Re: [patch] PR other/65366: Fix gdbhooks.py for GDB with Python3

[Richard Biener <richard dot guenther at gmail dot com>]

On Mon, Mar 9, 2015 at 10:43 PM, Jan Kratochvil
<jan.kratochvil@redhat.com> wrote:
> Hi,
>
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65366
>
> GDB Python support upstream has always been compatible with Python3.
> Fedora since F-22 builds GDB with Python3 by default (<=F-21 GDB used Python2).
>
> gdbhooks.py in GCC trunk is compatible with Python2 but not Python3.
>
> gdb-7.9-10.fc23.x86_64
> (gdb) source /home/jkratoch/redhat/gcchead/gcc/c/../gdbhooks.py
>   File "/home/jkratoch/redhat/gcchead/gcc/c/../gdbhooks.py", line 372
>     print format_[i]
>                 ^
> SyntaxError: Missing parentheses in call to 'print'
>
> Additionally after fixing the 'print' incompatibility one gets randomly:
>
> dependence_info = {clique = 257, Python Exception <class 'NameError'> name 'long' is not defined:
> base = 1}}}, type = },
>
> OK for check-in?
>
> The long()->int() change I have followed from:
>         https://stackoverflow.com/questions/14904814/nameerror-global-name-long-is-not-defined/14904834

I think this change causes

(gdb) p *$2
$3 = {type = undef_vec_info_type, live = false, Python Exception
<class 'gdb.error'> Cannot convert value to int.:
in_pattern_p = false, stmt = ,
Python Exception <class 'gdb.error'> Cannot convert value to int.:
Python Exception <class 'gdb.error'> Cannot convert value to int.:
  loop_vinfo = 0x2272e70, vectype = , vectorized_stmt = ,
Python Exception <class 'gdb.error'> Cannot convert value to int.:
Python Exception <class 'gdb.error'> Cannot convert value to int.:
Python Exception <class 'gdb.error'> Cannot convert value to int.:
  data_ref_info = 0x226bdd0, dr_base_address = , dr_init = , dr_offset = ,
Python Exception <class 'gdb.error'> Cannot convert value to int.:
Python Exception <class 'gdb.error'> Cannot convert value to int.:
Python Exception <class 'gdb.error'> Cannot convert value to int.:
Python Exception <class 'gdb.error'> Cannot convert value to int.:
...

and makes the pretty-printers compeltely unusable for me.

gdb 7.9, python 2.7.6

Richard.

>
> Thanks,
> Jan
>
> 2015-03-09  Jan Kratochvil  <jan.kratochvil@redhat.com>
>
>         PR other/65366
>         * gdbhooks.py: Use int(...) instead of long(...).  Use print(...)
>         instead of print ... .
>
> Index: gcc/gdbhooks.py
> ===================================================================
> --- gcc/gdbhooks.py     (revision 221277)
> +++ gcc/gdbhooks.py     (working copy)
> @@ -158,7 +158,7 @@ class Tree:
>          self.gdbval = gdbval
>
>      def is_nonnull(self):
> -        return long(self.gdbval)
> +        return int(self.gdbval)
>
>      def TREE_CODE(self):
>          """
> @@ -197,7 +197,7 @@ class TreePrinter:
>          # like gcc/print-tree.c:print_node_brief
>          # #define TREE_CODE(NODE) ((enum tree_code) (NODE)->base.code)
>          # tree_code_name[(int) TREE_CODE (node)])
> -        if long(self.gdbval) == 0:
> +        if int(self.gdbval) == 0:
>              return '<tree 0x0>'
>
>          val_TREE_CODE = self.node.TREE_CODE()
> @@ -209,17 +209,17 @@ class TreePrinter:
>          val_tclass = val_tree_code_type[val_TREE_CODE]
>
>          val_tree_code_name = gdb.parse_and_eval('tree_code_name')
> -        val_code_name = val_tree_code_name[long(val_TREE_CODE)]
> -        #print val_code_name.string()
> +        val_code_name = val_tree_code_name[int(val_TREE_CODE)]
> +        #print(val_code_name.string())
>
> -        result = '<%s 0x%x' % (val_code_name.string(), long(self.gdbval))
> -        if long(val_tclass) == tcc_declaration:
> +        result = '<%s 0x%x' % (val_code_name.string(), int(self.gdbval))
> +        if int(val_tclass) == tcc_declaration:
>              tree_DECL_NAME = self.node.DECL_NAME()
>              if tree_DECL_NAME.is_nonnull():
>                   result += ' %s' % tree_DECL_NAME.IDENTIFIER_POINTER()
>              else:
>                  pass # TODO: labels etc
> -        elif long(val_tclass) == tcc_type:
> +        elif int(val_tclass) == tcc_type:
>              tree_TYPE_NAME = Tree(self.gdbval['type_common']['name'])
>              if tree_TYPE_NAME.is_nonnull():
>                  if tree_TYPE_NAME.TREE_CODE() == IDENTIFIER_NODE:
> @@ -242,8 +242,8 @@ class CGraphNodePrinter:
>          self.gdbval = gdbval
>
>      def to_string (self):
> -        result = '<cgraph_node* 0x%x' % long(self.gdbval)
> -        if long(self.gdbval):
> +        result = '<cgraph_node* 0x%x' % int(self.gdbval)
> +        if int(self.gdbval):
>              # symtab_node::name calls lang_hooks.decl_printable_name
>              # default implementation (lhd_decl_printable_name) is:
>              #    return IDENTIFIER_POINTER (DECL_NAME (decl));
> @@ -261,12 +261,12 @@ class DWDieRefPrinter:
>          self.gdbval = gdbval
>
>      def to_string (self):
> -        if long(self.gdbval) == 0:
> +        if int(self.gdbval) == 0:
>              return '<dw_die_ref 0x0>'
> -        result = '<dw_die_ref 0x%x' % long(self.gdbval)
> +        result = '<dw_die_ref 0x%x' % int(self.gdbval)
>          result += ' %s' % self.gdbval['die_tag']
> -        if long(self.gdbval['die_parent']) != 0:
> -            result += ' <parent=0x%x %s>' % (long(self.gdbval['die_parent']),
> +        if int(self.gdbval['die_parent']) != 0:
> +            result += ' <parent=0x%x %s>' % (int(self.gdbval['die_parent']),
>                                               self.gdbval['die_parent']['die_tag'])
>
>          result += '>'
> @@ -279,13 +279,13 @@ class GimplePrinter:
>          self.gdbval = gdbval
>
>      def to_string (self):
> -        if long(self.gdbval) == 0:
> +        if int(self.gdbval) == 0:
>              return '<gimple 0x0>'
>          val_gimple_code = self.gdbval['code']
>          val_gimple_code_name = gdb.parse_and_eval('gimple_code_name')
> -        val_code_name = val_gimple_code_name[long(val_gimple_code)]
> +        val_code_name = val_gimple_code_name[int(val_gimple_code)]
>          result = '<%s 0x%x' % (val_code_name.string(),
> -                               long(self.gdbval))
> +                               int(self.gdbval))
>          result += '>'
>          return result
>
> @@ -306,9 +306,9 @@ class BasicBlockPrinter:
>          self.gdbval = gdbval
>
>      def to_string (self):
> -        result = '<basic_block 0x%x' % long(self.gdbval)
> -        if long(self.gdbval):
> -            result += ' (%s)' % bb_index_to_str(long(self.gdbval['index']))
> +        result = '<basic_block 0x%x' % int(self.gdbval)
> +        if int(self.gdbval):
> +            result += ' (%s)' % bb_index_to_str(int(self.gdbval['index']))
>          result += '>'
>          return result
>
> @@ -317,10 +317,10 @@ class CfgEdgePrinter:
>          self.gdbval = gdbval
>
>      def to_string (self):
> -        result = '<edge 0x%x' % long(self.gdbval)
> -        if long(self.gdbval):
> -            src = bb_index_to_str(long(self.gdbval['src']['index']))
> -            dest = bb_index_to_str(long(self.gdbval['dest']['index']))
> +        result = '<edge 0x%x' % int(self.gdbval)
> +        if int(self.gdbval):
> +            src = bb_index_to_str(int(self.gdbval['src']['index']))
> +            dest = bb_index_to_str(int(self.gdbval['dest']['index']))
>              result += ' (%s -> %s)' % (src, dest)
>          result += '>'
>          return result
> @@ -336,7 +336,7 @@ class Rtx:
>
>  def GET_RTX_LENGTH(code):
>      val_rtx_length = gdb.parse_and_eval('rtx_length')
> -    return long(val_rtx_length[code])
> +    return int(val_rtx_length[code])
>
>  def GET_RTX_NAME(code):
>      val_rtx_name = gdb.parse_and_eval('rtx_name')
> @@ -359,17 +359,17 @@ class RtxPrinter:
>          """
>          # We use print_inline_rtx to avoid a trailing newline
>          gdb.execute('call print_inline_rtx (stderr, (const_rtx) %s, 0)'
> -                    % long(self.gdbval))
> +                    % int(self.gdbval))
>          return ''
>
>          # or by hand; based on gcc/print-rtl.c:print_rtx
>          result = ('<rtx_def 0x%x'
> -                  % (long(self.gdbval)))
> +                  % (int(self.gdbval)))
>          code = self.rtx.GET_CODE()
>          result += ' (%s' % GET_RTX_NAME(code)
>          format_ = GET_RTX_FORMAT(code)
>          for i in range(GET_RTX_LENGTH(code)):
> -            print format_[i]
> +            print(format_[i])
>          result += ')>'
>          return result
>
> @@ -380,11 +380,11 @@ class PassPrinter:
>          self.gdbval = gdbval
>
>      def to_string (self):
> -        result = '<opt_pass* 0x%x' % long(self.gdbval)
> -        if long(self.gdbval):
> +        result = '<opt_pass* 0x%x' % int(self.gdbval)
> +        if int(self.gdbval):
>              result += (' "%s"(%i)'
>                         % (self.gdbval['name'].string(),
> -                          long(self.gdbval['static_pass_number'])))
> +                          int(self.gdbval['static_pass_number'])))
>          result += '>'
>          return result
>
> @@ -401,10 +401,10 @@ class VecPrinter:
>      def to_string (self):
>          # A trivial implementation; prettyprinting the contents is done
>          # by gdb calling the "children" method below.
> -        return '0x%x' % long(self.gdbval)
> +        return '0x%x' % int(self.gdbval)
>
>      def children (self):
> -        if long(self.gdbval) == 0:
> +        if int(self.gdbval) == 0:
>              return
>          m_vecpfx = self.gdbval['m_vecpfx']
>          m_num = m_vecpfx['m_num']
>