bpo-38852: Set thread stack size to 8 Mb for debug builds on android platforms (GH-17337)

Misc/NEWS.d/next/Core and Builtins/2019-11-22-09-55-21.bpo-38852.y7oPEa.rst

@@ -0,0 +1 @@
+Set the thread stack size to 8 Mb for debug builds on android platforms.

Python/thread_pthread.h

@@ -51,6 +51,16 @@
 #undef  THREAD_STACK_SIZE
 #define THREAD_STACK_SIZE       0x200000
 #endif
+/* bpo-38852: test_threading.test_recursion_limit() checks that 1000 recursive
+   Python calls (default recursion limit) doesn't crash, but raise a regular
+   RecursionError exception. In debug mode, Python function calls allocates
+   more memory on the stack, so use a stack of 8 MiB. */
+#if defined(__ANDROID__) && defined(THREAD_STACK_SIZE) && THREAD_STACK_SIZE == 0
+#   ifdef Py_DEBUG
+#   undef  THREAD_STACK_SIZE
+#   define THREAD_STACK_SIZE    0x800000
+#   endif
+#endif
 /* for safety, ensure a viable minimum stacksize */
 #define THREAD_STACK_MIN        0x8000  /* 32 KiB */
 #else  /* !_POSIX_THREAD_ATTR_STACKSIZE */