DTrace support: function calls, GC activity, line execution

Tested on macOS 10.11 dtrace, Ubuntu 16.04 SystemTap, and libbcc.

Largely based by an initial patch by Jesús Cea Avión, with some
influence from Dave Malcolm's SystemTap patch and Nikhil Benesch's
unification patch.

Things deliberately left out for simplicity:
- ustack helpers, I have no way of testing them at this point since
they are Solaris-specific
- PyFrameObject * in function__entry/function__return, this is
SystemTap-specific
- SPARC support
- dynamic tracing
- sys module dtrace facility introspection

All of those might be added later.
This commit is contained in:
Łukasz Langa 2016-09-09 17:37:37 -07:00
parent 39b42ae8db
commit a785c87d6e
31 changed files with 1305 additions and 18 deletions

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@ -56,6 +56,7 @@ libpython*.dylib
*.profclang?
*.profraw
*.dyn
Include/pydtrace_probes.h
Lib/distutils/command/*.pdb
Lib/lib2to3/*.pickle
Lib/test/data/*

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@ -28,4 +28,5 @@ Currently, the HOWTOs are:
argparse.rst
ipaddress.rst
clinic.rst
instrumentation.rst

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@ -0,0 +1,411 @@
.. _instrumentation:
===============================================
Instrumenting CPython with DTrace and SystemTap
===============================================
:author: David Malcolm
:author: Łukasz Langa
DTrace and SystemTap are monitoring tools, each providing a way to inspect
what the processes on a computer system are doing. They both use
domain-specific languages allowing a user to write scripts which:
- filter which processes are to be observed
- gather data from the processes of interest
- generate reports on the data
As of Python 3.6, CPython can be built with embedded "markers", also
known as "probes", that can be observed by a DTrace or SystemTap script,
making it easier to monitor what the CPython processes on a system are
doing.
.. I'm using ".. code-block:: c" for SystemTap scripts, as "c" is syntactically
the closest match that Sphinx supports
.. impl-detail::
DTrace markers are implementation details of the CPython interpreter.
No guarantees are made about probe compatibility between versions of
CPython. DTrace scripts can stop working or work incorrectly without
warning when changing CPython versions.
Enabling the static markers
---------------------------
macOS comes with built-in support for DTrace. On Linux, in order to
build CPython with the embedded markers for SystemTap, the SystemTap
development tools must be installed.
On a Linux machine, this can be done via::
yum install systemtap-sdt-devel
or::
sudo apt-get install systemtap-sdt-dev
CPython must then be configured `--with-dtrace`::
checking for --with-dtrace... yes
On macOS, you can list available DTrace probes by running a Python
process in the background and listing all probes made available by the
Python provider::
$ python3.6 -q &
$ sudo dtrace -l -P python$! # or: dtrace -l -m python3.6
ID PROVIDER MODULE FUNCTION NAME
29564 python18035 python3.6 _PyEval_EvalFrameDefault function-entry
29565 python18035 python3.6 dtrace_function_entry function-entry
29566 python18035 python3.6 _PyEval_EvalFrameDefault function-return
29567 python18035 python3.6 dtrace_function_return function-return
29568 python18035 python3.6 collect gc-done
29569 python18035 python3.6 collect gc-start
29570 python18035 python3.6 _PyEval_EvalFrameDefault line
29571 python18035 python3.6 maybe_dtrace_line line
On Linux, you can verify if the SystemTap static markers are present in
the built binary by seeing if it contains a ".note.stapsdt" section.
.. code-block:: bash
$ readelf -S ./python | grep .note.stapsdt
[30] .note.stapsdt NOTE 0000000000000000 00308d78
If you've built Python as a shared library (with --enable-shared), you
need to look instead within the shared library. For example:
.. code-block:: bash
$ readelf -S libpython3.3dm.so.1.0 | grep .note.stapsdt
[29] .note.stapsdt NOTE 0000000000000000 00365b68
Sufficiently modern readelf can print the metadata:
.. code-block:: bash
$ readelf -n ./python
Displaying notes found at file offset 0x00000254 with length 0x00000020:
Owner Data size Description
GNU 0x00000010 NT_GNU_ABI_TAG (ABI version tag)
OS: Linux, ABI: 2.6.32
Displaying notes found at file offset 0x00000274 with length 0x00000024:
Owner Data size Description
GNU 0x00000014 NT_GNU_BUILD_ID (unique build ID bitstring)
Build ID: df924a2b08a7e89f6e11251d4602022977af2670
Displaying notes found at file offset 0x002d6c30 with length 0x00000144:
Owner Data size Description
stapsdt 0x00000031 NT_STAPSDT (SystemTap probe descriptors)
Provider: python
Name: gc__start
Location: 0x00000000004371c3, Base: 0x0000000000630ce2, Semaphore: 0x00000000008d6bf6
Arguments: -4@%ebx
stapsdt 0x00000030 NT_STAPSDT (SystemTap probe descriptors)
Provider: python
Name: gc__done
Location: 0x00000000004374e1, Base: 0x0000000000630ce2, Semaphore: 0x00000000008d6bf8
Arguments: -8@%rax
stapsdt 0x00000045 NT_STAPSDT (SystemTap probe descriptors)
Provider: python
Name: function__entry
Location: 0x000000000053db6c, Base: 0x0000000000630ce2, Semaphore: 0x00000000008d6be8
Arguments: 8@%rbp 8@%r12 -4@%eax
stapsdt 0x00000046 NT_STAPSDT (SystemTap probe descriptors)
Provider: python
Name: function__return
Location: 0x000000000053dba8, Base: 0x0000000000630ce2, Semaphore: 0x00000000008d6bea
Arguments: 8@%rbp 8@%r12 -4@%eax
The above metadata contains information for SystemTap describing how it
can patch strategically-placed machine code instructions to enable the
tracing hooks used by a SystemTap script.
Static DTrace probes
--------------------
The following example DTrace script can be used to show the call/return
hierarchy of a Python script, only tracing within the invocation of
a function called "start". In other words, import-time function
invocations are not going to be listed:
.. code-block:: c
self int indent;
python$target:::function-entry
/copyinstr(arg1) == "start"/
{
self->trace = 1;
}
python$target:::function-entry
/self->trace/
{
printf("%d\t%*s:", timestamp, 15, probename);
printf("%*s", self->indent, "");
printf("%s:%s:%d\n", basename(copyinstr(arg0)), copyinstr(arg1), arg2);
self->indent++;
}
python$target:::function-return
/self->trace/
{
self->indent--;
printf("%d\t%*s:", timestamp, 15, probename);
printf("%*s", self->indent, "");
printf("%s:%s:%d\n", basename(copyinstr(arg0)), copyinstr(arg1), arg2);
}
python$target:::function-return
/copyinstr(arg1) == "start"/
{
self->trace = 0;
}
It can be invoked like this:
.. code-block:: bash
$ sudo dtrace -q -s call_stack.d -c "python3.6 script.py"
The output looks like this::
156641360502280 function-entry:call_stack.py:start:23
156641360518804 function-entry: call_stack.py:function_1:1
156641360532797 function-entry: call_stack.py:function_3:9
156641360546807 function-return: call_stack.py:function_3:10
156641360563367 function-return: call_stack.py:function_1:2
156641360578365 function-entry: call_stack.py:function_2:5
156641360591757 function-entry: call_stack.py:function_1:1
156641360605556 function-entry: call_stack.py:function_3:9
156641360617482 function-return: call_stack.py:function_3:10
156641360629814 function-return: call_stack.py:function_1:2
156641360642285 function-return: call_stack.py:function_2:6
156641360656770 function-entry: call_stack.py:function_3:9
156641360669707 function-return: call_stack.py:function_3:10
156641360687853 function-entry: call_stack.py:function_4:13
156641360700719 function-return: call_stack.py:function_4:14
156641360719640 function-entry: call_stack.py:function_5:18
156641360732567 function-return: call_stack.py:function_5:21
156641360747370 function-return:call_stack.py:start:28
Static SystemTap markers
------------------------
The low-level way to use the SystemTap integration is to use the static
markers directly. This requires you to explicitly state the binary file
containing them.
For example, this SystemTap script can be used to show the call/return
hierarchy of a Python script:
.. code-block:: c
probe process('python').mark("function__entry") {
filename = user_string($arg1);
funcname = user_string($arg2);
lineno = $arg3;
printf("%s => %s in %s:%d\\n",
thread_indent(1), funcname, filename, lineno);
}
probe process('python').mark("function__return") {
filename = user_string($arg1);
funcname = user_string($arg2);
lineno = $arg3;
printf("%s <= %s in %s:%d\\n",
thread_indent(-1), funcname, filename, lineno);
}
It can be invoked like this:
.. code-block:: bash
$ stap \
show-call-hierarchy.stp \
-c ./python test.py
The output looks like this::
11408 python(8274): => __contains__ in Lib/_abcoll.py:362
11414 python(8274): => __getitem__ in Lib/os.py:425
11418 python(8274): => encode in Lib/os.py:490
11424 python(8274): <= encode in Lib/os.py:493
11428 python(8274): <= __getitem__ in Lib/os.py:426
11433 python(8274): <= __contains__ in Lib/_abcoll.py:366
where the columns are:
- time in microseconds since start of script
- name of executable
- PID of process
and the remainder indicates the call/return hierarchy as the script executes.
For a `--enable-shared` build of CPython, the markers are contained within the
libpython shared library, and the probe's dotted path needs to reflect this. For
example, this line from the above example::
probe process('python').mark("function__entry") {
should instead read::
probe process('python').library("libpython3.6dm.so.1.0").mark("function__entry") {
(assuming a debug build of CPython 3.6)
Available static markers
------------------------
.. I'm reusing the "c:function" type for markers
.. c:function:: function__entry(str filename, str funcname, int lineno)
This marker indicates that execution of a Python function has begun.
It is only triggered for pure-Python (bytecode) functions.
The filename, function name, and line number are provided back to the
tracing script as positional arguments, which must be accessed using
`$arg1`, `$arg2`, `$arg3`:
* `$arg1` : `(const char *)` filename, accessible using `user_string($arg1)`
* `$arg2` : `(const char *)` function name, accessible using
`user_string($arg2)`
* `$arg3` : `int` line number
.. c:function:: function__return(str filename, str funcname, int lineno)
This marker is the converse of `function__entry`, and indicates that
execution of a Python function has ended (either via ``return``, or
via an exception). It is only triggered for pure-Python (bytecode)
functions.
The arguments are the same as for `function__entry`
.. c:function:: line(str filename, str funcname, int lineno)
This marker indicates a Python line is about to be executed. It is
the equivalent of line-by-line tracing with a Python profiler. It is
not triggered within C functions.
The arguments are the same as for `function__entry`.
.. c:function:: gc__start(int generation)
Fires when the Python interpreter starts a garbage collection cycle.
`arg0` is the generation to scan, like :func:`gc.collect()`.
.. c:function:: gc__done(long collected)
Fires when the Python interpreter finishes a garbage collection
cycle. `arg0` is the number of collected objects.
SystemTap Tapsets
-----------------
The higher-level way to use the SystemTap integration is to use a "tapset":
SystemTap's equivalent of a library, which hides some of the lower-level
details of the static markers.
Here is a tapset file, based on a non-shared build of CPython:
.. code-block:: c
/*
Provide a higher-level wrapping around the function__entry and
function__return markers:
\*/
probe python.function.entry = process("python").mark("function__entry")
{
filename = user_string($arg1);
funcname = user_string($arg2);
lineno = $arg3;
frameptr = $arg4
}
probe python.function.return = process("python").mark("function__return")
{
filename = user_string($arg1);
funcname = user_string($arg2);
lineno = $arg3;
frameptr = $arg4
}
If this file is installed in SystemTap's tapset directory (e.g.
`/usr/share/systemtap/tapset`), then these additional probepoints become
available:
.. c:function:: python.function.entry(str filename, str funcname, int lineno, frameptr)
This probe point indicates that execution of a Python function has begun.
It is only triggered for pure-python (bytecode) functions.
.. c:function:: python.function.return(str filename, str funcname, int lineno, frameptr)
This probe point is the converse of `python.function.return`, and indicates
that execution of a Python function has ended (either via ``return``, or
via an exception). It is only triggered for pure-python (bytecode) functions.
Examples
--------
This SystemTap script uses the tapset above to more cleanly implement the
example given above of tracing the Python function-call hierarchy, without
needing to directly name the static markers:
.. code-block:: c
probe python.function.entry
{
printf("%s => %s in %s:%d\n",
thread_indent(1), funcname, filename, lineno);
}
probe python.function.return
{
printf("%s <= %s in %s:%d\n",
thread_indent(-1), funcname, filename, lineno);
}
The following script uses the tapset above to provide a top-like view of all
running CPython code, showing the top 20 most frequently-entered bytecode
frames, each second, across the whole system:
.. code-block:: c
global fn_calls;
probe python.function.entry
{
fn_calls[pid(), filename, funcname, lineno] += 1;
}
probe timer.ms(1000) {
printf("\033[2J\033[1;1H") /* clear screen \*/
printf("%6s %80s %6s %30s %6s\n",
"PID", "FILENAME", "LINE", "FUNCTION", "CALLS")
foreach ([pid, filename, funcname, lineno] in fn_calls- limit 20) {
printf("%6d %80s %6d %30s %6d\n",
pid, filename, lineno, funcname,
fn_calls[pid, filename, funcname, lineno]);
}
delete fn_calls;
}

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@ -407,6 +407,31 @@ Example of fatal error on buffer overflow using
(Contributed by Victor Stinner in :issue:`26516` and :issue:`26564`.)
DTrace and SystemTap probing support
------------------------------------
Python can now be built ``--with-dtrace`` which enables static markers
for the following events in the interpreter:
* function call/return
* garbage collection started/finished
* line of code executed.
This can be used to instrument running interpreters in production,
without the need to recompile specific debug builds or providing
application-specific profiling/debugging code.
More details in:ref:`instrumentation`.
The current implementation is tested on Linux and macOS. Additional
markers may be added in the future.
(Contributed by Łukasz Langa in :issue:`21590`, based on patches by
Jesús Cea Avión, David Malcolm, and Nikhil Benesch.)
.. _whatsnew-deforder:
PEP 520: Preserving Class Attribute Definition Order

19
Include/pydtrace.d Normal file
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@ -0,0 +1,19 @@
/* Python DTrace provider */
provider python {
probe function__entry(const char *, const char *, int);
probe function__return(const char *, const char *, int);
probe instance__new__start(const char *, const char *);
probe instance__new__done(const char *, const char *);
probe instance__delete__start(const char *, const char *);
probe instance__delete__done(const char *, const char *);
probe line(const char *, const char *, int);
probe gc__start(int);
probe gc__done(long);
};
#pragma D attributes Evolving/Evolving/Common provider python provider
#pragma D attributes Evolving/Evolving/Common provider python module
#pragma D attributes Evolving/Evolving/Common provider python function
#pragma D attributes Evolving/Evolving/Common provider python name
#pragma D attributes Evolving/Evolving/Common provider python args

47
Include/pydtrace.h Normal file
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@ -0,0 +1,47 @@
/* Static DTrace probes interface */
#ifndef Py_DTRACE_H
#define Py_DTRACE_H
#ifdef WITH_DTRACE
#include "pydtrace_probes.h"
/* pydtrace_probes.h, on systems with DTrace, is auto-generated to include
`PyDTrace_{PROBE}` and `PyDTrace_{PROBE}_ENABLED()` macros for every probe
defined in pydtrace_provider.d.
Calling these functions must be guarded by a `PyDTrace_{PROBE}_ENABLED()`
check to minimize performance impact when probing is off. For example:
if (PyDTrace_FUNCTION_ENTRY_ENABLED())
PyDTrace_FUNCTION_ENTRY(f);
*/
#else
/* Without DTrace, compile to nothing. */
#define PyDTrace_LINE(arg0, arg1, arg2, arg3) do ; while (0)
#define PyDTrace_FUNCTION_ENTRY(arg0, arg1, arg2) do ; while (0)
#define PyDTrace_FUNCTION_RETURN(arg0, arg1, arg2) do ; while (0)
#define PyDTrace_GC_START(arg0) do ; while (0)
#define PyDTrace_GC_DONE(arg0) do ; while (0)
#define PyDTrace_INSTANCE_NEW_START(arg0) do ; while (0)
#define PyDTrace_INSTANCE_NEW_DONE(arg0) do ; while (0)
#define PyDTrace_INSTANCE_DELETE_START(arg0) do ; while (0)
#define PyDTrace_INSTANCE_DELETE_DONE(arg0) do ; while (0)
#define PyDTrace_LINE_ENABLED() (0)
#define PyDTrace_FUNCTION_ENTRY_ENABLED() (0)
#define PyDTrace_FUNCTION_RETURN_ENABLED() (0)
#define PyDTrace_GC_START_ENABLED() (0)
#define PyDTrace_GC_DONE_ENABLED() (0)
#define PyDTrace_INSTANCE_NEW_START_ENABLED() (0)
#define PyDTrace_INSTANCE_NEW_DONE_ENABLED() (0)
#define PyDTrace_INSTANCE_DELETE_START_ENABLED() (0)
#define PyDTrace_INSTANCE_DELETE_DONE_ENABLED() (0)
#endif /* !WITH_DTRACE */
#endif /* !Py_DTRACE_H */

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@ -0,0 +1,5 @@
BEGIN
{
printf("probe: success\n");
exit(0);
}

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@ -0,0 +1,5 @@
probe begin
{
println("probe: success")
exit ()
}

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@ -0,0 +1,31 @@
self int indent;
python$target:::function-entry
/copyinstr(arg1) == "start"/
{
self->trace = 1;
}
python$target:::function-entry
/self->trace/
{
printf("%d\t%*s:", timestamp, 15, probename);
printf("%*s", self->indent, "");
printf("%s:%s:%d\n", basename(copyinstr(arg0)), copyinstr(arg1), arg2);
self->indent++;
}
python$target:::function-return
/self->trace/
{
self->indent--;
printf("%d\t%*s:", timestamp, 15, probename);
printf("%*s", self->indent, "");
printf("%s:%s:%d\n", basename(copyinstr(arg0)), copyinstr(arg1), arg2);
}
python$target:::function-return
/copyinstr(arg1) == "start"/
{
self->trace = 0;
}

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@ -0,0 +1,18 @@
function-entry:call_stack.py:start:23
function-entry: call_stack.py:function_1:1
function-entry: call_stack.py:function_3:9
function-return: call_stack.py:function_3:10
function-return: call_stack.py:function_1:2
function-entry: call_stack.py:function_2:5
function-entry: call_stack.py:function_1:1
function-entry: call_stack.py:function_3:9
function-return: call_stack.py:function_3:10
function-return: call_stack.py:function_1:2
function-return: call_stack.py:function_2:6
function-entry: call_stack.py:function_3:9
function-return: call_stack.py:function_3:10
function-entry: call_stack.py:function_4:13
function-return: call_stack.py:function_4:14
function-entry: call_stack.py:function_5:18
function-return: call_stack.py:function_5:21
function-return:call_stack.py:start:28

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@ -0,0 +1,30 @@
def function_1():
function_3(1, 2)
# Check stacktrace
def function_2():
function_1()
# CALL_FUNCTION_VAR
def function_3(dummy, dummy2):
pass
# CALL_FUNCTION_KW
def function_4(**dummy):
return 1
return 2 # unreachable
# CALL_FUNCTION_VAR_KW
def function_5(dummy, dummy2, **dummy3):
if False:
return 7
return 8
def start():
function_1()
function_2()
function_3(1, 2)
function_4(test=42)
function_5(*(1, 2), **{"test": 42})
start()

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@ -0,0 +1,41 @@
global tracing
function basename:string(path:string)
{
last_token = token = tokenize(path, "/");
while (token != "") {
last_token = token;
token = tokenize("", "/");
}
return last_token;
}
probe process.mark("function__entry")
{
funcname = user_string($arg2);
if (funcname == "start") {
tracing = 1;
}
}
probe process.mark("function__entry"), process.mark("function__return")
{
filename = user_string($arg1);
funcname = user_string($arg2);
lineno = $arg3;
if (tracing) {
printf("%d\t%s:%s:%s:%d\n", gettimeofday_us(), $$name,
basename(filename), funcname, lineno);
}
}
probe process.mark("function__return")
{
funcname = user_string($arg2);
if (funcname == "start") {
tracing = 0;
}
}

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@ -0,0 +1,14 @@
function__entry:call_stack.py:start:23
function__entry:call_stack.py:function_1:1
function__return:call_stack.py:function_1:2
function__entry:call_stack.py:function_2:5
function__entry:call_stack.py:function_1:1
function__return:call_stack.py:function_1:2
function__return:call_stack.py:function_2:6
function__entry:call_stack.py:function_3:9
function__return:call_stack.py:function_3:10
function__entry:call_stack.py:function_4:13
function__return:call_stack.py:function_4:14
function__entry:call_stack.py:function_5:18
function__return:call_stack.py:function_5:21
function__return:call_stack.py:start:28

18
Lib/test/dtracedata/gc.d Normal file
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@ -0,0 +1,18 @@
python$target:::function-entry
/copyinstr(arg1) == "start"/
{
self->trace = 1;
}
python$target:::gc-start,
python$target:::gc-done
/self->trace/
{
printf("%d\t%s:%ld\n", timestamp, probename, arg0);
}
python$target:::function-return
/copyinstr(arg1) == "start"/
{
self->trace = 0;
}

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@ -0,0 +1,8 @@
gc-start:0
gc-done:0
gc-start:1
gc-done:0
gc-start:2
gc-done:0
gc-start:2
gc-done:1

13
Lib/test/dtracedata/gc.py Normal file
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@ -0,0 +1,13 @@
import gc
def start():
gc.collect(0)
gc.collect(1)
gc.collect(2)
l = []
l.append(l)
del l
gc.collect(2)
gc.collect()
start()

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@ -0,0 +1,26 @@
global tracing
probe process.mark("function__entry")
{
funcname = user_string($arg2);
if (funcname == "start") {
tracing = 1;
}
}
probe process.mark("gc__start"), process.mark("gc__done")
{
if (tracing) {
printf("%d\t%s:%ld\n", gettimeofday_us(), $$name, $arg1);
}
}
probe process.mark("function__return")
{
funcname = user_string($arg2);
if (funcname == "start") {
tracing = 0;
}
}

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@ -0,0 +1,8 @@
gc__start:0
gc__done:0
gc__start:1
gc__done:0
gc__start:2
gc__done:0
gc__start:2
gc__done:1

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@ -0,0 +1,24 @@
import gc
class old_style_class():
pass
class new_style_class(object):
pass
a = old_style_class()
del a
gc.collect()
b = new_style_class()
del b
gc.collect()
a = old_style_class()
del old_style_class
gc.collect()
b = new_style_class()
del new_style_class
gc.collect()
del a
gc.collect()
del b
gc.collect()

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@ -0,0 +1,7 @@
python$target:::line
/(copyinstr(arg1)=="test_line")/
{
printf("%d\t%s:%s:%s:%d\n", timestamp,
probename, basename(copyinstr(arg0)),
copyinstr(arg1), arg2);
}

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@ -0,0 +1,20 @@
line:line.py:test_line:2
line:line.py:test_line:3
line:line.py:test_line:4
line:line.py:test_line:5
line:line.py:test_line:6
line:line.py:test_line:7
line:line.py:test_line:8
line:line.py:test_line:9
line:line.py:test_line:10
line:line.py:test_line:11
line:line.py:test_line:4
line:line.py:test_line:5
line:line.py:test_line:6
line:line.py:test_line:7
line:line.py:test_line:8
line:line.py:test_line:10
line:line.py:test_line:11
line:line.py:test_line:4
line:line.py:test_line:12
line:line.py:test_line:13

View File

@ -0,0 +1,17 @@
def test_line():
a = 1
print('# Preamble', a)
for i in range(2):
a = i
b = i+2
c = i+3
if c < 4:
a = c
d = a + b +c
print('#', a, b, c, d)
a = 1
print('# Epilogue', a)
if __name__ == '__main__':
test_line()

178
Lib/test/test_dtrace.py Normal file
View File

@ -0,0 +1,178 @@
import dis
import os.path
import re
import subprocess
import sys
import types
import unittest
from test.support import findfile, run_unittest
def abspath(filename):
return os.path.abspath(findfile(filename, subdir="dtracedata"))
def normalize_trace_output(output):
"""Normalize DTrace output for comparison.
DTrace keeps a per-CPU buffer, and when showing the fired probes, buffers
are concatenated. So if the operating system moves our thread around, the
straight result can be "non-causal". So we add timestamps to the probe
firing, sort by that field, then strip it from the output"""
# When compiling with '--with-pydebug', strip '[# refs]' debug output.
output = re.sub(r"\[[0-9]+ refs\]", "", output)
try:
result = [
row.split("\t")
for row in output.splitlines()
if row and not row.startswith('#')
]
result.sort(key=lambda row: int(row[0]))
result = [row[1] for row in result]
return "\n".join(result)
except (IndexError, ValueError):
raise AssertionError(
"tracer produced unparseable output:\n{}".format(output)
)
class TraceBackend:
EXTENSION = None
COMMAND = None
COMMAND_ARGS = []
def run_case(self, name, optimize_python=None):
actual_output = normalize_trace_output(self.trace_python(
script_file=abspath(name + self.EXTENSION),
python_file=abspath(name + ".py"),
optimize_python=optimize_python))
with open(abspath(name + self.EXTENSION + ".expected")) as f:
expected_output = f.read().rstrip()
return (expected_output, actual_output)
def generate_trace_command(self, script_file, subcommand=None):
command = self.COMMAND + [script_file]
if subcommand:
command += ["-c", subcommand]
return command
def trace(self, script_file, subcommand=None):
command = self.generate_trace_command(script_file, subcommand)
stdout, _ = subprocess.Popen(command,
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT,
universal_newlines=True).communicate()
return stdout
def trace_python(self, script_file, python_file, optimize_python=None):
python_flags = []
if optimize_python:
python_flags.extend(["-O"] * optimize_python)
subcommand = " ".join([sys.executable] + python_flags + [python_file])
return self.trace(script_file, subcommand)
def assert_usable(self):
try:
output = self.trace(abspath("assert_usable" + self.EXTENSION))
output = output.strip()
except FileNotFoundError as fnfe:
output = str(fnfe)
if output != "probe: success":
raise unittest.SkipTest(
"{}(1) failed: {}".format(self.COMMAND[0], output)
)
class DTraceBackend(TraceBackend):
EXTENSION = ".d"
COMMAND = ["dtrace", "-q", "-s"]
class SystemTapBackend(TraceBackend):
EXTENSION = ".stp"
COMMAND = ["stap", "-g"]
class TraceTests(unittest.TestCase):
# unittest.TestCase options
maxDiff = None
# TraceTests options
backend = None
optimize_python = 0
@classmethod
def setUpClass(self):
self.backend.assert_usable()
def run_case(self, name):
actual_output, expected_output = self.backend.run_case(
name, optimize_python=self.optimize_python)
self.assertEqual(actual_output, expected_output)
def test_function_entry_return(self):
self.run_case("call_stack")
def test_verify_call_opcodes(self):
"""Ensure our call stack test hits all function call opcodes"""
opcodes = set(["CALL_FUNCTION", "CALL_FUNCTION_EX", "CALL_FUNCTION_KW"])
with open(abspath("call_stack.py")) as f:
code_string = f.read()
def get_function_instructions(funcname):
# Recompile with appropriate optimization setting
code = compile(source=code_string,
filename="<string>",
mode="exec",
optimize=self.optimize_python)
for c in code.co_consts:
if isinstance(c, types.CodeType) and c.co_name == funcname:
return dis.get_instructions(c)
return []
for instruction in get_function_instructions('start'):
opcodes.discard(instruction.opname)
self.assertEqual(set(), opcodes)
def test_gc(self):
self.run_case("gc")
def test_line(self):
self.run_case("line")
class DTraceNormalTests(TraceTests):
backend = DTraceBackend()
optimize_python = 0
class DTraceOptimizedTests(TraceTests):
backend = DTraceBackend()
optimize_python = 2
class SystemTapNormalTests(TraceTests):
backend = SystemTapBackend()
optimize_python = 0
class SystemTapOptimizedTests(TraceTests):
backend = SystemTapBackend()
optimize_python = 2
def test_main():
run_unittest(DTraceNormalTests, DTraceOptimizedTests, SystemTapNormalTests,
SystemTapOptimizedTests)
if __name__ == '__main__':
test_main()

View File

@ -48,6 +48,10 @@ PGO_PROF_USE_FLAG=@PGO_PROF_USE_FLAG@
LLVM_PROF_MERGER=@LLVM_PROF_MERGER@
LLVM_PROF_FILE=@LLVM_PROF_FILE@
LLVM_PROF_ERR=@LLVM_PROF_ERR@
DTRACE= @DTRACE@
DFLAGS= @DFLAGS@
DTRACE_HEADERS= @DTRACE_HEADERS@
DTRACE_OBJS= @DTRACE_OBJS@
GNULD= @GNULD@
@ -315,7 +319,7 @@ OPCODE_H_DIR= $(srcdir)/Include
OPCODE_H_SCRIPT= $(srcdir)/Tools/scripts/generate_opcode_h.py
OPCODE_H= $(OPCODE_H_DIR)/opcode.h
OPCODE_H_GEN= $(PYTHON_FOR_GEN) $(OPCODE_H_SCRIPT) $(srcdir)/Lib/opcode.py $(OPCODE_H)
#
##########################################################################
# AST
AST_H_DIR= Include
@ -391,7 +395,8 @@ PYTHON_OBJS= \
Python/$(DYNLOADFILE) \
$(LIBOBJS) \
$(MACHDEP_OBJS) \
$(THREADOBJ)
$(THREADOBJ) \
$(DTRACE_OBJS)
##########################################################################
@ -451,6 +456,15 @@ LIBRARY_OBJS= \
$(LIBRARY_OBJS_OMIT_FROZEN) \
Python/frozen.o
##########################################################################
# DTrace
# On some systems, object files that reference DTrace probes need to be modified
# in-place by dtrace(1).
DTRACE_DEPS = \
Python/ceval.o
# XXX: should gcmodule, etc. be here, too?
#########################################################################
# Rules
@ -852,6 +866,18 @@ Python/ceval.o: $(OPCODETARGETS_H) $(srcdir)/Python/ceval_gil.h
Python/frozen.o: Python/importlib.h Python/importlib_external.h
# Generate DTrace probe macros, then rename them (PYTHON_ -> PyDTrace_) to
# follow our naming conventions. dtrace(1) uses the output filename to generate
# an include guard, so we can't use a pipeline to transform its output.
Include/pydtrace_probes.h: $(srcdir)/Include/pydtrace.d
$(DTRACE) $(DFLAGS) -o $@ -h -s $<
: sed in-place edit with POSIX-only tools
sed 's/PYTHON_/PyDTrace_/' $@ > $@.tmp
mv $@.tmp $@
Python/pydtrace.o: $(srcdir)/Include/pydtrace.d $(DTRACE_DEPS)
$(DTRACE) $(DFLAGS) -o $@ -G -s $< $(DTRACE_DEPS)
Objects/typeobject.o: Objects/typeslots.inc
Objects/typeslots.inc: $(srcdir)/Include/typeslots.h $(srcdir)/Objects/typeslots.py
$(PYTHON_FOR_GEN) $(srcdir)/Objects/typeslots.py < $(srcdir)/Include/typeslots.h Objects/typeslots.inc
@ -918,6 +944,7 @@ PYTHON_HEADERS= \
$(srcdir)/Include/pycapsule.h \
$(srcdir)/Include/pyctype.h \
$(srcdir)/Include/pydebug.h \
$(srcdir)/Include/pydtrace.h \
$(srcdir)/Include/pyerrors.h \
$(srcdir)/Include/pyfpe.h \
$(srcdir)/Include/pyhash.h \
@ -949,7 +976,8 @@ PYTHON_HEADERS= \
$(srcdir)/Include/weakrefobject.h \
pyconfig.h \
$(PARSER_HEADERS) \
$(AST_H)
$(AST_H) \
$(DTRACE_HEADERS)
$(LIBRARY_OBJS) $(MODOBJS) Programs/python.o: $(PYTHON_HEADERS)
@ -1158,6 +1186,7 @@ LIBSUBDIRS= tkinter tkinter/test tkinter/test/test_tkinter \
test/audiodata \
test/capath test/data \
test/cjkencodings test/decimaltestdata test/xmltestdata \
test/dtracedata \
test/eintrdata \
test/imghdrdata \
test/libregrtest \
@ -1569,6 +1598,7 @@ clean: pycremoval
-rm -f Lib/lib2to3/*Grammar*.pickle
-rm -f Programs/_testembed Programs/_freeze_importlib
-find build -type f -a ! -name '*.gc??' -exec rm -f {} ';'
-rm -f Include/pydtrace_probes.h
profile-removal:
find . -name '*.gc??' -exec rm -f {} ';'

View File

@ -120,6 +120,7 @@ Ben Bell
Thomas Bellman
Alexander “Саша” Belopolsky
Eli Bendersky
Nikhil Benesch
David Benjamin
Oscar Benjamin
Andrew Bennetts

View File

@ -329,6 +329,8 @@ Build
make time when --with-optimizations is enabled. Also improve our
ability to find the llvm-profdata tool on MacOS and some Linuxes.
- Issue #21590: Support for DTrace and SystemTap probes.
- Issue #26307: The profile-opt build now applys PGO to the built-in modules.
- Issue #26539: Add the --with-optimizations flag to turn on LTO and PGO build

View File

@ -25,6 +25,7 @@
#include "Python.h"
#include "frameobject.h" /* for PyFrame_ClearFreeList */
#include "pydtrace.h"
#include "pytime.h" /* for _PyTime_GetMonotonicClock() */
/* Get an object's GC head */
@ -925,6 +926,9 @@ collect(int generation, Py_ssize_t *n_collected, Py_ssize_t *n_uncollectable,
PySys_WriteStderr("\n");
}
if (PyDTrace_GC_START_ENABLED())
PyDTrace_GC_START(generation);
/* update collection and allocation counters */
if (generation+1 < NUM_GENERATIONS)
generations[generation+1].count += 1;
@ -1069,6 +1073,10 @@ collect(int generation, Py_ssize_t *n_collected, Py_ssize_t *n_uncollectable,
stats->collections++;
stats->collected += m;
stats->uncollectable += n;
if (PyDTrace_GC_DONE_ENABLED())
PyDTrace_GC_DONE(n+m);
return n+m;
}

View File

@ -15,6 +15,7 @@
#include "dictobject.h"
#include "frameobject.h"
#include "opcode.h"
#include "pydtrace.h"
#include "setobject.h"
#include "structmember.h"
@ -50,6 +51,9 @@ static void call_exc_trace(Py_tracefunc, PyObject *,
PyThreadState *, PyFrameObject *);
static int maybe_call_line_trace(Py_tracefunc, PyObject *,
PyThreadState *, PyFrameObject *, int *, int *, int *);
static void maybe_dtrace_line(PyFrameObject *, int *, int *, int *);
static void dtrace_function_entry(PyFrameObject *);
static void dtrace_function_return(PyFrameObject *);
static PyObject * cmp_outcome(int, PyObject *, PyObject *);
static PyObject * import_name(PyFrameObject *, PyObject *, PyObject *, PyObject *);
@ -822,7 +826,7 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag)
#ifdef LLTRACE
#define FAST_DISPATCH() \
{ \
if (!lltrace && !_Py_TracingPossible) { \
if (!lltrace && !_Py_TracingPossible && !PyDTrace_LINE_ENABLED()) { \
f->f_lasti = INSTR_OFFSET(); \
NEXTOPARG(); \
goto *opcode_targets[opcode]; \
@ -832,7 +836,7 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag)
#else
#define FAST_DISPATCH() \
{ \
if (!_Py_TracingPossible) { \
if (!_Py_TracingPossible && !PyDTrace_LINE_ENABLED()) { \
f->f_lasti = INSTR_OFFSET(); \
NEXTOPARG(); \
goto *opcode_targets[opcode]; \
@ -1042,6 +1046,9 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag)
}
}
if (PyDTrace_FUNCTION_ENTRY_ENABLED())
dtrace_function_entry(f);
co = f->f_code;
names = co->co_names;
consts = co->co_consts;
@ -1162,6 +1169,9 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag)
fast_next_opcode:
f->f_lasti = INSTR_OFFSET();
if (PyDTrace_LINE_ENABLED())
maybe_dtrace_line(f, &instr_lb, &instr_ub, &instr_prev);
/* line-by-line tracing support */
if (_Py_TracingPossible &&
@ -3620,6 +3630,8 @@ fast_yield:
/* pop frame */
exit_eval_frame:
if (PyDTrace_FUNCTION_RETURN_ENABLED())
dtrace_function_return(f);
Py_LeaveRecursiveCall();
f->f_executing = 0;
tstate->frame = f->f_back;
@ -5415,3 +5427,65 @@ _PyEval_RequestCodeExtraIndex(freefunc free)
tstate->co_extra_freefuncs[new_index] = free;
return new_index;
}
static void
dtrace_function_entry(PyFrameObject *f)
{
char* filename;
char* funcname;
int lineno;
filename = PyUnicode_AsUTF8(f->f_code->co_filename);
funcname = PyUnicode_AsUTF8(f->f_code->co_name);
lineno = PyCode_Addr2Line(f->f_code, f->f_lasti);
PyDTrace_FUNCTION_ENTRY(filename, funcname, lineno);
}
static void
dtrace_function_return(PyFrameObject *f)
{
char* filename;
char* funcname;
int lineno;
filename = PyUnicode_AsUTF8(f->f_code->co_filename);
funcname = PyUnicode_AsUTF8(f->f_code->co_name);
lineno = PyCode_Addr2Line(f->f_code, f->f_lasti);
PyDTrace_FUNCTION_RETURN(filename, funcname, lineno);
}
/* DTrace equivalent of maybe_call_line_trace. */
static void
maybe_dtrace_line(PyFrameObject *frame,
int *instr_lb, int *instr_ub, int *instr_prev)
{
int line = frame->f_lineno;
char *co_filename, *co_name;
/* If the last instruction executed isn't in the current
instruction window, reset the window.
*/
if (frame->f_lasti < *instr_lb || frame->f_lasti >= *instr_ub) {
PyAddrPair bounds;
line = _PyCode_CheckLineNumber(frame->f_code, frame->f_lasti,
&bounds);
*instr_lb = bounds.ap_lower;
*instr_ub = bounds.ap_upper;
}
/* If the last instruction falls at the start of a line or if
it represents a jump backwards, update the frame's line
number and call the trace function. */
if (frame->f_lasti == *instr_lb || frame->f_lasti < *instr_prev) {
frame->f_lineno = line;
co_filename = PyUnicode_AsUTF8(frame->f_code->co_filename);
if (!co_filename)
co_filename = "?";
co_name = PyUnicode_AsUTF8(frame->f_code->co_name);
if (!co_name)
co_name = "?";
PyDTrace_LINE(co_filename, co_name, line);
}
*instr_prev = frame->f_lasti;
}

186
configure vendored
View File

@ -642,6 +642,10 @@ TRUE
MACHDEP_OBJS
DYNLOADFILE
DLINCLDIR
DTRACE_OBJS
DTRACE_HEADERS
DFLAGS
DTRACE
THREADOBJ
LDLAST
USE_THREAD_MODULE
@ -713,6 +717,7 @@ MULTIARCH
ac_ct_CXX
MAINCC
CXX
SED
GREP
CPP
OBJEXT
@ -780,7 +785,6 @@ infodir
docdir
oldincludedir
includedir
runstatedir
localstatedir
sharedstatedir
sysconfdir
@ -832,6 +836,7 @@ enable_ipv6
with_doc_strings
with_pymalloc
with_valgrind
with_dtrace
with_fpectl
with_libm
with_libc
@ -890,7 +895,6 @@ datadir='${datarootdir}'
sysconfdir='${prefix}/etc'
sharedstatedir='${prefix}/com'
localstatedir='${prefix}/var'
runstatedir='${localstatedir}/run'
includedir='${prefix}/include'
oldincludedir='/usr/include'
docdir='${datarootdir}/doc/${PACKAGE_TARNAME}'
@ -1143,15 +1147,6 @@ do
| -silent | --silent | --silen | --sile | --sil)
silent=yes ;;
-runstatedir | --runstatedir | --runstatedi | --runstated \
| --runstate | --runstat | --runsta | --runst | --runs \
| --run | --ru | --r)
ac_prev=runstatedir ;;
-runstatedir=* | --runstatedir=* | --runstatedi=* | --runstated=* \
| --runstate=* | --runstat=* | --runsta=* | --runst=* | --runs=* \
| --run=* | --ru=* | --r=*)
runstatedir=$ac_optarg ;;
-sbindir | --sbindir | --sbindi | --sbind | --sbin | --sbi | --sb)
ac_prev=sbindir ;;
-sbindir=* | --sbindir=* | --sbindi=* | --sbind=* | --sbin=* \
@ -1289,7 +1284,7 @@ fi
for ac_var in exec_prefix prefix bindir sbindir libexecdir datarootdir \
datadir sysconfdir sharedstatedir localstatedir includedir \
oldincludedir docdir infodir htmldir dvidir pdfdir psdir \
libdir localedir mandir runstatedir
libdir localedir mandir
do
eval ac_val=\$$ac_var
# Remove trailing slashes.
@ -1442,7 +1437,6 @@ Fine tuning of the installation directories:
--sysconfdir=DIR read-only single-machine data [PREFIX/etc]
--sharedstatedir=DIR modifiable architecture-independent data [PREFIX/com]
--localstatedir=DIR modifiable single-machine data [PREFIX/var]
--runstatedir=DIR modifiable per-process data [LOCALSTATEDIR/run]
--libdir=DIR object code libraries [EPREFIX/lib]
--includedir=DIR C header files [PREFIX/include]
--oldincludedir=DIR C header files for non-gcc [/usr/include]
@ -1535,6 +1529,7 @@ Optional Packages:
--with(out)-doc-strings disable/enable documentation strings
--with(out)-pymalloc disable/enable specialized mallocs
--with-valgrind Enable Valgrind support
--with(out)-dtrace disable/enable DTrace support
--with-fpectl enable SIGFPE catching
--with-libm=STRING math library
--with-libc=STRING C library
@ -4581,6 +4576,75 @@ $as_echo "$ac_cv_path_GREP" >&6; }
GREP="$ac_cv_path_GREP"
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for a sed that does not truncate output" >&5
$as_echo_n "checking for a sed that does not truncate output... " >&6; }
if ${ac_cv_path_SED+:} false; then :
$as_echo_n "(cached) " >&6
else
ac_script=s/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb/
for ac_i in 1 2 3 4 5 6 7; do
ac_script="$ac_script$as_nl$ac_script"
done
echo "$ac_script" 2>/dev/null | sed 99q >conftest.sed
{ ac_script=; unset ac_script;}
if test -z "$SED"; then
ac_path_SED_found=false
# Loop through the user's path and test for each of PROGNAME-LIST
as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
for as_dir in $PATH
do
IFS=$as_save_IFS
test -z "$as_dir" && as_dir=.
for ac_prog in sed gsed; do
for ac_exec_ext in '' $ac_executable_extensions; do
ac_path_SED="$as_dir/$ac_prog$ac_exec_ext"
as_fn_executable_p "$ac_path_SED" || continue
# Check for GNU ac_path_SED and select it if it is found.
# Check for GNU $ac_path_SED
case `"$ac_path_SED" --version 2>&1` in
*GNU*)
ac_cv_path_SED="$ac_path_SED" ac_path_SED_found=:;;
*)
ac_count=0
$as_echo_n 0123456789 >"conftest.in"
while :
do
cat "conftest.in" "conftest.in" >"conftest.tmp"
mv "conftest.tmp" "conftest.in"
cp "conftest.in" "conftest.nl"
$as_echo '' >> "conftest.nl"
"$ac_path_SED" -f conftest.sed < "conftest.nl" >"conftest.out" 2>/dev/null || break
diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
as_fn_arith $ac_count + 1 && ac_count=$as_val
if test $ac_count -gt ${ac_path_SED_max-0}; then
# Best one so far, save it but keep looking for a better one
ac_cv_path_SED="$ac_path_SED"
ac_path_SED_max=$ac_count
fi
# 10*(2^10) chars as input seems more than enough
test $ac_count -gt 10 && break
done
rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
esac
$ac_path_SED_found && break 3
done
done
done
IFS=$as_save_IFS
if test -z "$ac_cv_path_SED"; then
as_fn_error $? "no acceptable sed could be found in \$PATH" "$LINENO" 5
fi
else
ac_cv_path_SED=$SED
fi
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_SED" >&5
$as_echo "$ac_cv_path_SED" >&6; }
SED="$ac_cv_path_SED"
rm -f conftest.sed
@ -10864,6 +10928,102 @@ fi
OPT="-DDYNAMIC_ANNOTATIONS_ENABLED=1 $OPT"
fi
# Check for DTrace support
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for --with-dtrace" >&5
$as_echo_n "checking for --with-dtrace... " >&6; }
# Check whether --with-dtrace was given.
if test "${with_dtrace+set}" = set; then :
withval=$with_dtrace;
else
with_dtrace=no
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $with_dtrace" >&5
$as_echo "$with_dtrace" >&6; }
DTRACE=
DFLAGS=
DTRACE_HEADERS=
DTRACE_OBJS=
if test "$with_dtrace" = "yes"
then
# Extract the first word of "dtrace", so it can be a program name with args.
set dummy dtrace; ac_word=$2
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
$as_echo_n "checking for $ac_word... " >&6; }
if ${ac_cv_path_DTRACE+:} false; then :
$as_echo_n "(cached) " >&6
else
case $DTRACE in
[\\/]* | ?:[\\/]*)
ac_cv_path_DTRACE="$DTRACE" # Let the user override the test with a path.
;;
*)
as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
for as_dir in $PATH
do
IFS=$as_save_IFS
test -z "$as_dir" && as_dir=.
for ac_exec_ext in '' $ac_executable_extensions; do
if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
ac_cv_path_DTRACE="$as_dir/$ac_word$ac_exec_ext"
$as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
break 2
fi
done
done
IFS=$as_save_IFS
test -z "$ac_cv_path_DTRACE" && ac_cv_path_DTRACE="not found"
;;
esac
fi
DTRACE=$ac_cv_path_DTRACE
if test -n "$DTRACE"; then
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $DTRACE" >&5
$as_echo "$DTRACE" >&6; }
else
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
$as_echo "no" >&6; }
fi
if test "$DTRACE" = "not found"; then
as_fn_error $? "dtrace command not found on \$PATH" "$LINENO" 5
fi
$as_echo "#define WITH_DTRACE 1" >>confdefs.h
DTRACE_HEADERS="Include/pydtrace_probes.h"
# On OS X, DTrace providers do not need to be explicitly compiled and
# linked into the binary. Correspondingly, dtrace(1) is missing the ELF
# generation flag '-G'. We check for presence of this flag, rather than
# hardcoding support by OS, in the interest of robustness.
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether DTrace probes require linking" >&5
$as_echo_n "checking whether DTrace probes require linking... " >&6; }
if ${ac_cv_dtrace_link+:} false; then :
$as_echo_n "(cached) " >&6
else
ac_cv_dtrace_link=no
echo 'BEGIN' > conftest.d
"$DTRACE" -G -s conftest.d -o conftest.o > /dev/null 2>&1 && \
ac_cv_dtrace_link=yes
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_dtrace_link" >&5
$as_echo "$ac_cv_dtrace_link" >&6; }
if test "$ac_cv_dtrace_link" = "yes"; then
DTRACE_OBJS="Python/pydtrace.o"
fi
fi
# -I${DLINCLDIR} is added to the compile rule for importdl.o
DLINCLDIR=.

View File

@ -694,6 +694,7 @@ fi
AC_PROG_CC
AC_PROG_CPP
AC_PROG_GREP
AC_PROG_SED
AC_SUBST(CXX)
AC_SUBST(MAINCC)
@ -3245,6 +3246,47 @@ if test "$with_valgrind" != no; then
OPT="-DDYNAMIC_ANNOTATIONS_ENABLED=1 $OPT"
fi
# Check for DTrace support
AC_MSG_CHECKING(for --with-dtrace)
AC_ARG_WITH(dtrace,
AC_HELP_STRING(--with(out)-dtrace, [disable/enable DTrace support]),,
with_dtrace=no)
AC_MSG_RESULT($with_dtrace)
AC_SUBST(DTRACE)
AC_SUBST(DFLAGS)
AC_SUBST(DTRACE_HEADERS)
AC_SUBST(DTRACE_OBJS)
DTRACE=
DFLAGS=
DTRACE_HEADERS=
DTRACE_OBJS=
if test "$with_dtrace" = "yes"
then
AC_PATH_PROG(DTRACE, [dtrace], [not found])
if test "$DTRACE" = "not found"; then
AC_MSG_ERROR([dtrace command not found on \$PATH])
fi
AC_DEFINE(WITH_DTRACE, 1, [Define if you want to compile in DTrace support])
DTRACE_HEADERS="Include/pydtrace_probes.h"
# On OS X, DTrace providers do not need to be explicitly compiled and
# linked into the binary. Correspondingly, dtrace(1) is missing the ELF
# generation flag '-G'. We check for presence of this flag, rather than
# hardcoding support by OS, in the interest of robustness.
AC_CACHE_CHECK([whether DTrace probes require linking],
[ac_cv_dtrace_link], [dnl
ac_cv_dtrace_link=no
echo 'BEGIN' > conftest.d
"$DTRACE" -G -s conftest.d -o conftest.o > /dev/null 2>&1 && \
ac_cv_dtrace_link=yes
])
if test "$ac_cv_dtrace_link" = "yes"; then
DTRACE_OBJS="Python/pydtrace.o"
fi
fi
# -I${DLINCLDIR} is added to the compile rule for importdl.o
AC_SUBST(DLINCLDIR)
DLINCLDIR=.

View File

@ -1370,6 +1370,9 @@
/* Define if you want documentation strings in extension modules */
#undef WITH_DOC_STRINGS
/* Define if you want to compile in DTrace support */
#undef WITH_DTRACE
/* Define if you want to use the new-style (Openstep, Rhapsody, MacOS) dynamic
linker (dyld) instead of the old-style (NextStep) dynamic linker (rld).
Dyld is necessary to support frameworks. */