[compiler-rt] d6fc61b - [profile] Record the profile size as a property of the VMO

[Petr Hosek via llvm-commits]

Author: Petr Hosek
Date: 2020-03-19T16:22:19-07:00
New Revision: d6fc61b7e8b0dac481e4c84c1ace4a43e5b7ed4c

URL: https://github.com/llvm/llvm-project/commit/d6fc61b7e8b0dac481e4c84c1ace4a43e5b7ed4c
DIFF: https://github.com/llvm/llvm-project/commit/d6fc61b7e8b0dac481e4c84c1ace4a43e5b7ed4c.diff

LOG: [profile] Record the profile size as a property of the VMO

While the VMO size is always page aligned, we can record the content
size as a property and then use this metadata when writing the profile
to a file.

Differential Revision: https://reviews.llvm.org/D76402

Added: 
    

Modified: 
    compiler-rt/lib/profile/InstrProfilingPlatformFuchsia.c

Removed: 
    


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diff  --git a/compiler-rt/lib/profile/InstrProfilingPlatformFuchsia.c b/compiler-rt/lib/profile/InstrProfilingPlatformFuchsia.c
index bf78adbbca15..2d66be6de73e 100644
--- a/compiler-rt/lib/profile/InstrProfilingPlatformFuchsia.c
+++ b/compiler-rt/lib/profile/InstrProfilingPlatformFuchsia.c
@@ -79,6 +79,11 @@ static uint32_t lprofVMOWriter(ProfDataWriter *This, ProfDataIOVec *IOVecs,
     __llvm_profile_offset += Length;
   }
 
+  /* Record the profile size as a property of the VMO. */
+  _zx_object_set_property(__llvm_profile_vmo, ZX_PROP_VMO_CONTENT_SIZE,
+                          &__llvm_profile_offset,
+                          sizeof(__llvm_profile_offset));
+
   return 0;
 }