diff --git a/libc/platform/bionic/malloc.h b/libc/platform/bionic/malloc.h
index ffc6d4a..da85cf5 100644
--- a/libc/platform/bionic/malloc.h
+++ b/libc/platform/bionic/malloc.h
@@ -130,36 +130,55 @@
   // Worth noting, the "libc.debug.gwp_asan.*.app_default" sysprops *do not*
   // apply to system apps. They use the "libc.debug.gwp_asan.*.system_default"
   // sysprops.
-  enum Action {
-    // Enable GWP-ASan. This is used by apps that have `gwpAsanMode=always` in
-    // the manifest.
-    TURN_ON_FOR_APP,
-    // Enable GWP-ASan, but only a small percentage of the time. This is used by
-    // system processes and system apps, and we use a lottery to determine which
-    // processes have GWP-ASan enabled. This allows us to mitigate system-wide
-    // memory overhead concerns, as each GWP-ASan enabled process uses ~70KiB of
-    // extra memory.
-    TURN_ON_WITH_SAMPLING,
-    // Don't enable GWP-ASan, unless overwritten by a system property or
-    // environment variable. This is used by apps that have `gwpAsanMode=never`
-    // in the manifest. Prior to Android 14, this also was used by non-system
-    // apps that didn't specify a `gwpAsanMode` in their manifest.
-    DONT_TURN_ON_UNLESS_OVERRIDDEN,
-    // Enable GWP-ASan, but only a small percentage of the time, and enable it
-    // in the non-crashing ("recoverable") mode. In Android 14, this is used by
-    // apps that don't specify `gwpAsanMode` (or use `gwpAsanMode=default`) in
-    // their manifest. GWP-ASan will detect heap memory safety bugs in this
-    // mode, and bug reports will be created by debuggerd, however the process
-    // will recover and continue to function as if the memory safety bug wasn't
-    // detected.
+  //
+  // In recoverable mode, GWP-ASan will detect heap memory safety bugs, and bug
+  // reports will be created by debuggerd, however the process will recover and
+  // continue to function as if the memory safety bug wasn't detected. This
+  // prevents any user-visible impact as apps and processes don't crash, and
+  // probably saves us some CPU time in restarting the process.
+  //
+  // Process sampling enables GWP-ASan, but only a small percentage of the time
+  // (~1%). This helps mitigate any recurring high-frequency problems in certain
+  // processes, as it's highly likely the next restart of said process won't
+  // have GWP-ASan. In addition, for system processes and system apps, this
+  // allows us to mitigate system-wide memory overhead concerns, as each
+  // GWP-ASan enabled process uses ~70KiB of extra memory.
+  enum Mode {
+    // Used by default for apps, or by those that have an explicit
+    // `gwpAsanMode=default` in the manifest.
     //
-    // In Android 15, this is the same as TURN_ON_WITH_SAMPLING, as GWP-ASan is
-    // only ever used in non-crashing mode (even for platform executables and
-    // system apps).
-    TURN_ON_FOR_APP_SAMPLED_NON_CRASHING,
+    // Result:
+    //  - Android 13 and before: GWP-ASan is not enabled.
+    //  - Android 14 and after: Enables GWP-ASan with process sampling in
+    //    recoverable mode.
+    APP_MANIFEST_DEFAULT = 3,
+    // This is used by apps that have `gwpAsanMode=always` in the manifest.
+    //
+    // Result:
+    //  - Android 14 and before: Enables GWP-ASan in non-recoverable mode,
+    //    without process sampling.
+    //  - Android 15 and after: Enables GWP-ASan in recoverable mode, without
+    //    process sampling.
+    APP_MANIFEST_ALWAYS = 0,
+    // This is used by apps that have `gwpAsanMode=never` in the manifest.
+    //
+    // Result:
+    //  - GWP-ASan is not enabled, unless it's force-enabled by a system
+    //    property or environment variable.
+    APP_MANIFEST_NEVER = 2,
+    // Used by system processes and system apps.
+    //
+    // Result:
+    //  - Android 14 and before: Enables GWP-ASan with process sampling in
+    //    non-recoverable mode.
+    //  - Android 15 and after: Enables GWP-ASan with process sampling in
+    //    recoverable mode.
+    SYSTEM_PROCESS_OR_SYSTEM_APP = 1,
+    // Next enum value = 4. Numbered non-sequentially above to preserve ABI
+    // stability, but now ordered more logically.
   };
 
-  Action desire = DONT_TURN_ON_UNLESS_OVERRIDDEN;
+  Mode mode = APP_MANIFEST_NEVER;
 } android_mallopt_gwp_asan_options_t;
 #pragma clang diagnostic pop
 // Manipulates bionic-specific handling of memory allocation APIs such as