search for: dlclose

When valgrinding plugins, the following sequence can happen: plugin_free -> dlclose -> unloads the plugin and symbol table exit -> valgrind prints failures (the same applies to filters). When valgrind is printing the failures, it looks up the addresses in the symbol table, but that has been unloaded already so all you see are "???", resulting in useless...

...piler-rt/test/gcov (or gcda) to put my test case ? Guidance would be appreciated. Benoit ‹‹‹‹‹‹‹‹‹‹‹‹‹‹‹‹‹‹‹‹ See: https://llvm.org/bugs/show_bug.cgi?id=27224 Bug 27224 <https://llvm.org/bugs/show_bug.cgi?id=27224> - gcov / gcda-based profiling crashes when shared libraries are unloaded (dlclose()) I believe that GCDA profiling functions should be declared as hidden, i.e. symbols that are not exported by shared libraries. This would allow the GCDA based profiling to work correctly with code using dlopen/dlclose to load and unload shared libraries. Each shared library must have its own c...

On Sun, Jul 01, 2018 at 12:50:46PM +0100, Richard W.M. Jones wrote: > diff --git a/src/Makefile.am b/src/Makefile.am > index 7ead75c..915efe4 100644 > --- a/src/Makefile.am > +++ b/src/Makefile.am > @@ -63,7 +63,8 @@ nbdkit_CPPFLAGS = \ > nbdkit_CFLAGS = \ > -pthread \ > $(WARNINGS_CFLAGS) \ > - $(GNUTLS_CFLAGS) > + $(GNUTLS_CFLAGS) \ > + $(VALGRIND_CFLAGS)

OpenSSL 1.1 features a cleanup function that is automatically run on shutdown using atexit(3). This function frees all OpenSSL-allocated resources. In dovecot, OpenSSL is loaded indirectly using dlopen(3) against the relevant dovecot crypto module and is finally unloaded using dlclose(3). Until OpenSSL 1.0.1c this worked fine, however OpenSSL 1.0.1c makes sure[1] that the library stays loaded after the initial dlclose() so that the atexit(3) handlers can run on shutdown. This, together with the fact that dovecot uses custom allocation functions for OpenSSL and has already partia...

...lib conftest.c -lz -lnsl -lutil -lcrypto 1>&5 /opt/openssl/lib/libcrypto.a(dso_dlfcn.o): In function `dlfcn_load': dso_dlfcn.o(.text+0x8e): undefined reference to `dlopen' dso_dlfcn.o(.text+0xa4): undefined reference to `dlopen' dso_dlfcn.o(.text+0x10a): undefined reference to `dlclose' /opt/openssl/lib/libcrypto.a(dso_dlfcn.o): In function `dlfcn_unload': dso_dlfcn.o(.text+0x1d2): undefined reference to `dlclose' /opt/openssl/lib/libcrypto.a(dso_dlfcn.o): In function `dlfcn_bind_var': dso_dlfcn.o(.text+0x283): undefined reference to `dlsym' /opt/openssl/lib/...

...penbsd-compat -lresolv -lcrypto -lutil -lz -lnsl -lcrypt /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o)(.text+0x35): In function `dlfcn_load': : undefined reference to `dlopen' /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o)(.text+0x95): In function `dlfcn_load': : undefined reference to `dlclose' /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o)(.text+0xbc): In function `dlfcn_load': : undefined reference to `dlerror' /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o)(.text+0x147): In function `dlfcn_bind_var': : undefined reference to `dlsym' /usr/local/ssl/lib/libcrypto.a(dso...

.../TWWfsw/zlib11/include -L/usr/local/lib -R/usr/local/lib -L/usr/lib - R/usr/lib -L/opt/TWWfsw/zlib11/lib -L/usr/local/ssl/lib -R/usr/local/ssl/lib conftes t.c -lz -lsocket -lnsl -lgen -lcrypto 1>&5 Undefined first referenced symbol in file dlclose /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o) (sy mbol belongs to implicit dependency /usr/lib/libdl.so.1) dlsym /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o) (sy mbol belongs to implicit dependency /usr/lib/libdl.so.1) dlopen /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o) (sy mbol belongs to implicit...

Hi Sam, Thanks for your answer! Sorry I didn't really know how to process, but this issue block me to make some legacy C code works without having some glue with a bit static lib ;( (The change have really low risk) The changes I used locally to make dlopen/dlclose et dlsym mechanism works :) : Index: wasm/Writer.cpp =================================================================== --- wasm/Writer.cpp (revision 330555) +++ wasm/Writer.cpp (working copy) @@ -257,7 +257,7 @@ raw_ostream &OS = Section->getStream(); writeUleb128(OS, 1, &qu...

...lopenbsd-compat -lresolv -lcrypto -lutil -lz -lnsl -lcrypt /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o)(.text+0x38): In function `dlfcn_load': : undefined reference to `dlopen' /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o)(.text+0xa0): In function `dlfcn_load': : undefined reference to `dlclose' /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o)(.text+0xc9): In function `dlfcn_load': : undefined reference to `dlerror' /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o)(.text+0x13e): In function `dlfcn_unload': : undefined reference to `dlclose' /usr/local/ssl/lib/libcrypto.a(dso_dl...

Hey, So in Fedora rawhide we are now building llvm 3.7.1 into the lots of little shared libraries format. However I'm running into a major problem with the fact that sometimes dlclose isn't dropping all the LLVM libraries from the address space of the process. We have a sequence like this: a) X server asks mesa gbm library to init, it loads the kms_swrast_dri.so with dlopen(LAZY|GLOBAL). kms_swrast_dri.so is linked against a large bunch of LLVM libraries (see below). b) g...

Hi, I'm working on a runtime autotuner that utilizes ORCv2 JIT (I'm closely tracking tip-of-tree), so linking new object files and patching in the new function(s) will happen frequently. One of the concerns my runtime system has is the ability to do one of the following: (1) replacement of the contents of a JITDylib with a new object file [to provide semi-space GC-style reclaiming], (2)

> As far as I know, ObjectFile is either COFF, ELF or MachO format, > statically compiled. But the pass manager for applying optimisation > passes works only on llvm-ir. I would not need to apply optimisations on the parts of the program in the object file. These are meant to be optimised beforehand. The only parts I want to run passes on are specific function that I know

...; OpenSSL 1.1 features a cleanup function that is automatically run on shutdown > using atexit(3). This function frees all OpenSSL-allocated resources. > > In dovecot, OpenSSL is loaded indirectly using dlopen(3) against the relevant > dovecot crypto module and is finally unloaded using dlclose(3). Until > OpenSSL 1.0.1c this worked fine, however OpenSSL 1.0.1c makes sure[1] that the > library stays loaded after the initial dlclose() so that the atexit(3) > handlers can run on shutdown. This, together with the fact that dovecot > uses custom allocation functions for OpenSSL an...

...at iq.pl Openssl updated to openssl-0.9.6b-18 error: /usr/lib/libcrypto.a(dso_dlfcn.o): In function `dlfcn_load': dso_dlfcn.o(.text+0xb9): undefined reference to `dlopen' dso_dlfcn.o(.text+0xc8): undefined reference to `dlopen' dso_dlfcn.o(.text+0x121): undefined reference to `dlclose' /usr/lib/libcrypto.a(dso_dlfcn.o): In function `dlfcn_unload': dso_dlfcn.o(.text+0x192): undefined reference to `dlclose' /usr/lib/libcrypto.a(dso_dlfcn.o): In function `dlfcn_bind_var': dso_dlfcn.o(.text+0x253): undefined reference to `dlsym' /usr/lib/libcrypto.a(dso_dlfc...

...ect2.o sshtty.o readconf.o clientloop.o -L. -Lopenbsd-compat/ -lssh -lopenbsd-compat -lutil -lz -lnsl /usr/lib/libcrypto.a /usr/lib/libcrypto.a(dso_dlfcn.o): In function `dlfcn_load': dso_dlfcn.o(.text+0x8a): undefined reference to `dlopen' dso_dlfcn.o(.text+0xe8): undefined reference to `dlclose' /usr/lib/libcrypto.a(dso_dlfcn.o): In function `dlfcn_unload': dso_dlfcn.o(.text+0x18c): undefined reference to `dlclose' /usr/lib/libcrypto.a(dso_dlfcn.o): In function `dlfcn_bind_var': dso_dlfcn.o(.text+0x239): undefined reference to `dlsym' /usr/lib/libcrypto.a(dso_dlfcn.o):...

...ind_var': dso_dlfcn.c: undefined reference to `dlsym' /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o)(.text+0x448):dso_dlfcn.c: undefined reference to `dlerror' /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o)(.text+0x49d): In function `dlfcn_unload': dso_dlfcn.c: undefined reference to `dlclose' /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o)(.text+0x551): In function `dlfcn_load': dso_dlfcn.c: undefined reference to `dlopen' /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o)(.text+0x5c6):dso_dlfcn.c: undefined reference to `dlclose' /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o)(.t...

...uring compilation Linking nsswitch/libnss_wins.so lib/system.po: In function `sys_dlopen': lib/system.po(.text+0xb37): undefined reference to `dlopen' lib/system.po: In function `sys_dlsym': lib/system.po(.text+0xb57): undefined reference to `dlsym' lib/system.po: In function `sys_dlclose': lib/system.po(.text+0xb74): undefined reference to `dlclose' lib/system.po: In function `sys_dlerror': lib/system.po(.text+0xb91): undefined reference to `dlerror' lib/username.po: In function `user_in_netgroup_list': lib/username.po(.text+0xab7): undefined reference to `yp_ge...

On Tuesday, 27 June 2017 13:55:57 CEST Richard W.M. Jones wrote: > We permit the following constructs in libguestfs code: > > if (guestfs_some_call (g) == -1) { > fprintf (stderr, "failed: error is %s\n", guestfs_last_error (g)); > } > > and: > > guestfs_push_error_handler (g, NULL, NULL); > guestfs_some_call (g); >

Hi I met problem developing plug-in under FreeBSD 6.1. First I tried to use internal plugins like quota and acl but I got: IMAP(xxx): module /usr/local/lib/dovecot/imap/lib01_acl_plugin.so: dlsym(acl_plugin_init) failed: Shared object "nss_dns.so.1" not found, required by "imap" This library doesn't exist on FreeBSD 6.1 Same story when u mention any plugin in

...status.c with -fPIC Linking nsswitch/libnss_wins.so lib/system.po: In function `sys_dlopen': lib/system.po(.text+0xd71): undefined reference to `dlopen' lib/system.po: In function `sys_dlsym': lib/system.po(.text+0xd99): undefined reference to `dlsym' lib/system.po: In function `sys_dlclose': lib/system.po(.text+0xdbe): undefined reference to `dlclose' lib/system.po: In function `sys_dlerror': lib/system.po(.text+0xddc): undefined reference to `dlerror' lib/username.po: In function `user_in_netgroup_list': lib/username.po(.text+0xb76): undefined reference to `yp_ge...