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.Dd January 9, 2018 .Dt KVM_GETLWPS 3 .Os .Sh NAME .Nm kvm_getlwps .Nd access state of LWPs belonging to a user process .Sh LIBRARY .Lb libkvm .Sh SYNOPSIS n kvm.h n sys/param.h n sys/sysctl.h .Fa kvm_t *kd
.Ft struct kinfo_lwp * .Fn kvm_getlwps "kvm_t *kd" "int pid" "unsigned long procaddr" "size_t elemsize" "int *cnt" .Sh DESCRIPTION .Fn kvm_getlwps returns the set of LWPs belonging to the process specified by .Fa pid or .Fa procaddr in the kernel indicated by .Fa kd . The number of LWPs found is returned in the reference parameter .Fa cnt . The LWPs are returned as a contiguous array of .Sy kinfo_lwp structures. This memory is locally allocated, and subsequent calls to .Fn kvm_getlwps and .Fn kvm_close will overwrite this storage.
p Only the first .Fa elemsize bytes of each array entry are returned. If the size of the .Sy kinfo_lwp structure increases in size in a future release of .Nx the kernel will only return the requested amount of data for each array entry and programs that use .Fn kvm_getlwps will continue to function without the need for recompilation.
p If called against an active kernel, the .Fn kvm_getlwps function will use the .Xr sysctl 3 interface and return information about the process identified by .Fa pid ; otherwise the kernel memory device file or swap device will be accessed and the process is identified by the location passed in .Fa paddr . .Sh RETURN VALUES .Fn kvm_getlwps returns .Dv NULL on failure. .Sh SEE ALSO .Xr kvm 3 , .Xr kvm_close 3 , .Xr kvm_geterr 3 , .Xr kvm_getproc2 3 , .Xr kvm_getprocs 3 , .Xr kvm_nlist 3 , .Xr kvm_open 3 , .Xr kvm_openfiles 3 , .Xr kvm_read 3 , .Xr kvm_write 3 .Sh BUGS These routines do not belong in the kvm interface.