UpsilonNumworks/Upsilon
1
0
Fork 0
mirror of https://github.com/UpsilonNumworks/Upsilon.git synced 2026-01-19 00:37:25 +01:00
Code Issues Packages Projects Releases Wiki Activity

[python] Fix stack boundary on the device

Browse Source
This commit is contained in:
Émilie Feral
2019-12-02 12:19:31 +01:00
committed by Léa Saviot
parent d1e93a2918
commit 4b58efbc0a
1 changed files with 11 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
python/port/port.cpp
View File

@@ -99,13 +99,20 @@ extern "C" {
}
void MicroPython::init(void * heapStart, void * heapEnd) {
volatile int stackTop;
void * stackTopAddress = (void *)(&stackTop);
/* We delimit the stack part that will be used by Python. The stackTop is the
* address of the first object that can be allocated on Python stack. This
* boundaries are used:
* - by gc_collect to determine where to collect roots of the objects that
* must be kept on the heap
* - to check if the maximal recursion depth has been reached. */
#if MP_PORT_USE_STACK_SYMBOLS
mp_stack_set_top(&_stack_start);
size_t stackLimitInBytes = (char *)&_stack_start - (char *)&_stack_end;
mp_stack_set_top(stackTopAddress);
size_t stackLimitInBytes = (char *)stackTopAddress - (char *)&_stack_end;
mp_stack_set_limit(stackLimitInBytes);
#else
volatile int stackTop;
mp_stack_set_top((void *)(&stackTop));
mp_stack_set_top(stackTopAddress);
/* The stack limit is set to roughly mimic the maximal recursion depth of the
* device - and actually to be slightly less to be sure not to beat the device
* performance. */