[Python-checkins] cpython (3.5): Fix _tracemalloc start/stop
victor.stinner
python-checkins at python.org
Tue Mar 22 19:20:13 EDT 2016
https://hg.python.org/cpython/rev/af1c1149784a
changeset: 100665:af1c1149784a
branch: 3.5
parent: 100648:af6e8e1d15fa
user: Victor Stinner <victor.stinner at gmail.com>
date: Wed Mar 23 00:10:24 2016 +0100
summary:
Fix _tracemalloc start/stop
Issue #26588: Fix _tracemalloc start/stop: don't play with the reentrant flag.
set_reentrant(1) fails with an assertion error if tracemalloc_init() is called
first in a thread A and tracemalloc_start() is called second in a thread B. The
tracemalloc is imported in a thread A. Importing the module calls
tracemalloc_init(). tracemalloc.start() is called in a thread B.
files:
Modules/_tracemalloc.c | 14 --------------
1 files changed, 0 insertions(+), 14 deletions(-)
diff --git a/Modules/_tracemalloc.c b/Modules/_tracemalloc.c
--- a/Modules/_tracemalloc.c
+++ b/Modules/_tracemalloc.c
@@ -740,10 +740,6 @@
assert(PyGILState_Check());
#endif
- /* Disable also reentrant calls to tracemalloc_malloc() to not add a new
- trace while we are clearing traces */
- assert(get_reentrant());
-
TABLES_LOCK();
_Py_hashtable_clear(tracemalloc_traces);
tracemalloc_traced_memory = 0;
@@ -823,11 +819,6 @@
tracemalloc_empty_traceback.frames[0].lineno = 0;
tracemalloc_empty_traceback.hash = traceback_hash(&tracemalloc_empty_traceback);
- /* Disable tracing allocations until hooks are installed. Set
- also the reentrant flag to detect bugs: fail with an assertion error
- if set_reentrant(1) is called while tracing is disabled. */
- set_reentrant(1);
-
tracemalloc_config.initialized = TRACEMALLOC_INITIALIZED;
return 0;
}
@@ -912,7 +903,6 @@
/* everything is ready: start tracing Python memory allocations */
tracemalloc_config.tracing = 1;
- set_reentrant(0);
return 0;
}
@@ -926,10 +916,6 @@
/* stop tracing Python memory allocations */
tracemalloc_config.tracing = 0;
- /* set the reentrant flag to detect bugs: fail with an assertion error if
- set_reentrant(1) is called while tracing is disabled. */
- set_reentrant(1);
-
/* unregister the hook on memory allocators */
#ifdef TRACE_RAW_MALLOC
PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &allocators.raw);
--
Repository URL: https://hg.python.org/cpython
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