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181 lines
6.1 KiB
181 lines
6.1 KiB
# |
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# Patch provided by Ulrich Drepper in BZ#919562. |
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# |
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# Patch has not been sent upstream. |
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# |
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# 2013-03-08 Ulrich Drepper <drepper@gmail.com> |
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# |
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# * elf/rtld.c (dl_main): Correctly determine when the application |
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# required DSOs with TLS and bump the generation counter in that |
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# case. The current condition does not account for an audit |
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# module using TLS. |
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# * elf/dl-tls.c (_dl_count_modids): New function. |
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# (_dl_allocate_tls_init): Add assertion to check TLS |
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# generation. |
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# * sysdeps/generic/ldsodefs.h: Declare _dl_count_modids. |
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# * elf/Makefile: Add rules to build and run tst-audit9. |
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# * elf/tst-audit9.c: New file. |
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# * elf/tst-auditmod9a.c: New file. |
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# * elf/tst-auditmod9b.c: New file. |
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# |
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diff -urN glibc-2.17-c758a686/elf/dl-tls.c glibc-2.17-c758a686/elf/dl-tls.c |
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--- glibc-2.17-c758a686/elf/dl-tls.c 2013-04-24 16:06:10.410756438 -0400 |
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+++ glibc-2.17-c758a686/elf/dl-tls.c 2013-04-24 16:06:49.092604707 -0400 |
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@@ -109,6 +109,28 @@ |
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} |
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+size_t |
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+internal_function |
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+_dl_count_modids (void) |
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+{ |
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+ if (! __builtin_expect (GL(dl_tls_dtv_gaps), true)) |
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+ return GL(dl_tls_max_dtv_idx); |
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+ |
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+ size_t n = 0; |
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+ struct dtv_slotinfo_list *runp = GL(dl_tls_dtv_slotinfo_list); |
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+ while (runp != NULL) |
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+ { |
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+ for (size_t i = 0; i < runp->len; ++i) |
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+ if (runp->slotinfo[i].map != NULL) |
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+ ++n; |
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+ |
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+ runp = runp->next; |
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+ } |
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+ |
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+ return n; |
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+} |
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+ |
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+ |
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#ifdef SHARED |
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void |
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internal_function |
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@@ -411,6 +433,7 @@ |
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/* Keep track of the maximum generation number. This might |
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not be the generation counter. */ |
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+ assert (listp->slotinfo[cnt].gen <= GL(dl_tls_generation)); |
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maxgen = MAX (maxgen, listp->slotinfo[cnt].gen); |
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if (map->l_tls_offset == NO_TLS_OFFSET |
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diff -urN glibc-2.17-c758a686/elf/Makefile glibc-2.17-c758a686/elf/Makefile |
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--- glibc-2.17-c758a686/elf/Makefile 2013-04-24 16:06:10.408756448 -0400 |
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+++ glibc-2.17-c758a686/elf/Makefile 2013-04-24 16:07:29.475457962 -0400 |
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@@ -198,7 +200,7 @@ |
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tst-dlmodcount tst-dlopenrpath tst-deep1 \ |
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tst-dlmopen1 tst-dlmopen2 tst-dlmopen3 \ |
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unload3 unload4 unload5 unload6 unload7 unload8 tst-global1 order2 \ |
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- tst-audit1 tst-audit2 tst-audit8 \ |
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+ tst-audit1 tst-audit2 tst-audit8 tst-audit9 \ |
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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 tst-initorder2 tst-relsort1 |
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@@ -251,7 +253,8 @@ |
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unload8mod1 unload8mod1x unload8mod2 unload8mod3 \ |
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order2mod1 order2mod2 order2mod3 order2mod4 \ |
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tst-unique1mod1 tst-unique1mod2 \ |
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- tst-unique2mod1 tst-unique2mod2 \ |
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+ tst-unique2mod1 tst-unique2mod2 \ |
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+ tst-auditmod9a tst-auditmod9b \ |
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tst-unique3lib tst-unique3lib2 \ |
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tst-unique4lib \ |
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tst-initordera1 tst-initorderb1 \ |
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@@ -574,6 +577,8 @@ |
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ifuncmod1.so-no-z-defs = yes |
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ifuncmod5.so-no-z-defs = yes |
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ifuncmod6.so-no-z-defs = yes |
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+tst-auditmod9a.so-no-z-defs = yes |
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+tst-auditmod9b.so-no-z-defs = yes |
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ifeq ($(build-shared),yes) |
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# Build all the modules even when not actually running test programs. |
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@@ -1015,6 +1020,10 @@ |
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$(objpfx)tst-audit7.out: $(objpfx)tst-auditmod7b.so |
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tst-audit7-ENV = LD_AUDIT=$(objpfx)tst-auditmod7b.so |
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+$(objpfx)tst-audit9: $(libdl) |
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+$(objpfx)tst-audit9.out: $(objpfx)tst-auditmod9a.so $(objpfx)tst-auditmod9b.so |
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+tst-audit9-ENV = LD_AUDIT=$(objpfx)tst-auditmod9a.so |
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+ |
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$(objpfx)tst-audit8: $(common-objpfx)math/libm.so |
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$(objpfx)tst-audit8.out: $(objpfx)tst-auditmod1.so |
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tst-audit8-ENV = LD_AUDIT=$(objpfx)tst-auditmod1.so |
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diff -urN glibc-2.17-c758a686/elf/rtld.c glibc-2.17-c758a686/elf/rtld.c |
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--- glibc-2.17-c758a686/elf/rtld.c 2013-04-24 16:06:10.410756438 -0400 |
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+++ glibc-2.17-c758a686/elf/rtld.c 2013-04-24 16:06:49.096604693 -0400 |
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@@ -1637,6 +1637,10 @@ |
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} |
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} |
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+ /* Keep track of the currently loaded modules to count how many |
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+ non-audit modules which use TLS are loaded. */ |
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+ size_t count_modids = _dl_count_modids (); |
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+ |
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/* Set up debugging before the debugger is notified for the first time. */ |
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#ifdef ELF_MACHINE_DEBUG_SETUP |
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/* Some machines (e.g. MIPS) don't use DT_DEBUG in this way. */ |
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@@ -2281,7 +2285,8 @@ |
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# define NONTLS_INIT_TP do { } while (0) |
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#endif |
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- if (!was_tls_init_tp_called && GL(dl_tls_max_dtv_idx) > 0) |
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+ if ((!was_tls_init_tp_called && GL(dl_tls_max_dtv_idx) > 0) |
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+ || count_modids != _dl_count_modids ()) |
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++GL(dl_tls_generation); |
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/* Now that we have completed relocation, the initializer data |
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diff -urN glibc-2.17-c758a686/elf/tst-audit9.c glibc-2.17-c758a686/elf/tst-audit9.c |
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--- glibc-2.17-c758a686/elf/tst-audit9.c 1969-12-31 19:00:00.000000000 -0500 |
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+++ glibc-2.17-c758a686/elf/tst-audit9.c 2013-04-24 16:06:49.096604693 -0400 |
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@@ -0,0 +1,8 @@ |
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+#include <dlfcn.h> |
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+ |
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+int main(void) |
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+{ |
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+ void *h = dlopen("$ORIGIN/tst-auditmod9b.so", RTLD_LAZY); |
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+ int (*fp)(void) = dlsym(h, "f"); |
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+ return fp() - 1; |
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+} |
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diff -urN glibc-2.17-c758a686/elf/tst-auditmod9a.c glibc-2.17-c758a686/elf/tst-auditmod9a.c |
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--- glibc-2.17-c758a686/elf/tst-auditmod9a.c 1969-12-31 19:00:00.000000000 -0500 |
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+++ glibc-2.17-c758a686/elf/tst-auditmod9a.c 2013-04-24 16:06:49.097604689 -0400 |
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@@ -0,0 +1,16 @@ |
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+#include <stdint.h> |
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+ |
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+__thread int var; |
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+ |
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+unsigned int |
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+la_version (unsigned int v) |
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+{ |
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+ return v; |
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+} |
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+ |
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+void |
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+la_activity (uintptr_t *cookie, unsigned int flag) |
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+{ |
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+ ++var; |
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+} |
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+ |
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diff -urN glibc-2.17-c758a686/elf/tst-auditmod9b.c glibc-2.17-c758a686/elf/tst-auditmod9b.c |
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--- glibc-2.17-c758a686/elf/tst-auditmod9b.c 1969-12-31 19:00:00.000000000 -0500 |
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+++ glibc-2.17-c758a686/elf/tst-auditmod9b.c 2013-04-24 16:06:49.097604689 -0400 |
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@@ -0,0 +1,6 @@ |
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+__thread int a; |
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+ |
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+int f(void) |
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+{ |
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+ return ++a; |
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+} |
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diff -urN glibc-2.17-c758a686/sysdeps/generic/ldsodefs.h glibc-2.17-c758a686/sysdeps/generic/ldsodefs.h |
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--- glibc-2.17-c758a686/sysdeps/generic/ldsodefs.h 2013-04-24 16:06:10.545755798 -0400 |
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+++ glibc-2.17-c758a686/sysdeps/generic/ldsodefs.h 2013-04-24 16:06:49.098604686 -0400 |
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@@ -1031,6 +1031,9 @@ |
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/* Determine next available module ID. */ |
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extern size_t _dl_next_tls_modid (void) internal_function attribute_hidden; |
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+/* Count the modules with TLS segments. */ |
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+extern size_t _dl_count_modids (void) internal_function attribute_hidden; |
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+ |
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/* Calculate offset of the TLS blocks in the static TLS block. */ |
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extern void _dl_determine_tlsoffset (void) internal_function attribute_hidden; |
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