| Cstack_info {base} | R Documentation |
Report information on the C stack size and usage (if available).
Cstack_info()
On most platforms, C stack information is recorded when R is
initialized and used for stack-checking. If this information is
unavailable, the size will be returned as NA, and
stack-checking is not performed.
The information on the stack base address is thought to be accurate on Windows, Linux and FreeBSD (including MacOS X), 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.)
An integer vector. This has named elements
size |
The size of the stack (in bytes), or NA if unknown. |
current |
The estimated current usage (in bytes), possibly NA. |
direction |
1 (stack grows down, the usual case) or
-1 (stack grows up). |
eval_depth |
The current evaluation depth (including two calls
for the call to Cstack_info). |
Cstack_info()