcoffread.c (xcoff_start_psymtab): Use new.
	* psymtab.c (partial_symtab::partial_symtab): New constructor,
	renamed from start_psymtab_common.
	* psympriv.h (struct partial_symtab): Add new constructor.
	(start_psymtab_common): Don't declare.
	* mdebugread.c (parse_partial_symbols): Use new.
	* dwarf2read.c (create_partial_symtab): Use new.
	* dbxread.c (start_psymtab): Use new.
	* ctfread.c (create_partial_symtab): Use new.

Change-Id: I5a0217bcb52bcfa442559771954bb66bd9ccbf02

8 files changed, 37 insertions, 31 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 854ac31..6353a00 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,17 @@
 2020-01-26  Tom Tromey  <tom@tromey.com>
 
+	* xcoffread.c (xcoff_start_psymtab): Use new.
+	* psymtab.c (partial_symtab::partial_symtab): New constructor,
+	renamed from start_psymtab_common.
+	* psympriv.h (struct partial_symtab): Add new constructor.
+	(start_psymtab_common): Don't declare.
+	* mdebugread.c (parse_partial_symbols): Use new.
+	* dwarf2read.c (create_partial_symtab): Use new.
+	* dbxread.c (start_psymtab): Use new.
+	* ctfread.c (create_partial_symtab): Use new.
+
+2020-01-26  Tom Tromey  <tom@tromey.com>
+
 	* xcoffread.c (xcoff_end_psymtab): Use new.
 	* psymtab.c (start_psymtab_common): Use new.
 	(partial_symtab::partial_symtab): Rename from allocate_psymtab.
diff --git a/gdb/ctfread.c b/gdb/ctfread.c
index c41d96f..e3931fb 100644
--- a/gdb/ctfread.c
+++ b/gdb/ctfread.c
@@ -1299,7 +1299,7 @@ create_partial_symtab (const char *name,
   struct partial_symtab *pst;
   struct ctf_context *ccx;
 
-  pst = start_psymtab_common (objfile, name, 0);
+  pst = new partial_symtab (name, objfile, 0);
 
   ccx = XOBNEW (&objfile->objfile_obstack, struct ctf_context);
   ccx->fp = cfp;
diff --git a/gdb/dbxread.c b/gdb/dbxread.c
index 9527085..4e388fae 100644
--- a/gdb/dbxread.c
+++ b/gdb/dbxread.c
@@ -1903,8 +1903,8 @@ static struct partial_symtab *
 start_psymtab (struct objfile *objfile, const char *filename, CORE_ADDR textlow,
 	       int ldsymoff)
 {
-  struct partial_symtab *result =
-    start_psymtab_common (objfile, filename, textlow);
+  struct partial_symtab *result = new partial_symtab (filename, objfile,
+						      textlow);
 
   result->read_symtab_private =
     XOBNEW (&objfile->objfile_obstack, struct symloc);
diff --git a/gdb/dwarf2read.c b/gdb/dwarf2read.c
index 2cac286..f865fa4 100644
--- a/gdb/dwarf2read.c
+++ b/gdb/dwarf2read.c
@@ -8027,7 +8027,7 @@ create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name)
   struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile;
   struct partial_symtab *pst;
 
-  pst = start_psymtab_common (objfile, name, 0);
+  pst = new partial_symtab (name, objfile, 0);
 
   pst->psymtabs_addrmap_supported = true;
 
diff --git a/gdb/mdebugread.c b/gdb/mdebugread.c
index 2ec30ec..dafc7f4 100644
--- a/gdb/mdebugread.c
+++ b/gdb/mdebugread.c
@@ -2609,9 +2609,7 @@ parse_partial_symbols (minimal_symbol_reader &reader,
 	textlow = fh->adr;
       else
 	textlow = 0;
-      pst = start_psymtab_common (objfile,
-				  fdr_name (fh),
-				  textlow);
+      pst = new partial_symtab (fdr_name (fh), objfile, textlow);
       pst->read_symtab_private = XOBNEW (&objfile->objfile_obstack, symloc);
       memset (pst->read_symtab_private, 0, sizeof (struct symloc));
 
diff --git a/gdb/psympriv.h b/gdb/psympriv.h
index 74ff10e..82ae1b5 100644
--- a/gdb/psympriv.h
+++ b/gdb/psympriv.h
@@ -113,6 +113,14 @@ struct partial_symtab
   partial_symtab (const char *filename, struct objfile *objfile)
     ATTRIBUTE_NONNULL (2) ATTRIBUTE_NONNULL (3);
 
+  /* Like the above, but also sets the initial text low and text high
+     from the ADDR argument, and sets the global- and
+     static-offsets.  */
+
+  partial_symtab (const char *filename, struct objfile *objfile,
+		  CORE_ADDR addr)
+    ATTRIBUTE_NONNULL (2) ATTRIBUTE_NONNULL (3);
+
   /* Return the raw low text address of this partial_symtab.  */
   CORE_ADDR raw_text_low () const
   {
@@ -326,9 +334,6 @@ extern void add_psymbol_to_list (gdb::string_view name,
 
 extern void init_psymbol_list (struct objfile *objfile, int total_symbols);
 
-extern struct partial_symtab *start_psymtab_common (struct objfile *,
-						    const char *, CORE_ADDR);
-
 extern void end_psymtab_common (struct objfile *, struct partial_symtab *);
 
 static inline void
diff --git a/gdb/psymtab.c b/gdb/psymtab.c
index 844e718..b31461c 100644
--- a/gdb/psymtab.c
+++ b/gdb/psymtab.c
@@ -1475,24 +1475,18 @@ sort_pst_symbols (struct objfile *objfile, struct partial_symtab *pst)
     });
 }
 
-/* Allocate and partially fill a partial symtab.  It will be
-   completely filled at the end of the symbol list.
+/* Partially fill a partial symtab.  It will be completely filled at
+   the end of the symbol list.  */
 
-   FILENAME is the name of the symbol-file we are reading from.  */
-
-struct partial_symtab *
-start_psymtab_common (struct objfile *objfile,
-		      const char *filename,
-		      CORE_ADDR textlow)
+partial_symtab::partial_symtab (const char *filename,
+				struct objfile *objfile,
+				CORE_ADDR textlow)
+  : partial_symtab (filename, objfile)
 {
-  struct partial_symtab *psymtab;
-
-  psymtab = new partial_symtab (filename, objfile);
-  psymtab->set_text_low (textlow);
-  psymtab->set_text_high (psymtab->raw_text_low ()); /* default */
-  psymtab->globals_offset = objfile->partial_symtabs->global_psymbols.size ();
-  psymtab->statics_offset = objfile->partial_symtabs->static_psymbols.size ();
-  return psymtab;
+  set_text_low (textlow);
+  set_text_high (raw_text_low ()); /* default */
+  globals_offset = objfile->partial_symtabs->global_psymbols.size ();
+  statics_offset = objfile->partial_symtabs->static_psymbols.size ();
 }
 
 /* Perform "finishing up" operations of a partial symtab.  */
diff --git a/gdb/xcoffread.c b/gdb/xcoffread.c
index be10c4f..901c134 100644
--- a/gdb/xcoffread.c
+++ b/gdb/xcoffread.c
@@ -2007,11 +2007,8 @@ static struct partial_symtab *
 xcoff_start_psymtab (struct objfile *objfile,
 		     const char *filename, int first_symnum)
 {
-  struct partial_symtab *result =
-    start_psymtab_common (objfile,
-			  filename,
-			  /* We fill in textlow later.  */
-			  0);
+  /* We fill in textlow later.  */
+  struct partial_symtab *result = new partial_symtab (filename, objfile, 0);
 
   result->read_symtab_private =
     XOBNEW (&objfile->objfile_obstack, struct symloc);