Per RFC fix several leaks in opal and ompi. Details below.

pml/v:
  - If vprotocol is not being used vprotocol_include_list is leaked. Assume vprotocol never takes ownership (see below) and always free the string.

coll/ml:
  - (patch verified) calling mca_base_param_lookup_string after mca_base_param_reg_string is unnecessary. The call to mca_base_param_lookup_string causes the value returned by mca_base_param_reg_string to be leaked.
  - Need to free mca_coll_ml_component.config_file_name on component close.

btl/openib:
  - calling mca_base_param_lookup_string after mca_base_param_reg_string is unnecessary. The call to mca_base_param_lookup_string causes the value returned by mca_base_param_reg_string to be leaked.

vprotocol/base:
  - There was no way for pml/v to determine if vprotocol took ownership of vprotocol_include_list. Fix by always never ownership (use strdup).

mca/base:
  - param_lookup will result in storage->stringval to be a newly allocated string if the mca parameter has a string value. ensure this string is always freed.

cmr:v1.7

This commit was SVN r27569.

ompi/mca/btl/openib/btl_openib_mca.c

@@ -81,7 +81,6 @@ static int reg_string(const char* param_name,
                                &mca_btl_openib_component.super.btl_version,
                                deprecated_param_name, true);
     }
-    mca_base_param_lookup_string(index, &value);
 
     if (0 != (flags & REGSTR_EMPTY_OK) && 0 == strlen(value)) {
         opal_output(0, "Bad parameter value for parameter \"%s\"",

ompi/mca/coll/ml/coll_ml_component.c

@@ -390,6 +390,8 @@ static int ml_open(void)
     cs->base_sequence_number = -1;
     cs->progress_is_busy = false;
 
+    mca_coll_ml_component.config_file_name = NULL;
+
     /* load mca parametres */
     rc = mca_coll_ml_register_params();
     if (OMPI_SUCCESS != rc) {
@@ -477,6 +479,12 @@ static int ml_close(void)
 
     mca_coll_ml_component_t *cs = &mca_coll_ml_component;
 
+    /* Free the config file name (allocated by mca_coll_ml_register_params) */
+    if (NULL != mca_coll_ml_component.config_file_name) {
+        free (mca_coll_ml_component.config_file_name);
+        mca_coll_ml_component.config_file_name = NULL;
+    }
+
     /* There is not need to release/close resource if the 
      * priority was set to zero */
     if (cs->ml_priority <= 0) {

ompi/mca/coll/ml/coll_ml_mca.c

@@ -65,8 +65,6 @@ static int reg_string(const char* param_name,
                                deprecated_param_name, true);
     }
 
-    mca_base_param_lookup_string(index, &value);
-
     if (0 != (flags & REGSTR_EMPTY_OK) && 0 == strlen(value)) {
         opal_output(0, "Bad parameter value for parameter \"%s\"",
                 param_name);

ompi/mca/pml/v/pml_v_component.c

@@ -67,6 +67,7 @@ static int mca_pml_v_component_open(void)
     int verbose;
     int priority;
     char *vprotocol_include_list;
+    int rc;
     
     priority = mca_pml_v_param_register_int("priority", -1);
     output = mca_pml_v_param_register_string("output", "stderr");
@@ -84,7 +85,10 @@ static int mca_pml_v_component_open(void)
             
     V_OUTPUT_VERBOSE(500, "loaded");
 
-    return mca_vprotocol_base_open(vprotocol_include_list);
+    rc = mca_vprotocol_base_open(vprotocol_include_list);
+    free (vprotocol_include_list);
+
+    return rc;
 }
  
 static int mca_pml_v_component_close(void)

ompi/mca/vprotocol/base/vprotocol_base.c

@@ -27,11 +27,11 @@ mca_pml_v_t mca_pml_v = {-1, 0, 0};
 int mca_vprotocol_base_open(char *vprotocol_include_list)
 {
     OBJ_CONSTRUCT(&mca_vprotocol_base_components_available, opal_list_t);
-    mca_vprotocol_base_include_list = vprotocol_include_list;
-    if (NULL == mca_vprotocol_base_include_list ||
+    if (NULL == vprotocol_include_list ||
        mca_vprotocol_base_include_list[0] == 0) {
         return OMPI_SUCCESS;
     }
+    mca_vprotocol_base_include_list = strdup (vprotocol_include_list);
     return mca_base_components_open("vprotocol", 0, 
                                     mca_vprotocol_base_static_components, 
                                     &mca_vprotocol_base_components_available, 

opal/mca/base/mca_base_param.c

@@ -137,6 +137,7 @@ static void info_constructor(mca_base_param_info_t *p);
 static void info_destructor(mca_base_param_info_t *p);
 static void syn_info_constructor(syn_info_t *si);
 static void syn_info_destructor(syn_info_t *si);
+static mca_base_param_type_t param_type_from_index (size_t index);
 
 /*
  * Make the class instance for mca_base_param_t
@@ -514,11 +515,17 @@ int mca_base_param_set_string(int index, char *value)
 int mca_base_param_lookup_source(int index, mca_base_param_source_t *source, char **source_file)
 {
     mca_base_param_storage_t storage;
+    int rc;
 
-    if (param_lookup(index, &storage, source, source_file)) {
-        return OPAL_SUCCESS;
+    storage.stringval = NULL;
+
+    rc = param_lookup(index, &storage, source, source_file);
+    if (MCA_BASE_PARAM_TYPE_STRING == param_type_from_index (index) &&
+        NULL != storage.stringval) {
+        free (storage.stringval);
     }
-    return OPAL_ERROR;
+
+    return rc ? OPAL_SUCCESS : OPAL_ERROR;
 }
 
 /*
@@ -1544,6 +1551,27 @@ static bool param_set_override(size_t index,
     return true;
 }
 
+/*
+ * Lookup the type of a parameter from an index
+ */
+static mca_base_param_type_t param_type_from_index (size_t index)
+{
+    mca_base_param_t *array;
+    size_t size;
+
+    /* Lookup the index and see if it's valid */
+
+    if (!initialized) {
+        return false;
+    }
+    size = opal_value_array_get_size(&mca_base_params);
+    if (index > size) {
+        return false;
+    }
+    array = OPAL_VALUE_ARRAY_GET_BASE(&mca_base_params, mca_base_param_t);
+
+    return array[index].mbp_type;
+}
 
 /*
  * Lookup a parameter in multiple places