41da295eb5
If a client passes a section of memory via file descriptor and then subsequently truncates that file, the underlying pages will be freed and the addresses invalidated. Subsequent accesses to the page will fail with a SIGBUS error. Trap that SIGBUS, figure out which segment was causing the error and then allocate new pages to fill in for that region. Mark the offending shared segment as invalid and free the resource ID so that the client will be able to tell when subsequently attempting to use the segment. Signed-off-by: Keith Packard <keithp@keithp.com> v2: Use MAP_FIXED to simplify the recovery logic (Mark Kettenis) v3: Also catch errors in ShmCreateSegment Conflicts: include/dix-config.h.in include/xorg-config.h.in
60 lines
1.1 KiB
Makefile
60 lines
1.1 KiB
Makefile
noinst_LTLIBRARIES = libos.la
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AM_CFLAGS = $(DIX_CFLAGS) $(SHA1_CFLAGS)
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SECURERPC_SRCS = rpcauth.c
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XDMCP_SRCS = xdmcp.c
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XORG_SRCS = log.c
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BUSFAULT_SRCS = busfault.c
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libos_la_SOURCES = \
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WaitFor.c \
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access.c \
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auth.c \
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backtrace.c \
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client.c \
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connection.c \
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io.c \
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mitauth.c \
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oscolor.c \
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osdep.h \
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osinit.c \
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utils.c \
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xdmauth.c \
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xsha1.c \
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xstrans.c \
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xprintf.c \
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$(XORG_SRCS)
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libos_la_LIBADD = @SHA1_LIBS@ $(DLOPEN_LIBS) $(LTLIBOBJS)
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if SECURE_RPC
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libos_la_SOURCES += $(SECURERPC_SRCS)
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endif
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if XDMCP
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libos_la_SOURCES += $(XDMCP_SRCS)
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endif
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if HAVE_LIBUNWIND
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AM_CFLAGS += $(LIBUNWIND_CFLAGS)
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libos_la_LIBADD += $(LIBUNWIND_LIBS)
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endif
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if BUSFAULT
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libos_la_SOURCES += $(BUSFAULT_SRCS)
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endif
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EXTRA_DIST = $(SECURERPC_SRCS) $(XDMCP_SRCS)
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if SPECIAL_DTRACE_OBJECTS
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# Generate dtrace object code for probes in libos & libdix
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dtrace.o: $(top_srcdir)/dix/Xserver.d $(am_libos_la_OBJECTS)
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$(AM_V_GEN)$(DTRACE) -G -C -o $@ -s $(top_srcdir)/dix/Xserver.d .libs/*.o ../dix/.libs/*.o
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noinst_PROGRAMS = os.O
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os_O_SOURCES =
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os.O: dtrace.o $(am_libos_la_OBJECTS)
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$(AM_V_GEN)ld -r -o $@ dtrace.o .libs/*.o
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endif
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