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import platform as host_platform
import py
import sys
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
class VMProfPlatformUnsupported(Exception):
pass
ROOT = py.path.local(rpythonroot).join('rpython', 'rlib', 'rvmprof')
SRC = ROOT.join('src')
if sys.platform.startswith('linux'):
_libs = ['dl']
else:
_libs = []
eci_kwds = dict(
include_dirs = [SRC],
includes = ['rvmprof.h', 'vmprof_stack.h'],
libraries = _libs,
separate_module_files = [SRC.join('rvmprof.c')],
post_include_bits=['#define RPYTHON_VMPROF\n'],
)
global_eci = ExternalCompilationInfo(**eci_kwds)
def setup():
compile_extra = ['-DRPYTHON_LL2CTYPES']
platform.verify_eci(ExternalCompilationInfo(
compile_extra=compile_extra,
**eci_kwds))
eci = global_eci
vmprof_init = rffi.llexternal("vmprof_init",
[rffi.INT, rffi.DOUBLE, rffi.CCHARP],
rffi.CCHARP, compilation_info=eci)
vmprof_enable = rffi.llexternal("vmprof_enable", [], 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)
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)
#
# stacklet support
def save_rvmprof_stack():
return vmprof_tl_stack.get_or_make_raw()
def empty_rvmprof_stack():
vmprof_tl_stack.setraw(lltype.nullptr(VMPROFSTACK))
def restore_rvmprof_stack(x):
vmprof_tl_stack.setraw(x)
#
# traceback support
def get_rvmprof_stack():
return vmprof_tl_stack.get_or_make_raw()
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