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test_malloc.c
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1494 lines (1395 loc) · 39.3 KB
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/*
** 2007 August 15
**
** The author disclaims copyright to this source code. In place of
** a legal notice, here is a blessing:
**
** May you do good and not evil.
** May you find forgiveness for yourself and forgive others.
** May you share freely, never taking more than you give.
**
*************************************************************************
**
** This file contains code used to implement test interfaces to the
** memory allocation subsystem.
*/
#include "sqliteInt.h"
#include "tcl.h"
#include <stdlib.h>
#include <string.h>
#include <assert.h>
/*
** This structure is used to encapsulate the global state variables used
** by malloc() fault simulation.
*/
static struct MemFault {
int iCountdown; /* Number of pending successes before a failure */
int nRepeat; /* Number of times to repeat the failure */
int nBenign; /* Number of benign failures seen since last config */
int nFail; /* Number of failures seen since last config */
u8 enable; /* True if enabled */
int isInstalled; /* True if the fault simulation layer is installed */
int isBenignMode; /* True if malloc failures are considered benign */
sqlite3_mem_methods m; /* 'Real' malloc implementation */
} memfault;
/*
** This routine exists as a place to set a breakpoint that will
** fire on any simulated malloc() failure.
*/
static void sqlite3Fault(void){
static int cnt = 0;
cnt++;
}
/*
** Check to see if a fault should be simulated. Return true to simulate
** the fault. Return false if the fault should not be simulated.
*/
static int faultsimStep(void){
if( likely(!memfault.enable) ){
return 0;
}
if( memfault.iCountdown>0 ){
memfault.iCountdown--;
return 0;
}
sqlite3Fault();
memfault.nFail++;
if( memfault.isBenignMode>0 ){
memfault.nBenign++;
}
memfault.nRepeat--;
if( memfault.nRepeat<=0 ){
memfault.enable = 0;
}
return 1;
}
/*
** A version of sqlite3_mem_methods.xMalloc() that includes fault simulation
** logic.
*/
static void *faultsimMalloc(int n){
void *p = 0;
if( !faultsimStep() ){
p = memfault.m.xMalloc(n);
}
return p;
}
/*
** A version of sqlite3_mem_methods.xRealloc() that includes fault simulation
** logic.
*/
static void *faultsimRealloc(void *pOld, int n){
void *p = 0;
if( !faultsimStep() ){
p = memfault.m.xRealloc(pOld, n);
}
return p;
}
/*
** The following method calls are passed directly through to the underlying
** malloc system:
**
** xFree
** xSize
** xRoundup
** xInit
** xShutdown
*/
static void faultsimFree(void *p){
memfault.m.xFree(p);
}
static int faultsimSize(void *p){
return memfault.m.xSize(p);
}
static int faultsimRoundup(int n){
return memfault.m.xRoundup(n);
}
static int faultsimInit(void *p){
return memfault.m.xInit(memfault.m.pAppData);
}
static void faultsimShutdown(void *p){
memfault.m.xShutdown(memfault.m.pAppData);
}
/*
** This routine configures the malloc failure simulation. After
** calling this routine, the next nDelay mallocs will succeed, followed
** by a block of nRepeat failures, after which malloc() calls will begin
** to succeed again.
*/
static void faultsimConfig(int nDelay, int nRepeat){
memfault.iCountdown = nDelay;
memfault.nRepeat = nRepeat;
memfault.nBenign = 0;
memfault.nFail = 0;
memfault.enable = nDelay>=0;
/* Sometimes, when running multi-threaded tests, the isBenignMode
** variable is not properly incremented/decremented so that it is
** 0 when not inside a benign malloc block. This doesn't affect
** the multi-threaded tests, as they do not use this system. But
** it does affect OOM tests run later in the same process. So
** zero the variable here, just to be sure.
*/
memfault.isBenignMode = 0;
}
/*
** Return the number of faults (both hard and benign faults) that have
** occurred since the injector was last configured.
*/
static int faultsimFailures(void){
return memfault.nFail;
}
/*
** Return the number of benign faults that have occurred since the
** injector was last configured.
*/
static int faultsimBenignFailures(void){
return memfault.nBenign;
}
/*
** Return the number of successes that will occur before the next failure.
** If no failures are scheduled, return -1.
*/
static int faultsimPending(void){
if( memfault.enable ){
return memfault.iCountdown;
}else{
return -1;
}
}
static void faultsimBeginBenign(void){
memfault.isBenignMode++;
}
static void faultsimEndBenign(void){
memfault.isBenignMode--;
}
/*
** Add or remove the fault-simulation layer using sqlite3_config(). If
** the argument is non-zero, the
*/
static int faultsimInstall(int install){
static struct sqlite3_mem_methods m = {
faultsimMalloc, /* xMalloc */
faultsimFree, /* xFree */
faultsimRealloc, /* xRealloc */
faultsimSize, /* xSize */
faultsimRoundup, /* xRoundup */
faultsimInit, /* xInit */
faultsimShutdown, /* xShutdown */
0 /* pAppData */
};
int rc;
install = (install ? 1 : 0);
assert(memfault.isInstalled==1 || memfault.isInstalled==0);
if( install==memfault.isInstalled ){
return SQLITE_ERROR;
}
if( install ){
rc = sqlite3_config(SQLITE_CONFIG_GETMALLOC, &memfault.m);
assert(memfault.m.xMalloc);
if( rc==SQLITE_OK ){
rc = sqlite3_config(SQLITE_CONFIG_MALLOC, &m);
}
sqlite3_test_control(SQLITE_TESTCTRL_BENIGN_MALLOC_HOOKS,
faultsimBeginBenign, faultsimEndBenign
);
}else{
sqlite3_mem_methods m;
assert(memfault.m.xMalloc);
/* One should be able to reset the default memory allocator by storing
** a zeroed allocator then calling GETMALLOC. */
memset(&m, 0, sizeof(m));
sqlite3_config(SQLITE_CONFIG_MALLOC, &m);
sqlite3_config(SQLITE_CONFIG_GETMALLOC, &m);
assert( memcmp(&m, &memfault.m, sizeof(m))==0 );
rc = sqlite3_config(SQLITE_CONFIG_MALLOC, &memfault.m);
sqlite3_test_control(SQLITE_TESTCTRL_BENIGN_MALLOC_HOOKS, 0, 0);
}
if( rc==SQLITE_OK ){
memfault.isInstalled = 1;
}
return rc;
}
#ifdef SQLITE_TEST
/*
** This function is implemented in main.c. Returns a pointer to a static
** buffer containing the symbolic SQLite error code that corresponds to
** the least-significant 8-bits of the integer passed as an argument.
** For example:
**
** sqlite3ErrName(1) -> "SQLITE_ERROR"
*/
extern const char *sqlite3ErrName(int);
/*
** Transform pointers to text and back again
*/
static void pointerToText(void *p, char *z){
static const char zHex[] = "0123456789abcdef";
int i, k;
unsigned int u;
sqlite3_uint64 n;
if( p==0 ){
strcpy(z, "0");
return;
}
if( sizeof(n)==sizeof(p) ){
memcpy(&n, &p, sizeof(p));
}else if( sizeof(u)==sizeof(p) ){
memcpy(&u, &p, sizeof(u));
n = u;
}else{
assert( 0 );
}
for(i=0, k=sizeof(p)*2-1; i<sizeof(p)*2; i++, k--){
z[k] = zHex[n&0xf];
n >>= 4;
}
z[sizeof(p)*2] = 0;
}
static int hexToInt(int h){
if( h>='0' && h<='9' ){
return h - '0';
}else if( h>='a' && h<='f' ){
return h - 'a' + 10;
}else{
return -1;
}
}
static int textToPointer(const char *z, void **pp){
sqlite3_uint64 n = 0;
int i;
unsigned int u;
for(i=0; i<sizeof(void*)*2 && z[0]; i++){
int v;
v = hexToInt(*z++);
if( v<0 ) return TCL_ERROR;
n = n*16 + v;
}
if( *z!=0 ) return TCL_ERROR;
if( sizeof(n)==sizeof(*pp) ){
memcpy(pp, &n, sizeof(n));
}else if( sizeof(u)==sizeof(*pp) ){
u = (unsigned int)n;
memcpy(pp, &u, sizeof(u));
}else{
assert( 0 );
}
return TCL_OK;
}
/*
** Usage: sqlite3_malloc NBYTES
**
** Raw test interface for sqlite3_malloc().
*/
static int test_malloc(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
int nByte;
void *p;
char zOut[100];
if( objc!=2 ){
Tcl_WrongNumArgs(interp, 1, objv, "NBYTES");
return TCL_ERROR;
}
if( Tcl_GetIntFromObj(interp, objv[1], &nByte) ) return TCL_ERROR;
p = sqlite3_malloc((unsigned)nByte);
pointerToText(p, zOut);
Tcl_AppendResult(interp, zOut, NULL);
return TCL_OK;
}
/*
** Usage: sqlite3_realloc PRIOR NBYTES
**
** Raw test interface for sqlite3_realloc().
*/
static int test_realloc(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
int nByte;
void *pPrior, *p;
char zOut[100];
if( objc!=3 ){
Tcl_WrongNumArgs(interp, 1, objv, "PRIOR NBYTES");
return TCL_ERROR;
}
if( Tcl_GetIntFromObj(interp, objv[2], &nByte) ) return TCL_ERROR;
if( textToPointer(Tcl_GetString(objv[1]), &pPrior) ){
Tcl_AppendResult(interp, "bad pointer: ", Tcl_GetString(objv[1]), (char*)0);
return TCL_ERROR;
}
p = sqlite3_realloc(pPrior, (unsigned)nByte);
pointerToText(p, zOut);
Tcl_AppendResult(interp, zOut, NULL);
return TCL_OK;
}
/*
** Usage: sqlite3_free PRIOR
**
** Raw test interface for sqlite3_free().
*/
static int test_free(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
void *pPrior;
if( objc!=2 ){
Tcl_WrongNumArgs(interp, 1, objv, "PRIOR");
return TCL_ERROR;
}
if( textToPointer(Tcl_GetString(objv[1]), &pPrior) ){
Tcl_AppendResult(interp, "bad pointer: ", Tcl_GetString(objv[1]), (char*)0);
return TCL_ERROR;
}
sqlite3_free(pPrior);
return TCL_OK;
}
/*
** These routines are in test_hexio.c
*/
int sqlite3TestHexToBin(const char *, int, char *);
int sqlite3TestBinToHex(char*,int);
/*
** Usage: memset ADDRESS SIZE HEX
**
** Set a chunk of memory (obtained from malloc, probably) to a
** specified hex pattern.
*/
static int test_memset(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
void *p;
int size, n, i;
char *zHex;
char *zOut;
char zBin[100];
if( objc!=4 ){
Tcl_WrongNumArgs(interp, 1, objv, "ADDRESS SIZE HEX");
return TCL_ERROR;
}
if( textToPointer(Tcl_GetString(objv[1]), &p) ){
Tcl_AppendResult(interp, "bad pointer: ", Tcl_GetString(objv[1]), (char*)0);
return TCL_ERROR;
}
if( Tcl_GetIntFromObj(interp, objv[2], &size) ){
return TCL_ERROR;
}
if( size<=0 ){
Tcl_AppendResult(interp, "size must be positive", (char*)0);
return TCL_ERROR;
}
zHex = Tcl_GetStringFromObj(objv[3], &n);
if( n>sizeof(zBin)*2 ) n = sizeof(zBin)*2;
n = sqlite3TestHexToBin(zHex, n, zBin);
if( n==0 ){
Tcl_AppendResult(interp, "no data", (char*)0);
return TCL_ERROR;
}
zOut = p;
for(i=0; i<size; i++){
zOut[i] = zBin[i%n];
}
return TCL_OK;
}
/*
** Usage: memget ADDRESS SIZE
**
** Return memory as hexadecimal text.
*/
static int test_memget(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
void *p;
int size, n;
char *zBin;
char zHex[100];
if( objc!=3 ){
Tcl_WrongNumArgs(interp, 1, objv, "ADDRESS SIZE");
return TCL_ERROR;
}
if( textToPointer(Tcl_GetString(objv[1]), &p) ){
Tcl_AppendResult(interp, "bad pointer: ", Tcl_GetString(objv[1]), (char*)0);
return TCL_ERROR;
}
if( Tcl_GetIntFromObj(interp, objv[2], &size) ){
return TCL_ERROR;
}
if( size<=0 ){
Tcl_AppendResult(interp, "size must be positive", (char*)0);
return TCL_ERROR;
}
zBin = p;
while( size>0 ){
if( size>(sizeof(zHex)-1)/2 ){
n = (sizeof(zHex)-1)/2;
}else{
n = size;
}
memcpy(zHex, zBin, n);
zBin += n;
size -= n;
sqlite3TestBinToHex(zHex, n);
Tcl_AppendResult(interp, zHex, (char*)0);
}
return TCL_OK;
}
/*
** Usage: sqlite3_memory_used
**
** Raw test interface for sqlite3_memory_used().
*/
static int test_memory_used(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
Tcl_SetObjResult(interp, Tcl_NewWideIntObj(sqlite3_memory_used()));
return TCL_OK;
}
/*
** Usage: sqlite3_memory_highwater ?RESETFLAG?
**
** Raw test interface for sqlite3_memory_highwater().
*/
static int test_memory_highwater(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
int resetFlag = 0;
if( objc!=1 && objc!=2 ){
Tcl_WrongNumArgs(interp, 1, objv, "?RESET?");
return TCL_ERROR;
}
if( objc==2 ){
if( Tcl_GetBooleanFromObj(interp, objv[1], &resetFlag) ) return TCL_ERROR;
}
Tcl_SetObjResult(interp,
Tcl_NewWideIntObj(sqlite3_memory_highwater(resetFlag)));
return TCL_OK;
}
/*
** Usage: sqlite3_memdebug_backtrace DEPTH
**
** Set the depth of backtracing. If SQLITE_MEMDEBUG is not defined
** then this routine is a no-op.
*/
static int test_memdebug_backtrace(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
int depth;
if( objc!=2 ){
Tcl_WrongNumArgs(interp, 1, objv, "DEPT");
return TCL_ERROR;
}
if( Tcl_GetIntFromObj(interp, objv[1], &depth) ) return TCL_ERROR;
#ifdef SQLITE_MEMDEBUG
{
extern void sqlite3MemdebugBacktrace(int);
sqlite3MemdebugBacktrace(depth);
}
#endif
return TCL_OK;
}
/*
** Usage: sqlite3_memdebug_dump FILENAME
**
** Write a summary of unfreed memory to FILENAME.
*/
static int test_memdebug_dump(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
if( objc!=2 ){
Tcl_WrongNumArgs(interp, 1, objv, "FILENAME");
return TCL_ERROR;
}
#if defined(SQLITE_MEMDEBUG) || defined(SQLITE_MEMORY_SIZE) \
|| defined(SQLITE_POW2_MEMORY_SIZE)
{
extern void sqlite3MemdebugDump(const char*);
sqlite3MemdebugDump(Tcl_GetString(objv[1]));
}
#endif
return TCL_OK;
}
/*
** Usage: sqlite3_memdebug_malloc_count
**
** Return the total number of times malloc() has been called.
*/
static int test_memdebug_malloc_count(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
int nMalloc = -1;
if( objc!=1 ){
Tcl_WrongNumArgs(interp, 1, objv, "");
return TCL_ERROR;
}
#if defined(SQLITE_MEMDEBUG)
{
extern int sqlite3MemdebugMallocCount();
nMalloc = sqlite3MemdebugMallocCount();
}
#endif
Tcl_SetObjResult(interp, Tcl_NewIntObj(nMalloc));
return TCL_OK;
}
/*
** Usage: sqlite3_memdebug_fail COUNTER ?OPTIONS?
**
** where options are:
**
** -repeat <count>
** -benigncnt <varname>
**
** Arrange for a simulated malloc() failure after COUNTER successes.
** If a repeat count is specified, the fault is repeated that many
** times.
**
** Each call to this routine overrides the prior counter value.
** This routine returns the number of simulated failures that have
** happened since the previous call to this routine.
**
** To disable simulated failures, use a COUNTER of -1.
*/
static int test_memdebug_fail(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
int ii;
int iFail;
int nRepeat = 1;
Tcl_Obj *pBenignCnt = 0;
int nBenign;
int nFail = 0;
if( objc<2 ){
Tcl_WrongNumArgs(interp, 1, objv, "COUNTER ?OPTIONS?");
return TCL_ERROR;
}
if( Tcl_GetIntFromObj(interp, objv[1], &iFail) ) return TCL_ERROR;
for(ii=2; ii<objc; ii+=2){
int nOption;
char *zOption = Tcl_GetStringFromObj(objv[ii], &nOption);
char *zErr = 0;
if( nOption>1 && strncmp(zOption, "-repeat", nOption)==0 ){
if( ii==(objc-1) ){
zErr = "option requires an argument: ";
}else{
if( Tcl_GetIntFromObj(interp, objv[ii+1], &nRepeat) ){
return TCL_ERROR;
}
}
}else if( nOption>1 && strncmp(zOption, "-benigncnt", nOption)==0 ){
if( ii==(objc-1) ){
zErr = "option requires an argument: ";
}else{
pBenignCnt = objv[ii+1];
}
}else{
zErr = "unknown option: ";
}
if( zErr ){
Tcl_AppendResult(interp, zErr, zOption, 0);
return TCL_ERROR;
}
}
nBenign = faultsimBenignFailures();
nFail = faultsimFailures();
faultsimConfig(iFail, nRepeat);
if( pBenignCnt ){
Tcl_ObjSetVar2(interp, pBenignCnt, 0, Tcl_NewIntObj(nBenign), 0);
}
Tcl_SetObjResult(interp, Tcl_NewIntObj(nFail));
return TCL_OK;
}
/*
** Usage: sqlite3_memdebug_pending
**
** Return the number of malloc() calls that will succeed before a
** simulated failure occurs. A negative return value indicates that
** no malloc() failure is scheduled.
*/
static int test_memdebug_pending(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
int nPending;
if( objc!=1 ){
Tcl_WrongNumArgs(interp, 1, objv, "");
return TCL_ERROR;
}
nPending = faultsimPending();
Tcl_SetObjResult(interp, Tcl_NewIntObj(nPending));
return TCL_OK;
}
/*
** Usage: sqlite3_memdebug_settitle TITLE
**
** Set a title string stored with each allocation. The TITLE is
** typically the name of the test that was running when the
** allocation occurred. The TITLE is stored with the allocation
** and can be used to figure out which tests are leaking memory.
**
** Each title overwrite the previous.
*/
static int test_memdebug_settitle(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
if( objc!=2 ){
Tcl_WrongNumArgs(interp, 1, objv, "TITLE");
return TCL_ERROR;
}
#ifdef SQLITE_MEMDEBUG
{
const char *zTitle;
extern int sqlite3MemdebugSettitle(const char*);
zTitle = Tcl_GetString(objv[1]);
sqlite3MemdebugSettitle(zTitle);
}
#endif
return TCL_OK;
}
#define MALLOC_LOG_FRAMES 10
#define MALLOC_LOG_KEYINTS ( \
10 * ((sizeof(int)>=sizeof(void*)) ? 1 : sizeof(void*)/sizeof(int)) \
)
static Tcl_HashTable aMallocLog;
static int mallocLogEnabled = 0;
typedef struct MallocLog MallocLog;
struct MallocLog {
int nCall;
int nByte;
};
#ifdef SQLITE_MEMDEBUG
static void test_memdebug_callback(int nByte, int nFrame, void **aFrame){
if( mallocLogEnabled ){
MallocLog *pLog;
Tcl_HashEntry *pEntry;
int isNew;
int aKey[MALLOC_LOG_KEYINTS];
int nKey = sizeof(int)*MALLOC_LOG_KEYINTS;
memset(aKey, 0, nKey);
if( (sizeof(void*)*nFrame)<nKey ){
nKey = nFrame*sizeof(void*);
}
memcpy(aKey, aFrame, nKey);
pEntry = Tcl_CreateHashEntry(&aMallocLog, (const char *)aKey, &isNew);
if( isNew ){
pLog = (MallocLog *)Tcl_Alloc(sizeof(MallocLog));
memset(pLog, 0, sizeof(MallocLog));
Tcl_SetHashValue(pEntry, (ClientData)pLog);
}else{
pLog = (MallocLog *)Tcl_GetHashValue(pEntry);
}
pLog->nCall++;
pLog->nByte += nByte;
}
}
#endif /* SQLITE_MEMDEBUG */
static void test_memdebug_log_clear(void){
Tcl_HashSearch search;
Tcl_HashEntry *pEntry;
for(
pEntry=Tcl_FirstHashEntry(&aMallocLog, &search);
pEntry;
pEntry=Tcl_NextHashEntry(&search)
){
MallocLog *pLog = (MallocLog *)Tcl_GetHashValue(pEntry);
Tcl_Free((char *)pLog);
}
Tcl_DeleteHashTable(&aMallocLog);
Tcl_InitHashTable(&aMallocLog, MALLOC_LOG_KEYINTS);
}
static int test_memdebug_log(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
static int isInit = 0;
int iSub;
static const char *MB_strs[] = { "start", "stop", "dump", "clear", "sync" };
enum MB_enum {
MB_LOG_START, MB_LOG_STOP, MB_LOG_DUMP, MB_LOG_CLEAR, MB_LOG_SYNC
};
if( !isInit ){
#ifdef SQLITE_MEMDEBUG
extern void sqlite3MemdebugBacktraceCallback(
void (*xBacktrace)(int, int, void **));
sqlite3MemdebugBacktraceCallback(test_memdebug_callback);
#endif
Tcl_InitHashTable(&aMallocLog, MALLOC_LOG_KEYINTS);
isInit = 1;
}
if( objc<2 ){
Tcl_WrongNumArgs(interp, 1, objv, "SUB-COMMAND ...");
}
if( Tcl_GetIndexFromObj(interp, objv[1], MB_strs, "sub-command", 0, &iSub) ){
return TCL_ERROR;
}
switch( (enum MB_enum)iSub ){
case MB_LOG_START:
mallocLogEnabled = 1;
break;
case MB_LOG_STOP:
mallocLogEnabled = 0;
break;
case MB_LOG_DUMP: {
Tcl_HashSearch search;
Tcl_HashEntry *pEntry;
Tcl_Obj *pRet = Tcl_NewObj();
assert(sizeof(Tcl_WideInt)>=sizeof(void*));
for(
pEntry=Tcl_FirstHashEntry(&aMallocLog, &search);
pEntry;
pEntry=Tcl_NextHashEntry(&search)
){
Tcl_Obj *apElem[MALLOC_LOG_FRAMES+2];
MallocLog *pLog = (MallocLog *)Tcl_GetHashValue(pEntry);
Tcl_WideInt *aKey = (Tcl_WideInt *)Tcl_GetHashKey(&aMallocLog, pEntry);
int ii;
apElem[0] = Tcl_NewIntObj(pLog->nCall);
apElem[1] = Tcl_NewIntObj(pLog->nByte);
for(ii=0; ii<MALLOC_LOG_FRAMES; ii++){
apElem[ii+2] = Tcl_NewWideIntObj(aKey[ii]);
}
Tcl_ListObjAppendElement(interp, pRet,
Tcl_NewListObj(MALLOC_LOG_FRAMES+2, apElem)
);
}
Tcl_SetObjResult(interp, pRet);
break;
}
case MB_LOG_CLEAR: {
test_memdebug_log_clear();
break;
}
case MB_LOG_SYNC: {
#ifdef SQLITE_MEMDEBUG
extern void sqlite3MemdebugSync();
test_memdebug_log_clear();
mallocLogEnabled = 1;
sqlite3MemdebugSync();
#endif
break;
}
}
return TCL_OK;
}
/*
** Usage: sqlite3_config_scratch SIZE N
**
** Set the scratch memory buffer using SQLITE_CONFIG_SCRATCH.
** The buffer is static and is of limited size. N might be
** adjusted downward as needed to accomodate the requested size.
** The revised value of N is returned.
**
** A negative SIZE causes the buffer pointer to be NULL.
*/
static int test_config_scratch(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
int sz, N, rc;
Tcl_Obj *pResult;
static char *buf = 0;
if( objc!=3 ){
Tcl_WrongNumArgs(interp, 1, objv, "SIZE N");
return TCL_ERROR;
}
if( Tcl_GetIntFromObj(interp, objv[1], &sz) ) return TCL_ERROR;
if( Tcl_GetIntFromObj(interp, objv[2], &N) ) return TCL_ERROR;
free(buf);
if( sz<0 ){
buf = 0;
rc = sqlite3_config(SQLITE_CONFIG_SCRATCH, 0, 0, 0);
}else{
buf = malloc( sz*N + 1 );
rc = sqlite3_config(SQLITE_CONFIG_SCRATCH, buf, sz, N);
}
pResult = Tcl_NewObj();
Tcl_ListObjAppendElement(0, pResult, Tcl_NewIntObj(rc));
Tcl_ListObjAppendElement(0, pResult, Tcl_NewIntObj(N));
Tcl_SetObjResult(interp, pResult);
return TCL_OK;
}
/*
** Usage: sqlite3_config_pagecache SIZE N
**
** Set the page-cache memory buffer using SQLITE_CONFIG_PAGECACHE.
** The buffer is static and is of limited size. N might be
** adjusted downward as needed to accomodate the requested size.
** The revised value of N is returned.
**
** A negative SIZE causes the buffer pointer to be NULL.
*/
static int test_config_pagecache(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
int sz, N, rc;
Tcl_Obj *pResult;
static char *buf = 0;
if( objc!=3 ){
Tcl_WrongNumArgs(interp, 1, objv, "SIZE N");
return TCL_ERROR;
}
if( Tcl_GetIntFromObj(interp, objv[1], &sz) ) return TCL_ERROR;
if( Tcl_GetIntFromObj(interp, objv[2], &N) ) return TCL_ERROR;
free(buf);
if( sz<0 ){
buf = 0;
rc = sqlite3_config(SQLITE_CONFIG_PAGECACHE, 0, 0, 0);
}else{
buf = malloc( sz*N );
rc = sqlite3_config(SQLITE_CONFIG_PAGECACHE, buf, sz, N);
}
pResult = Tcl_NewObj();
Tcl_ListObjAppendElement(0, pResult, Tcl_NewIntObj(rc));
Tcl_ListObjAppendElement(0, pResult, Tcl_NewIntObj(N));
Tcl_SetObjResult(interp, pResult);
return TCL_OK;
}
/*
** Usage: sqlite3_config_alt_pcache INSTALL_FLAG DISCARD_CHANCE PRNG_SEED
**
** Set up the alternative test page cache. Install if INSTALL_FLAG is
** true and uninstall (reverting to the default page cache) if INSTALL_FLAG
** is false. DISCARD_CHANGE is an integer between 0 and 100 inclusive
** which determines the chance of discarding a page when unpinned. 100
** is certainty. 0 is never. PRNG_SEED is the pseudo-random number generator
** seed.
*/
static int test_alt_pcache(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
int installFlag;
int discardChance = 0;
int prngSeed = 0;
int highStress = 0;
extern void installTestPCache(int,unsigned,unsigned,unsigned);
if( objc<2 || objc>5 ){
Tcl_WrongNumArgs(interp, 1, objv,
"INSTALLFLAG DISCARDCHANCE PRNGSEEED HIGHSTRESS");
return TCL_ERROR;
}
if( Tcl_GetIntFromObj(interp, objv[1], &installFlag) ) return TCL_ERROR;
if( objc>=3 && Tcl_GetIntFromObj(interp, objv[2], &discardChance) ){
return TCL_ERROR;
}
if( objc>=4 && Tcl_GetIntFromObj(interp, objv[3], &prngSeed) ){
return TCL_ERROR;
}
if( objc>=5 && Tcl_GetIntFromObj(interp, objv[4], &highStress) ){
return TCL_ERROR;
}
if( discardChance<0 || discardChance>100 ){
Tcl_AppendResult(interp, "discard-chance should be between 0 and 100",
(char*)0);
return TCL_ERROR;
}
installTestPCache(installFlag, (unsigned)discardChance, (unsigned)prngSeed,
(unsigned)highStress);