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gh-81057: Move time Globals to _PyRuntimeState (gh-100122)

Browse source 
https://github.com/python/cpython/issues/81057
This commit is contained in:
Eric Snow 2022-12-08 16:46:09 -07:00 committed by GitHub
parent cda9f0236f
commit 8a3f06c54b
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GPG key ID: 4AEE18F83AFDEB23
14 changed files with 100 additions and 118 deletions
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38
Include/internal/pycore_os.h
View file

@ -1,38 +0,0 @@
#ifndef Py_INTERNAL_OS_H
#define Py_INTERNAL_OS_H
#ifdef __cplusplus
extern "C" {
#endif
#ifndef Py_BUILD_CORE
# error "this header requires Py_BUILD_CORE define"
#endif
#ifndef MS_WINDOWS
#define _OS_NEED_TICKS_PER_SECOND
# define need_ticks_per_second_STATE \
long ticks_per_second;
# define need_ticks_per_second_INIT \
.ticks_per_second = -1,
#else
# define need_ticks_per_second_STATE
# define need_ticks_per_second_INIT
#endif /* MS_WINDOWS */
struct _os_runtime_state {
int _not_used;
need_ticks_per_second_STATE
};
# define _OS_RUNTIME_INIT \
{ \
._not_used = 0, \
need_ticks_per_second_INIT \
}
#ifdef __cplusplus
}
#endif
#endif /* !Py_INTERNAL_OS_H */

1
Include/internal/pycore_pylifecycle.h
View file

@ -44,6 +44,7 @@ extern void _PySys_Fini(PyInterpreterState *interp);
extern int _PyBuiltins_AddExceptions(PyObject * bltinmod);
extern PyStatus _Py_HashRandomization_Init(const PyConfig *);
extern PyStatus _PyTime_Init(void);
extern PyStatus _PyImportZip_Init(PyThreadState *tstate);
extern PyStatus _PyGC_Init(PyInterpreterState *interp);
extern PyStatus _PyAtExit_Init(PyInterpreterState *interp);

4
Include/internal/pycore_runtime.h
View file

@ -21,7 +21,7 @@ extern "C" {
#include "pycore_pymem.h" // struct _pymem_allocators
#include "pycore_pyhash.h" // struct pyhash_runtime_state
#include "pycore_obmalloc.h" // struct obmalloc_state
#include "pycore_os.h" // struct _os_runtime_state
#include "pycore_time.h" // struct _time_runtime_state
#include "pycore_unicodeobject.h" // struct _Py_unicode_runtime_ids
struct _getargs_runtime_state {
@ -104,7 +104,7 @@ typedef struct pyruntimestate {
* KeyboardInterrupt exception, suggesting the user pressed ^C. */
int unhandled_keyboard_interrupt;
} signals;
struct _os_runtime_state os;
struct _time_runtime_state time;
struct pyinterpreters {
PyThread_type_lock mutex;

1
Include/internal/pycore_runtime_init.h
View file

@ -26,7 +26,6 @@ extern "C" {
}, \
.obmalloc = _obmalloc_state_INIT(runtime.obmalloc), \
.pyhash_state = pyhash_state_INIT, \
.os = _OS_RUNTIME_INIT, \
.interpreters = { \
/* This prevents interpreters from getting created \
until _PyInterpreterState_Enable() is called. */ \

25
Include/internal/pycore_time.h Normal file
View file

@ -0,0 +1,25 @@
#ifndef Py_INTERNAL_TIME_H
#define Py_INTERNAL_TIME_H
#ifdef __cplusplus
extern "C" {
#endif
#ifndef Py_BUILD_CORE
# error "this header requires Py_BUILD_CORE define"
#endif
struct _time_runtime_state {
#ifdef HAVE_TIMES
int ticks_per_second_initialized;
long ticks_per_second;
#else
int _not_used;
#endif
};
#ifdef __cplusplus
}
#endif
#endif /* !Py_INTERNAL_TIME_H */

2
Makefile.pre.in
View file

@ -1654,7 +1654,6 @@ PYTHON_HEADERS= \
$(srcdir)/Include/internal/pycore_object.h \
$(srcdir)/Include/internal/pycore_obmalloc.h \
$(srcdir)/Include/internal/pycore_obmalloc_init.h \
$(srcdir)/Include/internal/pycore_os.h \
$(srcdir)/Include/internal/pycore_pathconfig.h \
$(srcdir)/Include/internal/pycore_pyarena.h \
$(srcdir)/Include/internal/pycore_pyerrors.h \
@ -1673,6 +1672,7 @@ PYTHON_HEADERS= \
$(srcdir)/Include/internal/pycore_structseq.h \
$(srcdir)/Include/internal/pycore_symtable.h \
$(srcdir)/Include/internal/pycore_sysmodule.h \
$(srcdir)/Include/internal/pycore_time.h \
$(srcdir)/Include/internal/pycore_token.h \
$(srcdir)/Include/internal/pycore_traceback.h \
$(srcdir)/Include/internal/pycore_tuple.h \

30
Modules/posixmodule.c
View file

@ -9065,24 +9065,6 @@ build_times_result(PyObject *module, double user, double system,
}
#ifdef _OS_NEED_TICKS_PER_SECOND
#define ticks_per_second _PyRuntime.os.ticks_per_second
static void
ticks_per_second_init(void)
{
if (ticks_per_second != -1) {
return;
}
# if defined(HAVE_SYSCONF) && defined(_SC_CLK_TCK)
ticks_per_second = sysconf(_SC_CLK_TCK);
# elif defined(HZ)
ticks_per_second = HZ;
# else
ticks_per_second = 60; /* magic fallback value; may be bogus */
# endif
}
#endif
/*[clinic input]
os.times
@ -9116,22 +9098,24 @@ os_times_impl(PyObject *module)
(double)0,
(double)0);
}
#elif !defined(_OS_NEED_TICKS_PER_SECOND)
# error "missing ticks_per_second"
#else /* MS_WINDOWS */
{
struct tms t;
clock_t c;
errno = 0;
c = times(&t);
if (c == (clock_t) -1)
if (c == (clock_t) -1) {
return posix_error();
}
assert(_PyRuntime.time.ticks_per_second_initialized);
#define ticks_per_second _PyRuntime.time.ticks_per_second
return build_times_result(module,
(double)t.tms_utime / ticks_per_second,
(double)t.tms_stime / ticks_per_second,
(double)t.tms_cutime / ticks_per_second,
(double)t.tms_cstime / ticks_per_second,
(double)c / ticks_per_second);
#undef ticks_per_second
}
#endif /* MS_WINDOWS */
#endif /* HAVE_TIMES */
@ -15950,10 +15934,6 @@ posixmodule_exec(PyObject *m)
PyModule_AddObject(m, "statvfs_result", Py_NewRef(StatVFSResultType));
state->StatVFSResultType = StatVFSResultType;
#ifdef _OS_NEED_TICKS_PER_SECOND
ticks_per_second_init();
#endif
#if defined(HAVE_SCHED_SETPARAM) || defined(HAVE_SCHED_SETSCHEDULER) || defined(POSIX_SPAWN_SETSCHEDULER) || defined(POSIX_SPAWN_SETSCHEDPARAM)
sched_param_desc.name = MODNAME ".sched_param";
PyObject *SchedParamType = (PyObject *)PyStructSequence_NewType(&sched_param_desc);

94
Modules/timemodule.c
View file

@ -62,6 +62,54 @@
#define SEC_TO_NS (1000 * 1000 * 1000)
#ifdef HAVE_TIMES
static int
check_ticks_per_second(long tps, const char *context)
{
/* Effectively, check that _PyTime_MulDiv(t, SEC_TO_NS, ticks_per_second)
cannot overflow. */
if (tps >= 0 && (_PyTime_t)tps > _PyTime_MAX / SEC_TO_NS) {
PyErr_Format(PyExc_OverflowError, "%s is too large", context);
return -1;
}
return 0;
}
# define ticks_per_second _PyRuntime.time.ticks_per_second
static void
ensure_ticks_per_second(void)
{
if (_PyRuntime.time.ticks_per_second_initialized) {
return;
}
_PyRuntime.time.ticks_per_second_initialized = 1;
# if defined(HAVE_SYSCONF) && defined(_SC_CLK_TCK)
ticks_per_second = sysconf(_SC_CLK_TCK);
if (ticks_per_second < 1) {
ticks_per_second = -1;
}
# elif defined(HZ)
ticks_per_second = HZ;
# else
ticks_per_second = 60; /* magic fallback value; may be bogus */
# endif
}
#endif /* HAVE_TIMES */
PyStatus
_PyTime_Init(void)
{
#ifdef HAVE_TIMES
ensure_ticks_per_second();
#endif
return PyStatus_Ok();
}
/* Forward declarations */
static int pysleep(_PyTime_t timeout);
@ -140,18 +188,8 @@ Return the current time in nanoseconds since the Epoch.");
static int
_PyTime_GetClockWithInfo(_PyTime_t *tp, _Py_clock_info_t *info)
{
static int initialized = 0;
if (!initialized) {
initialized = 1;
/* Make sure that _PyTime_MulDiv(ticks, SEC_TO_NS, CLOCKS_PER_SEC)
above cannot overflow */
if ((_PyTime_t)CLOCKS_PER_SEC > _PyTime_MAX / SEC_TO_NS) {
PyErr_SetString(PyExc_OverflowError,
"CLOCKS_PER_SEC is too large");
return -1;
}
if (check_ticks_per_second(CLOCKS_PER_SEC, "CLOCKS_PER_SEC") < 0) {
return -1;
}
if (info) {
@ -1308,36 +1346,10 @@ _PyTime_GetProcessTimeWithInfo(_PyTime_t *tp, _Py_clock_info_t *info)
struct tms t;
if (times(&t) != (clock_t)-1) {
static long ticks_per_second = -1;
if (ticks_per_second == -1) {
long freq;
#if defined(HAVE_SYSCONF) && defined(_SC_CLK_TCK)
freq = sysconf(_SC_CLK_TCK);
if (freq < 1) {
freq = -1;
}
#elif defined(HZ)
freq = HZ;
#else
freq = 60; /* magic fallback value; may be bogus */
#endif
if (freq != -1) {
/* check that _PyTime_MulDiv(t, SEC_TO_NS, ticks_per_second)
cannot overflow below */
#if LONG_MAX > _PyTime_MAX / SEC_TO_NS
if ((_PyTime_t)freq > _PyTime_MAX / SEC_TO_NS) {
PyErr_SetString(PyExc_OverflowError,
"_SC_CLK_TCK is too large");
return -1;
}
#endif
ticks_per_second = freq;
}
assert(_PyRuntime.time.ticks_per_second_initialized);
if (check_ticks_per_second(ticks_per_second, "_SC_CLK_TCK") < 0) {
return -1;
}
if (ticks_per_second != -1) {
if (info) {
info->implementation = "times()";

1
PCbuild/_freeze_module.vcxproj
View file

@ -110,6 +110,7 @@
<ClCompile Include="..\Modules\getpath_noop.c" />
<ClCompile Include="..\Modules\posixmodule.c" />
<ClCompile Include="..\Modules\signalmodule.c" />
<ClCompile Include="..\Modules\timemodule.c" />
<ClCompile Include="..\Modules\_tracemalloc.c" />
<ClCompile Include="..\Modules\_io\_iomodule.c" />
<ClCompile Include="..\Modules\_io\bufferedio.c" />

3
PCbuild/_freeze_module.vcxproj.filters
View file

@ -367,6 +367,9 @@
<ClCompile Include="..\Python\thread.c">
<Filter>Source Files</Filter>
</ClCompile>
<ClCompile Include="..\Modules\timemodule.c">
<Filter>Source Files</Filter>
</ClCompile>
<ClCompile Include="..\Parser\token.c">
<Filter>Source Files</Filter>
</ClCompile>

2
PCbuild/pythoncore.vcxproj
View file

@ -236,7 +236,6 @@
<ClInclude Include="..\Include\internal\pycore_object.h" />
<ClInclude Include="..\Include\internal\pycore_obmalloc.h" />
<ClInclude Include="..\Include\internal\pycore_obmalloc_init.h" />
<ClInclude Include="..\Include\internal\pycore_os.h" />
<ClInclude Include="..\Include\internal\pycore_pathconfig.h" />
<ClInclude Include="..\Include\internal\pycore_pyarena.h" />
<ClInclude Include="..\Include\internal\pycore_pyerrors.h" />
@ -255,6 +254,7 @@
<ClInclude Include="..\Include\internal\pycore_structseq.h" />
<ClInclude Include="..\Include\internal\pycore_sysmodule.h" />
<ClInclude Include="..\Include\internal\pycore_symtable.h" />
<ClInclude Include="..\Include\internal\pycore_time.h" />
<ClInclude Include="..\Include\internal\pycore_token.h" />
<ClInclude Include="..\Include\internal\pycore_traceback.h" />
<ClInclude Include="..\Include\internal\pycore_tuple.h" />

6
PCbuild/pythoncore.vcxproj.filters
View file

@ -612,9 +612,6 @@
<ClInclude Include="..\Include\internal\pycore_obmalloc_init.h">
<Filter>Include\internal</Filter>
</ClInclude>
<ClInclude Include="..\Include\internal\pycore_os.h">
<Filter>Include\internal</Filter>
</ClInclude>
<ClInclude Include="..\Include\internal\pycore_pathconfig.h">
<Filter>Include\internal</Filter>
</ClInclude>
@ -666,6 +663,9 @@
<ClInclude Include="..\Include\internal\pycore_symtable.h">
<Filter>Include\internal</Filter>
</ClInclude>
<ClInclude Include="..\Include\internal\pycore_time.h">
<Filter>Include\internal</Filter>
</ClInclude>
<ClInclude Include="..\Include\internal\pycore_token.h">
<Filter>Include\internal</Filter>
</ClInclude>

5
Python/pylifecycle.c
View file

@ -606,6 +606,11 @@ pycore_init_runtime(_PyRuntimeState *runtime,
return status;
}
status = _PyTime_Init();
if (_PyStatus_EXCEPTION(status)) {
return status;
}
status = _PyImport_Init();
if (_PyStatus_EXCEPTION(status)) {
return status;

6
Tools/c-analyzer/cpython/globals-to-fix.tsv
View file

@ -387,12 +387,6 @@ Modules/faulthandler.c - old_stack -
##################################
## global non-objects to fix in builtin modules
##-----------------------
## initialized once
Modules/timemodule.c _PyTime_GetClockWithInfo initialized -
Modules/timemodule.c _PyTime_GetProcessTimeWithInfo ticks_per_second -
##-----------------------
## state

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