我尝试在我的Mac上安装valgrind但是当我执行时./autogen.sh得到这个错误:
running: aclocal
./autogen.sh: line 6: aclocal: command not found
error: while running 'aclocal'
有谁知道如何解决这个问题？
这是SDL计划:
#include <SDL/SDL.h>
int main(int argc, char** argv){
SDL_Init(SDL_INIT_VIDEO);
SDL_Surface* screen = SDL_SetVideoMode(640, 480, 16, SDL_HWSURFACE);
SDL_Quit();
return 0;
}
用命令编译:
g++ -o test test.cpp -lSDL
这是valgrind的输出:
christian@christian-laptop:~/cpp/tetris$ valgrind --leak-check=full ./test
==3271== Memcheck, a memory error detector
==3271== Copyright (C) 2002-2009, and GNU GPL'd, by Julian Seward et al.
==3271== Using Valgrind-3.5.0-Debian and LibVEX; rerun with -h for copyright info
==3271== Command: ./test
==3271==
==3271==
==3271== HEAP SUMMARY:
==3271== in use at exit: 91,097 bytes in 1,258 blocks
==3271== total …Valgrind Invalid read of size 8在以下代码中报告错误.
我有一个声明的数组,
struct symbol *st[PARSER_HASH_SIZE];
当我的程序初始化时,此数组中的所有元素都被初始化为0.
memset(&st[0], 0, sizeof(st));
我的程序struct symbol根据哈希值创建实例并插入上面的数组.因此,此数组中的少数元素将为NULL,而其他元素将为有效值.
以下代码尝试删除分配的项目和valgrind抱怨行,
sym = st[i]; sym != NULL; sym = sym->next
struct symbol *sym = NULL;
/* cleaning the symbol table entries */
for(i = 0; i < PARSER_HASH_SIZE; i++) {
for(sym = st[i]; sym != NULL; sym = sym->next) { /* <-- Valgrind complains here */
free(sym);
}
}
我试图了解这个错误的原因.
任何帮助都会很棒!
我的应用需要动态调用图.我用callgrind工具(valgrind套件)运行它并得到callgrind.out.xxxxx文件.现在,我想对这些数据进行图形表示.KCacheGrind对我没什么帮助,因为它绘制了图形的有限部分(绘制~50个函数而不是〜1500个轮廓,我不知道如何修复它).如何获得将绘制所有函数的图形图像？
Valgrind不喜欢glibc 2.15:
checking the GLIBC_VERSION version... unsupported version 2.15
configure: error: Valgrind requires glibc version 2.2 - 2.14
我怎么处理这个？我是否必须降级glibc？我正在研究Ubuntu 12.04,如果这是相关的信息.
更新:
所以我试图从那里下载源代码并安装,而不是使用apt-get,因为我正在通过Learn C the Hard Way.在我遇到这个问题后,我使用apt-get来查看它是否可行.它为我安装了这个包:
libc6-dbg - Embedded GNU C Library: detached debugging symbols
我正在尝试更好地理解在c ++中分配在堆上的内存量.我写了一个小测试程序,除了填充一些2D矢量之外什么都没做.我在linux 64bit VM上运行它并使用valgrind的massif工具来分析内存.
我正在运行此测试的环境:在Win10上的VirtualBox中运行的Linux VM.VM配置:基本内存:5248MB,4CPU,上限为100%,磁盘类型VDI(动态分配存储).
c ++内存分析测试程序:
/**
* g++ -std=c++11 test.cpp -o test.o
*/
#include <string>
#include <vector>
#include <iostream>
using namespace std;
int main(int argc, char **arg) {
int n = stoi(arg[1]);
vector<vector<int> > matrix1(n);
vector<vector<int> > matrix2(n);
vector<vector<int> > matrix3(n);
vector<vector<int> > matrix4(n);
vector<vector<int> > matrix5(n);
vector<vector<int> > matrix6(n);
vector<vector<int> > matrix7(n);
vector<vector<int> > matrix8(n);
for (int i=0; i<n; ++i) {
for (int j=0; j<n; ++j) {
matrix1[i].push_back(j);
}
}
for (int i=0; i<n; ++i) { …我有一个剥离的二进制和符号文件.是否可以将符号添加回二进制文件并创建未提取的二进制文件.
我的用例是使用这个带w/valgrind的二进制文件.
每当我创建一个pthread时,valgrind就会输出内存泄漏,
例如下面的代码:
#include <stdio.h>
#include <unistd.h>
#include <pthread.h>
void *timer1_function (void *eit){
(void) eit;
printf("hello world\n");
pthread_exit(NULL);
}
int main(void){
pthread_t timer1;
pthread_create( &timer1, NULL, timer1_function, NULL); ///////line13
int i=0;
for(i=0;i<2;i++){usleep(1);}
return 0;
}
valgrind输出
==1395== HEAP SUMMARY:
==1395== in use at exit: 136 bytes in 1 blocks
==1395== total heap usage: 6 allocs, 5 frees, 1,134 bytes allocated
==1395==
==1395== 136 bytes in 1 blocks are possibly lost in loss record 1 of 1
==1395== at 0x402A629: calloc (in …我正在使用pthread库编写程序.当我用命令valgrind --leak-check = full运行我的程序时,我得到以下错误描述:
==11784==
==11784== **HEAP SUMMARY:**
==11784== in use at exit: 4,952 bytes in 18 blocks
==11784== total heap usage: 1,059 allocs, 1,041 frees, 51,864 bytes allocated
==11784==
==11784== **288 bytes** in 1 blocks are possibly lost in loss record 2 of 3
==11784== at 0x4C2380C: calloc (vg_replace_malloc.c:467)
==11784== by 0x4010D2E: _dl_allocate_tls (dl-tls.c:300)
==11784== by 0x55DC218: **pthread_create**@@GLIBC_2.2.5 (allocatestack.c:570)
==11784== by 0x401BC0: initdevice(char*) (in /a/fr-01/vol/home/stud/lim/workspace /Ex3/l)
==11784== by 0x406D05: main (in /a/fr-01/vol/home/stud/lim/workspace/Ex3/l)
==11784==
==11784== **4,608 bytes** in 16 blocks …我以某种方式破坏了内存,因为我的程序在随机位置崩溃而没有错误.
我正在使用valgrind --leak-check=full,编译-O0 -g,并且它检测到的第一个问题是第一行int main()
cout << "reading file" << endl;
同
==5089== Warning: client switching stacks? SP change: 0x7ff0004f8 --> 0x7feb7de10
==5089== to suppress, use: --max-stackframe=4728552 or greater
==5089== Invalid write of size 8
==5089== at 0x41E107: main (Dgn.cpp:2833)
==5089== Address 0x7feb7de08 is on thread 1's stack
它继续下去
==5089== Invalid read of size 8
==5089== at 0x5DE6E10: std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*) (in /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.18)
==5089== by 0x67AEDE4: (below main) (libc-start.c:260) …