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| author | H.J. Lu <hjl.tools@gmail.com> | 2017-11-09 05:09:49 -0800 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2017-11-09 05:10:03 -0800 |
| commit | 8cb5295d3f642af43694ba39bc56c8575380aeb3 (patch) | |
| tree | 5e8f1ad564128af0daaeb9d54b8b1ce439fab9e4 /include/setjmp.h | |
| parent | 3683b423a4895ecd360fbbe118a027b7c2cf52ec (diff) | |
| download | glibc-8cb5295d3f642af43694ba39bc56c8575380aeb3.tar.gz glibc-8cb5295d3f642af43694ba39bc56c8575380aeb3.tar.xz glibc-8cb5295d3f642af43694ba39bc56c8575380aeb3.zip | |
Add jmp_buf-macros.h
Verify that sizes, alignments and field offsets of jmp_buf as well as sigjmp_buf are unchanged regardless how struct __jmp_buf_tag is defined. Since jmp_buf is target specific, jmp_buf-macros.h is added for each Linux target. A new target must provides its own jmp_buf-macros.h. TODO: Hurd needs to provide a jmp_buf-macros.h. Tested with build-many-glibcs.py. * include/setjmp.h [!_ISOMAC]: Include <stddef.h> and <jmp_buf-macros.h>. [!_ISOMAC] (STR_HELPER): New. [!_ISOMAC] (STR): Likewise. [!_ISOMAC] (TEST_SIZE): Likewise. [!_ISOMAC] (TEST_ALIGN): Likewise. [!_ISOMAC] (TEST_OFFSET): Likewise. [!_ISOMAC] Add _Static_assert to check sizes, alignments and field offsets of jmp_buf as well as sigjmp_buf. * sysdeps/unix/sysv/linux/aarch64/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/alpha/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/arm/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/hppa/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/i386/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/ia64/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/m68k/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/microblaze/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n32/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n64/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/nios2/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/sh/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/jmp_buf-macros.h: Likewise.
Diffstat (limited to 'include/setjmp.h')
| -rw-r--r-- | include/setjmp.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/include/setjmp.h b/include/setjmp.h index c234287515..f1b19f5ceb 100644 --- a/include/setjmp.h +++ b/include/setjmp.h @@ -31,6 +31,40 @@ libc_hidden_proto (__sigsetjmp) # if IS_IN (rtld) && !defined NO_RTLD_HIDDEN extern __typeof (__sigsetjmp) __sigsetjmp attribute_hidden; # endif + +/* Check jmp_buf sizes, alignments and offsets. */ +# include <stddef.h> +# include <jmp_buf-macros.h> + +# define STR_HELPER(x) #x +# define STR(x) STR_HELPER(x) + +# define TEST_SIZE(type, size) \ + _Static_assert (sizeof (type) == size, \ + "size of " #type " != " \ + STR (size)) +# define TEST_ALIGN(type, align) \ + _Static_assert (__alignof__ (type) == align , \ + "align of " #type " != " \ + STR (align)) +# define TEST_OFFSET(type, member, offset) \ + _Static_assert (offsetof (type, member) == offset, \ + "offset of " #member " field of " #type " != " \ + STR (offset)) + +/* Check if jmp_buf have the expected sizes. */ +TEST_SIZE (jmp_buf, JMP_BUF_SIZE); +TEST_SIZE (sigjmp_buf, SIGJMP_BUF_SIZE); + +/* Check if jmp_buf have the expected alignments. */ +TEST_ALIGN (jmp_buf, JMP_BUF_ALIGN); +TEST_ALIGN (sigjmp_buf, SIGJMP_BUF_ALIGN); + +/* Check if internal fields in jmp_buf have the expected offsets. */ +TEST_OFFSET (struct __jmp_buf_tag, __mask_was_saved, + MASK_WAS_SAVED_OFFSET); +TEST_OFFSET (struct __jmp_buf_tag, __saved_mask, + SAVED_MASK_OFFSET); #endif #endif |