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fix: enable Python UTF-8 mode to fix open() encoding default #66

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Merged
danbugs merged 1 commit into from
May 17, 2026
Merged

fix: enable Python UTF-8 mode to fix open() encoding default #66

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9 changes: 2 additions & 7 deletions examples/python-agent-driver/hl_pydriver.c
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Original file line number Diff line number Diff line change
Expand Up @@ -234,17 +234,12 @@ static void py_run_user_code(const uint8_t *fc, size_t fc_len)

static void py_initialize_once(void)
{
Py_UTF8Mode = 1;
Py_Initialize();

/* sys.argv so scripts that look at it don't crash. Also force
* stdout/stderr to UTF-8 — the guest has no locale configured,
* so Python defaults to ASCII and any non-ASCII char (em-dash,
* smart quotes, …) in a script's print() raises UnicodeEncodeError. */
PyRun_SimpleString(
"import sys\n"
"sys.argv = ['hl_pydriver']\n"
"sys.stdout.reconfigure(encoding='utf-8')\n"
"sys.stderr.reconfigure(encoding='utf-8')\n");
"sys.argv = ['hl_pydriver']\n");

/* Pre-import the python-agent stack so every subsequent call
* through the v2 callback sees a warm sys.modules and pays only
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