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Diagnosing Crashes on garbage collection
3 messages · Andrew Redd, Thomas Lumley, Brian Ripley
On Sun, 16 Nov 2008, Andrew Redd wrote:
I'm having problems with an access violation error on some compiled code that I'm writing and I was hoping that some one had insights as to what might be causing the access violation and possibly how to remedy it.
If you are using (or can use) Linux, then valgrind is an excellent tool for this. There's some documentation in 'Writing R Extensions'. Valgrind runs your code in a virtual machine and tracks all memory accesses, so it often will even find bugs in C code that are hard to reproduce. -thomas Thomas Lumley Assoc. Professor, Biostatistics tlumley at u.washington.edu University of Washington, Seattle
On Sun, 16 Nov 2008, Thomas Lumley wrote:
On Sun, 16 Nov 2008, Andrew Redd wrote:
I'm having problems with an access violation error on some compiled code that I'm writing and I was hoping that some one had insights as to what might be causing the access violation and possibly how to remedy it.
If you are using (or can use) Linux, then valgrind is an excellent tool for this. There's some documentation in 'Writing R Extensions'. Valgrind runs your code in a virtual machine and tracks all memory accesses, so it often will even find bugs in C code that are hard to reproduce.
And if it is R's garbage collection that is the issue, using gctorture(TRUE) (with valgrind if possible) will provoke the problem at the earlist opportunity. There is a section in 'Writing R Extensions' on that too.
Brian D. Ripley, ripley at stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595