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py: Integrate sys.settrace feature into the VM and runtime.

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This commit adds support for sys.settrace, allowing to install Python
handlers to trace execution of Python code.  The interface follows CPython
as closely as possible.  The feature is disabled by default and can be
enabled via MICROPY_PY_SYS_SETTRACE.
This commit is contained in:
Milan Rossa
2019-08-14 16:09:36 +02:00
committed by Damien George
parent c96aedad46
commit 310b3d1b81
15 changed files with 201 additions and 1 deletions
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18
py/bc.h
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@@ -60,6 +60,20 @@
// const0 : obj
// constN : obj
typedef struct _mp_bytecode_prelude_t {
uint n_state;
uint n_exc_stack;
uint scope_flags;
uint n_pos_args;
uint n_kwonly_args;
uint n_def_pos_args;
qstr qstr_block_name;
qstr qstr_source_file;
const byte *line_info;
const byte *locals;
const byte *opcodes;
} mp_bytecode_prelude_t;
// Exception stack entry
typedef struct _mp_exc_stack_t {
const byte *handler;
@@ -84,6 +98,10 @@ typedef struct _mp_code_state_t {
#if MICROPY_STACKLESS
struct _mp_code_state_t *prev;
#endif
#if MICROPY_PY_SYS_SETTRACE
struct _mp_code_state_t *prev_state;
struct _mp_obj_frame_t *frame;
#endif
// Variable-length
mp_obj_t state[0];
// Variable-length, never accessed by name, only as (void*)(state + n_state)