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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
481 lines
15 KiB
C
481 lines
15 KiB
C
/*===-- jitprofiling.c - JIT (Just-In-Time) Profiling API----------*- C -*-===*
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*
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* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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* See https://llvm.org/LICENSE.txt for license information.
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* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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*
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*===----------------------------------------------------------------------===*
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*
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* This file provides Intel(R) Performance Analyzer JIT (Just-In-Time)
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* Profiling API implementation.
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*
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* NOTE: This file comes in a style different from the rest of LLVM
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* source base since this is a piece of code shared from Intel(R)
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* products. Please do not reformat / re-style this code to make
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* subsequent merges and contributions from the original source base eaiser.
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*
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*===----------------------------------------------------------------------===*/
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#include "ittnotify_config.h"
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#if ITT_PLATFORM==ITT_PLATFORM_WIN
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#include <windows.h>
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#pragma optimize("", off)
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#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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#include <dlfcn.h>
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#include <pthread.h>
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#include <stdint.h>
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#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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#include <stdlib.h>
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#include "jitprofiling.h"
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static const char rcsid[] = "\n@(#) $Revision: 243501 $\n";
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#define DLL_ENVIRONMENT_VAR "VS_PROFILER"
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#ifndef NEW_DLL_ENVIRONMENT_VAR
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#if ITT_ARCH==ITT_ARCH_IA32
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#define NEW_DLL_ENVIRONMENT_VAR "INTEL_JIT_PROFILER32"
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#else
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#define NEW_DLL_ENVIRONMENT_VAR "INTEL_JIT_PROFILER64"
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#endif
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#endif /* NEW_DLL_ENVIRONMENT_VAR */
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#if ITT_PLATFORM==ITT_PLATFORM_WIN
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#define DEFAULT_DLLNAME "JitPI.dll"
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HINSTANCE m_libHandle = NULL;
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#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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#define DEFAULT_DLLNAME "libJitPI.so"
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void* m_libHandle = NULL;
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#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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/* default location of JIT profiling agent on Android */
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#define ANDROID_JIT_AGENT_PATH "/data/intel/libittnotify.so"
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/* the function pointers */
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typedef unsigned int(*TPInitialize)(void);
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static TPInitialize FUNC_Initialize=NULL;
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typedef unsigned int(*TPNotify)(unsigned int, void*);
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static TPNotify FUNC_NotifyEvent=NULL;
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static iJIT_IsProfilingActiveFlags executionMode = iJIT_NOTHING_RUNNING;
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/* end collector dll part. */
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/* loadiJIT_Funcs() : this function is called just in the beginning
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* and is responsible to load the functions from BistroJavaCollector.dll
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* result:
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* on success: the functions loads, iJIT_DLL_is_missing=0, return value = 1
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* on failure: the functions are NULL, iJIT_DLL_is_missing=1, return value = 0
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*/
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static int loadiJIT_Funcs(void);
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/* global representing whether the BistroJavaCollector can't be loaded */
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static int iJIT_DLL_is_missing = 0;
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/* Virtual stack - the struct is used as a virtual stack for each thread.
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* Every thread initializes with a stack of size INIT_TOP_STACK.
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* Every method entry decreases from the current stack point,
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* and when a thread stack reaches its top of stack (return from the global
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* function), the top of stack and the current stack increase. Notice that
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* when returning from a function the stack pointer is the address of
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* the function return.
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*/
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#if ITT_PLATFORM==ITT_PLATFORM_WIN
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static DWORD threadLocalStorageHandle = 0;
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#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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static pthread_key_t threadLocalStorageHandle = (pthread_key_t)0;
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#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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#define INIT_TOP_Stack 10000
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typedef struct
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{
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unsigned int TopStack;
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unsigned int CurrentStack;
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} ThreadStack, *pThreadStack;
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/* end of virtual stack. */
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/*
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* The function for reporting virtual-machine related events to VTune.
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* Note: when reporting iJVM_EVENT_TYPE_ENTER_NIDS, there is no need to fill
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* in the stack_id field in the iJIT_Method_NIDS structure, as VTune fills it.
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* The return value in iJVM_EVENT_TYPE_ENTER_NIDS &&
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* iJVM_EVENT_TYPE_LEAVE_NIDS events will be 0 in case of failure.
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* in iJVM_EVENT_TYPE_METHOD_LOAD_FINISHED event
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* it will be -1 if EventSpecificData == 0 otherwise it will be 0.
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*/
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ITT_EXTERN_C int JITAPI
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iJIT_NotifyEvent(iJIT_JVM_EVENT event_type, void *EventSpecificData)
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{
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int ReturnValue;
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/*
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* This section is for debugging outside of VTune.
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* It creates the environment variables that indicates call graph mode.
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* If running outside of VTune remove the remark.
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*
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*
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* static int firstTime = 1;
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* char DoCallGraph[12] = "DoCallGraph";
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* if (firstTime)
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* {
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* firstTime = 0;
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* SetEnvironmentVariable( "BISTRO_COLLECTORS_DO_CALLGRAPH", DoCallGraph);
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* }
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*
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* end of section.
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*/
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/* initialization part - the functions have not been loaded yet. This part
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* will load the functions, and check if we are in Call Graph mode.
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* (for special treatment).
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*/
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if (!FUNC_NotifyEvent)
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{
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if (iJIT_DLL_is_missing)
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return 0;
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/* load the Function from the DLL */
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if (!loadiJIT_Funcs())
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return 0;
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/* Call Graph initialization. */
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}
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/* If the event is method entry/exit, check that in the current mode
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* VTune is allowed to receive it
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*/
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if ((event_type == iJVM_EVENT_TYPE_ENTER_NIDS ||
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event_type == iJVM_EVENT_TYPE_LEAVE_NIDS) &&
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(executionMode != iJIT_CALLGRAPH_ON))
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{
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return 0;
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}
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/* This section is performed when method enter event occurs.
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* It updates the virtual stack, or creates it if this is the first
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* method entry in the thread. The stack pointer is decreased.
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*/
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if (event_type == iJVM_EVENT_TYPE_ENTER_NIDS)
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{
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#if ITT_PLATFORM==ITT_PLATFORM_WIN
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pThreadStack threadStack =
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(pThreadStack)TlsGetValue (threadLocalStorageHandle);
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#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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pThreadStack threadStack =
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(pThreadStack)pthread_getspecific(threadLocalStorageHandle);
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#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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/* check for use of reserved method IDs */
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if ( ((piJIT_Method_NIDS) EventSpecificData)->method_id <= 999 )
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return 0;
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if (!threadStack)
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{
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/* initialize the stack. */
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threadStack = (pThreadStack) calloc (sizeof(ThreadStack), 1);
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threadStack->TopStack = INIT_TOP_Stack;
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threadStack->CurrentStack = INIT_TOP_Stack;
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#if ITT_PLATFORM==ITT_PLATFORM_WIN
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TlsSetValue(threadLocalStorageHandle,(void*)threadStack);
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#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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pthread_setspecific(threadLocalStorageHandle,(void*)threadStack);
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#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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}
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/* decrease the stack. */
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((piJIT_Method_NIDS) EventSpecificData)->stack_id =
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(threadStack->CurrentStack)--;
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}
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/* This section is performed when method leave event occurs
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* It updates the virtual stack.
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* Increases the stack pointer.
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* If the stack pointer reached the top (left the global function)
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* increase the pointer and the top pointer.
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*/
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if (event_type == iJVM_EVENT_TYPE_LEAVE_NIDS)
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{
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#if ITT_PLATFORM==ITT_PLATFORM_WIN
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pThreadStack threadStack =
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(pThreadStack)TlsGetValue (threadLocalStorageHandle);
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#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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pThreadStack threadStack =
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(pThreadStack)pthread_getspecific(threadLocalStorageHandle);
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#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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/* check for use of reserved method IDs */
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if ( ((piJIT_Method_NIDS) EventSpecificData)->method_id <= 999 )
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return 0;
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if (!threadStack)
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{
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/* Error: first report in this thread is method exit */
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exit (1);
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}
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((piJIT_Method_NIDS) EventSpecificData)->stack_id =
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++(threadStack->CurrentStack) + 1;
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if (((piJIT_Method_NIDS) EventSpecificData)->stack_id
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> threadStack->TopStack)
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((piJIT_Method_NIDS) EventSpecificData)->stack_id =
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(unsigned int)-1;
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}
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if (event_type == iJVM_EVENT_TYPE_METHOD_LOAD_FINISHED)
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{
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/* check for use of reserved method IDs */
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if ( ((piJIT_Method_Load) EventSpecificData)->method_id <= 999 )
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return 0;
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}
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ReturnValue = (int)FUNC_NotifyEvent(event_type, EventSpecificData);
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return ReturnValue;
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}
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/* The new mode call back routine */
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ITT_EXTERN_C void JITAPI
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iJIT_RegisterCallbackEx(void *userdata, iJIT_ModeChangedEx
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NewModeCallBackFuncEx)
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{
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/* is it already missing... or the load of functions from the DLL failed */
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if (iJIT_DLL_is_missing || !loadiJIT_Funcs())
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{
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/* then do not bother with notifications */
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NewModeCallBackFuncEx(userdata, iJIT_NO_NOTIFICATIONS);
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/* Error: could not load JIT functions. */
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return;
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}
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/* nothing to do with the callback */
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}
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/*
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* This function allows the user to query in which mode, if at all,
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*VTune is running
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*/
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ITT_EXTERN_C iJIT_IsProfilingActiveFlags JITAPI iJIT_IsProfilingActive()
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{
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if (!iJIT_DLL_is_missing)
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{
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loadiJIT_Funcs();
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}
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return executionMode;
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}
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/* this function loads the collector dll (BistroJavaCollector)
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* and the relevant functions.
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* on success: all functions load, iJIT_DLL_is_missing = 0, return value = 1
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* on failure: all functions are NULL, iJIT_DLL_is_missing = 1, return value = 0
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*/
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static int loadiJIT_Funcs()
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{
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static int bDllWasLoaded = 0;
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char *dllName = (char*)rcsid; /* !! Just to avoid unused code elimination */
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#if ITT_PLATFORM==ITT_PLATFORM_WIN
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DWORD dNameLength = 0;
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#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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if(bDllWasLoaded)
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{
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/* dll was already loaded, no need to do it for the second time */
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return 1;
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}
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/* Assumes that the DLL will not be found */
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iJIT_DLL_is_missing = 1;
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FUNC_NotifyEvent = NULL;
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if (m_libHandle)
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{
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#if ITT_PLATFORM==ITT_PLATFORM_WIN
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FreeLibrary(m_libHandle);
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#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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dlclose(m_libHandle);
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#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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m_libHandle = NULL;
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}
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/* Try to get the dll name from the environment */
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#if ITT_PLATFORM==ITT_PLATFORM_WIN
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dNameLength = GetEnvironmentVariableA(NEW_DLL_ENVIRONMENT_VAR, NULL, 0);
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if (dNameLength)
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{
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DWORD envret = 0;
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dllName = (char*)malloc(sizeof(char) * (dNameLength + 1));
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envret = GetEnvironmentVariableA(NEW_DLL_ENVIRONMENT_VAR,
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dllName, dNameLength);
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if (envret)
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{
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/* Try to load the dll from the PATH... */
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m_libHandle = LoadLibraryExA(dllName,
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NULL, LOAD_WITH_ALTERED_SEARCH_PATH);
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}
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free(dllName);
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} else {
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/* Try to use old VS_PROFILER variable */
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dNameLength = GetEnvironmentVariableA(DLL_ENVIRONMENT_VAR, NULL, 0);
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if (dNameLength)
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{
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DWORD envret = 0;
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dllName = (char*)malloc(sizeof(char) * (dNameLength + 1));
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envret = GetEnvironmentVariableA(DLL_ENVIRONMENT_VAR,
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dllName, dNameLength);
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if (envret)
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{
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/* Try to load the dll from the PATH... */
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m_libHandle = LoadLibraryA(dllName);
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}
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free(dllName);
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}
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}
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#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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dllName = getenv(NEW_DLL_ENVIRONMENT_VAR);
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if (!dllName)
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dllName = getenv(DLL_ENVIRONMENT_VAR);
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#ifdef ANDROID
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if (!dllName)
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dllName = ANDROID_JIT_AGENT_PATH;
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#endif
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if (dllName)
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{
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/* Try to load the dll from the PATH... */
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m_libHandle = dlopen(dllName, RTLD_LAZY);
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}
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#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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if (!m_libHandle)
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{
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#if ITT_PLATFORM==ITT_PLATFORM_WIN
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m_libHandle = LoadLibraryA(DEFAULT_DLLNAME);
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#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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m_libHandle = dlopen(DEFAULT_DLLNAME, RTLD_LAZY);
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#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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}
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/* if the dll wasn't loaded - exit. */
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if (!m_libHandle)
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{
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iJIT_DLL_is_missing = 1; /* don't try to initialize
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* JIT agent the second time
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*/
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return 0;
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}
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#if ITT_PLATFORM==ITT_PLATFORM_WIN
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FUNC_NotifyEvent = (TPNotify)GetProcAddress(m_libHandle, "NotifyEvent");
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#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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FUNC_NotifyEvent = (TPNotify)(intptr_t)dlsym(m_libHandle, "NotifyEvent");
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#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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if (!FUNC_NotifyEvent)
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{
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FUNC_Initialize = NULL;
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return 0;
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}
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#if ITT_PLATFORM==ITT_PLATFORM_WIN
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FUNC_Initialize = (TPInitialize)GetProcAddress(m_libHandle, "Initialize");
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#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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FUNC_Initialize = (TPInitialize)(intptr_t)dlsym(m_libHandle, "Initialize");
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#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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if (!FUNC_Initialize)
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{
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FUNC_NotifyEvent = NULL;
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return 0;
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}
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executionMode = (iJIT_IsProfilingActiveFlags)FUNC_Initialize();
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bDllWasLoaded = 1;
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iJIT_DLL_is_missing = 0; /* DLL is ok. */
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/*
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* Call Graph mode: init the thread local storage
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* (need to store the virtual stack there).
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*/
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if ( executionMode == iJIT_CALLGRAPH_ON )
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{
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/* Allocate a thread local storage slot for the thread "stack" */
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if (!threadLocalStorageHandle)
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#if ITT_PLATFORM==ITT_PLATFORM_WIN
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threadLocalStorageHandle = TlsAlloc();
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#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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pthread_key_create(&threadLocalStorageHandle, NULL);
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#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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}
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return 1;
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}
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/*
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* This function should be called by the user whenever a thread ends,
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* to free the thread "virtual stack" storage
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*/
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ITT_EXTERN_C void JITAPI FinalizeThread()
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{
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if (threadLocalStorageHandle)
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{
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#if ITT_PLATFORM==ITT_PLATFORM_WIN
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pThreadStack threadStack =
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(pThreadStack)TlsGetValue (threadLocalStorageHandle);
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#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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pThreadStack threadStack =
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(pThreadStack)pthread_getspecific(threadLocalStorageHandle);
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#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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if (threadStack)
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{
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free (threadStack);
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threadStack = NULL;
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#if ITT_PLATFORM==ITT_PLATFORM_WIN
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TlsSetValue (threadLocalStorageHandle, threadStack);
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#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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pthread_setspecific(threadLocalStorageHandle, threadStack);
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#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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}
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}
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}
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/*
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* This function should be called by the user when the process ends,
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* to free the local storage index
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*/
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ITT_EXTERN_C void JITAPI FinalizeProcess()
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{
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if (m_libHandle)
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{
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#if ITT_PLATFORM==ITT_PLATFORM_WIN
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FreeLibrary(m_libHandle);
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#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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dlclose(m_libHandle);
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#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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m_libHandle = NULL;
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}
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if (threadLocalStorageHandle)
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#if ITT_PLATFORM==ITT_PLATFORM_WIN
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TlsFree (threadLocalStorageHandle);
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#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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pthread_key_delete(threadLocalStorageHandle);
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#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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}
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/*
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* This function should be called by the user for any method once.
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* The function will return a unique method ID, the user should maintain
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* the ID for each method
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*/
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ITT_EXTERN_C unsigned int JITAPI iJIT_GetNewMethodID()
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{
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static unsigned int methodID = 0x100000;
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if (methodID == 0)
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return 0; /* ERROR : this is not a valid value */
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return methodID++;
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}
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