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KINFO_GETVMMAP(3) BSD Library Functions Manual KINFO_GETVMMAP(3) NAME kinfo_getvmmap -- function for getting per-process memory map information LIBRARY System Utilities Library (libutil, -lutil) SYNOPSIS #include <sys/types.h> #include <sys/user.h> #include <libutil.h> struct kinfo_vmentry * kinfo_getvmmap(pid_t pid, int *cntp); DESCRIPTION This function is used for obtaining virtual memory mapping information of a particular process. The pid field contains the process identifier. This should be the a process that you have privilege to access. The cntp field is allows the caller to know how many records are returned. This function is a wrapper around sysctl(3) with the KERN_PROC_VMMAP mib. While the kernel returns a packed structure, this function expands the data into a fixed record format. CAVEAT kinfo_getvmmap() calls can cause significant CPU consumption because cal- culating the residency counts requires iterating over all memory pages of the process. Setting the sysctl variable kern.proc_vmmap_skip_resident_count to 1 prevents this calculation. RETURN VALUES On success the kinfo_getvmmap() function returns a pointer to an array of struct kinfo_vmentry structures as defined by <sys/user.h>. The array was obtained by an internal call to malloc(3) and must be freed by the caller with a call to free(3). On failure the kinfo_getvmmap() function returns NULL. SEE ALSO free(3), kinfo_getfile(3), malloc(3) BSD August 18, 2017 BSD
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | CAVEAT | RETURN VALUES | SEE ALSO
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