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This patch (finally!) makes it so that trying to use XNEW with a type that requires "new" will cause a compilation error. The criterion I initially used to allow a type to use XNEW (which calls malloc in the end) was std::is_trivially_constructible, but then realized that gcc 4.8 did not have it. Instead, I went with: using IsMallocatable = std::is_pod<T>; which is just a bit more strict, which doesn't hurt. A similar thing is done for macros that free instead of allocated, the criterion is: using IsFreeable = gdb::Or<std::is_trivially_destructible<T>, std::is_void<T>>; Trying to use XNEW on a type that requires new will result in an error like this: In file included from /home/simark/src/binutils-gdb/gdb/common/common-utils.h:26:0, from /home/simark/src/binutils-gdb/gdb/common/common-defs.h:78, from /home/simark/src/binutils-gdb/gdb/defs.h:28, from /home/simark/src/binutils-gdb/gdb/lala.c:1: /home/simark/src/binutils-gdb/gdb/common/poison.h: In instantiation of ‘T* xnew() [with T = bar]’: /home/simark/src/binutils-gdb/gdb/lala.c:13:3: required from here /home/simark/src/binutils-gdb/gdb/common/poison.h:103:3: error: static assertion failed: Trying to use XNEW with a non-POD data type. Use operator new instead. static_assert (IsMallocatable<T>::value, "Trying to use XNEW with a non-POD\ ^~~~~~~~~~~~~ Generated-code-wise, it adds one more function call (xnew<T>) when using XNEW and building with -O0, but it all goes away with optimizations enabled. gdb/ChangeLog: * common/common-utils.h: Include poison.h. (xfree): Remove declaration, add definition with static_assert. * common/common-utils.c (xfree): Remove. * common/poison.h (IsMallocatable): Define. (IsFreeable): Define. (free): Delete for non-freeable types. (xnew): New. (XNEW): Undef and redefine. (xcnew): New. (XCNEW): Undef and redefine. (xdelete): New. (XDELETE): Undef and redefine. (xnewvec): New. (XNEWVEC): Undef and redefine. (xcnewvec): New. (XCNEWVEC): Undef and redefine. (xresizevec): New. (XRESIZEVEC): Undef and redefine. (xdeletevec): New. (XDELETEVEC): Undef and redefine. (xnewvar): New. (XNEWVAR): Undef and redefine. (xcnewvar): New. (XCNEWVAR): Undef and redefine. (xresizevar): New. (XRESIZEVAR): Undef and redefine. |
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bfd | ||
binutils | ||
config | ||
cpu | ||
elfcpp | ||
etc | ||
gas | ||
gdb | ||
gold | ||
gprof | ||
include | ||
intl | ||
ld | ||
libdecnumber | ||
libiberty | ||
opcodes | ||
readline | ||
sim | ||
texinfo | ||
zlib | ||
.cvsignore | ||
.gitattributes | ||
.gitignore | ||
ChangeLog | ||
compile | ||
config-ml.in | ||
config.guess | ||
config.rpath | ||
config.sub | ||
configure | ||
configure.ac | ||
COPYING | ||
COPYING3 | ||
COPYING3.LIB | ||
COPYING.LIB | ||
COPYING.LIBGLOSS | ||
COPYING.NEWLIB | ||
depcomp | ||
djunpack.bat | ||
install-sh | ||
libtool.m4 | ||
lt~obsolete.m4 | ||
ltgcc.m4 | ||
ltmain.sh | ||
ltoptions.m4 | ||
ltsugar.m4 | ||
ltversion.m4 | ||
MAINTAINERS | ||
Makefile.def | ||
Makefile.in | ||
Makefile.tpl | ||
makefile.vms | ||
missing | ||
mkdep | ||
mkinstalldirs | ||
move-if-change | ||
README | ||
README-maintainer-mode | ||
setup.com | ||
src-release.sh | ||
symlink-tree | ||
ylwrap |
README for GNU development tools This directory contains various GNU compilers, assemblers, linkers, debuggers, etc., plus their support routines, definitions, and documentation. If you are receiving this as part of a GDB release, see the file gdb/README. If with a binutils release, see binutils/README; if with a libg++ release, see libg++/README, etc. That'll give you info about this package -- supported targets, how to use it, how to report bugs, etc. It is now possible to automatically configure and build a variety of tools with one command. To build all of the tools contained herein, run the ``configure'' script here, e.g.: ./configure make To install them (by default in /usr/local/bin, /usr/local/lib, etc), then do: make install (If the configure script can't determine your type of computer, give it the name as an argument, for instance ``./configure sun4''. You can use the script ``config.sub'' to test whether a name is recognized; if it is, config.sub translates it to a triplet specifying CPU, vendor, and OS.) If you have more than one compiler on your system, it is often best to explicitly set CC in the environment before running configure, and to also set CC when running make. For example (assuming sh/bash/ksh): CC=gcc ./configure make A similar example using csh: setenv CC gcc ./configure make Much of the code and documentation enclosed is copyright by the Free Software Foundation, Inc. See the file COPYING or COPYING.LIB in the various directories, for a description of the GNU General Public License terms under which you can copy the files. REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info on where and how to report problems.