1) ICS(Ice cream sandwich) AOSP code - 4.0.3
These are the pointers to verify in native source code for the "low-memory" condition.
1) Detect "Out of Memory on" situation in the below functions
Function Names : dvmMalloc() calls
File Name : Heap.cpp
Path : /dalvik/vm/alloc
2) ActivityManager kill the process.
Function Name : requestFinishActivityLocked
File Name : ActivityStack.java
Path : /frameworks/base/services/java/com/android/server/am
3) Report process is died.
Function Name : appDiedLocked
File Name : ActivityManagerService.java
Path : frameworks/base/services/java/com/android/server/am/
Enable the Native logs in above functions, and from this you can confirm that the application is getting killed because of low memory.
Check this link to know "How to enable native logs".
Note : execute '/proc/meminfo' to know the current status of memory consumed, memory free etc..