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Correct cycle detection during dependency sorting
This commit is contained in:
Andreas Schwab
Ulrich Drepper
parent
91b392a4ba
commit
e888bcbe4f
15
ChangeLog
15
ChangeLog
@ -1,3 +1,18 @@
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2011-08-16 Andreas Schwab <schwab@redhat.com>
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[BZ #11724]
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* elf/dl-deps.c (_dl_map_object_deps): Only assume cycle when
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object is seen twice.
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* elf/dl-fini.c (_dl_sort_fini): Likewise.
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* elf/Makefile (distribute): Add tst-initorder2.c.
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(tests): Add tst-initorder2.
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(modules-names): Add tst-initorder2a tst-initorder2b
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tst-initorder2c tst-initorder2d. Add rules to build them.
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($(objpfx)tst-initorder2.out): New rule.
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* elf/tst-initorder2.c: New file.
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* elf/tst-initorder2.exp: New file.
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2011-08-21 Ulrich Drepper <drepper@gmail.com>
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* sysdeps/unix/sysv/linux/x86_64/gettimeofday.S: Removed.
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29
elf/Makefile
29
elf/Makefile
@ -120,9 +120,10 @@ distribute := rtld-Rules \
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ifuncmain7pie.c ifuncmain7static.c \
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tst-unique1.c tst-unique1mod1.c tst-unique1mod2.c \
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tst-unique2.c tst-unique2mod1.c tst-unique2mod2.c \
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tst-initordera1.c tst-initordera2.c tst-initorderb1.c \
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tst-initorderb2.c tst-initordera3.c tst-initordera4.c \
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tst-initorder.c
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tst-initordera1.c tst-initordera2.c tst-initorderb1.c \
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tst-initorderb2.c tst-initordera3.c tst-initordera4.c \
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tst-initorder.c \
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tst-initorder2.c
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CFLAGS-dl-runtime.c = -fexceptions -fasynchronous-unwind-tables
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CFLAGS-dl-lookup.c = -fexceptions -fasynchronous-unwind-tables
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@ -227,7 +228,7 @@ tests += loadtest restest1 preloadtest loadfail multiload origtest resolvfail \
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tst-audit1 tst-audit2 \
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tst-stackguard1 tst-addr1 tst-thrlock \
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tst-unique1 tst-unique2 tst-unique3 tst-unique4 \
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tst-initorder
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tst-initorder tst-initorder2
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# reldep9
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test-srcs = tst-pathopt
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selinux-enabled := $(shell cat /selinux/enforce 2> /dev/null)
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@ -288,7 +289,8 @@ modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \
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tst-unique4lib \
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tst-initordera1 tst-initorderb1 \
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tst-initordera2 tst-initorderb2 \
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tst-initordera3 tst-initordera4
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tst-initordera3 tst-initordera4 \
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tst-initorder2a tst-initorder2b tst-initorder2c tst-initorder2d
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ifeq (yes,$(have-initfini-array))
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modules-names += tst-array2dep tst-array5dep
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endif
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@ -1157,6 +1159,23 @@ $(objpfx)tst-initorder.out: $(objpfx)tst-initorder
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$< > $@
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cmp $@ tst-initorder.exp > /dev/null
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$(objpfx)tst-initorder2: $(objpfx)tst-initorder2a.so $(objpfx)tst-initorder2d.so $(objpfx)tst-initorder2c.so
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$(objpfx)tst-initorder2a.so: $(objpfx)tst-initorder2b.so
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$(objpfx)tst-initorder2b.so: $(objpfx)tst-initorder2c.so
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$(objpfx)tst-initorder2c.so: $(objpfx)tst-initorder2d.so
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define o-iterator-doit
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$(objpfx)tst-initorder2$o.os: tst-initorder2.c; \
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$$(compile-command.c) -DNAME=\"$o\"
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endef
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object-suffixes-left := a b c d
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include $(o-iterator)
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$(objpfx)tst-initorder2.out: $(objpfx)tst-initorder2
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$(elf-objpfx)${rtld-installed-name} \
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--library-path $(rpath-link)$(patsubst %,:%,$(sysdep-library-path)) \
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$< > $@
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cmp $@ tst-initorder2.exp > /dev/null
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ifeq (yes,$(config-cflags-avx))
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AVX-CFLAGS=-mavx
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ifeq (yes,$(config-cflags-novzeroupper))
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@ -626,12 +626,12 @@ Filters not supported with LD_TRACE_PRELINKING"));
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/* We can skip looking for the binary itself which is at the front
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of the search list. */
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i = 1;
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bool seen[nlist];
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memset (seen, false, nlist * sizeof (seen[0]));
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char seen[nlist];
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memset (seen, 0, nlist * sizeof (seen[0]));
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while (1)
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{
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/* Keep track of which object we looked at this round. */
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seen[i] = true;
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seen[i] += seen[i] < 2;
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struct link_map *thisp = l_initfini[i];
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/* Find the last object in the list for which the current one is
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@ -652,15 +652,16 @@ Filters not supported with LD_TRACE_PRELINKING"));
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(k - i) * sizeof (l_initfini[0]));
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l_initfini[k] = thisp;
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if (seen[i + 1])
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if (seen[i + 1] > 1)
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{
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++i;
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goto next_clear;
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}
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char this_seen = seen[i];
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memmove (&seen[i], &seen[i + 1],
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(k - i) * sizeof (seen[0]));
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seen[k] = true;
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seen[k] = this_seen;
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goto next;
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}
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@ -671,7 +672,7 @@ Filters not supported with LD_TRACE_PRELINKING"));
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if (++i == nlist)
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break;
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next_clear:
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memset (&seen[i], false, (nlist - i) * sizeof (seen[0]));
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memset (&seen[i], 0, (nlist - i) * sizeof (seen[0]));
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next:;
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}
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@ -39,12 +39,12 @@ _dl_sort_fini (struct link_map **maps, size_t nmaps, char *used, Lmid_t ns)
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/* We can skip looking for the binary itself which is at the front
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of the search list for the main namespace. */
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unsigned int i = ns == LM_ID_BASE;
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bool seen[nmaps];
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memset (seen, false, nmaps * sizeof (seen[0]));
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char seen[nmaps];
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memset (seen, 0, nmaps * sizeof (seen[0]));
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while (1)
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{
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/* Keep track of which object we looked at this round. */
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seen[i] = true;
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seen[i] += seen[i] < 2;
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struct link_map *thisp = maps[i];
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/* Do not handle ld.so in secondary namespaces and object which
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@ -79,14 +79,15 @@ _dl_sort_fini (struct link_map **maps, size_t nmaps, char *used, Lmid_t ns)
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used[k] = here_used;
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}
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if (seen[i + 1])
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if (seen[i + 1] > 1)
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{
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++i;
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goto next_clear;
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}
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char this_seen = seen[i];
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memmove (&seen[i], &seen[i + 1], (k - i) * sizeof (seen[0]));
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seen[k] = true;
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seen[k] = this_seen;
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goto next;
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}
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@ -96,7 +97,7 @@ _dl_sort_fini (struct link_map **maps, size_t nmaps, char *used, Lmid_t ns)
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unsigned int m = maps[k]->l_reldeps->act;
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struct link_map **relmaps = &maps[k]->l_reldeps->list[0];
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/* Look through the relocation dependencies of the object. */
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/* Look through the relocation dependencies of the object. */
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while (m-- > 0)
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if (__builtin_expect (relmaps[m] == thisp, 0))
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goto move;
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@ -109,7 +110,7 @@ _dl_sort_fini (struct link_map **maps, size_t nmaps, char *used, Lmid_t ns)
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if (++i == nmaps)
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break;
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next_clear:
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memset (&seen[i], false, (nmaps - i) * sizeof (seen[0]));
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memset (&seen[i], 0, (nmaps - i) * sizeof (seen[0]));
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next:;
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}
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20
elf/tst-initorder2.c
Normal file
20
elf/tst-initorder2.c
Normal file
@ -0,0 +1,20 @@
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#include <stdio.h>
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#ifndef NAME
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int
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main (void)
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{
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puts ("main");
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}
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#else
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static void __attribute__ ((constructor))
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init (void)
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{
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puts ("init: " NAME);
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}
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static void __attribute__ ((destructor))
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fini (void)
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{
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puts ("fini: " NAME);
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}
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#endif
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9
elf/tst-initorder2.exp
Normal file
9
elf/tst-initorder2.exp
Normal file
@ -0,0 +1,9 @@
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init: d
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init: c
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init: b
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init: a
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main
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fini: a
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fini: b
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fini: c
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fini: d
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