https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116847
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Feels like what I was seeing on i686-linux but not on x86_64-linux.
Under valgrind I saw errors like:
==4027220== Source and destination overlap in memcpy(0x4627154, 0x4627154, 12)
==4027220== at 0x404B93E: memcpy (vg_replace_strmem.c:1123)
==4027220== by 0xAAD5618: allocate_object(unsigned int, obstack&)
(pretty-print.cc:1183)
==4027220== by 0xAAD8C0E: operator new (pretty-print.cc:1210)
==4027220== by 0xAAD8C0E: make (pretty-print-format-impl.h:305)
==4027220== by 0xAAD8C0E: format_phase_1 (pretty-print.cc:1659)
==4027220== by 0xAAD8C0E: pretty_printer::format(text_info&)
(pretty-print.cc:1618)
==4027220== by 0xAAA840E: pp_format (pretty-print.h:583)
==4027220== by 0xAAA840E:
diagnostic_context::report_diagnostic(diagnostic_info*) (diagnostic.cc:1260)
==4027220== by 0xAAA8703:
diagnostic_context::diagnostic_impl(rich_location*, diagnostic_metadata const*,
diagnostic_option_id, char const*, char**, diagnostic_t) (diagnostic.cc:1404)
==4027220== by 0xAAB8682: warning(diagnostic_option_id, char const*, ...)
(diagnostic-global-context.cc:166)
==4027220== by 0x97725F5: warn_deprecated_use(tree_node*, tree_node*)
(tree.cc:12485)
==4027220== by 0x8B6694B: mark_used(tree_node*, int) (decl2.cc:6121)
==4027220== by 0x8C9E25E: tsubst_expr(tree_node*, tree_node*, int,
tree_node*) [clone .part.0] (pt.cc:21626)
==4027220== by 0x8C9E5E6: tsubst_expr(tree_node*, tree_node*, int,
tree_node*) [clone .part.0] (pt.cc:20935)
==4027220== by 0x8C9E1D7: tsubst_expr(tree_node*, tree_node*, int,
tree_node*) [clone .part.0] (pt.cc:20424)
==4027220== by 0x8C9DF2E: tsubst_expr(tree_node*, tree_node*, int,
tree_node*) [clone .part.0] (pt.cc:20496)
so I'm not trying:
--- gcc/pretty-print.cc.jj
+++ gcc/pretty-print.cc
@@ -1180,7 +1180,7 @@ allocate_object (size_t sz, obstack &s)
/* We must not be half-way through an object. */
gcc_assert (obstack_base (&s) == obstack_next_free (&s));
- obstack_grow (&s, obstack_base (&s), sz);
+ obstack_blank (&s, sz);
void *buf = obstack_finish (&s);
return buf;
}
fix for that and with that I can't reproduce the warnings any more on the
single test, full regtest now running.
