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gdbhooks.py (TreePrinter.to_string): Recognize ggc_free'd memory.

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* gdbhooks.py (TreePrinter.to_string): Recognize ggc_free'd memory.

	* tree.c (get_tree_code_name): Likewise.
	* print-tree.c (print_node): Only briefly print a node with an
	invalid code.

From-SVN: r272150
This commit is contained in:
Jason Merrill 2019-06-11 08:40:08 -04:00 committed by Jason Merrill
parent de6abd8514
commit 9281275764
4 changed files with 24 additions and 8 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2019-06-11 Jason Merrill <jason@redhat.com>
* gdbhooks.py (TreePrinter.to_string): Recognize ggc_free'd memory.
* tree.c (get_tree_code_name): Likewise.
* print-tree.c (print_node): Only briefly print a node with an
invalid code.
2019-06-11 Jakub Jelinek <jakub@redhat.com>
PR bootstrap/90819

3
gcc/gdbhooks.py
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@ -222,6 +222,9 @@ class TreePrinter:
# extern const enum tree_code_class tree_code_type[];
# #define TREE_CODE_CLASS(CODE) tree_code_type[(int) (CODE)]
if val_TREE_CODE == 0xa5a5:
return '<ggc_freed 0x%x>' % intptr(self.gdbval)
val_tree_code_type = gdb.parse_and_eval('tree_code_type')
val_tclass = val_tree_code_type[val_TREE_CODE]

16
gcc/print-tree.c
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@ -233,6 +233,15 @@ print_node (FILE *file, const char *prefix, tree node, int indent,
return;
code = TREE_CODE (node);
/* It is unsafe to look at any other fields of a node with ERROR_MARK or
invalid code. */
if (code == ERROR_MARK || code >= MAX_TREE_CODES)
{
print_node_brief (file, prefix, node, indent);
return;
}
tclass = TREE_CODE_CLASS (code);
/* Don't get too deep in nesting. If the user wants to see deeper,
@ -251,13 +260,6 @@ print_node (FILE *file, const char *prefix, tree node, int indent,
return;
}
/* It is unsafe to look at any other fields of an ERROR_MARK node. */
if (code == ERROR_MARK)
{
print_node_brief (file, prefix, node, indent);
return;
}
/* Allow this function to be called if the table is not there. */
if (table)
{

6
gcc/tree.c
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@ -13450,7 +13450,11 @@ get_tree_code_name (enum tree_code code)
const char *invalid = "<invalid tree code>";
if (code >= MAX_TREE_CODES)
return invalid;
{
if (code == 0xa5a5)
return "ggc_freed";
return invalid;
}
return tree_code_name[code];
}