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Handle TYPE_CODE_PTR when printing Rust types

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This changes the Rust type printers to handle TYPE_CODE_PTR.  The
current approach is not ideal, because currently the code can't
distinguish between mut and const, or between pointers and references.
(These are debuginfo deficiencies, for which there are rustc bugs on
file.)

Meanwhile, this at least clears up the case seen in PR rust/23625.

Tested on x86-64 Fedora 28.  The nightly compiler gives the best
results, but I regression-tested with stable and beta as well.

gdb/ChangeLog
2018-11-16  Tom Tromey  <tom@tromey.com>

	PR rust/23625:
	* rust-lang.c (rust_internal_print_type): Handle TYPE_CODE_PTR.

gdb/testsuite/ChangeLog
2018-11-19  Tom Tromey  <tom@tromey.com>

	PR rust/23625:
	* gdb.rust/simple.exp: Add ptype test.  Update expected output.
	* gdb.rust/expr.exp: Update expected output.  Change one test.
This commit is contained in:
Tom Tromey 2018-11-16 15:30:35 -07:00
parent 994b876a51
commit 73fc52c4cc
5 changed files with 34 additions and 8 deletions
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14
gdb/rust-lang.c
View file

@ -918,6 +918,20 @@ rust_internal_print_type (struct type *type, const char *varstring,
}
break;
case TYPE_CODE_PTR:
{
if (TYPE_NAME (type) != nullptr)
fputs_filtered (TYPE_NAME (type), stream);
else
{
/* We currently can't distinguish between pointers and
references. */
fputs_filtered ("*mut ", stream);
type_print (TYPE_TARGET_TYPE (type), "", stream, 0);
}
}
break;
default:
c_printer:
c_print_type (type, varstring, stream, show, level, flags);