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Implement a new module command that is called right before cosing the virtual machine to allow modules to release resources manually.

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Should fix a possible crash in the IRC plugin which was caused by the Session destructor to be called recursively when cleaned automatically by the VM.
This commit is contained in:
Sandu Liviu Catalin 2016-09-02 14:11:39 +03:00
parent e23e5d0a05
commit e445530bbb
11 changed files with 104 additions and 2 deletions
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15
modules/irc/Module.cpp
View File

@ -99,6 +99,15 @@ static void OnSquirrelTerminate()
NullFunction().ReleaseGently();
}
/* ------------------------------------------------------------------------------------------------
* The virtual machined is about to be closed. Last chance to release anything manually.
*/
static void OnSquirrelClosing()
{
// Terminate all sessions, if any
SessionTerminate();
}
/* ------------------------------------------------------------------------------------------------
* The virtual machined was closed and all memory associated with it was released.
*/
@ -106,8 +115,6 @@ static void OnSquirrelReleased()
{
// Release the current virtual machine, if any
DefaultVM::Set(nullptr);
// Terminate all sessions, if any
SessionTerminate();
}
/* ------------------------------------------------------------------------------------------------
@ -141,6 +148,10 @@ static uint8_t OnPluginCommand(uint32_t command_identifier, CCStr message)
{
OnSquirrelTerminate();
} break;
case SQMOD_CLOSING_CMD:
{
OnSquirrelClosing();
} break;
case SQMOD_RELEASED_CMD:
{
OnSquirrelReleased();

2
modules/irc/Session.cpp
View File

@ -202,7 +202,9 @@ void Session::Destroy()
{
// Make sure there's even a session to release
if (!m_Session)
{
return;
}
// Disconnect the session
Disconnect();
// Break the association with this instance (paranoia)

12
modules/json/Module.cpp
View File

@ -102,6 +102,14 @@ static void OnSquirrelTerminate()
NullFunction().ReleaseGently();
}
/* ------------------------------------------------------------------------------------------------
* The virtual machined is about to be closed. Last chance to release anything manually.
*/
static void OnSquirrelClosing()
{
// Nothing to release manually...
}
/* ------------------------------------------------------------------------------------------------
* The virtual machined was closed and all memory associated with it was released.
*/
@ -142,6 +150,10 @@ static uint8_t OnPluginCommand(uint32_t command_identifier, CCStr message)
{
OnSquirrelTerminate();
} break;
case SQMOD_CLOSING_CMD:
{
OnSquirrelClosing();
} break;
case SQMOD_RELEASED_CMD:
{
OnSquirrelReleased();

12
modules/mg/Module.cpp
View File

@ -186,6 +186,14 @@ static void OnSquirrelTerminate()
// Release script resources...
}
/* ------------------------------------------------------------------------------------------------
* The virtual machined is about to be closed. Last chance to release anything manually.
*/
static void OnSquirrelClosing()
{
// Nothing to release manually...
}
/* ------------------------------------------------------------------------------------------------
* The virtual machined was closed and all memory associated with it was released.
*/
@ -226,6 +234,10 @@ static uint8_t OnPluginCommand(uint32_t command_identifier, CCStr message)
{
OnSquirrelTerminate();
} break;
case SQMOD_CLOSING_CMD:
{
OnSquirrelClosing();
} break;
case SQMOD_RELEASED_CMD:
{
OnSquirrelReleased();

12
modules/mmdb/Module.cpp
View File

@ -78,6 +78,14 @@ static void OnSquirrelTerminate()
// Release script resources...
}
/* ------------------------------------------------------------------------------------------------
* The virtual machined is about to be closed. Last chance to release anything manually.
*/
static void OnSquirrelClosing()
{
// Nothing to release manually...
}
/* ------------------------------------------------------------------------------------------------
* The virtual machined was closed and all memory associated with it was released.
*/
@ -118,6 +126,10 @@ static uint8_t OnPluginCommand(uint32_t command_identifier, CCStr message)
{
OnSquirrelTerminate();
} break;
case SQMOD_CLOSING_CMD:
{
OnSquirrelClosing();
} break;
case SQMOD_RELEASED_CMD:
{
OnSquirrelReleased();

12
modules/mysql/Module.cpp
View File

@ -95,6 +95,14 @@ static void OnSquirrelTerminate()
// Release script resources...
}
/* ------------------------------------------------------------------------------------------------
* The virtual machined is about to be closed. Last chance to release anything manually.
*/
static void OnSquirrelClosing()
{
// Nothing to release manually...
}
/* ------------------------------------------------------------------------------------------------
* The virtual machined was closed and all memory associated with it was released.
*/
@ -135,6 +143,10 @@ static uint8_t OnPluginCommand(uint32_t command_identifier, CCStr message)
{
OnSquirrelTerminate();
} break;
case SQMOD_CLOSING_CMD:
{
OnSquirrelClosing();
} break;
case SQMOD_RELEASED_CMD:
{
OnSquirrelReleased();

12
modules/sample/Module.cpp
View File

@ -89,6 +89,14 @@ static void OnSquirrelTerminate()
// Release script resources...
}
/* ------------------------------------------------------------------------------------------------
* The virtual machined is about to be closed. Last chance to release anything manually.
*/
static void OnSquirrelClosing()
{
// Nothing to release manually...
}
/* ------------------------------------------------------------------------------------------------
* The virtual machined was closed and all memory associated with it was released.
*/
@ -129,6 +137,10 @@ static uint8_t OnPluginCommand(uint32_t command_identifier, CCStr message)
{
OnSquirrelTerminate();
} break;
case SQMOD_CLOSING_CMD:
{
OnSquirrelClosing();
} break;
case SQMOD_RELEASED_CMD:
{
OnSquirrelReleased();

12
modules/sqlite/Module.cpp
View File

@ -99,6 +99,14 @@ static void OnSquirrelTerminate()
// Release script resources...
}
/* ------------------------------------------------------------------------------------------------
* The virtual machined is about to be closed. Last chance to release anything manually.
*/
static void OnSquirrelClosing()
{
// Nothing to release manually...
}
/* ------------------------------------------------------------------------------------------------
* The virtual machined was closed and all memory associated with it was released.
*/
@ -139,6 +147,10 @@ static uint8_t OnPluginCommand(uint32_t command_identifier, CCStr message)
{
OnSquirrelTerminate();
} break;
case SQMOD_CLOSING_CMD:
{
OnSquirrelClosing();
} break;
case SQMOD_RELEASED_CMD:
{
OnSquirrelReleased();

12
modules/xml/Module.cpp
View File

@ -377,6 +377,14 @@ static void OnSquirrelTerminate()
// Release script resources...
}
/* ------------------------------------------------------------------------------------------------
* The virtual machined is about to be closed. Last chance to release anything manually.
*/
static void OnSquirrelClosing()
{
// Nothing to release manually...
}
/* ------------------------------------------------------------------------------------------------
* The virtual machined was closed and all memory associated with it was released.
*/
@ -417,6 +425,10 @@ static uint8_t OnPluginCommand(uint32_t command_identifier, CCStr message)
{
OnSquirrelTerminate();
} break;
case SQMOD_CLOSING_CMD:
{
OnSquirrelClosing();
} break;
case SQMOD_RELEASED_CMD:
{
OnSquirrelReleased();

1
shared/SqMod.h
View File

@ -58,6 +58,7 @@ extern "C" {
#define SQMOD_INITIALIZE_CMD 0xDABBAD00
#define SQMOD_LOAD_CMD 0xDEADBABE
#define SQMOD_TERMINATE_CMD 0xDEADC0DE
#define SQMOD_CLOSING_CMD 0xBAAAAAAD
#define SQMOD_RELEASED_CMD 0xDEADBEAF
#define SQMOD_API_VER 1

4
source/Core.cpp
View File

@ -513,6 +513,10 @@ void Core::Terminate(bool shutdown)
// Assertions during close may cause double delete/close!
HSQUIRRELVM sq_vm = m_VM;
m_VM = nullptr;
cLogDbg(m_Verbosity >= 1, "Signaling outside plug-ins the virtual machine is closing");
// Tell modules to do their monkey business
_Func->SendPluginCommand(SQMOD_CLOSING_CMD, "");
// Attempt to close the VM
sq_close(sq_vm);