mem概述、mem的作用 在LwIP中,内存管理部分由mem.h、mem.c中实现,支持多种分配策略,比较灵活。支持运行时库自带的内存分配(MEM_LIBC_MALLOC),内存池分配(MEM_USE_POOLS),动态内存堆分配,这些分配策略可以通过宏定义来更改。在嵌入式系统里面,C运行时库自带的内存分配一般情况下很少用,更多的是后面二者。 mem的结...
void*mem_malloc(mem_size_tsize_in){mem_size_tptr,ptr2,size;structmem*mem,*mem2;#if LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXTu8_tlocal_mem_free_count=0;#endif/* LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT */LWIP_MEM_ALLOC_DECL_PROTECT();if(size_in==0){returnNULL;}/* Expand the size ...
于是,malloc函数请求延时,并开始在空闲链上翻箱倒柜地检查各内存片段,对它们进行整理,将相邻的小空闲块合并成较大的内存块。如果无法获得符合要求的内存块,malloc函数会返回NULL指针,因此在调用malloc动态申请内存块时,一定要进行返回值的判断。 Linux Libc6采用的机制是在free的时候试图整合相邻的碎片,使其合并成为一...
libc在初始化时会调用malloc_init_impl判断属性来加载libc_malloc_debug.so,调用InitMallocFunctions替换掉Libc原生的内存分配和释放函数。 malloc_comon.cpp static const char* DEBUG_SHARED_LIB = "libc_malloc_debug.so"; static const char* DEBUG_MALLOC_PROPERTY_OPTIONS = "libc.debug.malloc.options"; stati...
__libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x270b2) #3 0x5628a0b0e0ed in _start (/root/bad+0x10ed) 0x604000000038 is located 0 bytes to the right of 40-byte region [0x604000000010,0x604000000038) allocated by thread T0 here: #0 0x7feaf16d4bc8 in malloc (/lib/x86_...
Search or jump to... Search code, repositories, users, issues, pull requests... Provide feedback We read every piece of feedback, and take your input very seriously. Include my email address so I can be contacted Cancel Submit feedback Saved searches Use saved searches to filter your...
(mode: change) Change: ec260000(9964) -> 01000000(1) ([anon:libc_malloc]) Dump: dc71ab88-dc71abac (36 byte, [anon:libc_malloc]) dc71ab88 70ab 58de 70ab 58de 74ab 58de 00f1 4dde p.X.p.X.t.X...M. dc71ab98 0100 0000 c201 0000 c201 0000 d900 0000 ... dc71aba8 0000...
对于用户态的常用内存分配函数,如 malloc 和 calloc 等, memleak 利用了用户态探测(uprobe)技术来实现监控。uprobe 是一种用于用户空间应用程序的动态追踪技术,它可以在运行时不修改二进制文件的情况下在任意位置设置断点,从而实现对特定函数调用的追踪。
( _CRT_ASSERT, _CRTDBG_FILE_STDOUT ); // Allocate 2 memory blocks and store a string in each p1 = malloc( 34 ); strcpy( p1, "This is the p1 string (34 bytes)." ); p2 = malloc( 34 ); strcpy( p2, "This is the p2 string (34 bytes)." ); OutputHeading( "Use _ASSERTE ...
*/void*mem_malloc(mem_size_tsize){void* ret = mem_clib_malloc(size + MEM_LIBC_STATSHELPER_SIZE);if(ret ==NULL) { MEM_STATS_INC(err); }else{ LWIP_ASSERT("malloc() must return aligned memory",LWIP_MEM_ALIGN(ret) == ret);#ifLWIP_STATS && MEM_STATS*(mem_size_t*)ret = size...