Add memorymonitor module

16 files changed, 905 insertions, 0 deletions

diff --git a/py/circuitpy_defns.mk b/py/circuitpy_defns.mk
index 815ee2e62..a39e0c9dd 100644
--- a/py/circuitpy_defns.mk
+++ b/py/circuitpy_defns.mk
@@ -174,6 +174,9 @@ endif
 ifeq ($(CIRCUITPY__EVE),1)
 SRC_PATTERNS += _eve/%
 endif
+ifeq ($(CIRCUITPY_MEMORYMONITOR),1)
+SRC_PATTERNS += memorymonitor/%
+endif
 ifeq ($(CIRCUITPY_MICROCONTROLLER),1)
 SRC_PATTERNS += microcontroller/%
 endif
@@ -398,6 +401,9 @@ SRC_SHARED_MODULE_ALL = \
 	gamepad/__init__.c \
 	gamepadshift/GamePadShift.c \
 	gamepadshift/__init__.c \
+	memorymonitor/__init__.c \
+	memorymonitor/AllocationAlarm.c \
+	memorymonitor/AllocationSize.c \
 	network/__init__.c \
 	os/__init__.c \
 	random/__init__.c \
diff --git a/py/circuitpy_mpconfig.h b/py/circuitpy_mpconfig.h
index d05a246fc..3c2df37ff 100644
--- a/py/circuitpy_mpconfig.h
+++ b/py/circuitpy_mpconfig.h
@@ -429,6 +429,16 @@ extern const struct _mp_obj_module_t _eve_module;
 #define _EVE_MODULE
 #endif
 
+#if CIRCUITPY_MEMORYMONITOR
+extern const struct _mp_obj_module_t memorymonitor_module;
+#define MEMORYMONITOR_MODULE { MP_OBJ_NEW_QSTR(MP_QSTR_memorymonitor), (mp_obj_t)&memorymonitor_module },
+#define MEMORYMONITOR_ROOT_POINTERS mp_obj_t active_allocationsizes; \
+                                    mp_obj_t active_allocationalarms;
+#else
+#define MEMORYMONITOR_MODULE
+#define MEMORYMONITOR_ROOT_POINTERS
+#endif
+
 #if CIRCUITPY_MICROCONTROLLER
 extern const struct _mp_obj_module_t microcontroller_module;
 #define MICROCONTROLLER_MODULE { MP_OBJ_NEW_QSTR(MP_QSTR_microcontroller), (mp_obj_t)&microcontroller_module },
@@ -708,6 +718,7 @@ extern const struct _mp_obj_module_t watchdog_module;
     JSON_MODULE \
     MATH_MODULE \
     _EVE_MODULE \
+    MEMORYMONITOR_MODULE \
     MICROCONTROLLER_MODULE \
     NEOPIXEL_WRITE_MODULE \
     NETWORK_MODULE \
@@ -765,6 +776,7 @@ extern const struct _mp_obj_module_t watchdog_module;
     mp_obj_t terminal_tilegrid_tiles; \
     BOARD_UART_ROOT_POINTER \
     FLASH_ROOT_POINTERS \
+    MEMORYMONITOR_ROOT_POINTERS \
     NETWORK_ROOT_POINTERS \
 
 void supervisor_run_background_tasks_if_tick(void);
diff --git a/py/circuitpy_mpconfig.mk b/py/circuitpy_mpconfig.mk
index 2d4a5ecee..baa29e26b 100644
--- a/py/circuitpy_mpconfig.mk
+++ b/py/circuitpy_mpconfig.mk
@@ -118,6 +118,9 @@ CFLAGS += -DCIRCUITPY_MATH=$(CIRCUITPY_MATH)
 CIRCUITPY__EVE ?= 0
 CFLAGS += -DCIRCUITPY__EVE=$(CIRCUITPY__EVE)
 
+CIRCUITPY_MEMORYMONITOR ?= 0
+CFLAGS += -DCIRCUITPY_MEMORYMONITOR=$(CIRCUITPY_MEMORYMONITOR)
+
 CIRCUITPY_MICROCONTROLLER ?= 1
 CFLAGS += -DCIRCUITPY_MICROCONTROLLER=$(CIRCUITPY_MICROCONTROLLER)
 
diff --git a/py/gc.c b/py/gc.c
index 2f3f63522..0f08ffb2e 100755
--- a/py/gc.c
+++ b/py/gc.c
@@ -33,6 +33,10 @@
 
 #include "supervisor/shared/safe_mode.h"
 
+#if CIRCUITPY_MEMORYMONITOR
+#include "shared-module/memorymonitor/AllocationSize.h"
+#endif
+
 #if MICROPY_ENABLE_GC
 
 #if MICROPY_DEBUG_VERBOSE // print debugging info
@@ -653,6 +657,10 @@ void *gc_alloc(size_t n_bytes, bool has_finaliser, bool long_lived) {
     gc_dump_alloc_table();
     #endif
 
+    #if CIRCUITPY_MEMORYMONITOR
+    memorymonitor_allocationsizes_track_allocation(end_block - start_block + 1);
+    #endif
+
     return ret_ptr;
 }
 
@@ -906,6 +914,10 @@ void *gc_realloc(void *ptr_in, size_t n_bytes, bool allow_move) {
         gc_log_change(block, new_blocks);
         #endif
 
+        #if CIRCUITPY_MEMORYMONITOR
+        memorymonitor_allocationsizes_track_allocation(new_blocks);
+        #endif
+
         return ptr_in;
     }
 
@@ -935,6 +947,10 @@ void *gc_realloc(void *ptr_in, size_t n_bytes, bool allow_move) {
         gc_log_change(block, new_blocks);
         #endif
 
+        #if CIRCUITPY_MEMORYMONITOR
+        memorymonitor_allocationsizes_track_allocation(new_blocks);
+        #endif
+
         return ptr_in;
     }
 
diff --git a/shared-bindings/memorymonitor/AllocationAlarm.c b/shared-bindings/memorymonitor/AllocationAlarm.c
new file mode 100644
index 000000000..836bf7833
--- /dev/null
+++ b/shared-bindings/memorymonitor/AllocationAlarm.c
@@ -0,0 +1,113 @@
+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <stdint.h>
+
+#include "py/objproperty.h"
+#include "py/runtime.h"
+#include "py/runtime0.h"
+#include "shared-bindings/memorymonitor/AllocationAlarm.h"
+#include "shared-bindings/util.h"
+#include "supervisor/shared/translate.h"
+
+//| class AllocationAlarm:
+//|
+//|     def __init__(self, *, minimum_block_count=1):
+//|         """Throw an exception when an allocation of ``minimum_block_count`` or more blocks
+//|            occurs while active.
+//|
+//|         Track allocations::
+//|
+//|           import memorymonitor
+//|
+//|           aa = memorymonitor.AllocationAlarm(minimum_block_count=2)
+//|           x = 2
+//|           # Should not allocate any blocks.
+//|           with aa:
+//|               x = 5
+//|
+//|           # Should throw an exception when allocating storage for the 20 bytes.
+//|           with aa:
+//|               x = bytearray(20)
+//|
+//|         """
+//|         ...
+//|
+STATIC mp_obj_t memorymonitor_allocationalarm_make_new(const mp_obj_type_t *type, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+    enum { ARG_minimum_block_count };
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_minimum_block_count, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 1} },
+    };
+    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
+    mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
+    mp_int_t minimum_block_count = args[ARG_minimum_block_count].u_int;
+    if (minimum_block_count < 1) {
+        mp_raise_ValueError_varg(translate("%q must be >= 1"), MP_QSTR_minimum_block_count);
+    }
+
+    memorymonitor_allocationalarm_obj_t *self = m_new_obj(memorymonitor_allocationalarm_obj_t);
+    self->base.type = &memorymonitor_allocationalarm_type;
+
+    common_hal_memorymonitor_allocationalarm_construct(self, minimum_block_count);
+
+    return MP_OBJ_FROM_PTR(self);
+}
+
+//|     def __enter__(self) -> memorymonitor.AllocationAlarm:
+//|         """Enables the alarm."""
+//|         ...
+//|
+STATIC mp_obj_t memorymonitor_allocationalarm_obj___enter__(mp_obj_t self_in) {
+    common_hal_memorymonitor_allocationalarm_resume(self_in);
+    return self_in;
+}
+MP_DEFINE_CONST_FUN_OBJ_1(memorymonitor_allocationalarm___enter___obj, memorymonitor_allocationalarm_obj___enter__);
+
+//|     def __exit__(self) -> None:
+//|         """Automatically disables the allocation alarm when exiting a context. See
+//|         :ref:`lifetime-and-contextmanagers` for more info."""
+//|         ...
+//|
+STATIC mp_obj_t memorymonitor_allocationalarm_obj___exit__(size_t n_args, const mp_obj_t *args) {
+    (void)n_args;
+    common_hal_memorymonitor_allocationalarm_pause(args[0]);
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(memorymonitor_allocationalarm___exit___obj, 4, 4, memorymonitor_allocationalarm_obj___exit__);
+
+STATIC const mp_rom_map_elem_t memorymonitor_allocationalarm_locals_dict_table[] = {
+    // Methods
+    { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&memorymonitor_allocationalarm___enter___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&memorymonitor_allocationalarm___exit___obj) },
+};
+STATIC MP_DEFINE_CONST_DICT(memorymonitor_allocationalarm_locals_dict, memorymonitor_allocationalarm_locals_dict_table);
+
+const mp_obj_type_t memorymonitor_allocationalarm_type = {
+    { &mp_type_type },
+    .name = MP_QSTR_AllocationAlarm,
+    .make_new = memorymonitor_allocationalarm_make_new,
+    .locals_dict = (mp_obj_dict_t*)&memorymonitor_allocationalarm_locals_dict,
+};
diff --git a/shared-bindings/memorymonitor/AllocationAlarm.h b/shared-bindings/memorymonitor/AllocationAlarm.h
new file mode 100644
index 000000000..40f5a48c5
--- /dev/null
+++ b/shared-bindings/memorymonitor/AllocationAlarm.h
@@ -0,0 +1,38 @@
+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_MEMORYMONITOR_ALLOCATIONALARM_H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_MEMORYMONITOR_ALLOCATIONALARM_H
+
+#include "shared-module/memorymonitor/AllocationAlarm.h"
+
+extern const mp_obj_type_t memorymonitor_allocationalarm_type;
+
+void common_hal_memorymonitor_allocationalarm_construct(memorymonitor_allocationalarm_obj_t* self, size_t minimum_block_count);
+void common_hal_memorymonitor_allocationalarm_pause(memorymonitor_allocationalarm_obj_t* self);
+void common_hal_memorymonitor_allocationalarm_resume(memorymonitor_allocationalarm_obj_t* self);
+
+#endif // MICROPY_INCLUDED_SHARED_BINDINGS_MEMORYMONITOR_ALLOCATIONALARM_H
diff --git a/shared-bindings/memorymonitor/AllocationSize.c b/shared-bindings/memorymonitor/AllocationSize.c
new file mode 100644
index 000000000..411e27e15
--- /dev/null
+++ b/shared-bindings/memorymonitor/AllocationSize.c
@@ -0,0 +1,222 @@
+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <stdint.h>
+
+#include "py/objproperty.h"
+#include "py/runtime.h"
+#include "py/runtime0.h"
+#include "shared-bindings/memorymonitor/AllocationSize.h"
+#include "shared-bindings/util.h"
+#include "supervisor/shared/translate.h"
+
+//| class AllocationSize:
+//|
+//|     def __init__(self):
+//|         """Tracks the number of allocations in power of two buckets.
+//|
+//|         It will have 32 16bit buckets to track allocation counts. It is total allocations
+//|         meaning frees are ignored. Reallocated memory is counted twice, at allocation and when
+//|         reallocated with the larger size.
+//|
+//|         The buckets are measured in terms of blocks which is the finest granularity of the heap.
+//|         This means bucket 0 will count all allocations less than or equal to the number of bytes
+//|         per block, typically 16. Bucket 2 will be less than or equal to 4 blocks. See
+//|         `bytes_per_block` to convert blocks to bytes.
+//|
+//|         Multiple AllocationSizes can be used to track different boundaries.
+//|
+//|         Active AllocationSizes will not be freed so make sure and pause before deleting.
+//|
+//|         Track allocations::
+//|
+//|           import memorymonitor
+//|
+//|           mm = memorymonitor.AllocationSizes()
+//|           print("hello world" * 3)
+//|           mm.pause()
+//|           for bucket in mm:
+//|               print("<", 2 ** bucket, mm[bucket])
+//|
+//|           # Clear the buckets
+//|           mm.clear()
+//|
+//|           # Resume allocation tracking
+//|           mm.resume()"""
+//|         ...
+//|
+STATIC mp_obj_t memorymonitor_allocationsize_make_new(const mp_obj_type_t *type, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+    memorymonitor_allocationsize_obj_t *self = m_new_obj(memorymonitor_allocationsize_obj_t);
+    self->base.type = &memorymonitor_allocationsize_type;
+
+    common_hal_memorymonitor_allocationsize_construct(self);
+
+    return MP_OBJ_FROM_PTR(self);
+}
+
+//|     def __enter__(self, ) -> Any:
+//|         """No-op used by Context Managers."""
+//|         ...
+//|
+STATIC mp_obj_t memorymonitor_allocationsize_obj___enter__(mp_obj_t self_in) {
+    common_hal_memorymonitor_allocationsize_resume(self_in);
+    return self_in;
+}
+MP_DEFINE_CONST_FUN_OBJ_1(memorymonitor_allocationsize___enter___obj, memorymonitor_allocationsize_obj___enter__);
+
+//|     def __exit__(self, ) -> Any:
+//|         """Automatically pauses allocation tracking when exiting a context. See
+//|         :ref:`lifetime-and-contextmanagers` for more info."""
+//|         ...
+//|
+STATIC mp_obj_t memorymonitor_allocationsize_obj___exit__(size_t n_args, const mp_obj_t *args) {
+    (void)n_args;
+    common_hal_memorymonitor_allocationsize_pause(args[0]);
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(memorymonitor_allocationsize___exit___obj, 4, 4, memorymonitor_allocationsize_obj___exit__);
+
+//|     def pause(self) -> None:
+//|         """Pause allocation tracking"""
+//|         ...
+//|
+STATIC mp_obj_t memorymonitor_allocationsize_obj_pause(mp_obj_t self_in) {
+    memorymonitor_allocationsize_obj_t *self = MP_OBJ_TO_PTR(self_in);
+
+    common_hal_memorymonitor_allocationsize_pause(self);
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_1(memorymonitor_allocationsize_pause_obj, memorymonitor_allocationsize_obj_pause);
+
+//|     def resume(self) -> None:
+//|         """Resumes allocation tracking."""
+//|         ...
+//|
+STATIC mp_obj_t memorymonitor_allocationsize_obj_resume(mp_obj_t self_in) {
+    common_hal_memorymonitor_allocationsize_resume(self_in);
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_1(memorymonitor_allocationsize_resume_obj, memorymonitor_allocationsize_obj_resume);
+
+//|     def clear(self) -> Any:
+//|         """Clears all captured pulses"""
+//|         ...
+//|
+STATIC mp_obj_t memorymonitor_allocationsize_obj_clear(mp_obj_t self_in) {
+    memorymonitor_allocationsize_obj_t *self = MP_OBJ_TO_PTR(self_in);
+
+    common_hal_memorymonitor_allocationsize_clear(self);
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_1(memorymonitor_allocationsize_clear_obj, memorymonitor_allocationsize_obj_clear);
+
+
+//|     bytes_per_block: int = ...
+//|     """Number of bytes per block"""
+//|
+STATIC mp_obj_t memorymonitor_allocationsize_obj_get_bytes_per_block(mp_obj_t self_in) {
+    memorymonitor_allocationsize_obj_t *self = MP_OBJ_TO_PTR(self_in);
+
+    return mp_obj_new_bool(common_hal_memorymonitor_allocationsize_get_bytes_per_block(self));
+}
+MP_DEFINE_CONST_FUN_OBJ_1(memorymonitor_allocationsize_get_bytes_per_block_obj, memorymonitor_allocationsize_obj_get_bytes_per_block);
+
+const mp_obj_property_t memorymonitor_allocationsize_bytes_per_block_obj = {
+    .base.type = &mp_type_property,
+    .proxy = {(mp_obj_t)&memorymonitor_allocationsize_get_bytes_per_block_obj,
+              (mp_obj_t)&mp_const_none_obj,
+              (mp_obj_t)&mp_const_none_obj},
+};
+
+//|     def __len__(self, ) -> Any:
+//|         """Returns the current pulse length
+//|
+//|         This allows you to::
+//|
+//|           pulses = pulseio.PulseIn(pin)
+//|           print(len(pulses))"""
+//|         ...
+//|
+STATIC mp_obj_t memorymonitor_allocationsize_unary_op(mp_unary_op_t op, mp_obj_t self_in) {
+    memorymonitor_allocationsize_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    uint16_t len = common_hal_memorymonitor_allocationsize_get_len(self);
+    switch (op) {
+        case MP_UNARY_OP_BOOL: return mp_obj_new_bool(len != 0);
+        case MP_UNARY_OP_LEN: return MP_OBJ_NEW_SMALL_INT(len);
+        default: return MP_OBJ_NULL; // op not supported
+    }
+}
+
+//|     def __getitem__(self, index: Any) -> Any:
+//|         """Returns the value at the given index or values in slice.
+//|
+//|         This allows you to::
+//|
+//|           pulses = pulseio.PulseIn(pin)
+//|           print(pulses[0])"""
+//|         ...
+//|
+STATIC mp_obj_t memorymonitor_allocationsize_subscr(mp_obj_t self_in, mp_obj_t index_obj, mp_obj_t value) {
+    if (value == mp_const_none) {
+        // delete item
+        mp_raise_AttributeError(translate("Cannot delete values"));
+    } else {
+        memorymonitor_allocationsize_obj_t *self = MP_OBJ_TO_PTR(self_in);
+
+        if (MP_OBJ_IS_TYPE(index_obj, &mp_type_slice)) {
+            mp_raise_NotImplementedError(translate("Slices not supported"));
+        } else {
+            size_t index = mp_get_index(&memorymonitor_allocationsize_type, common_hal_memorymonitor_allocationsize_get_len(self), index_obj, false);
+            if (value == MP_OBJ_SENTINEL) {
+                // load
+                return MP_OBJ_NEW_SMALL_INT(common_hal_memorymonitor_allocationsize_get_item(self, index));
+            } else {
+                mp_raise_AttributeError(translate("Read-only"));
+            }
+        }
+    }
+    return mp_const_none;
+}
+
+STATIC const mp_rom_map_elem_t memorymonitor_allocationsize_locals_dict_table[] = {
+    // Methods
+    { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&memorymonitor_allocationsize___enter___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&memorymonitor_allocationsize___exit___obj) },
+
+    // Properties
+    { MP_ROM_QSTR(MP_QSTR_bytes_per_block), MP_ROM_PTR(&memorymonitor_allocationsize_bytes_per_block_obj) },
+};
+STATIC MP_DEFINE_CONST_DICT(memorymonitor_allocationsize_locals_dict, memorymonitor_allocationsize_locals_dict_table);
+
+const mp_obj_type_t memorymonitor_allocationsize_type = {
+    { &mp_type_type },
+    .name = MP_QSTR_AllocationSize,
+    .make_new = memorymonitor_allocationsize_make_new,
+    .subscr = memorymonitor_allocationsize_subscr,
+    .unary_op = memorymonitor_allocationsize_unary_op,
+    .getiter = mp_obj_new_generic_iterator,
+    .locals_dict = (mp_obj_dict_t*)&memorymonitor_allocationsize_locals_dict,
+};
diff --git a/shared-bindings/memorymonitor/AllocationSize.h b/shared-bindings/memorymonitor/AllocationSize.h
new file mode 100644
index 000000000..bcd9514bf
--- /dev/null
+++ b/shared-bindings/memorymonitor/AllocationSize.h
@@ -0,0 +1,42 @@
+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_MEMORYMONITOR_ALLOCATIONSIZE_H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_MEMORYMONITOR_ALLOCATIONSIZE_H
+
+#include "shared-module/memorymonitor/AllocationSize.h"
+
+extern const mp_obj_type_t memorymonitor_allocationsize_type;
+
+extern void common_hal_memorymonitor_allocationsize_construct(memorymonitor_allocationsize_obj_t* self);
+extern void common_hal_memorymonitor_allocationsize_pause(memorymonitor_allocationsize_obj_t* self);
+extern void common_hal_memorymonitor_allocationsize_resume(memorymonitor_allocationsize_obj_t* self);
+extern void common_hal_memorymonitor_allocationsize_clear(memorymonitor_allocationsize_obj_t* self);
+extern size_t common_hal_memorymonitor_allocationsize_get_bytes_per_block(memorymonitor_allocationsize_obj_t* self);
+extern uint16_t common_hal_memorymonitor_allocationsize_get_len(memorymonitor_allocationsize_obj_t* self);
+extern uint16_t common_hal_memorymonitor_allocationsize_get_item(memorymonitor_allocationsize_obj_t* self, int16_t index);
+
+#endif // MICROPY_INCLUDED_SHARED_BINDINGS_MEMORYMONITOR_ALLOCATIONSIZE_H
diff --git a/shared-bindings/memorymonitor/__init__.c b/shared-bindings/memorymonitor/__init__.c
new file mode 100644
index 000000000..bfd5bf6d8
--- /dev/null
+++ b/shared-bindings/memorymonitor/__init__.c
@@ -0,0 +1,77 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Scott Shawcroft
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <stdint.h>
+
+#include "py/obj.h"
+#include "py/runtime.h"
+
+#include "shared-bindings/memorymonitor/__init__.h"
+#include "shared-bindings/memorymonitor/AllocationAlarm.h"
+#include "shared-bindings/memorymonitor/AllocationSize.h"
+
+//| """Memory monitoring helpers"""
+//|
+
+//| class AllocationException:
+//|     def __init__(self, Exception: Any):
+//|         """Catch all exception for Bluetooth related errors."""
+//|         ...
+MP_DEFINE_MEMORYMONITOR_EXCEPTION(AllocationError, Exception)
+
+NORETURN void mp_raise_memorymonitor_AllocationError(const compressed_string_t* fmt, ...) {
+    va_list argptr;
+    va_start(argptr,fmt);
+    mp_obj_t exception = mp_obj_new_exception_msg_vlist(&mp_type_memorymonitor_AllocationError, fmt, argptr);
+    va_end(argptr);
+    nlr_raise(exception);
+}
+
+STATIC const mp_rom_map_elem_t memorymonitor_module_globals_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_memorymonitor) },
+    { MP_ROM_QSTR(MP_QSTR_AllocationAlarm), MP_ROM_PTR(&memorymonitor_allocationalarm_type) },
+    { MP_ROM_QSTR(MP_QSTR_AllocationSize), MP_ROM_PTR(&memorymonitor_allocationsize_type) },
+
+    // Errors
+    { MP_ROM_QSTR(MP_QSTR_AllocationError),      MP_ROM_PTR(&mp_type_memorymonitor_AllocationError) },
+};
+
+STATIC MP_DEFINE_CONST_DICT(memorymonitor_module_globals, memorymonitor_module_globals_table);
+
+void memorymonitor_exception_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t kind) {
+    mp_print_kind_t k = kind & ~PRINT_EXC_SUBCLASS;
+    bool is_subclass = kind & PRINT_EXC_SUBCLASS;
+    if (!is_subclass && (k == PRINT_EXC)) {
+        mp_print_str(print, qstr_str(MP_OBJ_QSTR_VALUE(memorymonitor_module_globals_table[0].value)));
+        mp_print_str(print, ".");
+    }
+    mp_obj_exception_print(print, o_in, kind);
+}
+
+const mp_obj_module_t memorymonitor_module = {
+    .base = { &mp_type_module },
+    .globals = (mp_obj_dict_t*)&memorymonitor_module_globals,
+};
diff --git a/shared-bindings/memorymonitor/__init__.h b/shared-bindings/memorymonitor/__init__.h
new file mode 100644
index 000000000..60fcdc3f6
--- /dev/null
+++ b/shared-bindings/memorymonitor/__init__.h
@@ -0,0 +1,49 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016 Scott Shawcroft
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_MEMORYMONITOR___INIT___H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_MEMORYMONITOR___INIT___H
+
+#include "py/obj.h"
+
+
+void memorymonitor_exception_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t kind);
+
+#define MP_DEFINE_MEMORYMONITOR_EXCEPTION(exc_name, base_name) \
+const mp_obj_type_t mp_type_memorymonitor_ ## exc_name = { \
+    { &mp_type_type }, \
+    .name = MP_QSTR_ ## exc_name, \
+    .print = memorymonitor_exception_print, \
+    .make_new = mp_obj_exception_make_new, \
+    .attr = mp_obj_exception_attr, \
+    .parent = &mp_type_ ## base_name, \
+};
+
+extern const mp_obj_type_t mp_type_memorymonitor_AllocationError;
+
+NORETURN void mp_raise_memorymonitor_AllocationError(const compressed_string_t* msg, ...);
+
+#endif  // MICROPY_INCLUDED_SHARED_BINDINGS_MEMORYMONITOR___INIT___H
diff --git a/shared-module/memorymonitor/AllocationAlarm.c b/shared-module/memorymonitor/AllocationAlarm.c
new file mode 100644
index 000000000..bbd33f2b0
--- /dev/null
+++ b/shared-module/memorymonitor/AllocationAlarm.c
@@ -0,0 +1,73 @@
+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "shared-bindings/memorymonitor/__init__.h"
+#include "shared-bindings/memorymonitor/AllocationAlarm.h"
+
+#include "py/gc.h"
+#include "py/mpstate.h"
+#include "py/runtime.h"
+
+void common_hal_memorymonitor_allocationalarm_construct(memorymonitor_allocationalarm_obj_t* self, size_t minimum_block_count) {
+    self->minimum_block_count = minimum_block_count;
+    self->next = NULL;
+    self->previous = NULL;
+}
+
+void common_hal_memorymonitor_allocationalarm_pause(memorymonitor_allocationalarm_obj_t* self) {
+    *self->previous = self->next;
+    self->next = NULL;
+    self->previous = NULL;
+}
+
+void common_hal_memorymonitor_allocationalarm_resume(memorymonitor_allocationalarm_obj_t* self) {
+    if (self->previous != NULL) {
+        mp_raise_RuntimeError(translate("Already running"));
+    }
+    self->next = MP_STATE_VM(active_allocationalarms);
+    self->previous = (memorymonitor_allocationalarm_obj_t**) &MP_STATE_VM(active_allocationalarms);
+    if (self->next != NULL) {
+        self->next->previous = &self->next;
+    }
+    MP_STATE_VM(active_allocationalarms) = self;
+}
+
+void memorymonitor_allocationalarms_allocation(size_t block_count) {
+    memorymonitor_allocationalarm_obj_t* alarm = MP_OBJ_TO_PTR(MP_STATE_VM(active_allocationalarms));
+    size_t alert_count = 0;
+    while (alarm != NULL) {
+        // Hold onto next in case we remove the alarm from the list.
+        memorymonitor_allocationalarm_obj_t* next = alarm->next;
+        if (block_count >= alarm->minimum_block_count) {
+            common_hal_memorymonitor_allocationalarm_pause(alarm);
+            alert_count++;
+        }
+        alarm = next;
+    }
+    if (alert_count > 0) {
+        mp_raise_memorymonitor_AllocationError(translate("Attempt to allocate %d blocks"), block_count);
+    }
+}
diff --git a/shared-module/memorymonitor/AllocationAlarm.h b/shared-module/memorymonitor/AllocationAlarm.h
new file mode 100644
index 000000000..ebdc0d801
--- /dev/null
+++ b/shared-module/memorymonitor/AllocationAlarm.h
@@ -0,0 +1,49 @@
+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_SHARED_MODULE_MEMORYMONITOR_ALLOCATIONALARM_H
+#define MICROPY_INCLUDED_SHARED_MODULE_MEMORYMONITOR_ALLOCATIONALARM_H
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#include "py/obj.h"
+
+typedef struct _memorymonitor_allocationalarm_obj_t memorymonitor_allocationalarm_obj_t;
+
+#define ALLOCATION_SIZE_BUCKETS 16
+
+typedef struct _memorymonitor_allocationalarm_obj_t {
+    mp_obj_base_t base;
+    size_t minimum_block_count;
+    // Store the location that points to us so we can remove ourselves.
+    memorymonitor_allocationalarm_obj_t** previous;
+    memorymonitor_allocationalarm_obj_t* next;
+} memorymonitor_allocationalarm_obj_t;
+
+void memorymonitor_allocationalarms_allocation(size_t block_count);
+
+#endif // MICROPY_INCLUDED_SHARED_MODULE_MEMORYMONITOR_ALLOCATIONALARM_H
diff --git a/shared-module/memorymonitor/AllocationSize.c b/shared-module/memorymonitor/AllocationSize.c
new file mode 100644
index 000000000..fb11471fd
--- /dev/null
+++ b/shared-module/memorymonitor/AllocationSize.c
@@ -0,0 +1,87 @@
+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "shared-bindings/memorymonitor/AllocationSize.h"
+
+#include "py/gc.h"
+#include "py/mpstate.h"
+#include "py/runtime.h"
+
+void common_hal_memorymonitor_allocationsize_construct(memorymonitor_allocationsize_obj_t* self) {
+    common_hal_memorymonitor_allocationsize_clear(self);
+    self->next = NULL;
+    self->previous = NULL;
+}
+
+void common_hal_memorymonitor_allocationsize_pause(memorymonitor_allocationsize_obj_t* self) {
+    *self->previous = self->next;
+    self->next = NULL;
+    self->previous = NULL;
+}
+
+void common_hal_memorymonitor_allocationsize_resume(memorymonitor_allocationsize_obj_t* self) {
+    if (self->previous != NULL) {
+        mp_raise_RuntimeError(translate("Already running"));
+    }
+    self->next = MP_STATE_VM(active_allocationsizes);
+    self->previous = (memorymonitor_allocationsize_obj_t**) &MP_STATE_VM(active_allocationsizes);
+    if (self->next != NULL) {
+        self->next->previous = &self->next;
+    }
+    MP_STATE_VM(active_allocationsizes) = self;
+}
+
+void common_hal_memorymonitor_allocationsize_clear(memorymonitor_allocationsize_obj_t* self) {
+    for (size_t i = 0; i < ALLOCATION_SIZE_BUCKETS; i++) {
+        self->buckets[i] = 0;
+    }
+}
+
+uint16_t common_hal_memorymonitor_allocationsize_get_len(memorymonitor_allocationsize_obj_t* self) {
+    return ALLOCATION_SIZE_BUCKETS;
+}
+
+size_t common_hal_memorymonitor_allocationsize_get_bytes_per_block(memorymonitor_allocationsize_obj_t* self) {
+    return BYTES_PER_BLOCK;
+}
+
+uint16_t common_hal_memorymonitor_allocationsize_get_item(memorymonitor_allocationsize_obj_t* self, int16_t index) {
+    return self->buckets[index];
+}
+
+void memorymonitor_allocationsizes_track_allocation(size_t block_count) {
+    memorymonitor_allocationsize_obj_t* as = MP_OBJ_TO_PTR(MP_STATE_VM(active_allocationsizes));
+    size_t power_of_two = 0;
+    block_count >>= 1;
+    while (block_count != 0) {
+        power_of_two++;
+        block_count >>= 1;
+    }
+    while (as != NULL) {
+        as->buckets[power_of_two]++;
+        as = as->next;
+    }
+}
diff --git a/shared-module/memorymonitor/AllocationSize.h b/shared-module/memorymonitor/AllocationSize.h
new file mode 100644
index 000000000..3fa4e0465
--- /dev/null
+++ b/shared-module/memorymonitor/AllocationSize.h
@@ -0,0 +1,50 @@
+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_SHARED_MODULE_MEMORYMONITOR_ALLOCATIONSIZE_H
+#define MICROPY_INCLUDED_SHARED_MODULE_MEMORYMONITOR_ALLOCATIONSIZE_H
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#include "py/obj.h"
+
+typedef struct _memorymonitor_allocationsize_obj_t memorymonitor_allocationsize_obj_t;
+
+#define ALLOCATION_SIZE_BUCKETS 16
+
+typedef struct _memorymonitor_allocationsize_obj_t {
+    mp_obj_base_t base;
+    uint16_t buckets[ALLOCATION_SIZE_BUCKETS];
+    // Store the location that points to us so we can remove ourselves.
+    memorymonitor_allocationsize_obj_t** previous;
+    memorymonitor_allocationsize_obj_t* next;
+    bool paused;
+} memorymonitor_allocationsize_obj_t;
+
+void memorymonitor_allocationsizes_track_allocation(size_t block_count);
+
+#endif // MICROPY_INCLUDED_SHARED_MODULE_MEMORYMONITOR_ALLOCATIONSIZE_H
diff --git a/shared-module/memorymonitor/__init__.c b/shared-module/memorymonitor/__init__.c
new file mode 100644
index 000000000..4c24c2587
--- /dev/null
+++ b/shared-module/memorymonitor/__init__.c
@@ -0,0 +1,34 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Scott Shawcroft
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "shared-module/memorymonitor/__init__.h"
+#include "shared-module/memorymonitor/AllocationAlarm.h"
+#include "shared-module/memorymonitor/AllocationSize.h"
+
+void memorymonitor_track_allocation(size_t block_count) {
+    memorymonitor_allocationalarms_allocation(block_count);
+    memorymonitor_allocationsizes_track_allocation(block_count);
+}
diff --git a/shared-module/memorymonitor/__init__.h b/shared-module/memorymonitor/__init__.h
new file mode 100644
index 000000000..cf76f88f8
--- /dev/null
+++ b/shared-module/memorymonitor/__init__.h
@@ -0,0 +1,34 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_MEMORYMONITOR___INIT___H
+#define MICROPY_INCLUDED_MEMORYMONITOR___INIT___H
+
+#include <stddef.h>
+
+void memorymonitor_track_allocation(size_t block_count);
+
+#endif  // MICROPY_INCLUDED_MEMORYMONITOR___INIT___H