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< / div > < div class = "- topic/body body" > < section class = "- topic/section section" id = "id__id2" data-ofbid = "id__id2" > < h2 class = "- topic/title title sectiontitle" > 内存泄漏问题< / h2 >
< p class = "- topic/p p" data-ofbid = "d343297e24__20250121172117" > 内存泄漏问题的定位分为以下两步：< / p >
< ol class = "- topic/ol ol" id = "id__ol_xzr_rz5_hdc" data-ofbid = "id__ol_xzr_rz5_hdc" > < li class = "- topic/li li" data-ofbid = "d343297e28__20250121172117" >
< div class = "- topic/p p" data-ofbid = "d343297e30__20250121172117" > 查看总内存大小，确认 Free
内存是否一直在减小：< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "id__codeblock_vyp_msj_bdc" data-ofbid = "id__codeblock_vyp_msj_bdc" > free< / pre > < pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "id__codeblock_qhy_dfk_5dc" data-ofbid = "id__codeblock_qhy_dfk_5dc" > memheap pool size max used size available size
---------------- ---------- ------------- --------------
heap_cma < span class = "hl-number" > 8322232< / span > < span class = "hl-number" > 6005296< / span > < span class = "hl-number" > 3898528< / span > < em class = "hl-comment" > // available size 表示的是 Free 内存的大小< / em >
heap_sys < span class = "hl-number" > 343560< / span > < span class = "hl-number" > 97084< / span > < span class = "hl-number" > 261700< / span > < / pre > < / div >
< p class = "- topic/p p" data-ofbid = "d343297e37__20250121172117" > 如果确认总内存大小一直在增加，则进行下一步。< / p >
< / li > < li class = "- topic/li li" data-ofbid = "d343297e40__20250121172117" >
< div class = "- topic/p p" data-ofbid = "d343297e42__20250121172117" > 通过 RT-Thread 提供的 < span class = "+ topic/keyword sw-d/cmdname keyword cmdname" > memheaptrace< / span > 命令，查看内存的具体使用情况。
< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "id__codeblock_f5w_msj_bdc" data-ofbid = "id__codeblock_f5w_msj_bdc" > memheaptrace< / pre > < pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "id__codeblock_lmh_2fk_5dc" data-ofbid = "id__codeblock_lmh_2fk_5dc" > memory heap address:
name : heap_cma
heap_ptr: < span class = "hl-number" > 0x40010368< / span >
free : < span class = "hl-number" > 0x0036d098< / span >
max_used: < span class = "hl-number" > 0x00586510< / span >
size : < span class = "hl-number" > 0x007efc98< / span >
--memory used information --
[< span class = "hl-number" > 0x40010368< / span > - < span class = "hl-number" > 2< / span > M] main < em class = "hl-comment" > // 该段内存被 main 进程使用< / em >
[< span class = "hl-number" > 0x402683a4< / span > - < span class = "hl-number" > 2< / span > K] main
[< span class = "hl-number" > 0x40268bc0< / span > - < span class = "hl-number" > 16< / span > K] main
[< span class = "hl-number" > 0x4026cc7c< / span > - < span class = "hl-number" > 359< / span > K] < em class = "hl-comment" > // 空白的表示，该段内存是 Free 状态< / em >
[< span class = "hl-number" > 0x402c6a54< / span > - < span class = "hl-number" > 1< / span > M] LVGL < em class = "hl-comment" > // 该段内存被 LVGL 进程使用< / em >
[< span class = "hl-number" > 0x403f6e70< / span > - < span class = "hl-number" > 5< / span > K] LVGL
[< span class = "hl-number" > 0x403f854c< / span > - < span class = "hl-number" > 109< / span > K] LVGL
[< span class = "hl-number" > 0x40413968< / span > - < span class = "hl-number" > 213< / span > K]
[< span class = "hl-number" > 0x40449028< / span > - < span class = "hl-number" > 13< / span > K] LVGL
[< span class = "hl-number" > 0x4044c804< / span > - < span class = "hl-number" > 4< / span > K] LVGL
[< span class = "hl-number" > 0x4044d9a0< / span > - < span class = "hl-number" > 13< / span > K] LVGL
[< span class = "hl-number" > 0x4045103c< / span > - < span class = "hl-number" > 46< / span > K] LVGL
[< span class = "hl-number" > 0x4045c998< / span > - < span class = "hl-number" > 1< / span > M]
[< span class = "hl-number" > 0x406164f8< / span > - < span class = "hl-number" > 590< / span > K] LVGL
[< span class = "hl-number" > 0x406a9e34< / span > - < span class = "hl-number" > 1< / span > M]< / pre > < / div >
< / li > < li class = "- topic/li li" data-ofbid = "d343297e52__20250121172117" >
< p class = "- topic/p p" data-ofbid = "d343297e54__20250121172117" > 通过命令的结果，可以具体分析出哪些内存占用了没有释放。< / p >
< div class = "- topic/p p" data-ofbid = "d343297e59__20250121172117" > < span class = "+ topic/keyword sw-d/cmdname keyword cmdname" > memheaptrace< / span > 命令需要在 < code class = "+ topic/ph pr-d/codeph ph codeph" > menuconfig< / code >
配置菜单中使能：< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "id__codeblock_sb2_nsj_bdc" data-ofbid = "id__codeblock_sb2_nsj_bdc" > Rt-Thread options --->
RT-Thread Kernel --->
Memory Management --->
[*] Enable memory trace< / pre > < / div >
< / li > < / ol >
< / section > < section class = "- topic/section section" id = "id__id3" data-ofbid = "id__id3" > < h2 class = "- topic/title title sectiontitle" > 踩内存问题< / h2 >
< div class = "- topic/p p" data-ofbid = "d343297e76__20250121172117" > 踩内存问题如果查看到固定的地址被踩，可以通过 JTAG 调试器连接上 CPU，
功能来侦测对内存地址的异常访问：< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "id__codeblock_c3k_nsj_bdc" data-ofbid = "id__codeblock_c3k_nsj_bdc" > (gdb) p & _console_device-> rx_indicate
$< span class = "hl-number" > 3< / span > = (rt_err_t (**)(rt_device_t, rt_size_t)) < span class = "hl-number" > 0x40002164< / span > < serial+< span class = "hl-number" > 40< / span > >
(gdb) watch *< span class = "hl-number" > 0x40002164< / span > < em class = "hl-comment" > // (1) 设置 watch 断点< / em >
Hardware watchpoint < span class = "hl-number" > 1< / span > : *< span class = "hl-number" > 0x40002164< / span >
(gdb) c < em class = "hl-comment" > // (2) 继续运行，等待异常触发< / em >
Breakpoint < span class = "hl-number" > 1< / span > , xxxx < em class = "hl-comment" > // (3) 异常访问触发 watchpoint 断点< / em >
(gdb) bt < em class = "hl-comment" > // (4) 查看触发异常的调用栈< / em > < / pre > < / div >
< / section > < / div > < / article > < / main > < / div >
< / div >
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< div class = " wh_topic_toc " > < div class = "wh_topic_label" > 在本页上< / div > < ul > < li class = "section-item" > < div class = "section-title" > < a href = "#id__id2" data-tocid = "id__id2" > 内存泄漏问题< / a > < / div > < / li > < li class = "section-item" > < div class = "section-title" > < a href = "#id__id3" data-tocid = "id__id3" > 踩内存问题< / a > < / div > < / li > < / ul > < / div >
< / div >
< / nav >
< / div >
< / div >
< / div >
< footer class = "navbar navbar-default wh_footer" >
< div class = " footer-container mx-auto " >
< title > footer def< / title >
< style > < ! - -
.p1 {
font-family: FangZhengShuSong, Times, serif;
}
.p2 {
font-family: Arial, Helvetica, sans-serif;
}
.p3 {
font-family: "Lucida Console", "Courier New", monospace;
}
-->< / style >
< div class = "webhelp.fragment.footer" >
< p class = "p1" > Copyright © 2019-2024 广东匠芯创科技有限公司. All rights reserved.< / p >
< / div > < div >
< div class = "generation_time" >
Update Time: 2025-01-21
< / div >
< / div >
< / div >
< / footer >
< div id = "go2top" class = "d-print-none" >
< span class = "oxy-icon oxy-icon-up" > < / span >
< / div >
< div id = "modal_img_large" class = "modal" >
< span class = "close oxy-icon oxy-icon-remove" > < / span >
< div id = "modal_img_container" > < / div >
< div id = "caption" > < / div >
< / div >
< script src = "${pd}/publishing/publishing-styles-AIC-template/js/custom.js" defer = "defer" > < / script >
< / body >
2025-01-23 16:37:00 +08:00
< / html >
