881 lines
18 KiB
C++
881 lines
18 KiB
C++
/**
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* vim: set ts=4 :
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* =============================================================================
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* SourcePawn
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* Copyright (C) 2004-2008 AlliedModders LLC. All rights reserved.
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* =============================================================================
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*
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* This program is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License, version 3.0, as published by the
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* Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* As a special exception, AlliedModders LLC gives you permission to link the
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* code of this program (as well as its derivative works) to "Half-Life 2," the
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* "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software
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* by the Valve Corporation. You must obey the GNU General Public License in
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* all respects for all other code used. Additionally, AlliedModders LLC grants
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* this exception to all derivative works. AlliedModders LLC defines further
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* exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),
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* or <http://www.sourcemod.net/license.php>.
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*
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* Version: $Id$
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*/
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#include <string.h>
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#include <stdarg.h>
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#include <assert.h>
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#include <limits.h>
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#include "sp_vm_api.h"
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#include "sp_vm_basecontext.h"
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#include "sp_vm_engine.h"
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#include "x86/jit_x86.h"
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using namespace SourcePawn;
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#define CELLBOUNDMAX (INT_MAX/sizeof(cell_t))
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#define STACKMARGIN ((cell_t)(16*sizeof(cell_t)))
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BaseContext::BaseContext(BaseRuntime *pRuntime)
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{
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m_pRuntime = pRuntime;
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m_pPlugin = m_pRuntime->m_pPlugin;
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m_InExec = false;
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m_CustomMsg = false;
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/* Initialize the null references */
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uint32_t index;
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if (FindPubvarByName("NULL_VECTOR", &index) == SP_ERROR_NONE)
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{
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sp_pubvar_t *pubvar;
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GetPubvarByIndex(index, &pubvar);
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m_pNullVec = pubvar->offs;
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}
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else
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{
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m_pNullVec = NULL;
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}
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if (FindPubvarByName("NULL_STRING", &index) == SP_ERROR_NONE)
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{
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sp_pubvar_t *pubvar;
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GetPubvarByIndex(index, &pubvar);
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m_pNullString = pubvar->offs;
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}
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else
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{
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m_pNullString = NULL;
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}
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m_ctx.hp = m_pPlugin->data_size;
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m_ctx.sp = m_pPlugin->mem_size - sizeof(cell_t);
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m_ctx.frm = m_ctx.sp;
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m_ctx.n_err = SP_ERROR_NONE;
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m_ctx.n_idx = SP_ERROR_NONE;
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m_ctx.rp = 0;
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g_Jit.SetupContextVars(m_pRuntime, this, &m_ctx);
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}
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BaseContext::~BaseContext()
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{
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g_Jit.FreeContextVars(&m_ctx);
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}
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IVirtualMachine *BaseContext::GetVirtualMachine()
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{
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return NULL;
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}
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sp_context_t *BaseContext::GetContext()
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{
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return reinterpret_cast<sp_context_t *>((IPluginContext * )this);
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}
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sp_context_t *BaseContext::GetCtx()
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{
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return &m_ctx;
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}
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bool BaseContext::IsDebugging()
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{
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return true;
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}
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int BaseContext::SetDebugBreak(void *newpfn, void *oldpfn)
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{
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return SP_ERROR_ABORTED;
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}
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IPluginDebugInfo *BaseContext::GetDebugInfo()
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{
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return NULL;
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}
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int BaseContext::Execute(uint32_t code_addr, cell_t *result)
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{
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return SP_ERROR_ABORTED;
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}
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void BaseContext::SetErrorMessage(const char *msg, va_list ap)
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{
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m_CustomMsg = true;
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vsnprintf(m_MsgCache, sizeof(m_MsgCache), msg, ap);
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}
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void BaseContext::_SetErrorMessage(const char *msg, ...)
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{
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va_list ap;
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va_start(ap, msg);
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SetErrorMessage(msg, ap);
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va_end(ap);
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}
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cell_t BaseContext::ThrowNativeErrorEx(int error, const char *msg, ...)
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{
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if (!m_InExec)
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{
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return 0;
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}
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m_ctx.n_err = error;
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if (msg)
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{
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va_list ap;
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va_start(ap, msg);
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SetErrorMessage(msg, ap);
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va_end(ap);
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}
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return 0;
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}
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cell_t BaseContext::ThrowNativeError(const char *msg, ...)
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{
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if (!m_InExec)
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{
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return 0;
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}
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m_ctx.n_err = SP_ERROR_NATIVE;
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if (msg)
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{
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va_list ap;
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va_start(ap, msg);
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SetErrorMessage(msg, ap);
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va_end(ap);
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}
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return 0;
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}
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int BaseContext::HeapAlloc(unsigned int cells, cell_t *local_addr, cell_t **phys_addr)
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{
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cell_t *addr;
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ucell_t realmem;
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#if 0
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if (cells > CELLBOUNDMAX)
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{
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return SP_ERROR_ARAM;
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}
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#else
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assert(cells < CELLBOUNDMAX);
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#endif
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realmem = cells * sizeof(cell_t);
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/**
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* Check if the space between the heap and stack is sufficient.
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*/
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if ((cell_t)(m_ctx.sp - m_ctx.hp - realmem) < STACKMARGIN)
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{
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return SP_ERROR_HEAPLOW;
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}
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addr = (cell_t *)(m_pPlugin->memory + m_ctx.hp);
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/* store size of allocation in cells */
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*addr = (cell_t)cells;
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addr++;
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m_ctx.hp += sizeof(cell_t);
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*local_addr = m_ctx.hp;
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if (phys_addr)
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{
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*phys_addr = addr;
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}
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m_ctx.hp += realmem;
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return SP_ERROR_NONE;
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}
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int BaseContext::HeapPop(cell_t local_addr)
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{
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cell_t cellcount;
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cell_t *addr;
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/* check the bounds of this address */
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local_addr -= sizeof(cell_t);
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if (local_addr < (cell_t)m_pPlugin->data_size || local_addr >= m_ctx.sp)
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{
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return SP_ERROR_INVALID_ADDRESS;
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}
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addr = (cell_t *)(m_pPlugin->memory + local_addr);
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cellcount = (*addr) * sizeof(cell_t);
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/* check if this memory count looks valid */
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if ((signed)(m_ctx.hp - cellcount - sizeof(cell_t)) != local_addr)
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{
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return SP_ERROR_INVALID_ADDRESS;
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}
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m_ctx.hp = local_addr;
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return SP_ERROR_NONE;
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}
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int BaseContext::HeapRelease(cell_t local_addr)
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{
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if (local_addr < (cell_t)m_pPlugin->data_size)
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{
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return SP_ERROR_INVALID_ADDRESS;
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}
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m_ctx.hp = local_addr - sizeof(cell_t);
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return SP_ERROR_NONE;
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}
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int BaseContext::FindNativeByName(const char *name, uint32_t *index)
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{
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return m_pRuntime->FindNativeByName(name, index);
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}
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int BaseContext::GetNativeByIndex(uint32_t index, sp_native_t **native)
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{
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return m_pRuntime->GetNativeByIndex(index, native);
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}
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uint32_t BaseContext::GetNativesNum()
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{
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return m_pRuntime->GetNativesNum();
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}
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int BaseContext::FindPublicByName(const char *name, uint32_t *index)
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{
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return m_pRuntime->FindPublicByName(name, index);
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}
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int BaseContext::GetPublicByIndex(uint32_t index, sp_public_t **pblic)
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{
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return m_pRuntime->GetPublicByIndex(index, pblic);
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}
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uint32_t BaseContext::GetPublicsNum()
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{
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return m_pRuntime->GetPublicsNum();
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}
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int BaseContext::GetPubvarByIndex(uint32_t index, sp_pubvar_t **pubvar)
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{
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return m_pRuntime->GetPubvarByIndex(index, pubvar);
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}
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int BaseContext::FindPubvarByName(const char *name, uint32_t *index)
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{
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return m_pRuntime->FindPubvarByName(name, index);
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}
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int BaseContext::GetPubvarAddrs(uint32_t index, cell_t *local_addr, cell_t **phys_addr)
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{
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return m_pRuntime->GetPubvarAddrs(index, local_addr, phys_addr);
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}
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uint32_t BaseContext::GetPubVarsNum()
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{
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return m_pRuntime->GetPubVarsNum();
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}
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int BaseContext::BindNatives(const sp_nativeinfo_t *natives, unsigned int num, int overwrite)
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{
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return SP_ERROR_ABORTED;
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}
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int BaseContext::BindNative(const sp_nativeinfo_t *native)
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{
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return SP_ERROR_ABORTED;
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}
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int BaseContext::BindNativeToIndex(uint32_t index, SPVM_NATIVE_FUNC func)
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{
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return SP_ERROR_ABORTED;
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}
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int BaseContext::BindNativeToAny(SPVM_NATIVE_FUNC native)
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{
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return SP_ERROR_ABORTED;
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}
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int BaseContext::LocalToPhysAddr(cell_t local_addr, cell_t **phys_addr)
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{
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if (((local_addr >= m_ctx.hp) && (local_addr < m_ctx.sp))
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|| (local_addr < 0) || ((ucell_t)local_addr >= m_pPlugin->mem_size))
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{
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return SP_ERROR_INVALID_ADDRESS;
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}
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if (phys_addr)
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{
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*phys_addr = (cell_t *)(m_pPlugin->memory + local_addr);
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}
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return SP_ERROR_NONE;
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}
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int BaseContext::PushCell(cell_t value)
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{
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return SP_ERROR_ABORTED;
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}
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int BaseContext::PushCellsFromArray(cell_t array[], unsigned int numcells)
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{
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return SP_ERROR_ABORTED;
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}
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int BaseContext::PushCellArray(cell_t *local_addr, cell_t **phys_addr, cell_t array[], unsigned int numcells)
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{
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return SP_ERROR_ABORTED;
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}
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int BaseContext::LocalToString(cell_t local_addr, char **addr)
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{
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if (((local_addr >= m_ctx.hp) && (local_addr < m_ctx.sp))
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|| (local_addr < 0) || ((ucell_t)local_addr >= m_pPlugin->mem_size))
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{
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return SP_ERROR_INVALID_ADDRESS;
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}
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*addr = (char *)(m_pPlugin->memory + local_addr);
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return SP_ERROR_NONE;
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}
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int BaseContext::PushString(cell_t *local_addr, char **phys_addr, const char *string)
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{
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return SP_ERROR_ABORTED;
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}
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int BaseContext::StringToLocal(cell_t local_addr, size_t bytes, const char *source)
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{
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char *dest;
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size_t len;
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if (((local_addr >= m_ctx.hp) && (local_addr < m_ctx.sp))
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|| (local_addr < 0) || ((ucell_t)local_addr >= m_pPlugin->mem_size))
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{
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return SP_ERROR_INVALID_ADDRESS;
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}
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if (bytes == 0)
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{
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return SP_ERROR_NONE;
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}
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len = strlen(source);
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dest = (char *)(m_pPlugin->memory + local_addr);
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if (len >= bytes)
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{
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len = bytes - 1;
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}
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memmove(dest, source, len);
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dest[len] = '\0';
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return SP_ERROR_NONE;
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}
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inline int __CheckValidChar(char *c)
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{
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int count;
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int bytecount = 0;
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for (count=1; (*c & 0xC0) == 0x80; count++)
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{
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c--;
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}
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switch (*c & 0xF0)
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{
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case 0xC0:
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case 0xD0:
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{
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bytecount = 2;
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break;
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}
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case 0xE0:
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{
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bytecount = 3;
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break;
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}
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case 0xF0:
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{
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bytecount = 4;
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break;
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}
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}
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if (bytecount != count)
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{
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return count;
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}
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return 0;
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}
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int BaseContext::StringToLocalUTF8(cell_t local_addr, size_t maxbytes, const char *source, size_t *wrtnbytes)
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{
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char *dest;
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size_t len;
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bool needtocheck = false;
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if (((local_addr >= m_ctx.hp) && (local_addr < m_ctx.sp))
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|| (local_addr < 0)
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|| ((ucell_t)local_addr >= m_pPlugin->mem_size))
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{
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return SP_ERROR_INVALID_ADDRESS;
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}
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if (maxbytes == 0)
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{
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return SP_ERROR_NONE;
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}
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len = strlen(source);
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dest = (char *)(m_pPlugin->memory + local_addr);
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if ((size_t)len >= maxbytes)
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{
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len = maxbytes - 1;
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needtocheck = true;
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}
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memmove(dest, source, len);
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if ((dest[len-1] & 1<<7) && needtocheck)
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{
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len -= __CheckValidChar(dest+len-1);
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}
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dest[len] = '\0';
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if (wrtnbytes)
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{
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*wrtnbytes = len;
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}
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return SP_ERROR_NONE;
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}
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IPluginFunction *BaseContext::GetFunctionById(funcid_t func_id)
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{
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return m_pRuntime->GetFunctionById(func_id);
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}
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IPluginFunction *BaseContext::GetFunctionByName(const char *public_name)
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{
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return m_pRuntime->GetFunctionByName(public_name);
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}
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int BaseContext::LocalToStringNULL(cell_t local_addr, char **addr)
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{
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int err;
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if ((err = LocalToString(local_addr, addr)) != SP_ERROR_NONE)
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{
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return err;
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}
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if ((cell_t *)*addr == m_pNullString)
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{
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*addr = NULL;
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}
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return SP_ERROR_NONE;
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}
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SourceMod::IdentityToken_t *BaseContext::GetIdentity()
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{
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SourceMod::IdentityToken_t *tok;
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if (GetKey(1, (void **)&tok))
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{
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return tok;
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}
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return NULL;
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}
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cell_t *BaseContext::GetNullRef(SP_NULL_TYPE type)
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{
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if (type == SP_NULL_VECTOR)
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{
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return m_pNullVec;
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}
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return NULL;
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}
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bool BaseContext::IsInExec()
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{
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return m_InExec;
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}
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int BaseContext::Execute2(IPluginFunction *function, const cell_t *params, unsigned int num_params, cell_t *result)
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{
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int ir;
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int serial;
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cell_t *sp;
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funcid_t fnid;
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JitFunction *fn;
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sp_public_t *pubfunc;
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cell_t _ignore_result;
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unsigned int public_id;
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fnid = function->GetFunctionID();
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if (fnid & 1)
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{
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public_id = fnid >> 1;
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if (m_pRuntime->GetPublicByIndex(public_id, &pubfunc) != SP_ERROR_NONE)
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{
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return SP_ERROR_NOT_FOUND;
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}
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}
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else
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{
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return SP_ERROR_INVALID_ADDRESS;
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}
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if (m_pRuntime->IsPaused())
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{
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return SP_ERROR_NOT_RUNNABLE;
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}
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if ((cell_t)(m_ctx.hp + 16*sizeof(cell_t)) > (cell_t)(m_ctx.sp - (sizeof(cell_t) * (num_params + 1))))
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{
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return SP_ERROR_STACKLOW;
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}
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if (result == NULL)
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{
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result = &_ignore_result;
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}
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/* We got this far. It's time to start profiling. */
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if ((m_pPlugin->prof_flags & SP_PROF_CALLBACKS) == SP_PROF_CALLBACKS)
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{
|
|
serial = m_pPlugin->profiler->OnCallbackBegin(this, pubfunc);
|
|
}
|
|
|
|
/* See if we have to compile the callee. */
|
|
if ((fn = m_pRuntime->m_PubJitFuncs[public_id]) == NULL)
|
|
{
|
|
uint32_t func_idx;
|
|
|
|
/* We might not have to - check pcode offset. */
|
|
if ((func_idx = FuncLookup((CompData *)m_pRuntime->m_pCo, pubfunc->code_offs)) != 0)
|
|
{
|
|
fn = m_pRuntime->GetJittedFunction(func_idx);
|
|
assert(fn != NULL);
|
|
m_pRuntime->m_PubJitFuncs[public_id] = fn;
|
|
}
|
|
else
|
|
{
|
|
if ((fn = g_Jit.CompileFunction(m_pRuntime, pubfunc->code_offs, &ir)) == NULL)
|
|
{
|
|
return ir;
|
|
}
|
|
m_pRuntime->m_PubJitFuncs[public_id] = fn;
|
|
}
|
|
}
|
|
|
|
/* Save our previous state. */
|
|
|
|
bool save_exec;
|
|
uint32_t save_n_idx;
|
|
cell_t save_sp, save_hp, save_rp, save_cip;
|
|
|
|
save_sp = m_ctx.sp;
|
|
save_hp = m_ctx.hp;
|
|
save_exec = m_InExec;
|
|
save_n_idx = m_ctx.n_idx;
|
|
save_rp = m_ctx.rp;
|
|
save_cip = m_ctx.err_cip;
|
|
|
|
/* Push parameters */
|
|
|
|
m_ctx.sp -= sizeof(cell_t) * (num_params + 1);
|
|
sp = (cell_t *)(m_pPlugin->memory + m_ctx.sp);
|
|
|
|
sp[0] = num_params;
|
|
for (unsigned int i = 0; i < num_params; i++)
|
|
{
|
|
sp[i + 1] = params[i];
|
|
}
|
|
|
|
/* Clear internal state */
|
|
m_ctx.n_err = SP_ERROR_NONE;
|
|
m_ctx.n_idx = 0;
|
|
m_MsgCache[0] = '\0';
|
|
m_CustomMsg = false;
|
|
m_InExec = true;
|
|
|
|
/* Start the frame tracer */
|
|
|
|
ir = g_Jit.InvokeFunction(m_pRuntime, fn, result);
|
|
|
|
/* Restore some states, stop the frame tracer */
|
|
|
|
m_InExec = save_exec;
|
|
|
|
if (ir == SP_ERROR_NONE)
|
|
{
|
|
m_ctx.n_err = SP_ERROR_NONE;
|
|
if (m_ctx.sp != save_sp)
|
|
{
|
|
ir = SP_ERROR_STACKLEAK;
|
|
_SetErrorMessage("Stack leak detected: sp:%d should be %d!",
|
|
m_ctx.sp,
|
|
save_sp);
|
|
}
|
|
if (m_ctx.hp != save_hp)
|
|
{
|
|
ir = SP_ERROR_HEAPLEAK;
|
|
_SetErrorMessage("Heap leak detected: hp:%d should be %d!",
|
|
m_ctx.hp,
|
|
save_hp);
|
|
}
|
|
if (m_ctx.rp != save_rp)
|
|
{
|
|
ir = SP_ERROR_STACKLEAK;
|
|
_SetErrorMessage("Return stack leak detected: rp:%d should be %d!",
|
|
m_ctx.rp,
|
|
save_rp);
|
|
}
|
|
}
|
|
|
|
if (ir != SP_ERROR_NONE)
|
|
{
|
|
g_engine1.ReportError(m_pRuntime, ir, m_MsgCache, save_rp);
|
|
}
|
|
|
|
m_ctx.sp = save_sp;
|
|
m_ctx.hp = save_hp;
|
|
m_ctx.rp = save_rp;
|
|
|
|
if ((m_pPlugin->prof_flags & SP_PROF_CALLBACKS) == SP_PROF_CALLBACKS)
|
|
{
|
|
m_pPlugin->profiler->OnCallbackEnd(serial);
|
|
}
|
|
|
|
m_ctx.err_cip = save_cip;
|
|
m_ctx.n_idx = save_n_idx;
|
|
m_ctx.n_err = SP_ERROR_NONE;
|
|
m_MsgCache[0] = '\0';
|
|
m_CustomMsg = false;
|
|
|
|
return ir;
|
|
}
|
|
|
|
IPluginRuntime *BaseContext::GetRuntime()
|
|
{
|
|
return m_pRuntime;
|
|
}
|
|
|
|
DebugInfo::DebugInfo(sp_plugin_t *plugin) : m_pPlugin(plugin)
|
|
{
|
|
}
|
|
|
|
#define USHR(x) ((unsigned int)(x)>>1)
|
|
|
|
int DebugInfo::LookupFile(ucell_t addr, const char **filename)
|
|
{
|
|
int high, low, mid;
|
|
|
|
high = m_pPlugin->debug.files_num;
|
|
low = -1;
|
|
|
|
while (high - low > 1)
|
|
{
|
|
mid = USHR(low + high);
|
|
if (m_pPlugin->debug.files[mid].addr <= addr)
|
|
{
|
|
low = mid;
|
|
} else {
|
|
high = mid;
|
|
}
|
|
}
|
|
|
|
if (low == -1)
|
|
{
|
|
return SP_ERROR_NOT_FOUND;
|
|
}
|
|
|
|
*filename = m_pPlugin->debug.stringbase + m_pPlugin->debug.files[low].name;
|
|
|
|
return SP_ERROR_NONE;
|
|
}
|
|
|
|
int DebugInfo::LookupFunction(ucell_t addr, const char **name)
|
|
{
|
|
if (!m_pPlugin->debug.unpacked)
|
|
{
|
|
uint32_t max, iter;
|
|
sp_fdbg_symbol_t *sym;
|
|
sp_fdbg_arraydim_t *arr;
|
|
uint8_t *cursor = (uint8_t *)(m_pPlugin->debug.symbols);
|
|
|
|
max = m_pPlugin->debug.syms_num;
|
|
for (iter = 0; iter < max; iter++)
|
|
{
|
|
sym = (sp_fdbg_symbol_t *)cursor;
|
|
|
|
if (sym->ident == SP_SYM_FUNCTION
|
|
&& sym->codestart <= addr
|
|
&& sym->codeend > addr)
|
|
{
|
|
*name = m_pPlugin->debug.stringbase + sym->name;
|
|
return SP_ERROR_NONE;
|
|
}
|
|
|
|
if (sym->dimcount > 0)
|
|
{
|
|
cursor += sizeof(sp_fdbg_symbol_t);
|
|
arr = (sp_fdbg_arraydim_t *)cursor;
|
|
cursor += sizeof(sp_fdbg_arraydim_t) * sym->dimcount;
|
|
continue;
|
|
}
|
|
|
|
cursor += sizeof(sp_fdbg_symbol_t);
|
|
}
|
|
|
|
return SP_ERROR_NOT_FOUND;
|
|
}
|
|
else
|
|
{
|
|
uint32_t max, iter;
|
|
sp_u_fdbg_symbol_t *sym;
|
|
sp_u_fdbg_arraydim_t *arr;
|
|
uint8_t *cursor = (uint8_t *)(m_pPlugin->debug.symbols);
|
|
|
|
max = m_pPlugin->debug.syms_num;
|
|
for (iter = 0; iter < max; iter++)
|
|
{
|
|
sym = (sp_u_fdbg_symbol_t *)cursor;
|
|
|
|
if (sym->ident == SP_SYM_FUNCTION
|
|
&& sym->codestart <= addr
|
|
&& sym->codeend > addr)
|
|
{
|
|
*name = m_pPlugin->debug.stringbase + sym->name;
|
|
return SP_ERROR_NONE;
|
|
}
|
|
|
|
if (sym->dimcount > 0)
|
|
{
|
|
cursor += sizeof(sp_u_fdbg_symbol_t);
|
|
arr = (sp_u_fdbg_arraydim_t *)cursor;
|
|
cursor += sizeof(sp_u_fdbg_arraydim_t) * sym->dimcount;
|
|
continue;
|
|
}
|
|
|
|
cursor += sizeof(sp_u_fdbg_symbol_t);
|
|
}
|
|
|
|
return SP_ERROR_NOT_FOUND;
|
|
}
|
|
}
|
|
|
|
int DebugInfo::LookupLine(ucell_t addr, uint32_t *line)
|
|
{
|
|
int high, low, mid;
|
|
|
|
high = m_pPlugin->debug.lines_num;
|
|
low = -1;
|
|
|
|
while (high - low > 1)
|
|
{
|
|
mid = USHR(low + high);
|
|
if (m_pPlugin->debug.lines[mid].addr <= addr)
|
|
{
|
|
low = mid;
|
|
} else {
|
|
high = mid;
|
|
}
|
|
}
|
|
|
|
if (low == -1)
|
|
{
|
|
return SP_ERROR_NOT_FOUND;
|
|
}
|
|
|
|
/* Since the CIP occurs BEFORE the line, we have to add one */
|
|
*line = m_pPlugin->debug.lines[low].line + 1;
|
|
|
|
return SP_ERROR_NONE;
|
|
}
|
|
|
|
#undef USHR
|
|
|
|
int BaseContext::GetLastNativeError()
|
|
{
|
|
return m_ctx.n_err;
|
|
}
|
|
|
|
cell_t *BaseContext::GetLocalParams()
|
|
{
|
|
return (cell_t *)(m_pPlugin->memory + m_ctx.frm + (2 * sizeof(cell_t)));
|
|
}
|
|
|
|
void BaseContext::SetKey(int k, void *value)
|
|
{
|
|
if (k < 1 || k > 4)
|
|
{
|
|
return;
|
|
}
|
|
|
|
m_keys[k - 1] = value;
|
|
m_keys_set[k - 1] = true;
|
|
}
|
|
|
|
bool BaseContext::GetKey(int k, void **value)
|
|
{
|
|
if (k < 1 || k > 4 || m_keys_set[k - 1] == false)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
*value = m_keys[k - 1];
|
|
|
|
return true;
|
|
}
|
|
|
|
void BaseContext::ClearLastNativeError()
|
|
{
|
|
m_ctx.n_err = SP_ERROR_NONE;
|
|
}
|