[dfsan] extend a test case to measure origin memory usage

[stephan.yichao.zhao]

Summary

This is to support D101204.

compiler-rt/test/dfsan/release_shadow_space.c

 // DFSAN_OPTIONS=no_huge_pages_for_shadow=false RUN: %clang_dfsan %s -o %t && setarch `uname -m` -R %run %t
 // DFSAN_OPTIONS=no_huge_pages_for_shadow=true RUN: %clang_dfsan %s -o %t && setarch `uname -m` -R %run %t
+// DFSAN_OPTIONS=no_huge_pages_for_shadow=false RUN: %clang_dfsan %s -DORIGIN_TRACKING -mllvm -dfsan-fast-16-labels -mllvm -dfsan-track-origins=1 -o %t && setarch `uname -m` -R %run %t
+// DFSAN_OPTIONS=no_huge_pages_for_shadow=true RUN: %clang_dfsan %s -DORIGIN_TRACKING -mllvm -dfsan-fast-16-labels -mllvm -dfsan-track-origins=1 -o %t && setarch `uname -m` -R %run %t
 //
 // REQUIRES: x86_64-target-arch
 
 #include <assert.h>
 #include <sanitizer/dfsan_interface.h>
 #include <stdbool.h>
 #include <stdio.h>
 #include <string.h>
fprintf(
       stderr,
       "RSS at start: %zu, after mmap: %zu, after mmap+set label: %zu, after "
       "fixed map: %zu, after another mmap+set label: %zu, after munmap: %zu\n",
       before, after_mmap, after_mmap_and_set_label, after_fixed_mmap,
       after_mmap_and_set_label2, after_munmap);
 
   const size_t mmap_cost_kb = map_size >> 10;
   const size_t mmap_shadow_cost_kb = sizeof(dfsan_label) * mmap_cost_kb;
+#ifdef ORIGIN_TRACKING
+  const size_t mmap_origin_cost_kb = mmap_cost_kb;
+#else
+  const size_t mmap_origin_cost_kb = 0;
+#endif
   assert(after_mmap >= before + mmap_cost_kb);
-  assert(after_mmap_and_set_label >= after_mmap + mmap_shadow_cost_kb);
-  assert(after_mmap_and_set_label2 >= before + mmap_cost_kb + mmap_shadow_cost_kb);
+  assert(after_mmap_and_set_label >=
+         after_mmap + mmap_shadow_cost_kb + mmap_origin_cost_kb);
+  assert(after_mmap_and_set_label2 >=
+         before + mmap_cost_kb + mmap_shadow_cost_kb + mmap_origin_cost_kb);
 
   // RSS may not change memory amount after munmap to the same level as the
   // start of the program. The assert checks the memory up to a delta.
   const size_t delta = 5000;
   assert(after_fixed_mmap <= before + delta);
   assert(after_munmap <= before + delta);
 
   return 0;
 }