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authorUlrich Drepper <drepper@redhat.com>2000-06-10 04:31:24 +0000
committerUlrich Drepper <drepper@redhat.com>2000-06-10 04:31:24 +0000
commitd743ba1e9bf45b532c18ea437476984c0e2f0c44 (patch)
tree9424ee47f86f76054b196634ca1bafc2745f1fa0 /dlfcn
parent04470dc03e2d56b1acc0c152d9ad50bdf1066bfa (diff)
downloadglibc-d743ba1e9bf45b532c18ea437476984c0e2f0c44.tar.gz
Update.
2000-06-09 H.J. Lu <hjl@gnu.org> * dlfcn/dlerror.c (_dlerror_run): Set result->errstring to NULL after freeing it. * dlfcn/Makefile (distribute): Add failtestmod.c. (tests): Add failtest. Add rules to build and run failtest. * dlfcn/failtest.c: New file. * dlfcn/failtestmod.c: New file.
Diffstat (limited to 'dlfcn')
-rw-r--r--dlfcn/Makefile9
-rw-r--r--dlfcn/dlerror.c9
-rw-r--r--dlfcn/failtest.c58
-rw-r--r--dlfcn/failtestmod.c25
4 files changed, 95 insertions, 6 deletions
diff --git a/dlfcn/Makefile b/dlfcn/Makefile
index d14d382702..ed725639ef 100644
--- a/dlfcn/Makefile
+++ b/dlfcn/Makefile
@@ -20,7 +20,7 @@ subdir := dlfcn
headers := bits/dlfcn.h dlfcn.h
extra-libs := libdl
libdl-routines := dlopen dlclose dlsym dlvsym dlerror dladdr
-distribute := dlopenold.c glreflib1.c glreflib2.c
+distribute := dlopenold.c glreflib1.c glreflib2.c failtestmod.c
extra-libs-others := libdl
@@ -32,9 +32,9 @@ libdl-shared-only-routines := dlopenold
endif
ifeq (yes,$(build-shared))
-tests = glrefmain
+tests = glrefmain failtest
endif
-modules-names = glreflib1 glreflib2
+modules-names = glreflib1 glreflib2 failtestmod
extra-objs += $(modules-names:=.os)
include ../Rules
@@ -46,3 +46,6 @@ $(test-modules): $(objpfx)%.so: $(objpfx)%.os
$(objpfx)glrefmain: $(objpfx)libdl.so
$(objpfx)glrefmain.out: $(objpfx)glrefmain \
$(objpfx)glreflib1.so $(objpfx)glreflib2.so
+
+$(objpfx)failtest: $(libdl)
+$(objpfx)failtest.out: $(objpfx)failtestmod.so
diff --git a/dlfcn/dlerror.c b/dlfcn/dlerror.c
index 972a9ac263..34ea82907e 100644
--- a/dlfcn/dlerror.c
+++ b/dlfcn/dlerror.c
@@ -120,9 +120,12 @@ _dlerror_run (void (*operate) (void *), void *args)
}
if (result->errstring != NULL)
- /* Free the error string from the last failed command. This can
- happen if `dlerror' was not run after an error was found. */
- free ((char *) result->errstring);
+ {
+ /* Free the error string from the last failed command. This can
+ happen if `dlerror' was not run after an error was found. */
+ free ((char *) result->errstring);
+ result->errstring = NULL;
+ }
result->errcode = _dl_catch_error (&result->objname, &result->errstring,
operate, args);
diff --git a/dlfcn/failtest.c b/dlfcn/failtest.c
new file mode 100644
index 0000000000..50bbf10596
--- /dev/null
+++ b/dlfcn/failtest.c
@@ -0,0 +1,58 @@
+#include <dlfcn.h>
+#include <stdio.h>
+
+
+/* Number of rounds we perform the test. */
+#define TEST_ROUNDS 10
+
+
+static const char unknown[] = "a-file-with-this-name-does-not-exist";
+static const char exists[] = "failtestmod.so";
+
+
+int
+main (void)
+{
+ int i;
+
+ setvbuf (stdout, NULL, _IONBF, 0);
+
+ for (i = 0; i < TEST_ROUNDS; ++i)
+ {
+ void *dsc;
+
+ printf ("Round %d: Try loading \"%s\"\n", i, unknown);
+
+ dsc = dlopen (unknown, RTLD_NOW);
+ if (dsc != NULL)
+ {
+ printf ("We found a file of name \"%s\": this should not happen\n",
+ unknown);
+ return 1;
+ }
+
+ printf ("Round %d: loading \"%s\" failed\n", i, unknown);
+
+ /* Don't use `dlerror', just load an existing file. */
+ dsc = dlopen (exists, RTLD_NOW);
+ if (dsc == NULL)
+ {
+ printf ("Could not load \"%s\": %s\n", exists, dlerror ());
+ return 1;
+ }
+
+ printf ("Round %d: Loaded \"%s\"\n", i, exists);
+
+ dlclose (dsc);
+
+ printf ("Round %d: Unloaded \"%s\"\n", i, exists);
+ }
+
+ return 0;
+}
+
+
+void
+foo (void)
+{
+}
diff --git a/dlfcn/failtestmod.c b/dlfcn/failtestmod.c
new file mode 100644
index 0000000000..595da4d567
--- /dev/null
+++ b/dlfcn/failtestmod.c
@@ -0,0 +1,25 @@
+#include <dlfcn.h>
+#include <stdio.h>
+
+
+void
+__attribute__ ((__constructor__))
+constr (void)
+{
+ void *handle;
+ void *m;
+
+ /* Open the library. */
+ handle = dlopen (NULL, RTLD_NOW);
+ if (handle == NULL)
+ {
+ puts ("Cannot get handle to own object");
+ return;
+ }
+
+ /* Get a symbol. */
+ m = dlsym (handle, "main");
+ puts ("called dlsym() to get main");
+
+ dlclose (handle);
+}