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pikasTech / PikaPython

An ultra-lightweight Python interpreter that runs with only 4KB of RAM, zero dependencies. It is ready to use out of the box without any configuration required and easy to extend with C. Similar project: MicroPython, JerryScript.
http://pikapython.com/
MIT License
1.45k stars 132 forks source link

multiplication parsing bug #326

Closed zwarrior1 closed 10 months ago

zwarrior1 commented 10 months ago

Hi I was bench marking QUICKJS vs PIKAPYTHON (both are ported to CODEBLOCKS) I encountered a weird case where following code causes segmentation fault in compiling stage:

a = 3.0
b = 1e-05 * a

but these ones do not cause errors

a = 3.0
b = 1e05 * a
a = 3.0
b = (1e-05) * a

I'm not sure it is my fault (I misconfigured something) or Pika's internal bug. please someone help me.

here is call stack dump if you need it:

#0 0x7ffff7d39e6e   _int_malloc(av=av@entry=0x7ffff7eafc80 <main_arena>, bytes=bytes@entry=24) (./malloc/malloc.c:3903)
#1 0x7ffff7d3b2e2   __GI___libc_malloc(bytes=24) (./malloc/malloc.c:3321)
#2 0x5555555b130e   pika_platform_malloc(size=24) (PikaPython/src/PikaPlatform.c:207)
#3 0x5555555b139d   pika_user_malloc(size=24) (PikaPython/src/PikaPlatform.c:223)
#4 0x5555555957b1   pikaMalloc(size=24) (PikaPython/src/dataMemory.c:51)
#5 0x5555555a14b0   New_PikaObj() (PikaPython/src/PikaObj.c:2477)
#6 0x5555555bcd09   New_TinyObj(args=0x0) (PikaPython/src/TinyObj.c:36)
#7 0x55555559d215   obj_newObjFromConstructor(context=0x555556208810, name=0x5555555c14c0 "", constructor=0x5555555bccf4 <New_TinyObj>) (PikaPython/src/PikaObj.c:463)
#8 0x55555559dac2   obj_getClassObj(obj=0x555556208810) (PikaPython/src/PikaObj.c:649)
#9 0x55555559d75a   obj_getProp(self=0x555556208810) (PikaPython/src/PikaObj.c:541)
#10 0x55555559d7b1  _obj_getPropArg(obj=0x555556208810, name=0x5555555c19d4 "__init__") (PikaPython/src/PikaObj.c:552)
#11 0x55555559d956  _obj_getMethodArg(obj=0x555556208810, methodName=0x5555555c19d4 "__init__", arg_reg=0x0) (PikaPython/src/PikaObj.c:610)
#12 0x55555559d9a4  _obj_getMethodArgWithFullPath(obj=0x555556208810, methodPath=0x5555555c19d4 "__init__", arg_reg=0x0) (PikaPython/src/PikaObj.c:619)
#13 0x55555559d9d2  obj_getMethodArgWithFullPath(obj=0x555556208810, methodPath=0x5555555c19d4 "__init__") (PikaPython/src/PikaObj.c:623)
#14 0x55555559eb09  obj_getNativeMethod(self=0x555556208810, method_name=0x5555555c19d4 "__init__") (PikaPython/src/PikaObj.c:1068)
#15 0x55555559f348  obj_runNativeMethod(self=0x555556208810, method_name=0x5555555c19d4 "__init__", args=0x0) (PikaPython/src/PikaObj.c:1293)
#16 0x55555559e0b9  _obj_initMetaObj(obj=0x555556208770, name=0x7fffff7ff450 "3294967297") (PikaPython/src/PikaObj.c:804)
#17 0x55555559e2d4  _obj_getObjDirect(self=0x555556208770, name=0x7fffff7ff450 "3294967297", pIsTemp=0x7fffff7ff4e0) (PikaPython/src/PikaObj.c:863)
#18 0x55555559e494  _obj_getObjWithKeepDeepth(self=0x555556208770, objPath=0x7fffff7ff52d "3294967297", pIsTemp=0x7fffff7ff4e0, keepDeepth=0) (PikaPython/src/PikaObj.c:904)
#19 0x55555559e51b  obj_getObj(self=0x555556208770, objPath=0x7fffff7ff52d "3294967297") (PikaPython/src/PikaObj.c:920)
#20 0x555555596132  queueObj_getCurrentObj(self=0x555556208770) (PikaPython/src/dataQueueObj.c:55)
#21 0x5555555a97c6  AST_parseSubStmt(ast=0x555556208770, sNodeContent=0x5555562086c8 "") (PikaPython/src/PikaParser.c:1490)
#22 0x5555555aaaea  AST_parseStmt(ast=0x555556208770, sStmt=0x555556208178 "1e-05*a") (PikaPython/src/PikaParser.c:1831)
#23 0x5555555a97d8  AST_parseSubStmt(ast=0x555556208510, sNodeContent=0x555556208178 "1e-05*a") (PikaPython/src/PikaParser.c:1490)
#24 0x5555555aab03  AST_parseStmt(ast=0x555556208510, sStmt=0x555556207f18 "1e-05*a") (PikaPython/src/PikaParser.c:1832)
#25 0x5555555a97d8  AST_parseSubStmt(ast=0x5555562082b0, sNodeContent=0x555556207f18 "1e-05*a") (PikaPython/src/PikaParser.c:1490)
#26 0x5555555aab03  AST_parseStmt(ast=0x5555562082b0, sStmt=0x555556207cb8 "1e-05*a") (PikaPython/src/PikaParser.c:1832)
#27 0x5555555a97d8  AST_parseSubStmt(ast=0x555556208050, sNodeContent=0x555556207cb8 "1e-05*a") (PikaPython/src/PikaParser.c:1490)
#28 0x5555555aab03  AST_parseStmt(ast=0x555556208050, sStmt=0x555556207a58 "1e-05*a") (PikaPython/src/PikaParser.c:1832)
#29 0x5555555a97d8  AST_parseSubStmt(ast=0x555556207df0, sNodeContent=0x555556207a58 "1e-05*a") (PikaPython/src/PikaParser.c:1490)
pikasTech commented 10 months ago

This might be a syntax parsing error, I will check it.

pikasTech commented 10 months ago

image fixed https://github.com/pikasTech/PikaPython/commit/16242270c5aecb39be50d50aee472c336a27bc71