Fix FP memleak (f'up to #12186) (#5671)

Author: chrchr-github

lib/checkleakautovar.cpp

@@ -971,7 +971,7 @@ void CheckLeakAutoVar::functionCall(const Token *tokName, const Token *tokOpenin
                 const Library::AllocFunc* deallocFunc = mSettings->library.getDeallocFuncInfo(tokName);
                 VarInfo::AllocInfo dealloc(deallocFunc ? deallocFunc->groupId : 0, VarInfo::DEALLOC, tokName);
                 if (const Library::AllocFunc* allocFunc = mSettings->library.getAllocFuncInfo(tokName)) {
-                    if (allocFunc->arg == argNr) {
+                    if (allocFunc->arg == argNr && !(arg->variable() && arg->variable()->isArgument() && arg->valueType() && arg->valueType()->pointer > 1)) {
                         leakIfAllocated(arg, varInfo);
                         VarInfo::AllocInfo& varAlloc = varInfo.alloctype[arg->varId()];
                         varAlloc.type = allocFunc->groupId;

test/cfg/gnu.c

@@ -355,7 +355,6 @@ void memleak_asprintf(char **ptr, const char *fmt, const int arg)
         free(ptr);
     }
     if (-1 != asprintf(ptr,fmt,arg)) {}
-    // cppcheck-suppress memleak
 }
 
 void memleak_asprintf2() { // #12186
@@ -372,6 +371,15 @@ void memleak_asprintf3() {
     free(p);
 }
 
+void memleak_asprintf4(char** p) {
+    asprintf(p, "%s", "test");
+}
+
+void memleak_asprintf5(char* p) {
+    asprintf(&p, "%s", "test");
+    // cppcheck-suppress memleak
+}
+
 void memleak_xmalloc()
 {
     char *p = (char*)xmalloc(10);