drh
346 lines
8.1 KiB
C
346 lines
8.1 KiB
C
/*
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** 2007 August 15
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**
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** The author disclaims copyright to this source code. In place of
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** a legal notice, here is a blessing:
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**
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** May you do good and not evil.
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** May you find forgiveness for yourself and forgive others.
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** May you share freely, never taking more than you give.
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**
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*************************************************************************
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**
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** This file contains code used to implement test interfaces to the
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** memory allocation subsystem.
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**
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** $Id: test_malloc.c,v 1.5 2007/08/24 03:51:34 drh Exp $
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*/
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#include "sqliteInt.h"
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#include "tcl.h"
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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/*
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** Transform pointers to text and back again
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*/
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static void pointerToText(void *p, char *z){
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static const char zHex[] = "0123456789abcdef";
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int i, k;
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unsigned int u;
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sqlite3_uint64 n;
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if( sizeof(n)==sizeof(p) ){
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memcpy(&n, &p, sizeof(p));
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}else if( sizeof(u)==sizeof(p) ){
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memcpy(&u, &p, sizeof(u));
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n = u;
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}else{
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assert( 0 );
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}
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for(i=0, k=sizeof(p)*2-1; i<sizeof(p)*2; i++, k--){
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z[k] = zHex[n&0xf];
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n >>= 4;
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}
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z[sizeof(p)*2] = 0;
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}
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static int hexToInt(int h){
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if( h>='0' && h<='9' ){
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return h - '0';
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}else if( h>='a' && h<='f' ){
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return h - 'a' + 10;
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}else{
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return -1;
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}
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}
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static int textToPointer(const char *z, void **pp){
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sqlite3_uint64 n = 0;
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int i;
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unsigned int u;
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for(i=0; i<sizeof(void*)*2 && z[0]; i++){
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int v;
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v = hexToInt(*z++);
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if( v<0 ) return TCL_ERROR;
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n = n*16 + v;
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}
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if( *z!=0 ) return TCL_ERROR;
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if( sizeof(n)==sizeof(*pp) ){
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memcpy(pp, &n, sizeof(n));
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}else if( sizeof(u)==sizeof(*pp) ){
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u = (unsigned int)n;
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memcpy(pp, &u, sizeof(u));
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}else{
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assert( 0 );
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}
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return TCL_OK;
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}
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/*
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** Usage: sqlite3_malloc NBYTES
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**
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** Raw test interface for sqlite3_malloc().
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*/
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static int test_malloc(
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void * clientData,
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Tcl_Interp *interp,
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int objc,
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Tcl_Obj *CONST objv[]
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){
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int nByte;
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void *p;
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char zOut[100];
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if( objc!=2 ){
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Tcl_WrongNumArgs(interp, 1, objv, "NBYTES");
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return TCL_ERROR;
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}
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if( Tcl_GetIntFromObj(interp, objv[1], &nByte) ) return TCL_ERROR;
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p = sqlite3_malloc((unsigned)nByte);
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pointerToText(p, zOut);
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Tcl_AppendResult(interp, zOut, NULL);
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return TCL_OK;
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}
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/*
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** Usage: sqlite3_realloc PRIOR NBYTES
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**
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** Raw test interface for sqlite3_realloc().
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*/
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static int test_realloc(
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void * clientData,
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Tcl_Interp *interp,
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int objc,
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Tcl_Obj *CONST objv[]
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){
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int nByte;
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void *pPrior, *p;
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char zOut[100];
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if( objc!=3 ){
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Tcl_WrongNumArgs(interp, 1, objv, "PRIOR NBYTES");
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return TCL_ERROR;
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}
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if( Tcl_GetIntFromObj(interp, objv[2], &nByte) ) return TCL_ERROR;
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if( textToPointer(Tcl_GetString(objv[1]), &pPrior) ){
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Tcl_AppendResult(interp, "bad pointer: ", Tcl_GetString(objv[1]), (char*)0);
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return TCL_ERROR;
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}
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p = sqlite3_realloc(pPrior, (unsigned)nByte);
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pointerToText(p, zOut);
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Tcl_AppendResult(interp, zOut, NULL);
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return TCL_OK;
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}
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/*
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** Usage: sqlite3_free PRIOR
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**
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** Raw test interface for sqlite3_free().
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*/
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static int test_free(
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void * clientData,
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Tcl_Interp *interp,
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int objc,
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Tcl_Obj *CONST objv[]
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){
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void *pPrior;
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if( objc!=2 ){
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Tcl_WrongNumArgs(interp, 1, objv, "PRIOR");
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return TCL_ERROR;
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}
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if( textToPointer(Tcl_GetString(objv[1]), &pPrior) ){
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Tcl_AppendResult(interp, "bad pointer: ", Tcl_GetString(objv[1]), (char*)0);
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return TCL_ERROR;
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}
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sqlite3_free(pPrior);
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return TCL_OK;
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}
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/*
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** Usage: sqlite3_memory_used
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**
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** Raw test interface for sqlite3_memory_used().
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*/
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static int test_memory_used(
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void * clientData,
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Tcl_Interp *interp,
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int objc,
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Tcl_Obj *CONST objv[]
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){
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Tcl_SetObjResult(interp, Tcl_NewWideIntObj(sqlite3_memory_used()));
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return TCL_OK;
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}
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/*
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** Usage: sqlite3_memory_highwater ?RESETFLAG?
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**
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** Raw test interface for sqlite3_memory_highwater().
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*/
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static int test_memory_highwater(
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void * clientData,
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Tcl_Interp *interp,
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int objc,
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Tcl_Obj *CONST objv[]
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){
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int resetFlag = 0;
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if( objc!=1 && objc!=2 ){
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Tcl_WrongNumArgs(interp, 1, objv, "?RESET?");
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return TCL_ERROR;
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}
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if( objc==2 ){
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if( Tcl_GetBooleanFromObj(interp, objv[1], &resetFlag) ) return TCL_ERROR;
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}
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Tcl_SetObjResult(interp,
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Tcl_NewWideIntObj(sqlite3_memory_highwater(resetFlag)));
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return TCL_OK;
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}
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/*
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** Usage: sqlite3_memdebug_backtrace DEPTH
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**
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** Set the depth of backtracing. If SQLITE_MEMDEBUG is not defined
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** then this routine is a no-op.
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*/
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static int test_memdebug_backtrace(
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void * clientData,
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Tcl_Interp *interp,
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int objc,
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Tcl_Obj *CONST objv[]
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){
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int depth;
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if( objc!=2 ){
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Tcl_WrongNumArgs(interp, 1, objv, "DEPT");
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return TCL_ERROR;
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}
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if( Tcl_GetIntFromObj(interp, objv[1], &depth) ) return TCL_ERROR;
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#ifdef SQLITE_MEMDEBUG
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{
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extern void sqlite3_memdebug_backtrace(int);
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sqlite3_memdebug_backtrace(depth);
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}
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#endif
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return TCL_OK;
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}
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/*
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** Usage: sqlite3_memdebug_dump FILENAME
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**
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** Write a summary of unfreed memory to FILENAME.
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*/
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static int test_memdebug_dump(
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void * clientData,
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Tcl_Interp *interp,
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int objc,
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Tcl_Obj *CONST objv[]
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){
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if( objc!=2 ){
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Tcl_WrongNumArgs(interp, 1, objv, "FILENAME");
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return TCL_ERROR;
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}
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#ifdef SQLITE_MEMDEBUG
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{
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extern void sqlite3_memdebug_dump(const char*);
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sqlite3_memdebug_dump(Tcl_GetString(objv[1]));
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}
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#endif
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return TCL_OK;
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}
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/*
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** Usage: sqlite3_memdebug_fail COUNTER ?REPEAT?
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**
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** Arrange for a simulated malloc() failure after COUNTER successes.
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** If REPEAT is 1 then all subsequent malloc()s fail. If REPEAT is
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** 0 then only a single failure occurs.
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**
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** Each call to this routine overrides the prior counter value.
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** This routine returns the number of simulated failures that have
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** happened since the previous call to this routine.
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**
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** To disable simulated failures, use a COUNTER of -1.
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*/
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static int test_memdebug_fail(
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void * clientData,
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Tcl_Interp *interp,
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int objc,
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Tcl_Obj *CONST objv[]
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){
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int iFail;
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int iRepeat;
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int nFail = 0;
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if( objc!=3 && objc!=2 ){
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Tcl_WrongNumArgs(interp, 1, objv, "COUNTER ?REPEAT?");
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return TCL_ERROR;
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}
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if( Tcl_GetIntFromObj(interp, objv[1], &iFail) ) return TCL_ERROR;
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if( objc==3 ){
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if( Tcl_GetIntFromObj(interp, objv[2], &iRepeat) ) return TCL_ERROR;
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}else{
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iRepeat = -1;
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}
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#ifdef SQLITE_MEMDEBUG
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{
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extern int sqlite3_memdebug_fail(int,int);
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nFail = sqlite3_memdebug_fail(iFail, iRepeat);
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}
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#endif
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Tcl_SetObjResult(interp, Tcl_NewIntObj(nFail));
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return TCL_OK;
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}
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/*
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** Usage: sqlite3_memdebug_settitle TITLE
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**
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** Set a title string stored with each allocation. The TITLE is
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** typically the name of the test that was running when the
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** allocation occurred. The TITLE is stored with the allocation
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** and can be used to figure out which tests are leaking memory.
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**
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** Each title overwrite the previous.
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*/
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static int test_memdebug_settitle(
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void * clientData,
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Tcl_Interp *interp,
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int objc,
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Tcl_Obj *CONST objv[]
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){
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const char *zTitle;
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if( objc!=2 ){
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Tcl_WrongNumArgs(interp, 1, objv, "TITLE");
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return TCL_ERROR;
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}
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zTitle = Tcl_GetString(objv[1]);
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#ifdef SQLITE_MEMDEBUG
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{
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extern int sqlite3_memdebug_settitle(const char*);
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sqlite3_memdebug_settitle(zTitle);
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}
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#endif
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return TCL_OK;
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}
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/*
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** Register commands with the TCL interpreter.
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*/
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int Sqlitetest_malloc_Init(Tcl_Interp *interp){
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static struct {
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char *zName;
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Tcl_ObjCmdProc *xProc;
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} aObjCmd[] = {
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{ "sqlite3_malloc", test_malloc },
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{ "sqlite3_realloc", test_realloc },
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{ "sqlite3_free", test_free },
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{ "sqlite3_memory_used", test_memory_used },
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{ "sqlite3_memory_highwater", test_memory_highwater },
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{ "sqlite3_memdebug_backtrace", test_memdebug_backtrace },
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{ "sqlite3_memdebug_dump", test_memdebug_dump },
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{ "sqlite3_memdebug_fail", test_memdebug_fail },
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{ "sqlite3_memdebug_settitle", test_memdebug_settitle },
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};
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int i;
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for(i=0; i<sizeof(aObjCmd)/sizeof(aObjCmd[0]); i++){
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Tcl_CreateObjCommand(interp, aObjCmd[i].zName, aObjCmd[i].xProc, 0, 0);
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}
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return TCL_OK;
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}
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