Arduino Test Suite - Arduino - page 269

void* buffer = malloc(2);
for (int i = 4; i <= 8; i+=2) {
buffer = realloc(buffer, i);
}
free(buffer);
ATS_PrintTestStatus("Reallocating repeatedly larger preserves free memory",
startMemory == ATS_GetFreeMemory());
}

void loop() {
}

Example: Testing for a Memory Leak
Any new values created inside the memory test will use memory. So, you must declare all the variables that consume
memory at the beginning of the setup.

startMemoryUsage = ATS_GetFreeMemory();

Once this is done, your starting memory is set. Anything that takes without putting back will be counted as a
failure. The memory test is over when you call the following:

ATS_ReportMemoryUsage(startMemoryUsage);

Here are some hints for debugging:

• By putting the memory test at the bottom of the code, you can gradually move it higher into

the code and see where the memory was lost.

• An

OK indicates that the memory loss occurred below the memory test.
A binary search will help you find the problem. •

Listing 13-7 is a sketch of the testing skeleton.

Listing 13-7. Sketch of the Testing Skeleton

#include <ArduinoTestSuite.h>

//************************************************************************
void setup()
{
int startMemoryUsage;

//startMemoryUsage must be set directly before ATS_begin
startMemoryUsage = ATS_GetFreeMemory();
ATS_begin("Arduino", "Skeleton Test");
/*
* Test Run Start
* Test one passes because result is set to true
* Test two fails becuase result is set to false
* You can test memory for any set of tests by using the ATS_ReportMemoryUsage test