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[OpenMP] FreeBSD address check if mapped more native 

/proc unless Linux layer compatibility is activated for CentOS is activated is not present
thus relying on a more native for checking the address.

Reviewers: Hahnfeld, kongyl, jdoerfert, jlpeyton, AndreyChurbanov, emaster, dim

Reviewed By: Hahnfeld

Differential Revision: https://reviews.llvm.org/D67326

llvm-svn: 373152
This commit is contained in:
David Carlier 2019-09-28 19:01:59 +00:00
parent 2adae76cc6
commit fef62e1a68
1 changed files with 42 additions and 1 deletions
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43
openmp/runtime/src/z_Linux_util.cpp
View File

@ -50,6 +50,9 @@
#include <mach/mach.h>
#include <sys/sysctl.h>
#elif KMP_OS_DRAGONFLY || KMP_OS_FREEBSD
#include <sys/types.h>
#include <sys/sysctl.h>
#include <sys/user.h>
#include <pthread_np.h>
#elif KMP_OS_NETBSD
#include <sys/types.h>
@ -1979,7 +1982,7 @@ int __kmp_is_address_mapped(void *addr) {
int found = 0;
int rc;
#if KMP_OS_LINUX || KMP_OS_FREEBSD || KMP_OS_HURD
#if KMP_OS_LINUX || KMP_OS_HURD
/* On GNUish OSes, read the /proc/<pid>/maps pseudo-file to get all the address
ranges mapped into the address space. */
@ -2017,6 +2020,44 @@ int __kmp_is_address_mapped(void *addr) {
// Free resources.
fclose(file);
KMP_INTERNAL_FREE(name);
#elif KMP_OS_FREEBSD
char *buf;
size_t lstsz;
int mib[] = {CTL_KERN, KERN_PROC, KERN_PROC_VMMAP, getpid()};
rc = sysctl(mib, 4, NULL, &lstsz, NULL, 0);
if (rc < 0)
return 0;
// We pass from number of vm entry's semantic
// to size of whole entry map list.
lstsz = lstsz * 4 / 3;
buf = reinterpret_cast<char *>(kmpc_malloc(lstsz));
rc = sysctl(mib, 4, buf, &lstsz, NULL, 0);
if (rc < 0) {
kmpc_free(buf);
return 0;
}
char *lw = buf;
char *up = buf + lstsz;
while (lw < up) {
struct kinfo_vmentry *cur = reinterpret_cast<struct kinfo_vmentry *>(lw);
size_t cursz = cur->kve_structsize;
if (cursz == 0)
break;
void *start = reinterpret_cast<void *>(cur->kve_start);
void *end = reinterpret_cast<void *>(cur->kve_end);
// Readable/Writable addresses within current map entry
if ((addr >= start) && (addr < end)) {
if ((cur->kve_protection & KVME_PROT_READ) != 0 &&
(cur->kve_protection & KVME_PROT_WRITE) != 0) {
found = 1;
break;
}
}
lw += cursz;
}
kmpc_free(buf);
#elif KMP_OS_DARWIN