diff --git a/libc/platform/bionic/malloc.h b/libc/platform/bionic/malloc.h
index 70fd273..29e4edc 100644
--- a/libc/platform/bionic/malloc.h
+++ b/libc/platform/bionic/malloc.h
@@ -91,6 +91,12 @@
   //   arg_size = sizeof(HeapTaggingLevel)
   M_SET_HEAP_TAGGING_LEVEL = 8,
 #define M_SET_HEAP_TAGGING_LEVEL M_SET_HEAP_TAGGING_LEVEL
+  // Query whether the current process is considered to be profileable by the
+  // Android platform. Result is assigned to the arg pointer's destination.
+  //   arg = bool*
+  //   arg_size = sizeof(bool)
+  M_GET_PROCESS_PROFILEABLE = 9,
+#define M_GET_PROCESS_PROFILEABLE M_GET_PROCESS_PROFILEABLE
 };
 
 enum HeapTaggingLevel {
diff --git a/libc/platform/bionic/reserved_signals.h b/libc/platform/bionic/reserved_signals.h
index f062b1c..fcfcaaf 100644
--- a/libc/platform/bionic/reserved_signals.h
+++ b/libc/platform/bionic/reserved_signals.h
@@ -39,7 +39,7 @@
 //   33 (__SIGRTMIN + 1)        libbacktrace
 //   34 (__SIGRTMIN + 2)        libcore
 //   35 (__SIGRTMIN + 3)        debuggerd
-//   36 (__SIGRTMIN + 4)        heapprofd native dumps
+//   36 (__SIGRTMIN + 4)        platform profiling (heapprofd)
 //   37 (__SIGRTMIN + 5)        coverage (libprofile-extras)
 //   38 (__SIGRTMIN + 6)        heapprofd ART managed heap dumps
 //
@@ -47,6 +47,7 @@
 // in <android/legacy_signal_inlines.h> to match.
 
 #define BIONIC_SIGNAL_DEBUGGER __SIGRTMIN + 3
+#define BIONIC_SIGNAL_PROFILER __SIGRTMIN + 4
 
 #define __SIGRT_RESERVED 7
 static inline __always_inline sigset64_t filter_reserved_signals(sigset64_t sigset, int how) {