[Openmp-commits] [openmp] [OpenMP] Don't use libproc on Solaris (PR #142379)
Rainer Orth via Openmp-commits
openmp-commits at lists.llvm.org
Mon Jun 2 05:44:40 PDT 2025
https://github.com/rorth created https://github.com/llvm/llvm-project/pull/142379
`openmp` currently doesn't compile on 32-bit Solaris:
```
FAILED: projects/openmp/runtime/src/CMakeFiles/omp.dir/z_Linux_util.cpp.o
[...]
In file included from openmp/runtime/src/z_Linux_util.cpp:78:
In file included from /usr/include/libproc.h:25:
In file included from /usr/include/gelf.h:10:
/usr/include/libelf.h:22:2: error: "large files are not supported by libelf"
22 | #error "large files are not supported by libelf"
| ^
In file included from openmp/runtime/src/z_Linux_util.cpp:78:
/usr/include/libproc.h:42:2: error: "Cannot use libproc in the large file compilation environment"
42 | #error "Cannot use libproc in the large file compilation environment"
| ^
```
Looking closer, there's no point in using `Pgrab` (the only interface from `<libproc.h>`) at all: the resulting `ps_prochandle_t *` isn't used in the remainder of the code and the original PR #82930 gives no indication why it is deemed necessary/useful.
While at it, this patch switches to use `/proc/self/xmap`, matching `compiler-rt`'s `sanitizer_procmaps_solaris.cpp`, and makes some minor formatting fixes.
Tested on `sparc-sun-solaris2.11`, `sparcv9-sun-solaris2.11`, `i386-pc-solaris2.11`, and `amd64-pc-solaris2.11`.
>From ea27702addaf51979db073e697c08fefaa619e44 Mon Sep 17 00:00:00 2001
From: Rainer Orth <ro at gcc.gnu.org>
Date: Mon, 2 Jun 2025 14:42:17 +0200
Subject: [PATCH] [OpenMP] Don't use libproc on Solaris
`openmp` currently doesn't compile on 32-bit Solaris:
```
FAILED: projects/openmp/runtime/src/CMakeFiles/omp.dir/z_Linux_util.cpp.o
[...]
In file included from openmp/runtime/src/z_Linux_util.cpp:78:
In file included from /usr/include/libproc.h:25:
In file included from /usr/include/gelf.h:10:
/usr/include/libelf.h:22:2: error: "large files are not supported by libelf"
22 | #error "large files are not supported by libelf"
| ^
In file included from openmp/runtime/src/z_Linux_util.cpp:78:
/usr/include/libproc.h:42:2: error: "Cannot use libproc in the large file compilation environment"
42 | #error "Cannot use libproc in the large file compilation environment"
| ^
```
Looking closer, there's no point in using `Pgrab` (the only interface from
`<libproc.h>`) at all: the resulting `ps_prochandle_t *` isn't used in the
remainder of the code and the original PR #82930 gives no indication why it
is deemed necessary/useful.
While at it, this patch switches to use `/proc/self/xmap`, matching
`compiler-rt`'s `sanitizer_procmaps_solaris.cpp`, and makes some minor
formatting fixes.
Tested on `sparc-sun-solaris2.11`, `sparcv9-sun-solaris2.11`,
`i386-pc-solaris2.11`, and `amd64-pc-solaris2.11`.
---
openmp/runtime/cmake/LibompHandleFlags.cmake | 3 --
openmp/runtime/src/z_Linux_util.cpp | 30 +++++++-------------
2 files changed, 10 insertions(+), 23 deletions(-)
diff --git a/openmp/runtime/cmake/LibompHandleFlags.cmake b/openmp/runtime/cmake/LibompHandleFlags.cmake
index cb7e488652230..470f94ee90cbf 100644
--- a/openmp/runtime/cmake/LibompHandleFlags.cmake
+++ b/openmp/runtime/cmake/LibompHandleFlags.cmake
@@ -149,9 +149,6 @@ function(libomp_get_libflags libflags)
endif()
elseif(${CMAKE_SYSTEM_NAME} MATCHES "Linux|NetBSD|SunOS")
libomp_append(libflags_local -lm)
- if (${CMAKE_SYSTEM_NAME} STREQUAL "SunOS")
- libomp_append(libflags_local "-lproc")
- endif()
endif()
set(libflags_local ${libflags_local} ${LIBOMP_LIBFLAGS})
libomp_setup_flags(libflags_local)
diff --git a/openmp/runtime/src/z_Linux_util.cpp b/openmp/runtime/src/z_Linux_util.cpp
index 3b82b45e24405..368c0b6e872cc 100644
--- a/openmp/runtime/src/z_Linux_util.cpp
+++ b/openmp/runtime/src/z_Linux_util.cpp
@@ -75,7 +75,6 @@
#include <pthread_np.h>
#endif
#elif KMP_OS_SOLARIS
-#include <libproc.h>
#include <procfs.h>
#include <thread.h>
#include <sys/loadavg.h>
@@ -2232,43 +2231,34 @@ int __kmp_is_address_mapped(void *addr) {
kvm_close(fd);
#elif KMP_OS_SOLARIS
- prmap_t *cur, *map;
+ prxmap_t *cur, *map;
void *buf;
uintptr_t uaddr;
ssize_t rd;
- int err;
- int file;
-
+ int fd;
pid_t pid = getpid();
- struct ps_prochandle *fd = Pgrab(pid, PGRAB_RDONLY, &err);
- ;
-
- if (!fd) {
- return 0;
- }
-
- char *name = __kmp_str_format("/proc/%d/map", pid);
- size_t sz = (1 << 20);
- file = open(name, O_RDONLY);
- if (file == -1) {
+ char *name = __kmp_str_format("/proc/%d/xmap", pid);
+ fd = open(name, O_RDONLY);
+ if (fd == -1) {
KMP_INTERNAL_FREE(name);
return 0;
}
+ size_t sz = (1 << 20);
buf = KMP_INTERNAL_MALLOC(sz);
- while (sz > 0 && (rd = pread(file, buf, sz, 0)) == sz) {
+ while (sz > 0 && (rd = pread(fd, buf, sz, 0)) == sz) {
void *newbuf;
sz <<= 1;
newbuf = KMP_INTERNAL_REALLOC(buf, sz);
buf = newbuf;
}
- map = reinterpret_cast<prmap_t *>(buf);
+ map = reinterpret_cast<prxmap_t *>(buf);
uaddr = reinterpret_cast<uintptr_t>(addr);
for (cur = map; rd > 0; cur++, rd = -sizeof(*map)) {
- if ((uaddr >= cur->pr_vaddr) && (uaddr < cur->pr_vaddr)) {
+ if (uaddr >= cur->pr_vaddr && uaddr < cur->pr_vaddr) {
if ((cur->pr_mflags & MA_READ) != 0 && (cur->pr_mflags & MA_WRITE) != 0) {
found = 1;
break;
@@ -2277,7 +2267,7 @@ int __kmp_is_address_mapped(void *addr) {
}
KMP_INTERNAL_FREE(map);
- close(file);
+ close(fd);
KMP_INTERNAL_FREE(name);
#elif KMP_OS_DARWIN
More information about the Openmp-commits
mailing list