René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"\"import hashlib\" crashes on aarch64 after Finalize and re-initialize","articleBody":"# Crash report\n\n### What happened?\n\nCompiling and linking below program results in a crash when run on aarch64 (macOS, Debian VM or Ubuntu 22 VM in Azure for example):\n```c\n#include \u003cPython.h\u003e\n\nint main(int argc, char *argv[])\n{\nPy_Initialize();\nPyRun_SimpleString(\"import hashlib\\nprint('test1')\");\nPy_Finalize();\nPy_Initialize();\nPyRun_SimpleString(\"import trace\\ntrace.Trace().run('import hashlib')\\nprint('test2')\");\nPy_Finalize();\nreturn 0;\n}\n```\nThe trace in the second import is just for better context.\nIt seems not reproducible on Intel.\nOn a debug python build it asserts with:\ntestcase1: ../Python/getargs.c:2052: parser_init: Assertion `parser-\u003ekwtuple != NULL' failed.\n\nThe backtrace looks like this:\n#7  0x0000fffff7906fec [PAC] in _PyArg_UnpackKeywords (\n    args=args@entry=0xfffff7fec5d8, nargs=nargs@entry=0, \n    kwargs=kwargs@entry=0x0, kwnames=kwnames@entry=0xfffff6620be0, \n    parser=parser@entry=0xfffff6f70790 \u003c_parser.16\u003e, minpos=minpos@entry=0, \n    maxpos=maxpos@entry=1, minkw=minkw@entry=0, buf=buf@entry=0xffffffffe180)\n    at ../Python/getargs.c:2371\n#8  0x0000fffff6f57500 [PAC] in _hashlib_openssl_md5 (module=0xfffff6553d70, \n    args=args@entry=0xfffff7fec5d8, nargs=nargs@entry=0, \n    kwnames=kwnames@entry=0xfffff6620be0)\n    at ../Modules/clinic/_hashopenssl.c.h:343\n#9  0x0000fffff780c010 [PAC] in cfunction_vectorcall_FASTCALL_KEYWORDS (\n    func=0xfffff656c050, args=0xfffff7fec5d8, nargsf=\u003coptimized out\u003e, \n    kwnames=0xfffff6620be0) at ../Objects/methodobject.c:438\n#10 0x0000fffff77b6c18 [PAC] in _PyObject_VectorcallTstate (\n    tstate=0xfffff7f6e1f0 \u003c_PyRuntime+475736\u003e, \n    callable=callable@entry=0xfffff656c050, args=args@entry=0xfffff7fec5d8, \n    nargsf=nargsf@entry=9223372036854775808, \n    kwnames=kwnames@entry=0xfffff6620be0)\n    at ../Include/internal/pycore_call.h:92\n\n\nLooking at the hashlib_openssl_md5 function, the use of static non-const structures seems very suspicious at least.\n\n### CPython versions tested on:\n\n3.12\n\n### Operating systems tested on:\n\nLinux, macOS\n\n### Output from running 'python -VV' on the command line:\n\nPython 3.12.4 (main, Jun  8 2024, 04:51:36) [Clang 15.0.0 (clang-1500.1.0.2.5)]","author":{"url":"https://github.com/rdoeffinger","@type":"Person","name":"rdoeffinger"},"datePublished":"2024-06-27T11:12:56.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":9},"url":"https://github.com/121087/cpython/issues/121087"}