Memory leak detection tool
Text / peter jiang (translated from newlc.com)
Test allocated resources
The first tool is a listener that is used in memory resources. It can only debug on the simulator. You can use shortcut keys to call
Key Function
Ctrl Alt Shift A Displays the number of assigned stacking units
Ctrl Alt Shift B Displays the number of filed file server resources
Ctrl Alt Shift C Displays the number of allocated window server resources
Pile detection macro
The second tool can detect memory allocation in the code block you specify. Just add these macros to the code section you want to detect:
Macro function
__UHEAP_MARK starts to detect the use of the stack
__UHEAP_CHECK (N) Detection Since the top __uheap_mark is 'n' pile assigned (not yet released)
__UHEAP_CHECKALL (N) Detects whether there is 'n' pile allocated
__UHEAP_MARKEND detection ends, and detects no piles that have not been released after __UHEAP_MARK
__UHEAP_MARKENDC (N) The detection ends, and detects that there is no 'n' unsealed pile after __uheap_mark
This is a simple use example
CMYCLASS * A1 = New (Eleave) CMYCLASS;
...
__UHEAP_MARK; / / Start detection
CMYCLASS * A2 = New (Eleave) CMYCLASS;
CMYCLASS * A3 = New (Eleave) CMYCLASS;
...
__UHEAP_CHECK (2); // Test 2 stack units after __UHEAP_MARK (A2, A3)
__UHEAP_CHECKALL (3); // Test three stacks have been assigned (A1, A2, A3)
Delete (A2);
__UHEAP_MARKEND; // End detection, A3 memory leakage
If you want to design a driver or kernel module, you can use the __kheap_xxx macro to detect the kernel heap.
Assignment failure tool
Used to perform pressure test. You can use the following macro
Macro function
__UHEAP_SETFAIL (atype, n) can specify how the next memory is assigned according to the different parameters.
The parameter table is as follows:
EDeeeeeeterministic: N request failed
Eraandom: Random fail, N is the random number
Etruerandom: Random failure
__UHEAP_FAILNEXT (N) caused next assignment failure
__UHEAP_RESET () Avoid memory failure
You can also press CTRL ALT SHIFT P and CTRL Alt Shift Q to use allocation failure tools in the simulator.
