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Merged
merged 8 commits into from
Aug 18, 2025
Merged

Make populating the internal symbol table thread-safe #835

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3fe6a3c
protect cuPythonInit in driver
leofang Aug 13, 2025
67e543c
add lock for all modules
kkraus14 Aug 13, 2025
cca86c0
fixes
kkraus14 Aug 13, 2025
095999a
fix identation, make consistent
kkraus14 Aug 13, 2025
47c1c52
relocate setting __cuPythonInit to avoid deadlock since we use cuGetP…
kkraus14 Aug 14, 2025
5f4125e
move init check inside lock
kkraus14 Aug 14, 2025
8e79272
make cuPythonInit reentrant + ensure GIL is released when calling und…
leofang Aug 15, 2025
1672f40
fix indentation
leofang Aug 15, 2025
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16,377 changes: 8,189 additions & 8,188 deletions cuda_bindings/cuda/bindings/_bindings/cydriver.pyx.in
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214 changes: 106 additions & 108 deletions cuda_bindings/cuda/bindings/_bindings/cynvrtc.pyx.in
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Original file line number Diff line number Diff line change
Expand Up @@ -11,7 +11,9 @@ from libc.stdint cimport uintptr_t
{{endif}}
from cuda.pathfinder import load_nvidia_dynamic_lib
from libc.stdint cimport intptr_t
import threading

cdef object __symbol_lock = threading.Lock()
cdef bint __cuPythonInit = False
{{if 'nvrtcGetErrorString' in found_functions}}cdef void *__nvrtcGetErrorString = NULL{{endif}}
{{if 'nvrtcVersion' in found_functions}}cdef void *__nvrtcVersion = NULL{{endif}}
Expand Down Expand Up @@ -42,21 +44,12 @@ cdef int cuPythonInit() except -1 nogil:
global __cuPythonInit
if __cuPythonInit:
return 0
__cuPythonInit = True

# Load library
{{if 'Windows' == platform.system()}}
with gil:
with gil, __symbol_lock:
{{if 'Windows' == platform.system()}}
handle = load_nvidia_dynamic_lib("nvrtc")._handle_uint
{{else}}
with gil:
handle = <void*><uintptr_t>load_nvidia_dynamic_lib("nvrtc")._handle_uint
{{endif}}


# Load function
{{if 'Windows' == platform.system()}}
with gil:
# Load function
{{if 'nvrtcGetErrorString' in found_functions}}
try:
global __nvrtcGetErrorString
Expand Down Expand Up @@ -227,105 +220,110 @@ cdef int cuPythonInit() except -1 nogil:
{{endif}}

{{else}}
{{if 'nvrtcGetErrorString' in found_functions}}
global __nvrtcGetErrorString
__nvrtcGetErrorString = dlfcn.dlsym(handle, 'nvrtcGetErrorString')
{{endif}}
{{if 'nvrtcVersion' in found_functions}}
global __nvrtcVersion
__nvrtcVersion = dlfcn.dlsym(handle, 'nvrtcVersion')
{{endif}}
{{if 'nvrtcGetNumSupportedArchs' in found_functions}}
global __nvrtcGetNumSupportedArchs
__nvrtcGetNumSupportedArchs = dlfcn.dlsym(handle, 'nvrtcGetNumSupportedArchs')
{{endif}}
{{if 'nvrtcGetSupportedArchs' in found_functions}}
global __nvrtcGetSupportedArchs
__nvrtcGetSupportedArchs = dlfcn.dlsym(handle, 'nvrtcGetSupportedArchs')
{{endif}}
{{if 'nvrtcCreateProgram' in found_functions}}
global __nvrtcCreateProgram
__nvrtcCreateProgram = dlfcn.dlsym(handle, 'nvrtcCreateProgram')
{{endif}}
{{if 'nvrtcDestroyProgram' in found_functions}}
global __nvrtcDestroyProgram
__nvrtcDestroyProgram = dlfcn.dlsym(handle, 'nvrtcDestroyProgram')
{{endif}}
{{if 'nvrtcCompileProgram' in found_functions}}
global __nvrtcCompileProgram
__nvrtcCompileProgram = dlfcn.dlsym(handle, 'nvrtcCompileProgram')
{{endif}}
{{if 'nvrtcGetPTXSize' in found_functions}}
global __nvrtcGetPTXSize
__nvrtcGetPTXSize = dlfcn.dlsym(handle, 'nvrtcGetPTXSize')
{{endif}}
{{if 'nvrtcGetPTX' in found_functions}}
global __nvrtcGetPTX
__nvrtcGetPTX = dlfcn.dlsym(handle, 'nvrtcGetPTX')
{{endif}}
{{if 'nvrtcGetCUBINSize' in found_functions}}
global __nvrtcGetCUBINSize
__nvrtcGetCUBINSize = dlfcn.dlsym(handle, 'nvrtcGetCUBINSize')
{{endif}}
{{if 'nvrtcGetCUBIN' in found_functions}}
global __nvrtcGetCUBIN
__nvrtcGetCUBIN = dlfcn.dlsym(handle, 'nvrtcGetCUBIN')
{{endif}}
{{if 'nvrtcGetLTOIRSize' in found_functions}}
global __nvrtcGetLTOIRSize
__nvrtcGetLTOIRSize = dlfcn.dlsym(handle, 'nvrtcGetLTOIRSize')
{{endif}}
{{if 'nvrtcGetLTOIR' in found_functions}}
global __nvrtcGetLTOIR
__nvrtcGetLTOIR = dlfcn.dlsym(handle, 'nvrtcGetLTOIR')
{{endif}}
{{if 'nvrtcGetOptiXIRSize' in found_functions}}
global __nvrtcGetOptiXIRSize
__nvrtcGetOptiXIRSize = dlfcn.dlsym(handle, 'nvrtcGetOptiXIRSize')
{{endif}}
{{if 'nvrtcGetOptiXIR' in found_functions}}
global __nvrtcGetOptiXIR
__nvrtcGetOptiXIR = dlfcn.dlsym(handle, 'nvrtcGetOptiXIR')
{{endif}}
{{if 'nvrtcGetProgramLogSize' in found_functions}}
global __nvrtcGetProgramLogSize
__nvrtcGetProgramLogSize = dlfcn.dlsym(handle, 'nvrtcGetProgramLogSize')
{{endif}}
{{if 'nvrtcGetProgramLog' in found_functions}}
global __nvrtcGetProgramLog
__nvrtcGetProgramLog = dlfcn.dlsym(handle, 'nvrtcGetProgramLog')
{{endif}}
{{if 'nvrtcAddNameExpression' in found_functions}}
global __nvrtcAddNameExpression
__nvrtcAddNameExpression = dlfcn.dlsym(handle, 'nvrtcAddNameExpression')
{{endif}}
{{if 'nvrtcGetLoweredName' in found_functions}}
global __nvrtcGetLoweredName
__nvrtcGetLoweredName = dlfcn.dlsym(handle, 'nvrtcGetLoweredName')
{{endif}}
{{if 'nvrtcGetPCHHeapSize' in found_functions}}
global __nvrtcGetPCHHeapSize
__nvrtcGetPCHHeapSize = dlfcn.dlsym(handle, 'nvrtcGetPCHHeapSize')
{{endif}}
{{if 'nvrtcSetPCHHeapSize' in found_functions}}
global __nvrtcSetPCHHeapSize
__nvrtcSetPCHHeapSize = dlfcn.dlsym(handle, 'nvrtcSetPCHHeapSize')
{{endif}}
{{if 'nvrtcGetPCHCreateStatus' in found_functions}}
global __nvrtcGetPCHCreateStatus
__nvrtcGetPCHCreateStatus = dlfcn.dlsym(handle, 'nvrtcGetPCHCreateStatus')
{{endif}}
{{if 'nvrtcGetPCHHeapSizeRequired' in found_functions}}
global __nvrtcGetPCHHeapSizeRequired
__nvrtcGetPCHHeapSizeRequired = dlfcn.dlsym(handle, 'nvrtcGetPCHHeapSizeRequired')
{{endif}}
{{if 'nvrtcSetFlowCallback' in found_functions}}
global __nvrtcSetFlowCallback
__nvrtcSetFlowCallback = dlfcn.dlsym(handle, 'nvrtcSetFlowCallback')
{{endif}}
handle = <void*><uintptr_t>load_nvidia_dynamic_lib("nvrtc")._handle_uint

# Load function
{{if 'nvrtcGetErrorString' in found_functions}}
global __nvrtcGetErrorString
__nvrtcGetErrorString = dlfcn.dlsym(handle, 'nvrtcGetErrorString')
{{endif}}
{{if 'nvrtcVersion' in found_functions}}
global __nvrtcVersion
__nvrtcVersion = dlfcn.dlsym(handle, 'nvrtcVersion')
{{endif}}
{{if 'nvrtcGetNumSupportedArchs' in found_functions}}
global __nvrtcGetNumSupportedArchs
__nvrtcGetNumSupportedArchs = dlfcn.dlsym(handle, 'nvrtcGetNumSupportedArchs')
{{endif}}
{{if 'nvrtcGetSupportedArchs' in found_functions}}
global __nvrtcGetSupportedArchs
__nvrtcGetSupportedArchs = dlfcn.dlsym(handle, 'nvrtcGetSupportedArchs')
{{endif}}
{{if 'nvrtcCreateProgram' in found_functions}}
global __nvrtcCreateProgram
__nvrtcCreateProgram = dlfcn.dlsym(handle, 'nvrtcCreateProgram')
{{endif}}
{{if 'nvrtcDestroyProgram' in found_functions}}
global __nvrtcDestroyProgram
__nvrtcDestroyProgram = dlfcn.dlsym(handle, 'nvrtcDestroyProgram')
{{endif}}
{{if 'nvrtcCompileProgram' in found_functions}}
global __nvrtcCompileProgram
__nvrtcCompileProgram = dlfcn.dlsym(handle, 'nvrtcCompileProgram')
{{endif}}
{{if 'nvrtcGetPTXSize' in found_functions}}
global __nvrtcGetPTXSize
__nvrtcGetPTXSize = dlfcn.dlsym(handle, 'nvrtcGetPTXSize')
{{endif}}
{{if 'nvrtcGetPTX' in found_functions}}
global __nvrtcGetPTX
__nvrtcGetPTX = dlfcn.dlsym(handle, 'nvrtcGetPTX')
{{endif}}
{{if 'nvrtcGetCUBINSize' in found_functions}}
global __nvrtcGetCUBINSize
__nvrtcGetCUBINSize = dlfcn.dlsym(handle, 'nvrtcGetCUBINSize')
{{endif}}
{{if 'nvrtcGetCUBIN' in found_functions}}
global __nvrtcGetCUBIN
__nvrtcGetCUBIN = dlfcn.dlsym(handle, 'nvrtcGetCUBIN')
{{endif}}
{{if 'nvrtcGetLTOIRSize' in found_functions}}
global __nvrtcGetLTOIRSize
__nvrtcGetLTOIRSize = dlfcn.dlsym(handle, 'nvrtcGetLTOIRSize')
{{endif}}
{{if 'nvrtcGetLTOIR' in found_functions}}
global __nvrtcGetLTOIR
__nvrtcGetLTOIR = dlfcn.dlsym(handle, 'nvrtcGetLTOIR')
{{endif}}
{{if 'nvrtcGetOptiXIRSize' in found_functions}}
global __nvrtcGetOptiXIRSize
__nvrtcGetOptiXIRSize = dlfcn.dlsym(handle, 'nvrtcGetOptiXIRSize')
{{endif}}
{{if 'nvrtcGetOptiXIR' in found_functions}}
global __nvrtcGetOptiXIR
__nvrtcGetOptiXIR = dlfcn.dlsym(handle, 'nvrtcGetOptiXIR')
{{endif}}
{{if 'nvrtcGetProgramLogSize' in found_functions}}
global __nvrtcGetProgramLogSize
__nvrtcGetProgramLogSize = dlfcn.dlsym(handle, 'nvrtcGetProgramLogSize')
{{endif}}
{{if 'nvrtcGetProgramLog' in found_functions}}
global __nvrtcGetProgramLog
__nvrtcGetProgramLog = dlfcn.dlsym(handle, 'nvrtcGetProgramLog')
{{endif}}
{{if 'nvrtcAddNameExpression' in found_functions}}
global __nvrtcAddNameExpression
__nvrtcAddNameExpression = dlfcn.dlsym(handle, 'nvrtcAddNameExpression')
{{endif}}
{{if 'nvrtcGetLoweredName' in found_functions}}
global __nvrtcGetLoweredName
__nvrtcGetLoweredName = dlfcn.dlsym(handle, 'nvrtcGetLoweredName')
{{endif}}
{{if 'nvrtcGetPCHHeapSize' in found_functions}}
global __nvrtcGetPCHHeapSize
__nvrtcGetPCHHeapSize = dlfcn.dlsym(handle, 'nvrtcGetPCHHeapSize')
{{endif}}
{{if 'nvrtcSetPCHHeapSize' in found_functions}}
global __nvrtcSetPCHHeapSize
__nvrtcSetPCHHeapSize = dlfcn.dlsym(handle, 'nvrtcSetPCHHeapSize')
{{endif}}
{{if 'nvrtcGetPCHCreateStatus' in found_functions}}
global __nvrtcGetPCHCreateStatus
__nvrtcGetPCHCreateStatus = dlfcn.dlsym(handle, 'nvrtcGetPCHCreateStatus')
{{endif}}
{{if 'nvrtcGetPCHHeapSizeRequired' in found_functions}}
global __nvrtcGetPCHHeapSizeRequired
__nvrtcGetPCHHeapSizeRequired = dlfcn.dlsym(handle, 'nvrtcGetPCHHeapSizeRequired')
{{endif}}
{{if 'nvrtcSetFlowCallback' in found_functions}}
global __nvrtcSetFlowCallback
__nvrtcSetFlowCallback = dlfcn.dlsym(handle, 'nvrtcSetFlowCallback')
{{endif}}
{{endif}}

__cuPythonInit = True
return 0

{{if 'nvrtcGetErrorString' in found_functions}}

cdef const char* _nvrtcGetErrorString(nvrtcResult result) except ?NULL nogil:
Expand Down
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