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Angus Gratton 71044a4186 py/parse: Zero out dangling parse tree pointer to fix potential GC leak. 
This fixes a bug where a random Python object may become
un-garbage-collectable until an enclosing Python file (compiled on device)
finishes executing.

Details:

The mp_parse_tree_t structure is stored on the stack in top-level functions
such as parse_compile_execute() in pyexec.c (and others).

Although it quickly falls out of scope in these functions, it is usually
still in the current stack frame when the compiled code executes. (Compiler
dependent, but usually it's one stack push per function.)

This means if any Python object happens to allocate at the same address as
the (freed) root parse tree chunk, it's un-garbage-collectable as there's a
(dangling) pointer up the stack referencing this same address.

As reported by @GitHubsSilverBullet here:
https://github.com/orgs/micropython/discussions/14116#discussioncomment-8837214

This work was funded through GitHub Sponsors.

Signed-off-by: Angus Gratton <angus@redyak.com.au>
 		2024-03-22 10:49:20 +11:00
..
argcheck.c py: Remove the word "yet" from exception messages. 2022-12-06 13:34:52 +11:00
asmarm.c py/asm: Add ASM_NOT_REG and ASM_NEG_REG macros for unary ops. 2024-03-19 10:31:36 +11:00
asmarm.h py/asm: Add ASM_NOT_REG and ASM_NEG_REG macros for unary ops. 2024-03-19 10:31:36 +11:00
asmbase.c all: Fix spelling mistakes based on codespell check. 2023-04-27 18:03:06 +10:00
asmbase.h py/emit: Suppress unreachable bytecode/native code that follows jump. 2022-06-20 22:28:18 +10:00
asmthumb.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
asmthumb.h py/asm: Add ASM_NOT_REG and ASM_NEG_REG macros for unary ops. 2024-03-19 10:31:36 +11:00
asmx64.c py/asm: Add ASM_NOT_REG and ASM_NEG_REG macros for unary ops. 2024-03-19 10:31:36 +11:00
asmx64.h py/asm: Add ASM_NOT_REG and ASM_NEG_REG macros for unary ops. 2024-03-19 10:31:36 +11:00
asmx86.c py/asm: Add ASM_NOT_REG and ASM_NEG_REG macros for unary ops. 2024-03-19 10:31:36 +11:00
asmx86.h py/asm: Add ASM_NOT_REG and ASM_NEG_REG macros for unary ops. 2024-03-19 10:31:36 +11:00
asmxtensa.c py/asmxtensa: Optimise asm_xtensa_mov_reg_i32_optimised() for tiny ints. 2024-03-19 10:31:36 +11:00
asmxtensa.h py/asmxtensa: Optimise asm_xtensa_mov_reg_i32_optimised() for tiny ints. 2024-03-19 10:31:36 +11:00
bc.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
bc.h py/emitglue: Include fun_data_len in mp_raw_code_t only when saving. 2024-02-16 14:17:01 +11:00
bc0.h
…
binary.c py/binary: Support half-float 'e' format in struct pack/unpack. 2024-03-20 14:13:49 +11:00
binary.h
…
builtin.h py/makemoduledefs.py: Automatically declare delegation attr functions. 2023-06-14 19:03:46 +10:00
builtinevex.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
builtinhelp.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
builtinimport.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
compile.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
compile.h py: Pass in address to compiled module instead of returning it. 2022-12-08 12:27:23 +11:00
dynruntime.h py/emitglue: Introduce mp_proto_fun_t as a more general mp_raw_code_t. 2024-02-16 14:17:01 +11:00
dynruntime.mk py/dynruntime.mk: Allow building assembly source in natmods. 2022-08-11 14:00:13 +10:00
emit.h py/compile: Fix scope of assignment expression target in comprehensions. 2023-03-09 12:13:12 +11:00
emitbc.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
emitcommon.c py/compile: Fix scope of assignment expression target in comprehensions. 2023-03-09 12:13:12 +11:00
emitglue.c py/emitglue: Make mp_emit_glue_assign_native's fun_data arg a const ptr. 2024-02-22 11:27:33 +11:00
emitglue.h py/emitglue: Add explicit cast of proto_fun to uint8_t pointer. 2024-03-04 10:27:07 +11:00
emitinlinethumb.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
emitinlinextensa.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
emitnarm.c py/emitnative: Access qstr values using indirection table qstr_table. 2022-05-23 15:43:06 +10:00
emitnative.c py/emitnative: Implement viper unary ops positive, negative and invert. 2024-03-19 10:31:36 +11:00
emitnthumb.c py/emitnative: Access qstr values using indirection table qstr_table. 2022-05-23 15:43:06 +10:00
emitnx64.c py/emitnative: Access qstr values using indirection table qstr_table. 2022-05-23 15:43:06 +10:00
emitnx86.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
emitnxtensa.c py/emitnative: Access qstr values using indirection table qstr_table. 2022-05-23 15:43:06 +10:00
emitnxtensawin.c py/emitnative: Access qstr values using indirection table qstr_table. 2022-05-23 15:43:06 +10:00
formatfloat.c all: Fix various spelling mistakes found by codespell 2.2.6. 2023-10-03 11:24:50 +11:00
formatfloat.h
…
frozenmod.c
…
frozenmod.h py/builtin: Clean up and simplify import_stat and builtin_open config. 2022-05-25 13:04:45 +10:00
gc.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
gc.h py/gc: Add "max new split" value in result of gc.mem_free(). 2023-09-15 12:19:13 +10:00
grammar.h
…
lexer.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
lexer.h py/builtinevex: Handle invalid filenames for execfile. 2023-10-12 15:17:59 +11:00
make_root_pointers.py py/make_root_pointers: Add MP_REGISTER_ROOT_POINTER parser/generator. 2022-07-18 13:48:23 +10:00
makecompresseddata.py all: Fix spelling mistakes based on codespell check. 2023-04-27 18:03:06 +10:00
makemoduledefs.py py/makemoduledefs.py: Automatically declare delegation attr functions. 2023-06-14 19:03:46 +10:00
makeqstrdata.py py/qstr: Add support for MICROPY_QSTR_BYTES_IN_HASH=0. 2024-01-25 16:38:17 +11:00
makeqstrdefs.py py/makeqstrdefs.py: Stop generating temporary intermediate file. 2023-12-14 22:55:08 -08:00
makeversionhdr.py py/makeversionhdr.py: Reinstate MICROPY_GIT_HASH in mpversion.h. 2024-02-19 23:36:25 +11:00
malloc.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
map.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
misc.h py/misc: Remove m_new_obj[_var]_with_finaliser macros. 2024-02-20 10:33:09 +11:00
mkenv.mk windows: Use the MicroPython logo as application icon. 2023-11-07 17:22:52 +11:00
mkrules.cmake py/mkrules.mk: List hash files as byproducts. 2023-12-15 15:48:07 +11:00
mkrules.mk ports: Fix handling of paths containing spaces in Makefiles. 2024-01-24 10:43:18 +11:00
modarray.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
modbuiltins.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
modcmath.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
modcollections.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
moderrno.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
modgc.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
modio.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
modmath.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
modmicropython.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
modstruct.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
modsys.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
modthread.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
mpconfig.h py/binary: Support half-float 'e' format in struct pack/unpack. 2024-03-20 14:13:49 +11:00
mperrno.h all: Rename UMODULE to MODULE in preprocessor/Makefile vars. 2023-06-08 17:54:11 +10:00
mphal.h ports: Fix sys.stdout.buffer.write() return value. 2023-12-22 10:32:46 +11:00
mpprint.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
mpprint.h py/mpprint: Fix formatting typo with mp_print_ext_t struct name. 2022-08-10 14:30:47 +10:00
mpstate.c
…
mpstate.h py/mpstate: Don't declare mp_thread_get_state(). 2024-02-29 13:33:51 +11:00
mpthread.h py/modthread: Return thread id from start_new_thread(). 2023-09-03 18:49:18 +10:00
mpz.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
mpz.h
…
nativeglue.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
nativeglue.h py/emitglue: Introduce mp_proto_fun_t as a more general mp_raw_code_t. 2024-02-16 14:17:01 +11:00
nlr.c py/nlr: Implement jump callbacks. 2023-06-02 21:50:57 +10:00
nlr.h py/nlr: Implement jump callbacks. 2023-06-02 21:50:57 +10:00
nlraarch64.c py/nlraarch64: Fix dangerous use of input register. 2023-06-14 17:43:44 +10:00
nlrmips.c py/nlrmips: Add native NLR support for MIPS architecture. 2022-11-15 17:09:49 +11:00
nlrpowerpc.c py/nlrpowerpc: Fix generation of ppc64 code on ppc32 build. 2022-08-11 14:04:13 +10:00
nlrsetjmp.c py/nlrsetjmp: Use MP_NLR_JUMP_HEAD macro to simplify code. 2023-06-02 21:47:34 +10:00
nlrthumb.c
…
nlrx64.c py/nlrx64: Mark nlr_push() as naked function when possible. 2023-09-20 11:48:36 +10:00
nlrx86.c
…
nlrxtensa.c
…
obj.c py/obj: Introduce mp_obj_malloc_with_finaliser to allocate and set type. 2024-02-20 10:32:51 +11:00
obj.h py/objfun: Split viper fun type out to separate mp_type_fun_viper type. 2024-02-20 10:56:24 +11:00
objarray.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objarray.h py/objarray: Raise error on out-of-bound memoryview slice start. 2023-01-20 16:31:37 +11:00
objattrtuple.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objbool.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objboundmeth.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objcell.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objclosure.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objcomplex.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objdeque.c py/objdeque: Expand implementation to be doubly-ended and support iter. 2024-03-18 14:10:14 +11:00
objdict.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objenumerate.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objexcept.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objexcept.h py/obj: Convert make_new into a mp_obj_type_t slot. 2022-09-19 19:06:15 +10:00
objfilter.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objfloat.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objfun.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objfun.h py/emitnative: Simplify layout and loading of native function prelude. 2024-02-20 10:56:24 +11:00
objgenerator.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objgenerator.h
…
objgetitemiter.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objint.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objint.h
…
objint_longlong.c py: Change MP_UNARY_OP_INT to MP_UNARY_OP_INT_MAYBE. 2023-06-01 13:01:07 +10:00
objint_mpz.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objlist.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objlist.h py/obj: Convert make_new into a mp_obj_type_t slot. 2022-09-19 19:06:15 +10:00
objmap.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objmodule.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objmodule.h py/makemoduledefs.py: Automatically declare delegation attr functions. 2023-06-14 19:03:46 +10:00
objnamedtuple.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objnamedtuple.h py/obj: Convert make_new into a mp_obj_type_t slot. 2022-09-19 19:06:15 +10:00
objnone.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objobject.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objpolyiter.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objproperty.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objrange.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objreversed.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objset.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objsingleton.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objslice.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objstr.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objstr.h py/objstr: Add a macro to define a bytes object at compile time. 2024-03-15 13:37:31 +11:00
objstringio.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objstringio.h
…
objstrunicode.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objtuple.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objtuple.h
…
objtype.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
objtype.h py/obj: Optimise code size and performance for make_new as a slot. 2022-09-19 19:06:16 +10:00
objzip.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
opmethods.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
pairheap.c
…
pairheap.h
…
parse.c py/parse: Zero out dangling parse tree pointer to fix potential GC leak. 2024-03-22 10:49:20 +11:00
parse.h
…
parsenum.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
parsenum.h py/parsenum: Optimise when building with complex disabled. 2022-06-23 11:46:47 +10:00
parsenumbase.c
…
parsenumbase.h
…
persistentcode.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
persistentcode.h py/persistentcode: Bump .mpy sub-version. 2023-10-16 11:25:31 +11:00
profile.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
profile.h
…
py.cmake all: Rename *umodule*.c to remove the "u" prefix. 2023-06-08 17:54:17 +10:00
py.mk py/py.mk: Remove extra build dir created for frozen_content. 2024-01-17 08:14:15 +11:00
pystack.c
…
pystack.h
…
qstr.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
qstr.h py/qstr: Add support for MICROPY_QSTR_BYTES_IN_HASH=0. 2024-01-25 16:38:17 +11:00
qstrdefs.h
…
reader.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
reader.h py/builtinevex: Handle invalid filenames for execfile. 2023-10-12 15:17:59 +11:00
repl.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
repl.h
…
ringbuf.c py/ringbuf: Implement put_bytes/get_bytes functions. 2023-05-01 16:47:03 +10:00
ringbuf.h py/ringbuf: Implement put_bytes/get_bytes functions. 2023-05-01 16:47:03 +10:00
runtime.c extmod/machine_usb_device: Add support for Python USB devices. 2024-03-15 14:22:11 +11:00
runtime.h py/modthread: Move thread state initialisation to shared function. 2024-02-29 14:28:58 +01:00
runtime0.h py/emitglue: Simplify mp_raw_code_t's kind and scope_flags members. 2024-02-16 12:48:02 +11:00
runtime_utils.c
…
scheduler.c py: Add port-agnostic inline functions for event handling. 2023-12-08 12:47:00 +11:00
scope.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
scope.h py/emitglue: Include fun_data_len in mp_raw_code_t only when saving. 2024-02-16 14:17:01 +11:00
sequence.c all: Fix spelling mistakes based on codespell check. 2023-04-27 18:03:06 +10:00
showbc.c py/emitglue: Include fun_data_len in mp_raw_code_t only when saving. 2024-02-16 14:17:01 +11:00
smallint.c
…
smallint.h
…
stackctrl.c py/stackctrl: Add gcc pragmas to ignore dangling-pointer warning. 2023-05-04 10:08:12 +10:00
stackctrl.h
…
stream.c py/stream: Factor stream implementations. 2024-03-15 18:11:28 +11:00
stream.h py/stream: Factor stream implementations. 2024-03-15 18:11:28 +11:00
unicode.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
unicode.h
…
usermod.cmake
…
vm.c py/emitglue: Introduce mp_proto_fun_t as a more general mp_raw_code_t. 2024-02-16 14:17:01 +11:00
vmentrytable.h
…
vstr.c all: Remove the "STATIC" macro and just use "static" instead. 2024-03-07 14:20:42 +11:00
warning.c
…