DrMalloc: turn malloc interception into a DR Extension

[derekbruening]

From bruen...@google.com on March 09, 2012 09:43:47

xref issue #822 and issue #823 another extension from the original discussion was DrMalloc: malloc/free interception. this would be alloc.c and perhaps also heap.c. would depend on DrSyscall but otherwise is already fairly well-contained.

Original issue: http://code.google.com/p/drmemory/issues/detail?id=824

[derekbruening]

From bruen...@google.com on January 23, 2013 09:23:48

as we decided, DrSyscall does not indicate which syscall map memory, so
DrMalloc should do that. this is not trivial, as some unusual syscalls map
memory: (e.g., NtMapCMFModule and NtGdiCreateDIBSection).

we want this for Umbra.