Reimplement tui_get_begin_asm_address

tui_get_begin_asm_address looks for the inferior's "main" to display
it.  I think this is incorrect in two ways.

First, it should probably instead use the user's most recent source
context, if one has been set.

Second, it uses a hard-coded list of "main" names, but gdb already has
a better approach to handling this.

This patch fixes both of these problems.

gdb/ChangeLog
2019-12-20  Tom Tromey  <tom@tromey.com>

	* tui/tui-disasm.c (tui_get_begin_asm_address): Use
	get_current_source_symtab_and_line, and main_name.

Change-Id: I77dc13d49148e8dec5aa3eeb357ce3968a68d0bd

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index f5d667e78ce8023827c0fa7b74ada0a8ac6add87..e4715362c061b5e6ba07e3f7795e3b3aab61cd9f 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2019-12-20  Tom Tromey  <tom@tromey.com>
+
+       * tui/tui-disasm.c (tui_get_begin_asm_address): Use
+       get_current_source_symtab_and_line, and main_name.
+
 2019-12-20  Tom Tromey  <tom@tromey.com>
 
        * tui/tui.c (tui_show_source): Update.

diff --git a/gdb/tui/tui-disasm.c b/gdb/tui/tui-disasm.c
index 376343be6617dc9cd7821625fc5bdd41a2c10b24..d8f2d386892b3e01cf7b85993aab479f5e9fb1a2 100644 (file)
--- a/gdb/tui/tui-disasm.c
+++ b/gdb/tui/tui-disasm.c
@@ -258,25 +258,28 @@ tui_get_begin_asm_address (struct gdbarch **gdbarch_p, CORE_ADDR *addr_p)
 {
   struct tui_locator_window *locator;
   struct gdbarch *gdbarch = get_current_arch ();
-  CORE_ADDR addr;
+  CORE_ADDR addr = 0;
 
   locator = tui_locator_win_info_ptr ();
 
   if (locator->addr == 0)
     {
-      struct bound_minimal_symbol main_symbol;
-
-      /* Find address of the start of program.
-         Note: this should be language specific.  */
-      main_symbol = lookup_minimal_symbol ("main", NULL, NULL);
-      if (main_symbol.minsym == 0)
-        main_symbol = lookup_minimal_symbol ("MAIN", NULL, NULL);
-      if (main_symbol.minsym == 0)
-        main_symbol = lookup_minimal_symbol ("_start", NULL, NULL);
-      if (main_symbol.minsym)
-        addr = BMSYMBOL_VALUE_ADDRESS (main_symbol);
-      else
-        addr = 0;
+      if (have_full_symbols () || have_partial_symbols ())
+       {
+         set_default_source_symtab_and_line ();
+         struct symtab_and_line sal = get_current_source_symtab_and_line ();
+
+         if (sal.symtab != nullptr)
+           find_line_pc (sal.symtab, sal.line, &addr);
+       }
+
+      if (addr == 0)
+       {
+         struct bound_minimal_symbol main_symbol
+           = lookup_minimal_symbol (main_name (), nullptr, nullptr);
+         if (main_symbol.minsym != nullptr)
+           addr = BMSYMBOL_VALUE_ADDRESS (main_symbol);
+       }
     }
   else                         /* The target is executing.  */
     {