support glibc_maloc alloc succeed when tenant reach limit

deps/oblib/src/lib/alloc/alloc_struct.cpp

@@ -25,6 +25,18 @@ thread_local ObMemAttr ObMallocHookAttrGuard::tl_mem_attr(OB_SERVER_TENANT_ID,
                                                           "glibc_malloc",
                                                           ObCtxIds::GLIBC);
 
+ObMallocHookAttrGuard::ObMallocHookAttrGuard(const ObMemAttr& attr)
+  : old_attr_(tl_mem_attr)
+{
+  tl_mem_attr = attr;
+  tl_mem_attr.ctx_id_ = ObCtxIds::GLIBC;
+}
+
+ObMallocHookAttrGuard::~ObMallocHookAttrGuard()
+{
+  tl_mem_attr = old_attr_;
+}
+
 bool ObLabel::operator==(const ObLabel &other) const
 {
   bool bret = false;

deps/oblib/src/lib/alloc/alloc_struct.h

@@ -593,15 +593,8 @@ private:
 class ObMallocHookAttrGuard
 {
 public:
-  ObMallocHookAttrGuard(const ObMemAttr& attr)
+  ObMallocHookAttrGuard(const ObMemAttr& attr);
-   : old_attr_(tl_mem_attr)
+  ~ObMallocHookAttrGuard();
-  {
-    tl_mem_attr = attr;
-  }
-  ~ObMallocHookAttrGuard()
-  {
-    tl_mem_attr = old_attr_;
-  }
   static ObMemAttr get_tl_mem_attr()
   {
     return tl_mem_attr;

deps/oblib/src/lib/alloc/malloc_hook.cpp

@@ -62,6 +62,10 @@ void *ob_malloc_retry(size_t size)
     ObMemAttr attr = ObMallocHookAttrGuard::get_tl_mem_attr();
     SET_USE_500(attr);
     ptr = ob_malloc(size, attr);
+    if (OB_ISNULL(ptr)) {
+      attr.tenant_id_ = OB_SERVER_TENANT_ID;
+      ptr = ob_malloc(size, attr);
+    }
     if (OB_ISNULL(ptr)) {
       ::usleep(10000);  // 10ms
     }