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bpo-34228: Allow PYTHONTRACEMALLOC=0 (GH-8467)

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PYTHONTRACEMALLOC=0 environment variable and -X tracemalloc=0 command
line option are now allowed to disable explicitly tracemalloc at
startup.
This commit is contained in:
Victor Stinner 2018-07-25 19:23:53 +02:00 committed by GitHub
parent 96d1e69a12
commit 60b04c9f6f
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
4 changed files with 30 additions and 9 deletions
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1
Include/pystate.h
View file

@ -232,6 +232,7 @@ typedef struct {
.install_signal_handlers = -1, \
.ignore_environment = -1, \
.use_hash_seed = -1, \
.tracemalloc = -1, \
.coerce_c_locale = -1, \
.utf8_mode = -1, \
.argc = -1, \

12
Lib/test/test_tracemalloc.py
View file

@ -15,6 +15,7 @@
EMPTY_STRING_SIZE = sys.getsizeof(b'')
INVALID_NFRAME = (-1, 2**30)
def get_frames(nframe, lineno_delta):
@ -833,6 +834,13 @@ def test_env_var_ignored_with_E(self):
stdout = stdout.rstrip()
self.assertEqual(stdout, b'False')
def test_env_var_disabled(self):
# tracing at startup
code = 'import tracemalloc; print(tracemalloc.is_tracing())'
ok, stdout, stderr = assert_python_ok('-c', code, PYTHONTRACEMALLOC='0')
stdout = stdout.rstrip()
self.assertEqual(stdout, b'False')
def test_env_var_enabled_at_startup(self):
# tracing at startup
code = 'import tracemalloc; print(tracemalloc.is_tracing())'
@ -861,7 +869,7 @@ def check_env_var_invalid(self, nframe):
def test_env_var_invalid(self):
for nframe in (-1, 0, 2**30):
for nframe in INVALID_NFRAME:
with self.subTest(nframe=nframe):
self.check_env_var_invalid(nframe)
@ -889,7 +897,7 @@ def check_sys_xoptions_invalid(self, nframe):
self.fail(f"unexpeced output: {stderr!a}")
def test_sys_xoptions_invalid(self):
for nframe in (-1, 0, 2**30):
for nframe in INVALID_NFRAME:
with self.subTest(nframe=nframe):
self.check_sys_xoptions_invalid(nframe)

3
Misc/NEWS.d/next/Library/2018-07-25-19-02-39.bpo-34228.0Ibztw.rst Normal file
View file

@ -0,0 +1,3 @@
tracemalloc: PYTHONTRACEMALLOC=0 environment variable and -X tracemalloc=0
command line option are now allowed to disable explicitly tracemalloc at
startup.

23
Modules/main.c
View file

@ -1726,10 +1726,14 @@ pymain_init_tracemalloc(_PyCoreConfig *config)
int nframe;
int valid;
if (config->tracemalloc >= 0) {
return _Py_INIT_OK();
}
const char *env = config_get_env_var(config, "PYTHONTRACEMALLOC");
if (env) {
if (!pymain_str_to_int(env, &nframe)) {
valid = (nframe >= 1);
valid = (nframe >= 0);
}
else {
valid = 0;
@ -1746,7 +1750,7 @@ pymain_init_tracemalloc(_PyCoreConfig *config)
const wchar_t *sep = wcschr(xoption, L'=');
if (sep) {
if (!pymain_wstr_to_int(sep + 1, &nframe)) {
valid = (nframe >= 1);
valid = (nframe >= 0);
}
else {
valid = 0;
@ -2249,17 +2253,22 @@ _PyCoreConfig_Read(_PyCoreConfig *config)
config_init_locale(config);
/* Signal handlers are installed by default */
if (config->install_signal_handlers < 0) {
config->install_signal_handlers = 1;
}
if (config->_install_importlib) {
err = _PyCoreConfig_InitPathConfig(config);
if (_Py_INIT_FAILED(err)) {
return err;
}
}
/* default values */
if (config->tracemalloc < 0) {
config->tracemalloc = 0;
}
if (config->install_signal_handlers < 0) {
/* Signal handlers are installed by default */
config->install_signal_handlers = 1;
}
return _Py_INIT_OK();
}