我这里有这段代码，当我运行它时它可以正常工作，但最后它会从 strdup 函数中引发内存泄漏。 可以请教一下吗，我已经无计可施了。
我的代码
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <malloc.h>
void modify(const char *input, char *output) {
int lng = strlen(input);
for (int i = 0; i < lng - 1; ++i) {
output[i] = input[i];
}
}
typedef struct {
int index;
char *ticker;
float start;
float end;
int volume;
} Akcie;
void akcie_init(Akcie *akcie, int index, char *ticker, float start, float end, int volume) {
akcie->index = index;
akcie->ticker = ticker;
akcie->start = start;
akcie->end = end;
akcie->volume = volume;
}
int main(int argc, char **argv) {
Akcie *akcie;
char *com;
if (argc == 3) {
int cislo = atoi(argv[2]);
akcie = (Akcie *) malloc(cislo * sizeof(Akcie));
char buf[101];
char lo[100];
char *toto[5];
printf("<html>\n"
"<body>\n"
"<div>\n"
"</div>\n"
"<ul>\n");
for (int i = 0; i < cislo; ++i) {
fgets(buf, sizeof(buf), stdin);
modify(buf, lo);
com = strdup(lo);
int j = 0;
char *colo = strtok(com, ", ");
while (colo != NULL) {
toto[j] = colo;
colo = strtok(NULL, ", ");
j++;
}
akcie_init(&akcie[i], akcie[i].index = atoi(toto[0]), akcie[i].ticker = toto[1],
akcie[i].start = atof(toto[2]), akcie[i].end = atof(toto[3]), akcie[i].volume = atoi(toto[4]));
}
for (int l = cislo - 1; l >= 0; l--) {
printf("<li> Day: %d, ticker: %s start: %.2f, end: %.2f, volume: %d </li> \n", akcie[l].index,
akcie[l].ticker, akcie[l].start, akcie[l].end, akcie[l].volume);
}
free(com);
free(akcie);
printf("</ul>\n"
"</body>\n"
"</html>");
} else {
printf("Wrong parameters");
}
}
输出 + 内存泄漏
└─$ ./main AMC 10 <test-ticker-404.stdin
<html>
<body>
<div>
</div>
<ul>
<li> Day: 5, ticker: META start: 458.51, end: 462.19, volume: 328371639 </li>
<li> Day: 4, ticker: GOOGL start: 687.75, end: 690.60, volume: 84021759 </li>
<li> Day: 4, ticker: META start: 462.58, end: 458.51, volume: 536291890 </li>
<li> Day: 3, ticker: AAPL start: 408.75, end: 411.80, volume: 737451730 </li>
<li> Day: 3, ticker: GOOGL start: 687.98, end: 687.75, volume: 70074900 </li>
<li> Day: 3, ticker: META start: 461.47, end: 462.58, volume: 275445389 </li>
<li> Day: 2, ticker: AAPL start: 408.15, end: 408.75, volume: 475850689 </li>
<li> Day: 2, ticker: GOOGL start: 685.68, end: 687.98, volume: 91902769 </li>
<li> Day: 2, ticker: META start: 458.37, end: 461.47, volume: 19824825 </li>
<li> Day: 1, ticker: AAPL start: 403.28, end: 408.15, volume: 71579480 </li>
</ul>
</body>
=================================================================
==5879==ERROR: LeakSanitizer: detected memory leaks
Direct leak of 277 byte(s) in 9 object(s) allocated from:
#0 0x7f4b1487077b in __interceptor_strdup ../../../../src/libsanitizer/asan/asan_interceptors.cpp:439
#1 0x55dd86eca65b in main main.c:46
#2 0x7f4b14429209 (/lib/x86_64-linux-gnu/libc.so.6+0x29209)
SUMMARY: AddressSanitizer: 277 byte(s) leaked in 9 allocation(s).
我想保存每个股票中的 com，然后最后删除股票中所有这些 com 指标。或者甚至完全不同，不在堆上分配内存，而是将这些名称以静态数组的形式直接存储在共享中。但我不知道该怎么做。谢谢您的解决方案
最佳答案
当您在内循环中调用 com = strdup(lo); 但在外循环中仅调用 free 时，这是一个非常明显的泄漏。
内存泄漏最基本的规则:malloc/strdup调用次数必须与free调用次数匹配。
关于C-strdup内存泄漏，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/74488508/