483 lines
15 KiB
C
483 lines
15 KiB
C
/*===-- jitprofiling.c - JIT (Just-In-Time) Profiling API----------*- C -*-===*
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*
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* The LLVM Compiler Infrastructure
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*
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* This file is distributed under the University of Illinois Open Source
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* License. See LICENSE.TXT for details.
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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 <pthread.h>
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#include <dlfcn.h>
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#include <stdint.h>
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#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
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#include <malloc.h>
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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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