Re: [Haskell-cafe] Debugging misbehaving multi-threaded programs

On Thu, Jun 11, 2009 at 12:40 AM, Ketil Malde wrote:

Evan Klitzke writes:

...

[...] Unfortunately, this doesn't seem to work; whenever the program terminates due to running out of heap space, the generated .prof file is empty.

Unless there's some specific problem with profiling in combination with threading, you can get heap profiling from a crashing program. Not what you wanted, but you might at least be able to see what is allocated.

After fiddling around a bit, I found out that you can get a heap profile from a program that dies from an error, but not one that dies from actually running out of heap space. I was able to take advantage of this by making the main thread do a threadDelay and then error, with the threadDelay timed to occur during the program's misbehavior. -- Evan Klitzke :wq