Report Information on C Stack Size and Usage
Report information on the C stack size and usage (if available).
On most platforms, C stack information is recorded when R is
initialized and used for stack-checking. If this information is
size will be returned as
stack-checking is not performed.
The information on the stack base address is thought to be accurate on Windows, Linux, OS X and FreeBSD but a heuristic is used on other platforms. Because this might be slightly inaccurate, the current usage could be estimated as negative. (The heuristic is not used on embedded uses of R on platforms where the stack base is not thought to be accurate.)
The evaluation depth is the number of nested R expressions
currently under evaluation: this has a limit controlled by
An integer vector. This has named elements
- The size of the stack (in bytes), or
- The estimated current usage (in bytes), possibly
1(stack grows down, the usual case) or
-1(stack grows up).
- The current evaluation depth (including two calls
for the call to