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import platform as host_platform
import py
import sys
import shutil
from rpython.tool.udir import udir
from rpython.tool.version import rpythonroot
from rpython.rtyper.lltypesystem import lltype, llmemory, rffi
from rpython.translator.tool.cbuild import ExternalCompilationInfo
from rpython.rtyper.tool import rffi_platform as platform
from rpython.rlib import rthread, jit
from rpython.rlib.objectmodel import we_are_translated
from rpython.config.translationoption import get_translation_config
from rpython.jit.backend import detect_cpu
class VMProfPlatformUnsupported(Exception):
pass
# vmprof works only on x86 for now
IS_SUPPORTED = False
if sys.platform in ('darwin', 'linux', 'linux2') or sys.platform.startswith('freebsd'):
try:
IS_SUPPORTED = detect_cpu.autodetect().startswith('x86')
except detect_cpu.ProcessorAutodetectError:
pass
ROOT = py.path.local(rpythonroot).join('rpython', 'rlib', 'rvmprof')
SRC = ROOT.join('src')
SHARED = SRC.join('shared')
BACKTRACE = SHARED.join('libbacktrace')
def make_eci():
if make_eci.called:
raise ValueError("make_eci() should be called at most once")
#
compile_extra = ['-DRPYTHON_VMPROF']
separate_module_files = [
SHARED.join('symboltable.c'),
SHARED.join('vmprof_unix.c')
]
if sys.platform.startswith('linux'):
separate_module_files += [
BACKTRACE.join('atomic.c'),
BACKTRACE.join('backtrace.c'),
BACKTRACE.join('state.c'),
BACKTRACE.join('elf.c'),
BACKTRACE.join('dwarf.c'),
BACKTRACE.join('fileline.c'),
BACKTRACE.join('mmap.c'),
BACKTRACE.join('mmapio.c'),
BACKTRACE.join('posix.c'),
BACKTRACE.join('sort.c'),
]
_libs = ['dl']
compile_extra += ['-DVMPROF_UNIX']
compile_extra += ['-DVMPROF_LINUX']
elif sys.platform == 'win32':
compile_extra += ['-DVMPROF_WINDOWS']
separate_module_files = [SHARED.join('vmprof_win.c')]
_libs = []
else:
# Guessing a BSD-like Unix platform
compile_extra += ['-DVMPROF_UNIX']
compile_extra += ['-DVMPROF_APPLE']
if sys.platform.startswith('freebsd'):
_libs = ['unwind']
else:
_libs = []
eci_kwds = dict(
include_dirs = [SRC, SHARED, BACKTRACE],
includes = ['rvmprof.h','vmprof_stack.h'],
libraries = _libs,
separate_module_files = [
SRC.join('rvmprof.c'),
SHARED.join('compat.c'),
SHARED.join('machine.c'),
SHARED.join('vmp_stack.c'),
SHARED.join('vmprof_memory.c'),
SHARED.join('vmprof_common.c'),
# symbol table already in separate_module_files
] + separate_module_files,
post_include_bits=[],
compile_extra=compile_extra
)
if sys.platform != 'win32':
eci_kwds['separate_module_files'].append(
SHARED.join('vmprof_mt.c'),
)
make_eci.called = True
return ExternalCompilationInfo(**eci_kwds), eci_kwds
make_eci.called = False
def configure_libbacktrace_linux():
bits = 32 if sys.maxsize == 2**31-1 else 64
# FIXME well, the config generated on x86 seems to work on s390x and ppc
# vmprof is currently not supported there! we just need to pass compilation
specific_config = 'config-x86_%d.h' % bits
config = BACKTRACE.join('config.h')
shutil.copy(str(BACKTRACE.join(specific_config)), str(config))
def setup():
if not IS_SUPPORTED:
raise VMProfPlatformUnsupported
if sys.platform.startswith('linux'):
configure_libbacktrace_linux()
eci, eci_kwds = make_eci()
eci_kwds['compile_extra'].append('-DRPYTHON_LL2CTYPES')
platform.verify_eci(ExternalCompilationInfo(
**eci_kwds))
vmprof_init = rffi.llexternal("vmprof_init",
[rffi.INT, rffi.DOUBLE, rffi.INT, rffi.INT,
rffi.CCHARP, rffi.INT, rffi.INT],
rffi.CCHARP, compilation_info=eci)
vmprof_enable = rffi.llexternal("vmprof_enable", [rffi.INT, rffi.INT, rffi.INT],
rffi.INT,
compilation_info=eci,
save_err=rffi.RFFI_SAVE_ERRNO)
vmprof_disable = rffi.llexternal("vmprof_disable", [], rffi.INT,
compilation_info=eci,
save_err=rffi.RFFI_SAVE_ERRNO)
vmprof_register_virtual_function = rffi.llexternal(
"vmprof_register_virtual_function",
[rffi.CCHARP, rffi.LONG, rffi.INT],
rffi.INT, compilation_info=eci)
vmprof_ignore_signals = rffi.llexternal("vmprof_ignore_signals",
[rffi.INT], lltype.Void,
compilation_info=eci,
_nowrapper=True)
vmprof_get_traceback = rffi.llexternal("vmprof_get_traceback",
[PVMPROFSTACK, llmemory.Address,
rffi.SIGNEDP, lltype.Signed],
lltype.Signed, compilation_info=eci,
_nowrapper=True)
vmprof_get_profile_path = rffi.llexternal("vmprof_get_profile_path", [rffi.CCHARP, lltype.Signed],
lltype.Signed, compilation_info=eci,
_nowrapper=True)
vmprof_stop_sampling = rffi.llexternal("vmprof_stop_sampling", [],
rffi.INT, compilation_info=eci,
_nowrapper=True)
vmprof_start_sampling = rffi.llexternal("vmprof_start_sampling", [],
lltype.Void, compilation_info=eci,
_nowrapper=True)
return CInterface(locals())
class CInterface(object):
def __init__(self, namespace):
for k, v in namespace.iteritems():
setattr(self, k, v)
def _freeze_(self):
return True
# --- copy a few declarations from src/vmprof_stack.h ---
VMPROF_CODE_TAG = 1
VMPROFSTACK = lltype.ForwardReference()
PVMPROFSTACK = lltype.Ptr(VMPROFSTACK)
VMPROFSTACK.become(rffi.CStruct("vmprof_stack_s",
('next', PVMPROFSTACK),
('value', lltype.Signed),
('kind', lltype.Signed)))
# ----------
vmprof_tl_stack = rthread.ThreadLocalField(PVMPROFSTACK, "vmprof_tl_stack")
do_use_eci = rffi.llexternal_use_eci(
ExternalCompilationInfo(includes=['vmprof_stack.h'],
include_dirs = [SRC]))
def enter_code(unique_id):
do_use_eci()
s = lltype.malloc(VMPROFSTACK, flavor='raw')
s.c_next = vmprof_tl_stack.get_or_make_raw()
s.c_value = unique_id
s.c_kind = VMPROF_CODE_TAG
vmprof_tl_stack.setraw(s)
return s
def leave_code(s):
if not we_are_translated():
assert vmprof_tl_stack.getraw() == s
vmprof_tl_stack.setraw(s.c_next)
lltype.free(s, flavor='raw')
#
# JIT notes:
#
# - When running JIT-generated assembler code, we have different custom
# code to build the VMPROFSTACK, so the functions above are not used.
# (It uses kind == VMPROF_JITTED_TAG and the VMPROFSTACK is allocated
# in the C stack.)
#
# - The jitcode for decorated_jitted_function() in rvmprof.py is
# special-cased by jtransform.py to produce this:
#
# rvmprof_code(0, unique_id)
# res = inline_call FUNC <- for func(*args)
# rvmprof_code(1, unique_id)
# return res
#
# There is no 'catch_exception', but the second 'rvmprof_code' is
# meant to be executed even in case there was an exception. This is
# done by a special case in pyjitpl.py and blackhole.py. The point
# is that the above simple pattern can be detected by the blackhole
# interp, when it first rebuilds all the intermediate RPython
# frames; at that point it needs to call jit_rvmprof_code(0) on all
# intermediate RPython frames, so it does pattern matching to
# recognize when it must call that and with which 'unique_id' value.
#
# - The jitcode opcode 'rvmprof_code' doesn't produce any resop. When
# meta-interpreting, it causes pyjitpl to call jit_rvmprof_code().
# As mentioned above, there is logic to call jit_rvmprof_code(1)
# even if we exit with an exception, even though there is no
# 'catch_exception'. There is similar logic inside the blackhole
# interpreter.
def jit_rvmprof_code(leaving, unique_id):
if leaving == 0:
enter_code(unique_id) # ignore the return value
else:
s = vmprof_tl_stack.getraw()
assert s.c_value == unique_id and s.c_kind == VMPROF_CODE_TAG
leave_code(s)
#
# traceback support
def get_rvmprof_stack():
return vmprof_tl_stack.get_or_make_raw()
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