study/uTools-Manuals
1
0
Fork 0
mirror of https://github.com/fofolee/uTools-Manuals.git synced 2026-03-03 19:47:13 +08:00
Code Issues Packages Projects Releases Wiki Activity

语法高亮，滚动条美化，设置页面调整

Browse Source
This commit is contained in:
fofolee
2019-04-19 02:41:09 +08:00
parent 1e8f76c000
commit 359d29ee0b
1590 changed files with 12328 additions and 11441 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
docs/linux/ltrace.html
View File

@@ -3,9 +3,9 @@
<h2 id="补充说明">补充说明</h2>
<p><strong>ltrace命令</strong> 是用来跟踪进程调用库函数的情况。</p>
<h3 id="语法">语法</h3>
<pre><code>ltrace [option ...] [command [arg ...]]</code></pre>
<pre><code class="language-bash">ltrace [option ...] [command [arg ...]]</code></pre>
<h3 id="选项">选项</h3>
<pre><code>-a 对齐具体某个列的返回值。
<pre><code class="language-bash">-a 对齐具体某个列的返回值。
-c 计算时间和调用，并在程序退出时打印摘要。
-C 解码低级别名称（内核级）为用户级名称。
-d 打印调试信息。
@@ -28,7 +28,7 @@
-x NAME treat the global NAME like a library subroutine.（求翻译）</code></pre>
<h3 id="实例">实例</h3>
<p>最基本应用，不带任何参数：</p>
<pre><code>[guest@localhost tmp]$ ltrace ./a.out
<pre><code class="language-bash">[guest@localhost tmp]$ ltrace ./a.out
__libc_start_main(0x80484aa, 1, 0xbfc07744, 0x8048550, 0x8048540 &lt;unfinished ...&gt;
printf(&quot;no1:%d \t no2:%d \t diff:%d\n&quot;, 10, 6, 4no1:10 no2:6 diff:4 ) = 24
printf(&quot;no1:%d \t no2:%d \t diff:%d\n&quot;, 9, 7, 2no1:9 no2:7 diff:2 ) = 23
@@ -36,7 +36,7 @@ printf(&quot;no1:%d \t no2:%d \t diff:%d\n&quot;, 8, 8, 0no1:8 no2:8 diff:0 ) =
--- SIGFPE (Floating point exception) ---
+++ killed by SIGFPE +++</code></pre>
<p>输出调用时间开销：</p>
<pre><code>[guest@localhost tmp]$ ltrace -T ./a.out
<pre><code class="language-bash">[guest@localhost tmp]$ ltrace -T ./a.out
__libc_start_main(0x80484aa, 1, 0xbf81d394, 0x8048550, 0x8048540 &lt;unfinished ...&gt;
printf(&quot;no1:%d \t no2:%d \t diff:%d\n&quot;, 10, 6, 4no1:10 no2:6 diff:4 ) = 24 &lt;0.000972&gt;
printf(&quot;no1:%d \t no2:%d \t diff:%d\n&quot;, 9, 7, 2no1:9 no2:7 diff:2 ) = 23 &lt;0.000155&gt;
@@ -44,7 +44,7 @@ printf(&quot;no1:%d \t no2:%d \t diff:%d\n&quot;, 8, 8, 0no1:8 no2:8 diff:0 ) =
--- SIGFPE (Floating point exception) ---
+++ killed by SIGFPE +++</code></pre>
<p>显示系统调用：</p>
<pre><code>[guest@localhost tmp]$ ltrace -S ./a.out
<pre><code class="language-bash">[guest@localhost tmp]$ ltrace -S ./a.out
SYS_brk(NULL) = 0x9e20000
SYS_access(0xa4710f, 4, 0xa4afc0, 0, 0xa4b644) = 0
SYS_open(&quot;/etc/ld.so.preload&quot;, 0, 02) = 3