linux c dump内存

# 设置内核参数允许生成Core Dump
ulimit -c unlimited

# 确保有足够的磁盘空间
df -h

# 更改Core Dump文件的存储位置和权限
echo "/var/crash/core.%e.%p" > /proc/sys/kernel/core_pattern
chmod 777 /var/crash

echo "100M" > /proc/sys/kernel/core_uses_pid

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

void dump_memory(const void *ptr, size_t size, const char *filename) {
    FILE *file = fopen(filename, "wb");
    if (file == NULL) {
        perror("Failed to open file for writing");
        return;
    }
    fwrite(ptr, 1, size, file);
    fclose(file);
}

int main() {
    int array[10] = {0};
    // 填充数组以便观察
    for (int i = 0; i < 10; ++i) {
        array[i] = i * 10;
    }
    // 手动Dump内存到文件
    dump_memory(array, sizeof(array), "memory_dump.bin");
    return 0;
}