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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.
71 lines
2.2 KiB
C
71 lines
2.2 KiB
C
#ifndef _SETJMP_H
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#include <setjmp/setjmp.h>
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#ifndef _ISOMAC
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/* Now define the internal interfaces. */
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/* Internal machine-dependent function to restore context sans signal mask. */
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extern void __longjmp (__jmp_buf __env, int __val)
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__attribute__ ((__noreturn__)) attribute_hidden;
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extern void ____longjmp_chk (__jmp_buf __env, int __val)
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__attribute__ ((__noreturn__)) attribute_hidden;
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/* Internal function to possibly save the current mask of blocked signals
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in ENV, and always set the flag saying whether or not it was saved.
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This is used by the machine-dependent definition of `__sigsetjmp'.
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Always returns zero, for convenience. */
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extern int __sigjmp_save (jmp_buf __env, int __savemask);
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extern void _longjmp_unwind (jmp_buf env, int val);
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extern void __libc_siglongjmp (sigjmp_buf env, int val)
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__attribute__ ((noreturn));
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extern void __libc_longjmp (sigjmp_buf env, int val)
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__attribute__ ((noreturn));
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libc_hidden_proto (__libc_longjmp)
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libc_hidden_proto (_setjmp)
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libc_hidden_proto (__sigsetjmp)
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# if IS_IN (rtld) && !defined NO_RTLD_HIDDEN
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extern __typeof (__sigsetjmp) __sigsetjmp attribute_hidden;
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# endif
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/* Check jmp_buf sizes, alignments and offsets. */
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# include <stddef.h>
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# include <jmp_buf-macros.h>
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# define STR_HELPER(x) #x
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# define STR(x) STR_HELPER(x)
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# define TEST_SIZE(type, size) \
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_Static_assert (sizeof (type) == size, \
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"size of " #type " != " \
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STR (size))
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# define TEST_ALIGN(type, align) \
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_Static_assert (__alignof__ (type) == align , \
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"align of " #type " != " \
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STR (align))
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# define TEST_OFFSET(type, member, offset) \
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_Static_assert (offsetof (type, member) == offset, \
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"offset of " #member " field of " #type " != " \
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STR (offset))
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/* Check if jmp_buf have the expected sizes. */
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TEST_SIZE (jmp_buf, JMP_BUF_SIZE);
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TEST_SIZE (sigjmp_buf, SIGJMP_BUF_SIZE);
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/* Check if jmp_buf have the expected alignments. */
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TEST_ALIGN (jmp_buf, JMP_BUF_ALIGN);
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TEST_ALIGN (sigjmp_buf, SIGJMP_BUF_ALIGN);
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/* Check if internal fields in jmp_buf have the expected offsets. */
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TEST_OFFSET (struct __jmp_buf_tag, __mask_was_saved,
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MASK_WAS_SAVED_OFFSET);
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TEST_OFFSET (struct __jmp_buf_tag, __saved_mask,
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SAVED_MASK_OFFSET);
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#endif
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#endif
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