On 2/22/23 23:05, Vanessa McHale wrote:
Hello all,
I am trying to write an interface for BQN
<https://mlochbaum.github.io/BQN/> and R
However, even
|
dyn.load("/usr/local/lib/libcbqn.so"); .Call("bqn_init")|
immediately fails on the BQN side, viz.
|Failed to allocate memory for JIT 200 times; stopping trying||
||CBQN interpreter entered unexpected state, exiting.
|This is because BQN tries to allocate memory for a JIT near itself and
also in the lower 32 bits.|
u64 near = (u64)&bqn_exec;
u64 MAX_DIST = 1ULL<<30;
mmap(NULL, sz, PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_NORESERVE|MAP_PRIVATE|MAP_ANONYMOUS|MAP_32BIT, -1, 0);
|However, |&bqn_exec| seems to be 0x7...||i.e. libcbqn.so is being
loaded to a high address. Why is this? Is there some way to request that
it and its symbols be loaded to lower addresses? I have never had this
happen when using dlopen and dlsym!|
R doesn't do anything special here, it uses also dlopen() and dlsym() on
Unix systems. I am not aware of a portable way to influence where the
library gets loaded at OS level, and certainly there is no such way in R.
Best
Tomas
|
Thanks!
Vanessa McHale|
|
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