xinyiZzz commented on code in PR #9301:
URL: https://github.com/apache/incubator-doris/pull/9301#discussion_r863565901
##########
be/src/runtime/tcmalloc_hook.h:
##########
@@ -23,32 +23,40 @@
#include "runtime/thread_context.h"
-// Notice: modify the command in New/Delete Hook should be careful enough!,
-// and should be as simple as possible, otherwise it may cause weird errors.
E.g:
-// 1. The first New Hook call of the process may be before some variables of
-// the process are initialized.
-// 2. Allocating memory in the Hook command causes the Hook to be entered
again,
-// infinite recursion.
-// 3. TCMalloc hook will be triggered during the process of
initializing/Destructor
-// memtracker shared_ptr, Using the object pointed to by this memtracker
shared_ptr
-// in TCMalloc hook may cause crash.
-// 4. Modifying additional thread local variables in ThreadContext
construction and
-// destructor to control the behavior of consume can lead to unexpected
behavior,
-// like this: if (LIKELY(doris::start_thread_mem_tracker)) {
-void new_hook(const void* ptr, size_t size) {
- doris::tls_ctx()->consume_mem(tc_nallocx(size, 0));
-}
-
-void delete_hook(const void* ptr) {
- doris::tls_ctx()->release_mem(tc_malloc_size(const_cast<void*>(ptr)));
-}
-
-void init_hook() {
- MallocHook::AddNewHook(&new_hook);
- MallocHook::AddDeleteHook(&delete_hook);
-}
-
-void destroy_hook() {
- MallocHook::RemoveNewHook(&new_hook);
- MallocHook::RemoveDeleteHook(&delete_hook);
-}
+namespace doris {
+
+class TcmallocHook {
+public:
+ // Notice: modify the command in New/Delete Hook should be careful enough!,
+ // and should be as simple as possible, otherwise it may cause weird
errors. E.g:
+ // 1. The first New Hook call of the process may be before some variables
of
+ // the process are initialized.
+ // 2. Allocating memory in the Hook command causes the Hook to be entered
again,
+ // infinite recursion.
+ // 3. TCMalloc hook will be triggered during the process of
initializing/Destructor
+ // memtracker shared_ptr, Using the object pointed to by this memtracker
shared_ptr
+ // in TCMalloc hook may cause crash.
+ // 4. Modifying additional thread local variables in ThreadContext
construction and
+ // destructor to control the behavior of consume can lead to unexpected
behavior,
+ // like this: if (LIKELY(doris::start_thread_mem_tracker)) {
+ static void new_hook(const void* ptr, size_t size) {
Review Comment:
In order to avoid function redefinition in multiple includes, the function
is moved to the `TcmallocHook` class.
I will recover before. I thought about it, and there will be no redefinition
for the time being.
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