[compiler-rt] Set the ZX_VMO_RESIZABLE option for zx_vmo_create

[phosek]

Summary

Currently VMO in Zircon create using the zx_vmo_create is resizable
by default, but we'll be changing this in the future, requiring an
explicit flag to make the VMO resizable.

lib/profile/InstrProfilingPlatformFuchsia.c

if (__llvm_profile_vmo == ZX_HANDLE_INVALID) {
     zx_info_handle_basic_t Info;
     zx_status_t Status =
         _zx_object_get_info(_zx_process_self(), ZX_INFO_HANDLE_BASIC, &Info,
                             sizeof(Info), NULL, NULL);
     if (Status != ZX_OK)
       return -1;
 
     /* Create VMO to hold the profile data. */
-    Status = _zx_vmo_create(0, 0, &__llvm_profile_vmo);
+    Status = _zx_vmo_create(0, ZX_VMO_RESIZABLE, &__llvm_profile_vmo);
     if (Status != ZX_OK)
       return -1;
 
     /* Give the VMO a name including our process KOID so it's easy to spot. */
     char VmoName[ZX_MAX_NAME_LEN];
     snprintf(VmoName, sizeof(VmoName), "%s.%" PRIu64, ProfileSinkName,
              Info.koid);
     _zx_object_set_property(__llvm_profile_vmo, ZX_PROP_NAME, VmoName,

lib/sanitizer_common/sanitizer_coverage_fuchsia.cc

u32 Setup(u32 num_guards) {
 
     if (next_index_ == 0) {
       CHECK_EQ(vmo_, ZX_HANDLE_INVALID);
       CHECK_EQ(array_, nullptr);
 
       // The first sample goes at [1] to reserve [0] for the magic number.
       next_index_ = 1 + num_guards;
 
-      zx_status_t status = _zx_vmo_create(DataSize(), 0, &vmo_);
+      zx_status_t status = _zx_vmo_create(DataSize(), ZX_VMO_RESIZABLE, &vmo_);
       CHECK_EQ(status, ZX_OK);
 
       // Give the VMO a name including our process KOID so it's easy to spot.
       internal_snprintf(vmo_name_, sizeof(vmo_name_), "%s.%zu", kSancovSinkName,
                         internal_getpid());
       _zx_object_set_property(vmo_, ZX_PROP_NAME, vmo_name_,
                               internal_strlen(vmo_name_));
 

lib/scudo/standalone/fuchsia.cc

if (Data && Data->Vmo != ZX_HANDLE_INVALID) {
     Status = _zx_vmo_set_size(Vmo, VmoSize + Size);
     if (Status != ZX_OK) {
       if (Status != ZX_ERR_NO_MEMORY || !AllowNoMem)
         dieOnMapUnmapError(Status == ZX_ERR_NO_MEMORY);
       return nullptr;
     }
   } else {
     // Otherwise, create a Vmo and set its name.
-    Status = _zx_vmo_create(Size, 0, &Vmo);
+    Status = _zx_vmo_create(Size, ZX_VMO_RESIZABLE, &Vmo);
     if (Status != ZX_OK) {
       if (Status != ZX_ERR_NO_MEMORY || !AllowNoMem)
         dieOnMapUnmapError(Status == ZX_ERR_NO_MEMORY);
       return nullptr;
     }
     _zx_object_set_property(Vmo, ZX_PROP_NAME, Name, strlen(Name));
   }
 

lib/xray/xray_utils.cc

 
 void LogWriter::Flush() XRAY_NEVER_INSTRUMENT {
   // Nothing to do here since WriteAll writes directly into the VMO.
 }
 
 LogWriter *LogWriter::Open() XRAY_NEVER_INSTRUMENT {
   // Create VMO to hold the profile data.
   zx_handle_t Vmo;
-  zx_status_t Status = _zx_vmo_create(0, 0, &Vmo);
+  zx_status_t Status = _zx_vmo_create(0, ZX_VMO_RESIZABLE, &Vmo);
   if (Status != ZX_OK) {
     Report("XRay: cannot create VMO: %s\n", _zx_status_get_string(Status));
     return nullptr;
   }
 
   // Get the KOID of the current process to use in the VMO name.
   zx_info_handle_basic_t Info;
   Status = _zx_object_get_info(_zx_process_self(), ZX_INFO_HANDLE_BASIC, &Info,