From 400c6c8e768b706d7d7721640525ac3b50eaa5f9 Mon Sep 17 00:00:00 2001
From: amai2012 <amai@users.sf.net>
Date: Thu, 10 Jan 2019 21:14:37 +0100
Subject: [PATCH] Improve configuration for dlopen and add suitable test

---
 cfg/posix.cfg    |  8 ++++++++
 test/cfg/posix.c | 17 +++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/cfg/posix.cfg b/cfg/posix.cfg
index c31cd5074..82e9e08d9 100644
--- a/cfg/posix.cfg
+++ b/cfg/posix.cfg
@@ -74,6 +74,10 @@
       <not-bool/>
     </arg>
   </function>
+  <resource>
+    <alloc>dlopen</alloc>
+    <dealloc>dlclose</dealloc>
+  </resource>
   <!-- see http://pubs.opengroup.org/onlinepubs/9699919799/functions/dlopen.html -->
   <function name="dlopen">
     <noreturn>false</noreturn>
@@ -4107,4 +4111,8 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
   <podtype name="glob_t"/>
   <podtype name="locale_t"/>
   <define name="MAP_FAILED" value="-1"/>
+  <define name="RTLD_LAZY" value="0x01"/>
+  <define name="RTLD_NOW" value="0x02"/>
+  <define name="RTLD_GLOBAL" value="0x04"/>
+  <define name="RTLD_LOCAL" value="0x08"/>
 </def>
diff --git a/test/cfg/posix.c b/test/cfg/posix.c
index 265c413e9..5a0c2747a 100644
--- a/test/cfg/posix.c
+++ b/test/cfg/posix.c
@@ -12,6 +12,7 @@
 #include <dirent.h>
 #include <sys/mman.h>
 #include <sys/socket.h>
+#include <dlfcn.h>
 #include <fcntl.h>
 // unavailable on some linux systems #include <ndbm.h>
 #include <netdb.h>
@@ -331,3 +332,19 @@ void timet_h(struct timespec* ptp1)
     // cppcheck-suppress ctime_rCalled
     ctime_r(&clock, buf);
 }
+
+void dl(const char* libname, const char* func)
+{
+    void* lib = dlopen(libname, RTLD_NOW);
+    // cppcheck-suppress resourceLeak
+    // cppcheck-suppress redundantAssignment
+    lib = dlopen(libname, RTLD_LAZY);
+    const char* funcname;
+    // cppcheck-suppress uninitvar
+    // cppcheck-suppress unreadVariable
+    void* sym = dlsym(lib, funcname);
+    void* uninit;
+    // cppcheck-suppress uninitvar
+    dlclose(uninit);
+    // cppcheck-suppress resourceLeak
+}