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101 lines
2.6 KiB
Plaintext
101 lines
2.6 KiB
Plaintext
Description:
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A simplified variant of GNU libsigsegv.
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It implements the most important features of GNU libsigsegv: catching SIGSEGV
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and catching stack overflow. It does *not* implement the 'sigsegv_dispatcher'
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type (which is not multithread-safe).
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It supports all modern Unix-like platforms: Linux, Hurd, FreeBSD, NetBSD,
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OpenBSD, macOS, AIX, Solaris, Cygwin, Haiku. It does *not* support HP-UX, Minix,
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native Windows; on these platforms the module compiles and provides a
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<sigsegv.h> header file, but it does not define HAVE_SIGSEGV_RECOVERY and
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HAVE_STACK_OVERFLOW_RECOVERY.
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Unlike GNU libsigsegv, which consists of many .h and .c files, this module
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compiles to just two object files, rather than a library.
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Files:
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lib/sigsegv.in.h
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lib/sigsegv.c
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lib/stackvma.h
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lib/stackvma.c
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m4/mmap-anon.m4
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m4/musl.m4
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m4/sigaltstack.m4
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m4/stack-direction.m4
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m4/libsigsegv.m4
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m4/sigsegv.m4
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Depends-on:
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gen-header
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havelib
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host-cpu-c-abi
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stdint-h
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getpagesize
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configure.ac:
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AC_REQUIRE([gl_SIGSEGV])
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if test $gl_sigsegv_uses_libsigsegv = yes; then
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GL_GENERATE_SIGSEGV_H=false
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else
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GL_GENERATE_SIGSEGV_H=true
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fi
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gl_CONDITIONAL_HEADER([sigsegv.h])
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AC_PROG_MKDIR_P
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if $GL_GENERATE_SIGSEGV_H; then
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dnl Persuade glibc <sys/ucontext.h> to declare macros designating register
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dnl indices: REG_RSP on x86_64, REG_ESP on i386.
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dnl Persuade Solaris OpenIndiana <ucontext.h> to include <sys/regset.h>,
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dnl which declares macros designating register indices, such as ESP on i386.
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dnl Persuade Solaris OpenIndiana <unistd.h> to declare mincore().
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AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
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gl_MUSL_LIBC
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AC_REQUIRE([AC_CANONICAL_HOST])
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case "$host_os" in
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solaris2.11)
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AC_DEFINE([SOLARIS11], [1], [Define on Solaris 11 and its derivates.])
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;;
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esac
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gl_FUNC_MMAP_ANON
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dnl Stack direction.
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SV_STACK_DIRECTION
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dnl Catching stack overflow requires an alternate signal stack.
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dnl The old "install a guard page" trick would be unreliable, because
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dnl we don't know where exactly to place the guard page.
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SV_SIGALTSTACK
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AC_CHECK_FUNCS_ONCE([getrlimit])
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fi
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Makefile.am:
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BUILT_SOURCES += $(SIGSEGV_H)
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if GL_GENERATE_SIGSEGV_H
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sigsegv.h: sigsegv.in.h $(top_builddir)/config.status
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@NMD@ $(AM_V_GEN)$(MKDIR_P) '%reldir%'
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$(gl_V_at)$(SED_HEADER_TO_AT_t) $(srcdir)/sigsegv.in.h
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$(AM_V_at)mv $@-t $@
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else
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sigsegv.h: $(top_builddir)/config.status
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rm -f $@
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endif
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MOSTLYCLEANFILES += sigsegv.h sigsegv.h-t
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if GL_GENERATE_SIGSEGV_H
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lib_SOURCES += sigsegv.c stackvma.c
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endif
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Include:
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<sigsegv.h>
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Link:
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$(LTLIBSIGSEGV) when linking with libtool, $(LIBSIGSEGV) otherwise
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License:
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GPLv2+
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Maintainer:
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Bruno Haible
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