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openGauss-server/src/gausskernel/cbb/bbox/bbox_elf_dump_base.cpp

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/*
* Copyright (c) 2020 Huawei Technologies Co.,Ltd.
*
* openGauss is licensed under Mulan PSL v2.
* You can use this software according to the terms and conditions of the Mulan PSL v2.
* You may obtain a copy of Mulan PSL v2 at:
*
* http://license.coscl.org.cn/MulanPSL2
*
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
* See the Mulan PSL v2 for more details.
* -------------------------------------------------------------------------
*
* bbox_elf_dump_base.cpp
*
* IDENTIFICATION
* src/gausskernel/cbb/bbox/bbox_elf_dump_base.cpp
*
* -------------------------------------------------------------------------
*/
#include "bbox.h"
#include "bbox_elf_dump_base.h"
#include "bbox_syscall_support.h"
#include "../../src/include/securec.h"
#include "../../src/include/securec_check.h"
#ifdef __cplusplus
#if __cplusplus
extern "C" {
#endif
#endif /* __cplusplus */
/* black list of atomic variable */
BBOX_ATOMIC_STRU g_stLockBlackList = BBOX_ATOMIC_INIT(0);
/* the length of black list */
static int g_iNumBlackList = 0;
/* the lookup position of black list */
static int g_iPosBlackList = 0;
/* array store for black list */
static BBOX_BLACKLIST_STRU g_stBlackList[BBOX_BLACK_LIST_COUNT_MAX];
/*
function name: BBOX_DetermineMsb
description: The function should judge the mode that PC uses to store data is Big-endian/Little-endian.
arguments: void
return value: An integer that indicates the mode is Big-endian/Little-endian,
if it is ELFDATA2LSB, the mode is Little-endian,
if it is ELFDATA2MSB, the mode is Big-endian.
note：The way that this function judge the mode that PC uses to store data is through a union variable unProbe,
at first we give its first member variable sShortInt a value BBOX_MSB_LSB_INT of type short, then its second
member variable cSplit[sizeof(short)] equaling to cSplit[2] would have the equal value of the first. Finally we
just need to compare BBOX_LITTER_BITS and BBOX_HIGH_BITS, namely the low byte and high byte of
BBOX_MSB_LSB_INT, with unProbe.cSplit[0] and unProbe.cSplit[1], if they are correspondingly equal, the mode is
Little-endian, else is the Big-endian.
date: 2022/8/2
contact tel: 18720816902
*/
int BBOX_DetermineMsb(void)
{
union INT_PROBE {
short sShortInt;
char cSplit[sizeof(short)];
} unProbe;
unProbe.sShortInt = BBOX_MSB_LSB_INT;
if ((BBOX_LITTER_BITS == unProbe.cSplit[0]) && (BBOX_HIGH_BITS == unProbe.cSplit[1])) {
return ELFDATA2LSB;
} else {
return ELFDATA2MSB;
}
}
/*
* converts a string to time
* in : char *pSwitch - the string to be converted
* out : struct BBOX_ELF_TIMEVAL *pstElfTimeval - result
* return : RET_OK - success
* RET_ERR - failed
*/
int BBOX_StringToTime(const char* pSwitch, struct BBOX_ELF_TIMEVAL* pstElfTimeval)
{
int iSwitchTimes = 0;
if (NULL == pSwitch || NULL == pstElfTimeval) {
bbox_print(PRINT_ERR,
"BBOX_StringToTime parameters is invalid: pSwitch or pstElfTimeval is NULL.\n");
return RET_ERR;
}
/* converts a string to num */
while (*pSwitch && *pSwitch != ' ') {
iSwitchTimes = DECIMALISM_SPAN * iSwitchTimes + (*pSwitch) - '0';
pSwitch++;
}
pstElfTimeval->lTvSec = iSwitchTimes / SEC_CHANGE_MIRCO_SEC;
pstElfTimeval->lTvMicroSec = (iSwitchTimes % SEC_CHANGE_MIRCO_SEC) * SEC_CHANGE_MIRCO_SEC;
return RET_OK;
}
/*
* read a character from file
* in : struct BBOX_READ_FILE_IO *pstIO - bbox file pointer
* return : the character read in file - success
* RET_ERR - failed
*/
int BBOX_GetCharFromFile(struct BBOX_READ_FILE_IO* pstIO)
{
ssize_t iReadSize = -1;
if (NULL == pstIO) {
bbox_print(PRINT_ERR, "BBOX_GetCharFromFile parameters is invalid: pstIO is NULL.\n");
return RET_ERR;
}
unsigned char* pTempIO = pstIO->pData;
if (pTempIO == pstIO->pEnd) {
/* read character from file when the buffer is empty, and push it into buffer */
BBOX_NOINTR(iReadSize = sys_read(pstIO->iFd, pstIO->szBuff, sizeof(pstIO->szBuff)));
if (iReadSize <= 0) {
if (0 == iReadSize) {
errno = 0;
}
return RET_ERR;
}
pTempIO = &(pstIO->szBuff[0]);
pstIO->pEnd = &(pstIO->szBuff[iReadSize]);
}
pstIO->pData = pTempIO + 1;
return *pTempIO;
}
/*
* converts a string to num
* in : struct BBOX_READ_FILE_IO *pstIO - file to be read
* out : size_t *pAddress - buffer to store result
* return : the result num - success
* RET_ERR - failed
*/
int BBOX_StringSwitchInt(struct BBOX_READ_FILE_IO* pstIO, size_t* pAddress)
{
int iMappingTextChar = 0;
if (NULL == pstIO || NULL == pAddress) {
bbox_print(
PRINT_ERR, "BBOX_StringSwitchInt parameters is invalid: pstIO or pAddress is NULL.\n");
return RET_ERR;
}
*pAddress = 0;
iMappingTextChar = BBOX_GetCharFromFile(pstIO);
while (
(iMappingTextChar >= '0' && iMappingTextChar <= '9') || (iMappingTextChar >= 'a' && iMappingTextChar <= 'f')) {
/* left shift the variable, and add the num converted from character at the end. */
*pAddress =
(*pAddress << ONE_HEXA_DECIMAL_BITS) |
(unsigned int)(iMappingTextChar < 'A' ? iMappingTextChar - '0'
: ((unsigned int)iMappingTextChar & 0xF) + ASC2_CHAR_GREATER_NUM);
iMappingTextChar = BBOX_GetCharFromFile(pstIO); /* read next character */
}
return iMappingTextChar;
}
/*
* when read file /proc/self/maps, ignore unusefull information and skip to the end of line
* after we have geting all necessary information.
* return : count of character store into buffer - success
* RET_ERR - failed
*/
int BBOX_SkipToLineEnd(struct BBOX_READ_FILE_IO* pstReadIO)
{
int iGetChar = -1;
if (NULL == pstReadIO) {
bbox_print(PRINT_ERR, "BBOX_SkipToLineEnd parameters is invalid: pstReadIO is NULL.\n");
return RET_ERR;
}
do {
/* reads characters until the newline character */
iGetChar = BBOX_GetCharFromFile(pstReadIO);
if (RET_ERR == iGetChar) {
bbox_print(PRINT_ERR, "BBOX_SkipToLineEnd is failed, iGetChar= %d.\n", iGetChar);
return RET_ERR;
}
} while (iGetChar != '\n');
return RET_OK;
}
/*
* judge whether the range between *pStartAddress* and *pEndAddress* is in black list or not.
* If found, return the blacklist item which cover it, else return NULL.
*
* NOTE: this function is a thread-unsafe function since it works as an iterator.
*/
BBOX_BLACKLIST_STRU *_BBOX_FindAddrInBlackList(const void *pStartAddress, const void *pEndAddress)
{
int i = 0;
int iPerformance = 0;
size_t uiPageSize = sys_sysconf(_SC_PAGESIZE);
/* if the cursor reachs the end of blacklist, start a new trip. */
if (g_iPosBlackList >= g_iNumBlackList) {
g_iPosBlackList = 0;
}
for (i = g_iPosBlackList; i < g_iNumBlackList; i++) {
iPerformance++;
/*
* if the endAddress of segemnt is less than the startAddress of this item, it means there is
* no cross with the rest blacklist items since blacklist items are in increasing order.
*/
if (pEndAddress <= g_stBlackList[i].pBlackStartAddr) {
bbox_print(PRINT_DBG, "\nFIND BL BY %d TIMES, POS = %d.\n\n", iPerformance, g_iPosBlackList);
bbox_print(PRINT_DBG, "not find black list in segment.\n");
return NULL;
}
if (pStartAddress <= g_stBlackList[i].pBlackStartAddr &&
g_stBlackList[i].pBlackStartAddr < pEndAddress) {
g_iPosBlackList = i;
bbox_print(PRINT_DBG, "\nFIND BL BY %d TIMES, POS = %d.\n\n", iPerformance, g_iPosBlackList);
bbox_print(PRINT_DBG, "find black list in segment.\n");
return &(g_stBlackList[i]);
}
if (pStartAddress < g_stBlackList[i].pBlackEndAddr &&
g_stBlackList[i].pBlackEndAddr <= pEndAddress) {
if (((uintptr_t)pEndAddress - (uintptr_t)(g_stBlackList[i].pBlackEndAddr)) < uiPageSize) {
bbox_print(PRINT_DBG, "find black list in segment, but size < 4K, do not care return.\n");
return NULL;
} else {
g_iPosBlackList = i;
bbox_print(PRINT_DBG, "\nFIND BL BY %d TIMES, POS = %d.\n\n", iPerformance, g_iPosBlackList);
bbox_print(PRINT_DBG, "find black list in segment.\n");
return &(g_stBlackList[i]);
}
}
}
bbox_print(PRINT_DBG, "\nFIND BL BY %d TIMES, POS = %d.\n\n", iPerformance, g_iPosBlackList);
bbox_print(PRINT_DBG, "not find black list in segment.\n");
/* no cross between this segment and blacklist items. */
return NULL;
}
/*
* set a blaclist item to drop it from core file.
* void *pAddress : the head address of excluded memory
* unsigned long long uiLen : memory size
* return RET_OK if success else RET_ERR.
*/
int _BBOX_AddBlackListAddress(void* pAddress, unsigned long long uiLen)
{
unsigned int uiFound = 0;
if (pAddress == NULL || uiLen < BBOX_BLACK_LIST_MIN_LEN) {
bbox_print(PRINT_ERR, "parameter uiLen(%llu) is invaild.\n", uiLen);
return RET_ERR;
}
/* use atomic increment to control concurrency. */
while (BBOX_AtomicIncReturn(&g_stLockBlackList) > 1) {
BBOX_AtomicDec(&g_stLockBlackList);
bbox_print(PRINT_DBG, "add blacklist addr is running, waiting.\n");
sleep(1);
}
/* if too many blacklist items were added, return error while its upper limits reaches. */
if (g_iNumBlackList >= BBOX_BLACK_LIST_COUNT_MAX) {
BBOX_AtomicDec(&g_stLockBlackList);
bbox_print(PRINT_ERR, "blacklist addr total reach max, failed.\n");
return RET_ERR;
}
/*
* suppose that address became bigger and bigger, move forward from blacklist's tail,
* and find the proper postion to insert this address into the blacklist.
*/
for (int i = g_iNumBlackList - 1; i >= 0; i--) {
/* if try to add the same address again, report error. */
if (g_stBlackList[i].pBlackStartAddr == pAddress) {
BBOX_AtomicDec(&g_stLockBlackList);
if (g_stBlackList[i].uiLength == uiLen) {
return RET_OK;
}
bbox_print(PRINT_ERR, "add addr has in blacklist\n");
return RET_ERR;
}
if (g_stBlackList[i].pBlackStartAddr > pAddress) {
g_stBlackList[i+1].pBlackStartAddr = g_stBlackList[i].pBlackStartAddr;
g_stBlackList[i+1].pBlackEndAddr = g_stBlackList[i].pBlackEndAddr;
g_stBlackList[i+1].uiLength = g_stBlackList[i].uiLength;
} else {
g_stBlackList[i+1].pBlackStartAddr = pAddress;
g_stBlackList[i+1].uiLength = uiLen;
g_stBlackList[i+1].pBlackEndAddr= (void *)((char *)pAddress + uiLen);
uiFound = 1;
break;
}
}
/* if no found, it means this address is smaller than all，put it in the head. */
if (uiFound == 0) {
g_stBlackList[0].pBlackStartAddr = pAddress;
g_stBlackList[0].uiLength = uiLen;
g_stBlackList[0].pBlackEndAddr= (void *)((char *)pAddress + uiLen);
}
++g_iNumBlackList;
BBOX_AtomicDec(&g_stLockBlackList);
bbox_print(PRINT_DBG, "add blacklist addr successed, len = %llu.\n", uiLen);
return RET_OK;
}
/*
* drop a blaclist item to dump it in core file.
* void *pAddress : the head address of excluded memory
* return RET_OK if success else RET_ERR.
*/
int _BBOX_RmvBlackListAddress(void* pAddress)
{
unsigned int uiFound = 0;
if (pAddress == NULL) {
bbox_print(PRINT_ERR, "parameter pAddress is invaild.\n");
return RET_ERR;
}
/* use atomic increment to control concurrency. */
while (BBOX_AtomicIncReturn(&g_stLockBlackList) > 1) {
BBOX_AtomicDec(&g_stLockBlackList);
bbox_print(PRINT_DBG, "remove blacklist addr is running, waiting.\n");
sleep(1);
}
/* if blacklist is empty, return error. */
if (g_iNumBlackList == 0) {
BBOX_AtomicDec(&g_stLockBlackList);
bbox_print(PRINT_ERR, "blacklist addr total is zero, failed.\n");
return RET_ERR;
}
/* find the specified address and drop it from blacklist. */
for (int i = 0; i < g_iNumBlackList; i++) {
if (pAddress == g_stBlackList[i].pBlackStartAddr) {
uiFound = 1;
}
/* if found, move subsequent items a step forward. */
if (uiFound == 1) {
/* if it is the last, clear it and stop. */
if (i == (g_iNumBlackList - 1)) {
int rc = memset_s(&g_stBlackList[i], sizeof(g_stBlackList[0]), 0, sizeof(g_stBlackList[0]));
securec_check_c(rc, "\0", "\0");
break;
}
g_stBlackList[i].pBlackStartAddr = g_stBlackList[i+1].pBlackStartAddr;
g_stBlackList[i].pBlackEndAddr= g_stBlackList[i+1].pBlackEndAddr;
g_stBlackList[i].uiLength = g_stBlackList[i+1].uiLength;
}
}
if (uiFound == 0) {
BBOX_AtomicDec(&g_stLockBlackList);
bbox_print(PRINT_ERR, "remove addr not in blacklist, failed.\n");
return RET_ERR;
}
g_iNumBlackList--;
BBOX_AtomicDec(&g_stLockBlackList);
bbox_print(PRINT_DBG, "add blacklist addr successed.\n");
return RET_OK;
}
/*
* get status information of process
* in : char *pBuffer - buffer to store result
* unsigned int uiBufLen - buffer size
* return : count of character store into buffer - success
* RET_ERR - failed
*/
int BBOX_GetStatusInfo(char* pBuffer, unsigned int uiBufLen)
{
int iResult = 0;
int iStatFD = -1;
int iAllSize = 0;
int iReadSize = 0;
if (NULL == pBuffer) {
bbox_print(PRINT_ERR, "BBOX_GetStatusInfo parameters is invalid.\n");
return RET_ERR;
}
/* information title */
iResult = bbox_snprintf(pBuffer, uiBufLen, "\nSTATUS INFO\n--------------------------------------------\n");
if (iResult <= 0 || iResult > (int)uiBufLen) {
bbox_print(PRINT_ERR, "bbox_snprintf is failed, errno = %d.\n", errno);
return RET_ERR;
}
--iResult;
pBuffer += iResult;
uiBufLen -= iResult;
iAllSize += iResult;
/* open /proc/self/status */
BBOX_NOINTR(iStatFD = sys_open(BBOX_SELF_STATUS_PATH, O_RDONLY, 0));
if (iStatFD < 0) {
bbox_print(PRINT_ERR, "sys_open is failed, errno = %d.\n", errno);
return RET_ERR;
}
/* read /proc/self/status */
BBOX_NOINTR(iReadSize = sys_read(iStatFD, pBuffer, uiBufLen));
if (iReadSize < 0) {
(void)sys_close(iStatFD);
bbox_print(PRINT_ERR, "sys_read is failed, errno = %d.\n", errno);
return RET_ERR;
}
iAllSize += iReadSize;
(void)sys_close(iStatFD);
return iAllSize;
}
/*
* get status information of cpu
* in : char *pBuffer - buffer to store result
* unsigned int uiBufLen - buffer size
* return : count of character store into buffer - success
* RET_ERR - failed
*/
int BBOX_GetCpuInfo(char* pBuffer, unsigned int uiBufLen)
{
int iResult = 0;
int iStatFD = -1;
int iAllSize = 0;
int iReadSize = 0;
if (NULL == pBuffer) {
bbox_print(PRINT_ERR, "BBOX_GetCpuInfo parameters is invalid.\n");
return RET_ERR;
}
/* information title */
iResult = bbox_snprintf(pBuffer, uiBufLen, "\nCPU INFO\n--------------------------------------------\n");
if (iResult <= 0 || iResult > (int)uiBufLen) {
bbox_print(PRINT_ERR, "bbox_snprintf is failed, errno = %d.\n", errno);
return RET_ERR;
}
--iResult;
pBuffer += iResult;
uiBufLen -= iResult;
iAllSize += iResult;
/* open /proc/stat */
BBOX_NOINTR(iStatFD = sys_open(BBOX_PROC_INTER_PATH, O_RDONLY, 0));
if (iStatFD < 0) {
bbox_print(PRINT_ERR, "sys_open is failed, errno = %d.\n", errno);
return RET_ERR;
}
/* read /proc/stat */
BBOX_NOINTR(iReadSize = sys_read(iStatFD, pBuffer, uiBufLen));
if (iReadSize < 0) {
(void)sys_close(iStatFD);
bbox_print(PRINT_ERR, "sys_read is failed, errno = %d.\n", errno);
return RET_ERR;
}
iAllSize += iReadSize;
(void)sys_close(iStatFD);
return iAllSize;
}
/*
* get information of system internal storage
* in : char *pBuffer - buffer to store result
* unsigned int uiBufLen - buffer size
* return : count of character store into buffer - success
* RET_ERR - failed
*/
int BBOX_GetMemInfo(char* pBuffer, unsigned int uiBufLen)
{
int iResult = 0;
int iStatFD = -1;
int iAllSize = 0;
int iReadSize = 0;
if (NULL == pBuffer) {
bbox_print(PRINT_ERR, "BBOX_GetMemInfo parameters is invalid.\n");
return RET_ERR;
}
/* information title */
iResult = bbox_snprintf(pBuffer, uiBufLen, "\nMEM INFO\n--------------------------------------------\n");
if (iResult <= 0 || iResult > (int)uiBufLen) {
bbox_print(PRINT_ERR, "bbox_snprintf is failed, errno = %d.\n", errno);
return RET_ERR;
}
--iResult;
pBuffer += iResult;
uiBufLen -= iResult;
iAllSize += iResult;
/* open /proc/meminfo */
BBOX_NOINTR(iStatFD = sys_open(BBOX_PROC_MEMINFO_PATH, O_RDONLY, 0));
if (iStatFD < 0) {
bbox_print(PRINT_ERR, "sys_open is failed, iStatFD = %d.\n", iStatFD);
return RET_ERR;
}
/* read /proc/meminfo */
BBOX_NOINTR(iReadSize = sys_read(iStatFD, pBuffer, uiBufLen));
if (iReadSize < 0) {
(void)sys_close(iStatFD);
bbox_print(PRINT_ERR, "sys_read is failed, iReadSize = %d.\n", iReadSize);
return RET_ERR;
}
iAllSize += iReadSize;
(void)sys_close(iStatFD);
return iAllSize;
}
/*
* get information of ps command
* in : char *pBuffer - buffer to write result information
* : unsigned int uiBufLen - size of buffer
* return : success - count of characters written to the buffer
* failed - RET_ERR
*/
int BBOX_GetPsInfo(char* pBuffer, unsigned int uiBufLen)
{
int iResult = 0;
int iCommandFD = -1;
int iAllSize = 0;
int iReadSize = 0;
if (NULL == pBuffer) {
bbox_print(PRINT_ERR, "BBOX_GetPsInfo parameters is invalid.\n");
return RET_ERR;
}
/* information title */
iResult = bbox_snprintf(pBuffer, uiBufLen, "\nPROCESS INFO\n--------------------------------------------\n");
if (iResult <= 0 || iResult > (int)uiBufLen) {
bbox_print(PRINT_ERR, "bbox_snprintf is failed, errno = %d.\n", errno);
return RET_ERR;
}
--iResult;
pBuffer += iResult; /* calculate the start index of next part */
uiBufLen -= iResult; /* calculate free length */
iAllSize += iResult; /* counts the number of characters written to buffer */
/* run ps commend */
BBOX_NOINTR(iCommandFD = sys_popen(BBOX_PS_CMD, "r"));
if (iCommandFD < 0) {
bbox_print(PRINT_ERR, "sys_popen is failed, iStatFD = %d.\n", iCommandFD);
return RET_ERR;
}
/* read result of cpmmand ps */
BBOX_NOINTR(iReadSize = sys_read(iCommandFD, pBuffer, uiBufLen));
if (iReadSize < 0) {
(void)sys_pclose(iCommandFD);
bbox_print(PRINT_ERR, "sys_read is failed, iReadSize = %d.\n", iReadSize);
return RET_ERR;
}
iAllSize += iReadSize;
(void)sys_pclose(iCommandFD);
if (0 != iReadSize) {
pBuffer[iReadSize - 1] = '\0';
}
return iAllSize;
}
/*
*
* get running information of system
* in : char *pBuffer - the buffer to store information
* unsigned int uiBufLen - size of buffer
* return: success - count of characters written to the buffer
* failed - RET_ERR
*/
int _BBOX_GetAddonInfo(char* pBuffer, unsigned int uiBufLen)
{
int iResult = 0;
unsigned int uiAllStringSz = 0;
unsigned int uiLastLen = uiBufLen;
char* pBufPos = pBuffer;
errno_t rc = EOK;
rc = memset_s(pBuffer, uiBufLen, 0, uiBufLen);
securec_check_c(rc, "\0", "\0");
/* get status information of process */
iResult = BBOX_GetStatusInfo(pBufPos, uiLastLen);
if (iResult < 0) {
bbox_print(PRINT_ERR, "BBOX_GetStatusInfo is failed, iResult = %d.\n", iResult);
return RET_ERR;
}
/* get status information of cpu */
pBufPos += iResult; /* calculate the offset of next written */
uiLastLen -= iResult; /* calculate free length */
uiAllStringSz += iResult; /* counts the number of characters written to buffer */
iResult = BBOX_GetCpuInfo(pBufPos, uiLastLen);
if (iResult < 0) {
bbox_print(PRINT_ERR, "BBOX_GetCpuInfo is failed, iResult = %d.\n", iResult);
return RET_ERR;
}
/* get information of system internal storage */
pBufPos += iResult; /* calculate the offset of next written */
uiLastLen -= iResult; /* calculate free length */
uiAllStringSz += iResult; /* counts the number of characters written to buffer */
iResult = BBOX_GetMemInfo(pBufPos, uiLastLen);
if (iResult < 0) {
bbox_print(PRINT_ERR, "BBOX_GetMemInfo is failed, iResult = %d.\n", iResult);
return RET_ERR;
}
/* get status information of another process */
pBufPos += iResult; /* calculate the offset of next written */
uiLastLen -= iResult; /* calculate free length */
uiAllStringSz += iResult; /* counts the number of characters written to buffer */
iResult = BBOX_GetPsInfo(pBufPos, uiLastLen);
if (iResult < 0) {
bbox_print(PRINT_ERR, "BBOX_GetPSInfo is failed, iResult = %d.\n", iResult);
return RET_ERR;
}
uiAllStringSz += iResult; /* counts the number of characters written to buffer */
return uiAllStringSz;
}
#ifdef __cplusplus
#if __cplusplus
}
#endif
#endif /* __cplusplus */
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