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--- src/jdk.management/unix/native/libmanagement_ext/OperatingSystemImpl.c.orig 2025-04-19 23:57:10 UTC
+++ src/jdk.management/unix/native/libmanagement_ext/OperatingSystemImpl.c
@@ -58,6 +58,7 @@
#include <unistd.h>
#ifdef __FreeBSD__
+#include <sys/user.h>
#include <vm/vm_param.h>
#endif
@@ -261,23 +262,43 @@ Java_com_sun_management_internal_OperatingSystemImpl_g
}
return t_info.virtual_size;
#elif defined(__FreeBSD__)
- FILE *fp;
- unsigned long end, start;
- jlong total = 0;
+ int mib[4];
+ struct kinfo_vmentry *kve;
+ long total = 0;
+ size_t len = 0;
+ int error;
+ char *buf, *bp, *eb;
- if ((fp = fopen("/proc/curproc/map", "r")) == NULL) {
- throw_internal_error(env, "Unable to open /proc/curproc/map");
+ mib[0] = CTL_KERN;
+ mib[1] = KERN_PROC;
+ mib[2] = KERN_PROC_VMMAP;
+ mib[3] = getpid();
+ error = sysctl(mib, 4, NULL, &len, NULL, 0);
+ if (error) {
+ throw_internal_error(env, "Cannot sysctl(kern.proc.vvmap)");
return -1;
}
-
- for (;;) {
- // Ignore everything except start and end entries
- if (fscanf(fp, "0x%lx 0x%lx %*[^\n]\n", &start, &end) != 2 || start > end)
- break;
- total += end - start;
+ len = len * 4 / 3;
+ buf = malloc(len);
+ if (buf == NULL) {
+ throw_internal_error(env, "Fail to allocate memory");
+ return -1;
}
-
- fclose(fp);
+ error = sysctl(mib, 4, buf, &len, NULL, 0);
+ if (error) {
+ throw_internal_error(env, "Cannot sysctl(kern.proc.vvmap)");
+ return -1;
+ }
+ bp = buf;
+ eb = buf + len;
+ while (bp < eb) {
+ kve = (struct kinfo_vmentry *)(uintptr_t)bp;
+ if (kve->kve_structsize == 0)
+ break;
+ bp += kve->kve_structsize;
+ total += kve->kve_end - kve->kve_start;
+ }
+ free(buf);
return total;
#else /* _ALLBSD_SOURCE */
/*
@@ -487,6 +508,21 @@ Java_com_sun_management_internal_OperatingSystemImpl_g
return nfiles;
#elif defined(__OpenBSD__)
return getdtablecount();
+#elif defined(__FreeBSD__)
+ int mib[4];
+ int error;
+ int nfds;
+ size_t len;
+
+ len = sizeof(nfds);
+ mib[0] = CTL_KERN;
+ mib[1] = KERN_PROC;
+ mib[2] = KERN_PROC_NFDS;
+ mib[3] = 0;
+
+ if (sysctl(mib, 4, &nfds, &len, NULL, 0) == -1)
+ return -1;
+ return nfds;
#else /* solaris/linux */
DIR *dirp;
struct dirent64* dentp;
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