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2015-09-03Don't include <bits/stdio-lock.h> from installed <libio.h>.Joseph Myers
Every so often someone gets confused by the fact that the installed <bits/stdio-lock.h> header includes the non-installed <lowlevellock.h> header. This inclusion is not in fact a bug, because <bits/stdio-lock.h> only gets included by any header that users should include directly if _IO_MTSAFE_IO is defined, and that's an internal define used when building libio, not a feature test macro it's valid for users to define. However, on general principles it's best to have as little as possible in the installed headers that is inapplicable for valid uses of the installed glibc. This patch moves the include of <bits/stdio-lock.h> to the internal header include/libio.h, so that even if someone defines _IO_MTSAFE_IO it won't get included. This is intended as preparation for stopping <bits/stdio-lock.h> and <bits/libc-lock.h> from being installed at all (after this patch they aren't used in any installed header; formally of course they don't need to be installed even before this patch, but stopping them being installed before removing the #include would just exacerbate the confusion described above), and then moving those out of the bits/ namespace in accordance with the principle that that namespace is only for installed headers. The tests scanf15.c and scanf17.c avoid the internal headers; after this patch that means they need to undefine _IO_MTSAFE_IO as well as _LIBC so as to get a working _IO_lock_t definition for libio.h. This brings them closer to using the headers as an installed program would, which clearly accords with the intent of those tests. Tested for x86_64 (testsuite, and that installed stripped shared libraries are unchanged by the patch). * libio/libio.h [_IO_MTSAFE_IO]: Remove include of <bits/stdio-lock.h> and commented-out include of <comthread.h>. * include/libio.h [!_ISOMAC && _IO_MTSAFE_IO]: Include <bits/stdio-lock.h>. * stdio-common/scanf15.c (_IO_MTSAFE_IO): Undefine. * stdio-common/scanf17.c (_IO_MTSAFE_IO): Likewise.
2009-07-29Preserve SSE registers in runtime relocations on x86-64.Ulrich Drepper
SSE registers are used for passing parameters and must be preserved in runtime relocations. This is inside ld.so enforced through the tests in tst-xmmymm.sh. But the malloc routines used after startup come from libc.so and can be arbitrarily complex. It's overkill to save the SSE registers all the time because of that. These calls are rare. Instead we save them on demand. The new infrastructure put in place in this patch makes this possible and efficient.
2008-05-24* libio/stdio.h (vscanf): Fix -std=c99 redirect. Jakub Jelinek
* stdio-common/Makefile (tests): Add scanf16 and scanf17. (CFLAGS-scanf17.c): New. * stdio-common/scanf14.c (main): Add fscanf and scanf tests. * stdio-common/scanf15.c (main): Likewise. * stdio-common/scanf16.c: New test. * stdio-common/scanf17.c: New test. 2008-05-24 Jakub Jelinek <jakub@redhat.com> * libio/stdio.h (vscanf): Fix -std=c99 redirect. * stdio-common/Makefile (tests): Add scanf16 and scanf17. (CFLAGS-scanf17.c): New. * stdio-common/scanf14.c (main): Add fscanf and scanf tests. * stdio-common/scanf15.c (main): Likewise. * stdio-common/scanf16.c: New test. * stdio-common/scanf17.c: New test.