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Move the rust "{" hack 

The DWARF reader has a special case to work around a bug in some
versions of the Rust compiler -- it ignores mangled names that contain
a "{" character.

I noticed that this check should probably be in dw2_linkage_name
rather than only in dwarf2_physname.  The former is called in some
cases that the latter is not.

Also, I noticed that this work is not done for the partial DIE reader,
so this patch adds the check there as well.

gdb/ChangeLog
2020-04-24  Tom Tromey  <tom@tromey.com>

	* dwarf2/read.c (dw2_linkage_name): Move Rust "{" hack here...
	(dwarf2_physname): ... from here.
	(partial_die_info::read): Add Rust "{" hack.
This commit is contained in:
Tom Tromey 2020-04-24 15:35:01 -06:00 committed by Tom Tromey
parent ff98567107
commit 787de330ee
2 changed files with 17 additions and 6 deletions
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6
gdb/ChangeLog
View File

@ -1,3 +1,9 @@
2020-04-24 Tom Tromey <tom@tromey.com>
* dwarf2/read.c (dw2_linkage_name): Move Rust "{" hack here...
(dwarf2_physname): ... from here.
(partial_die_info::read): Add Rust "{" hack.
2020-04-24 Tom Tromey <tom@tromey.com>
* symtab.h (struct general_symbol_info) <set_demangled_name>: New

17
gdb/dwarf2/read.c
View File

@ -10032,6 +10032,12 @@ dw2_linkage_name (struct die_info *die, struct dwarf2_cu *cu)
if (linkage_name == NULL)
linkage_name = dwarf2_string_attr (die, DW_AT_MIPS_linkage_name, cu);
/* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
See https://github.com/rust-lang/rust/issues/32925. */
if (cu->language == language_rust && linkage_name != NULL
&& strchr (linkage_name, '{') != NULL)
linkage_name = NULL;
return linkage_name;
}
@ -10308,12 +10314,6 @@ dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu)
mangled = dw2_linkage_name (die, cu);
/* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
See https://github.com/rust-lang/rust/issues/32925. */
if (cu->language == language_rust && mangled != NULL
&& strchr (mangled, '{') != NULL)
mangled = NULL;
/* DW_AT_linkage_name is missing in some cases - depend on what GDB
has computed. */
gdb::unique_xmalloc_ptr<char> demangled;
@ -18301,6 +18301,11 @@ partial_die_info::read (const struct die_reader_specs *reader,
assume they will be the same, and we only store the last
one we see. */
linkage_name = DW_STRING (&attr);
/* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
See https://github.com/rust-lang/rust/issues/32925. */
if (cu->language == language_rust && linkage_name != NULL
&& strchr (linkage_name, '{') != NULL)
linkage_name = NULL;
break;
case DW_AT_low_pc:
has_low_pc_attr = 1;