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Cache: Ensure no C++ exceptions can escape

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This commit is contained in:
Johan Wikman
2016-11-24 22:01:24 +02:00
parent 14c8a5bb5f
commit f8f0ef8d34
2 changed files with 25 additions and 9 deletions
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2
server/modules/filter/cache/cache.h vendored
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@ -26,7 +26,7 @@ class Cache
public:
~Cache();
static Cache* Create(const char* zName, char** pzOptions, FILTER_PARAMETER** ppParms);
static Cache* Create(const char* zName, char** pzOptions, FILTER_PARAMETER** ppParams);
/**
* Returns whether the results of a particular query should be stored.

32
server/modules/filter/cache/cachefilter.cc vendored
View File

@ -12,6 +12,8 @@
*/
#define MXS_MODULE_NAME "cache"
#include "cachefilter.h"
#include <exception>
#include <maxscale/filter.h>
#include "cache.h"
#include "sessioncache.h"
@ -29,6 +31,11 @@ static int clientReply(FILTER* pInstance, void* pSessionData, GWBUF* pPacke
static void diagnostics(FILTER* pInstance, void* pSessionData, DCB* pDcb);
static uint64_t getCapabilities(void);
#define CPP_GUARD(statement)\
do { try { statement; } \
catch (const std::exception& x) { MXS_ERROR("Caught standard exception: %s", x.what()); }\
catch (...) { MXS_ERROR("Caught unknown exception."); } } while (false)
//
// Global symbols of the Module
//
@ -95,7 +102,8 @@ extern "C" FILTER_OBJECT *GetModuleObject()
*/
static FILTER *createInstance(const char* zName, char** pzOptions, FILTER_PARAMETER** ppParams)
{
Cache* pCache = Cache::Create(zName, pzOptions, ppParams);
Cache* pCache = NULL;
CPP_GUARD(pCache = Cache::Create(zName, pzOptions, ppParams));
return reinterpret_cast<FILTER*>(pCache);
}
@ -111,7 +119,9 @@ static FILTER *createInstance(const char* zName, char** pzOptions, FILTER_PARAME
static void *newSession(FILTER* pInstance, SESSION* pSession)
{
Cache* pCache = reinterpret_cast<Cache*>(pInstance);
SessionCache* pSessionCache = SessionCache::Create(pCache, pSession);
SessionCache* pSessionCache = NULL;
CPP_GUARD(pSessionCache = SessionCache::Create(pCache, pSession));
return pSessionCache;
}
@ -126,7 +136,7 @@ static void closeSession(FILTER* pInstance, void* pSessionData)
{
SessionCache* pSessionCache = static_cast<SessionCache*>(pSessionData);
pSessionCache->close();
CPP_GUARD(pSessionCache->close());
}
/**
@ -153,7 +163,7 @@ static void setDownstream(FILTER* pInstance, void* pSessionData, DOWNSTREAM* pDo
{
SessionCache* pSessionCache = static_cast<SessionCache*>(pSessionData);
pSessionCache->setDownstream(pDownstream);
CPP_GUARD(pSessionCache->setDownstream(pDownstream));
}
/**
@ -167,7 +177,7 @@ static void setUpstream(FILTER* pInstance, void* pSessionData, UPSTREAM* pUpstre
{
SessionCache* pSessionCache = static_cast<SessionCache*>(pSessionData);
pSessionCache->setUpstream(pUpstream);
CPP_GUARD(pSessionCache->setUpstream(pUpstream));
}
/**
@ -181,7 +191,10 @@ static int routeQuery(FILTER* pInstance, void* pSessionData, GWBUF* pPacket)
{
SessionCache* pSessionCache = static_cast<SessionCache*>(pSessionData);
return pSessionCache->routeQuery(pPacket);
int rv = 0;
CPP_GUARD(rv = pSessionCache->routeQuery(pPacket));
return rv;
}
/**
@ -195,7 +208,10 @@ static int clientReply(FILTER* pInstance, void* pSessionData, GWBUF* pPacket)
{
SessionCache* pSessionCache = static_cast<SessionCache*>(pSessionData);
return pSessionCache->clientReply(pPacket);
int rv = 0;
CPP_GUARD(rv = pSessionCache->clientReply(pPacket));
return rv;
}
/**
@ -212,7 +228,7 @@ static void diagnostics(FILTER* pInstance, void* pSessionData, DCB* pDcb)
{
SessionCache* pSessionCache = static_cast<SessionCache*>(pSessionData);
pSessionCache->diagnostics(pDcb);
CPP_GUARD(pSessionCache->diagnostics(pDcb));
}