#include "sql/check_stack.h"
#include "my_config.h"
#include <stdio.h>
#include <algorithm>
#include <atomic>
#include <new>
#include "my_compiler.h"
#include "my_dbug.h"
#include "my_inttypes.h"
#include "my_sys.h"
#include "mysql_com.h"
#include "mysqld_error.h"
#include "sql/current_thd.h"
#include "sql/derror.h"
#include "sql/sql_class.h"

Macros
#define	used_stack(A, B) (long)(A - B)

Functions
bool	check_stack_overrun (const THD thd, long margin, unsigned char buf)
	Check stack for a overrun. More...

Variables
std::atomic< long >	max_stack_used

Macro Definition Documentation

◆ used_stack

#define used_stack	(	A,
		B
	)	(long)(A - B)

Function Documentation

◆ check_stack_overrun()

bool check_stack_overrun	(	const THD *	thd,
		long	margin,
		unsigned char *	buf
	)

Check stack for a overrun.

Parameters

thd	Thread handler.
margin	Minimal acceptable unused space in the stack.
buf	See a note below.

Returns: false if success, true if error (reported).

Note

Note: The 'buf' parameter is necessary, and we must have code which uses it.

Some of the fix_fields functions have a "dummy" buffer large enough for the corresponding execution. (Thus we only have to check in fix_fields.)
Passing the buffer to check_stack_overrun() prevents the compiler from removing it.
For -flto builds, the dummy buffer may be optimized away, so we need to write something into it.

Variable Documentation

◆ max_stack_used

std::atomic<long> max_stack_used

Macros