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Fix copy-pasto, allocate objfile_per_bfd_storage with obstack_new 

I realized after pushing that I made a copy-pasto, I had:

  # define HAVE_IS_TRIVIALLY_COPYABLE 1

instead of

  # define HAVE_IS_TRIVIALLY_CONSTRUCTIBLE 1

with the consequence that IsMallocable was always std::true_type (and
was therefore not enforcing anything).  Fixing that mistake triggered a
build failure:

/home/simark/src/binutils-gdb/gdb/objfiles.c:150:12:   required from here
/home/simark/src/binutils-gdb/gdb/common/poison.h:228:3: error: static assertion failed: Trying to use XOBNEW with a non-POD data type.

I am not sure why I did not see this when I originally wrote the patch
(but I saw and fixed other failures).  In any case, I swapped XOBNEW
with obstack_new to get rid of it.

Regtested on the buildbot.

gdb/ChangeLog:

	* common/traits.h (HAVE_IS_TRIVIALLY_COPYABLE): Rename the wrong
	instance to...
	(HAVE_IS_TRIVIALLY_CONSTRUCTIBLE): ... this.
	* objfiles.c (get_objfile_bfd_data): Allocate
	objfile_per_bfd_storage with obstack_new when allocating on
	obstack.
This commit is contained in:
Simon Marchi 2018-05-20 23:18:29 -04:00
parent e39db4db7c
commit 184cde7552
3 changed files with 15 additions and 6 deletions
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9
gdb/ChangeLog
View File

@ -1,3 +1,12 @@
2018-05-20 Simon Marchi <simon.marchi@polymtl.ca>
* common/traits.h (HAVE_IS_TRIVIALLY_COPYABLE): Rename the wrong
instance to...
(HAVE_IS_TRIVIALLY_CONSTRUCTIBLE): ... this.
* objfiles.c (get_objfile_bfd_data): Allocate
objfile_per_bfd_storage with obstack_new when allocating on
obstack.
2018-05-20 Simon Marchi <simon.marchi@ericsson.com>
* ada-lang.c (cache_symbol): Use XOBNEW and/or XOBNEWVEC and/or

2
gdb/common/traits.h
View File

@ -38,7 +38,7 @@
in GCC 5. */
#if (__has_feature(is_trivially_constructible) \
|| (defined __GNUC__ && __GNUC__ >= 5))
# define HAVE_IS_TRIVIALLY_COPYABLE 1
# define HAVE_IS_TRIVIALLY_CONSTRUCTIBLE 1
#endif
namespace gdb {

10
gdb/objfiles.c
View File

@ -144,14 +144,14 @@ get_objfile_bfd_data (struct objfile *objfile, struct bfd *abfd)
storage
= ((struct objfile_per_bfd_storage *)
bfd_alloc (abfd, sizeof (struct objfile_per_bfd_storage)));
/* objfile_per_bfd_storage is not trivially constructible, must
call the ctor manually. */
storage = new (storage) objfile_per_bfd_storage ();
set_bfd_data (abfd, objfiles_bfd_data, storage);
}
else
storage = XOBNEW (&objfile->objfile_obstack, objfile_per_bfd_storage);
/* objfile_per_bfd_storage is not trivially constructible, must
call the ctor manually. */
storage = new (storage) objfile_per_bfd_storage ();
storage
= obstack_new<objfile_per_bfd_storage> (&objfile->objfile_obstack);
/* Look up the gdbarch associated with the BFD. */
if (abfd != NULL)