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Use an event name that contains the process id

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This reduces the risk for namespace collisions if two processes
run the encoder simultaneously without address space layout
randomization.
This commit is contained in:
Martin Storsjö 2014-03-02 23:23:56 +02:00
parent 4814d5828d
commit d4bdef2916
2 changed files with 21 additions and 12 deletions
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1
codec/encoder/core/inc/mt_defs.h
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@ -91,6 +91,7 @@ int32_t iEndMbIndex; // exclusive
typedef struct TagSliceThreading {
SSliceThreadPrivateData* pThreadPEncCtx;// thread context, [iThreadIdx]
char eventNamespace[100];
WELS_THREAD_HANDLE pThreadHandles[MAX_THREADS_NUM];// thread handles, [iThreadIdx]
WELS_EVENT pSliceCodedEvent[MAX_THREADS_NUM];// events for slice coded state, [iThreadIdx]
WELS_EVENT pReadySliceCodingEvent[MAX_THREADS_NUM]; // events for slice coding ready, [iThreadIdx]

32
codec/encoder/core/src/slice_multi_threading.cpp
View File

@ -43,6 +43,7 @@
#include <assert.h>
#if !defined(_WIN32)
#include <semaphore.h>
#include <unistd.h>
#endif//!_WIN32
#ifndef SEM_NAME_MAX
// length of semaphore name should be system constrained at least on mac 10.7
@ -317,6 +318,13 @@ int32_t RequestMtResource (sWelsEncCtx** ppCtx, SWelsSvcCodingParam* pCodingPara
"pThreadPEncCtx");
WELS_VERIFY_RETURN_PROC_IF (1, (NULL == pSmt->pThreadPEncCtx), FreeMemorySvc (ppCtx))
#ifdef _WIN32
// Dummy event namespace, the windows events don't actually use this
WelsSnprintf (pSmt->eventNamespace, sizeof(pSmt->eventNamespace), "%p", (void*) (*ppCtx));
#else
WelsSnprintf (pSmt->eventNamespace, sizeof(pSmt->eventNamespace), "%p%x", (void*) (*ppCtx), getpid());
#endif//!_WIN32
iIdx = 0;
while (iIdx < iNumSpatialLayers) {
SSliceConfig* pMso = &pPara->sDependencyLayers[iIdx].sSliceCfg;
@ -360,34 +368,34 @@ int32_t RequestMtResource (sWelsEncCtx** ppCtx, SWelsSvcCodingParam* pCodingPara
pSmt->pThreadHandles[iIdx] = 0;
#ifdef _WIN32
WelsSnprintf (name, SEM_NAME_MAX, "fs%d%p", iIdx, (void*) (*ppCtx));
WelsSnprintf (name, SEM_NAME_MAX, "fs%d%s", iIdx, pSmt->eventNamespace);
err = WelsEventOpen (&pSmt->pFinSliceCodingEvent[iIdx], name);
#if defined(ENABLE_TRACE_MT)
WelsLog ((*ppCtx), WELS_LOG_INFO, "[MT] Open pFinSliceCodingEvent%d named(%s) ret%d err%d\n", iIdx, name, err, errno);
#endif
WelsSnprintf (name, SEM_NAME_MAX, "ee%d%p", iIdx, (void*) (*ppCtx));
WelsSnprintf (name, SEM_NAME_MAX, "ee%d%s", iIdx, pSmt->eventNamespace);
err = WelsEventOpen (&pSmt->pExitEncodeEvent[iIdx], name);
#if defined(ENABLE_TRACE_MT)
WelsLog ((*ppCtx), WELS_LOG_INFO, "[MT] Open pExitEncodeEvent%d named(%s) ret%d err%d\n", iIdx, name, err, errno);
#endif
#endif//_WIN32
// length of semaphore name should be system constrained at least on mac 10.7
WelsSnprintf (name, SEM_NAME_MAX, "ud%d%p", iIdx, (void*) (*ppCtx));
WelsSnprintf (name, SEM_NAME_MAX, "ud%d%s", iIdx, pSmt->eventNamespace);
err = WelsEventOpen (&pSmt->pUpdateMbListEvent[iIdx], name);
#if defined(ENABLE_TRACE_MT)
WelsLog ((*ppCtx), WELS_LOG_INFO, "[MT] Open pUpdateMbListEvent%d named(%s) ret%d err%d\n", iIdx, name, err, errno);
#endif
WelsSnprintf (name, SEM_NAME_MAX, "fu%d%p", iIdx, (void*) (*ppCtx));
WelsSnprintf (name, SEM_NAME_MAX, "fu%d%s", iIdx, pSmt->eventNamespace);
err = WelsEventOpen (&pSmt->pFinUpdateMbListEvent[iIdx], name);
#if defined(ENABLE_TRACE_MT)
WelsLog ((*ppCtx), WELS_LOG_INFO, "[MT] Open pFinUpdateMbListEvent%d named(%s) ret%d err%d\n", iIdx, name, err, errno);
#endif
WelsSnprintf (name, SEM_NAME_MAX, "sc%d%p", iIdx, (void*) (*ppCtx));
WelsSnprintf (name, SEM_NAME_MAX, "sc%d%s", iIdx, pSmt->eventNamespace);
err = WelsEventOpen (&pSmt->pSliceCodedEvent[iIdx], name);
#if defined(ENABLE_TRACE_MT)
WelsLog ((*ppCtx), WELS_LOG_INFO, "[MT] Open pSliceCodedEvent%d named(%s) ret%d err%d\n", iIdx, name, err, errno);
#endif
WelsSnprintf (name, SEM_NAME_MAX, "rc%d%p", iIdx, (void*) (*ppCtx));
WelsSnprintf (name, SEM_NAME_MAX, "rc%d%s", iIdx, pSmt->eventNamespace);
err = WelsEventOpen (&pSmt->pReadySliceCodingEvent[iIdx], name);
#if defined(ENABLE_TRACE_MT)
WelsLog ((*ppCtx), WELS_LOG_INFO, "[MT] Open pReadySliceCodingEvent%d = 0x%p named(%s) ret%d err%d\n", iIdx,
@ -464,18 +472,18 @@ void ReleaseMtResource (sWelsEncCtx** ppCtx) {
if (pSmt->pThreadHandles != NULL && pSmt->pThreadHandles[iIdx] != NULL)
WelsThreadDestroy (&pSmt->pThreadHandles[iIdx]);
WelsSnprintf (ename, SEM_NAME_MAX, "fs%d%p", iIdx, (void*) (*ppCtx));
WelsSnprintf (ename, SEM_NAME_MAX, "fs%d%s", iIdx, pSmt->eventNamespace);
WelsEventClose (&pSmt->pFinSliceCodingEvent[iIdx], ename);
WelsSnprintf (ename, SEM_NAME_MAX, "ee%d%p", iIdx, (void*) (*ppCtx));
WelsSnprintf (ename, SEM_NAME_MAX, "ee%d%s", iIdx, pSmt->eventNamespace);
WelsEventClose (&pSmt->pExitEncodeEvent[iIdx], ename);
#endif//_WIN32
WelsSnprintf (ename, SEM_NAME_MAX, "sc%d%p", iIdx, (void*) (*ppCtx));
WelsSnprintf (ename, SEM_NAME_MAX, "sc%d%s", iIdx, pSmt->eventNamespace);
WelsEventClose (&pSmt->pSliceCodedEvent[iIdx], ename);
WelsSnprintf (ename, SEM_NAME_MAX, "rc%d%p", iIdx, (void*) (*ppCtx));
WelsSnprintf (ename, SEM_NAME_MAX, "rc%d%s", iIdx, pSmt->eventNamespace);
WelsEventClose (&pSmt->pReadySliceCodingEvent[iIdx], ename);
WelsSnprintf (ename, SEM_NAME_MAX, "ud%d%p", iIdx, (void*) (*ppCtx));
WelsSnprintf (ename, SEM_NAME_MAX, "ud%d%s", iIdx, pSmt->eventNamespace);
WelsEventClose (&pSmt->pUpdateMbListEvent[iIdx], ename);
WelsSnprintf (ename, SEM_NAME_MAX, "fu%d%p", iIdx, (void*) (*ppCtx));
WelsSnprintf (ename, SEM_NAME_MAX, "fu%d%s", iIdx, pSmt->eventNamespace);
WelsEventClose (&pSmt->pFinUpdateMbListEvent[iIdx], ename);
++ iIdx;