svm: asan: fix asan support
- restrict the unittests SVM address space to what is supported by ASan
- mark SVM mmap()ed address space accessible for ASan
- SVM shared memory heap scheme means some allocation can happen
outside the current process. Lazily mark those accessible for ASan
Type: fix
Change-Id: I7c196c80b2a5297651d0afa54f1a8e478fcf59b1
Signed-off-by: Benoît Ganne <bganne@cisco.com>
diff --git a/src/svm/svm.c b/src/svm/svm.c
index 6249a34..20f4b7a 100644
--- a/src/svm/svm.c
+++ b/src/svm/svm.c
@@ -329,6 +329,7 @@
return -3;
}
close (fd);
+ CLIB_MEM_UNPOISON (rp->data_base, map_size);
rp->backing_file = (char *) format (0, "%s\0", a->backing_file);
rp->flags |= SVM_FLAGS_FILE;
}
@@ -414,6 +415,7 @@
return -3;
}
close (fd);
+ CLIB_MEM_UNPOISON (rp->data_base, map_size);
}
return 0;
}
@@ -607,6 +609,7 @@
return (0);
}
close (svm_fd);
+ CLIB_MEM_UNPOISON (rp, a->size);
svm_region_init_mapped_region (a, rp);
@@ -663,6 +666,9 @@
clib_warning ("mmap");
return (0);
}
+
+ CLIB_MEM_UNPOISON (rp, MMAP_PAGESIZE);
+
/*
* We lost the footrace to create this region; make sure
* the winner has crossed the finish line.
@@ -699,6 +705,8 @@
close (svm_fd);
+ CLIB_MEM_UNPOISON (rp, a->size);
+
if ((uword) rp != rp->virtual_base)
{
clib_warning ("mmap botch");
@@ -1042,6 +1050,7 @@
oldheap = svm_push_pvt_heap (rp); /* nb vec_delete() in the loop */
/* Remove the caller from the list of mappers */
+ CLIB_MEM_UNPOISON (rp->client_pids, vec_bytes (rp->client_pids));
for (i = 0; i < vec_len (rp->client_pids); i++)
{
if (rp->client_pids[i] == mypid)
@@ -1174,6 +1183,7 @@
virtual_base = root_rp->virtual_base;
virtual_size = root_rp->virtual_size;
+ CLIB_MEM_UNPOISON (root_rp->client_pids, vec_bytes (root_rp->client_pids));
for (i = 0; i < vec_len (root_rp->client_pids); i++)
{
if (root_rp->client_pids[i] == mypid)