path: root/test/nptl/
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authorWaldemar Brodkorb <>2016-01-03 18:44:54 (GMT)
committerWaldemar Brodkorb <>2016-01-06 22:54:38 (GMT)
commitd41cec56d5c04d88aa2d06986b692cd1fa279748 (patch)
tree0ae2816dabaff91329d1e51f1f234fc8ead55174 /test/nptl/
parent7b495396fbf7bf604939d8150955ce891f7e8ccd (diff)
pthread_atfork handlers not removed during dlclose
Invoke pthread_atfork handler cleanup when removing the associated DSO... If a program loads a DSO (dlopen) that sets up a pthread_atfork handler(s), and then subsequently closes the DSO, the handler(s) are left in place. If fork() is subsequently called, the handlers are invoked even though the DSO has been removed causing crashes or unpredictable code execution. This is because the code in __cxa_finalize(atexit.c)to invoke the unregister_atfork() routine is ifdef'd out with the comment that it hasn't been "looked into this yet...". Refs.: Add test-case, enable cleanup for NPTL only. Signed-off-by: John Ata <> Signed-off-by: Leonid Lisovskiy <>
Diffstat (limited to 'test/nptl/')
1 files changed, 7 insertions, 1 deletions
diff --git a/test/nptl/ b/test/nptl/
index 09e2804..ac2aa8b 100644
--- a/test/nptl/
+++ b/test/nptl/
@@ -42,7 +42,8 @@ TESTS := tst-align tst-align2 tst-atfork1 tst-attr1 tst-attr2 tst-attr3 \
tst-oddstacklimit tst-oncex3 tst-oncex4 tst-rwlock2a \
tst-basic7 tst-signal7 tst-vfork1x tst-vfork2x tst-sem10 tst-sem11 \
tst-sem12 tst-typesizes tst-initializers1-c89 tst-initializers1-c99 \
- tst-initializers1-gnu89 tst-initializers1-gnu99
+ tst-initializers1-gnu89 tst-initializers1-gnu99 \
+ tst-atfork2
# These are for the RT library and POSIX timers.
@@ -151,6 +152,8 @@ CFLAGS_tst-initializers1-gnu99 = $(CFLAGS-tst-initializers1) -std=gnu99
EXTRA_LDFLAGS = $(if $(findstring -lpthread,$(LDFLAGS_$@)),,-lpthread)
+LDFLAGS_tst-atfork2 := -ldl := -shared -static-libgcc -lpthread
LDFLAGS_tst-cleanup4 := tst-cleanup4aux.o
LDFLAGS_tst-cleanupx4 := tst-cleanup4aux.o
LDFLAGS_tst-clock2 := -lrt
@@ -207,6 +210,9 @@ tst-tls5:
tst-cleanupx4 : tst-cleanup4aux.o
OPTS_tst-cancel7 = -c ./tst-cancel7
OPTS_tst-mqueue7 = -- ./tst-mqueue7
OPTS_tst-exec4 = ./tst-exec4