我正在尝试对 valgrind 源代码进行一些实验。我使用下面的代码作为我的测试代码：
#include <stdio.h>
int g_int = 12;
int main()
{
int y = 10;
int x;
printf("%d\n",x);
return x;
}
我构建了一个名为“test.out”的可执行文件。然后我执行了以下命令：
$./valgrind --tool=memcheck ./test.out
在我的测试代码中，我有一个未初始化的错误，并且 valgrind通过给我一些消息来报告来自“ mc_errors.c ”的错误：
../build/bin$ ./valgrind --tool=memcheck --track-origins=yes --read-var-info=yes ./test >> outpur.txt
==24255== Memcheck, a memory error detector
==24255== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==24255== Using Valgrind-3.14.0.GIT and LibVEX; rerun with -h for copyright info
==24255== Command: ./test
==24255==
==24255== Conditional jump or move depends on uninitialised value(s)
==24255== I want to print my local variable here!
==24255== at 0x4E87B83: vfprintf (vfprintf.c:1631)
==24255== by 0x4E8F898: printf (printf.c:33)
==24255== by 0x400548: main (test.c:10)
==24255== Uninitialised value was created by a stack allocation
==24255== at 0x400526: main (test.c:6)
==24255==
==24255== Use of uninitialised value of size 8
==24255== I want to print my local variable here!
==24255== at 0x4E8476B: _itoa_word (_itoa.c:179)
==24255== by 0x4E8812C: vfprintf (vfprintf.c:1631)
==24255== by 0x4E8F898: printf (printf.c:33)
==24255== by 0x400548: main (test.c:10)
==24255== Uninitialised value was created by a stack allocation
==24255== at 0x400526: main (test.c:6)
==24255==
==24255== Conditional jump or move depends on uninitialised value(s)
==24255== I want to print my local variable here!
==24255== at 0x4E84775: _itoa_word (_itoa.c:179)
==24255== by 0x4E8812C: vfprintf (vfprintf.c:1631)
==24255== by 0x4E8F898: printf (printf.c:33)
==24255== by 0x400548: main (test.c:10)
==24255== Uninitialised value was created by a stack allocation
==24255== at 0x400526: main (test.c:6)
==24255==
==24255== Conditional jump or move depends on uninitialised value(s)
==24255== I want to print my local variable here!
==24255== at 0x4E881AF: vfprintf (vfprintf.c:1631)
==24255== by 0x4E8F898: printf (printf.c:33)
==24255== by 0x400548: main (test.c:10)
==24255== Uninitialised value was created by a stack allocation
==24255== at 0x400526: main (test.c:6)
==24255==
==24255== Conditional jump or move depends on uninitialised value(s)
==24255== I want to print my local variable here!
==24255== at 0x4E87C59: vfprintf (vfprintf.c:1631)
==24255== by 0x4E8F898: printf (printf.c:33)
==24255== by 0x400548: main (test.c:10)
==24255== Uninitialised value was created by a stack allocation
==24255== at 0x400526: main (test.c:6)
==24255==
==24255== Conditional jump or move depends on uninitialised value(s)
==24255== I want to print my local variable here!
==24255== at 0x4E8841A: vfprintf (vfprintf.c:1631)
==24255== by 0x4E8F898: printf (printf.c:33)
==24255== by 0x400548: main (test.c:10)
==24255== Uninitialised value was created by a stack allocation
==24255== at 0x400526: main (test.c:6)
==24255==
==24255== Conditional jump or move depends on uninitialised value(s)
==24255== I want to print my local variable here!
==24255== at 0x4E87CAB: vfprintf (vfprintf.c:1631)
==24255== by 0x4E8F898: printf (printf.c:33)
==24255== by 0x400548: main (test.c:10)
==24255== Uninitialised value was created by a stack allocation
==24255== at 0x400526: main (test.c:6)
==24255==
==24255== Conditional jump or move depends on uninitialised value(s)
==24255== I want to print my local variable here!
==24255== at 0x4E87CE2: vfprintf (vfprintf.c:1631)
==24255== by 0x4E8F898: printf (printf.c:33)
==24255== by 0x400548: main (test.c:10)
==24255== Uninitialised value was created by a stack allocation
==24255== at 0x400526: main (test.c:6)
==24255==
==24255==
==24255== HEAP SUMMARY:
==24255== in use at exit: 0 bytes in 0 blocks
==24255== total heap usage: 1 allocs, 1 frees, 4,096 bytes allocated
==24255==
==24255== All heap blocks were freed -- no leaks are possible
==24255==
==24255== For counts of detected and suppressed errors, rerun with: -v
==24255== ERROR SUMMARY: 8 errors from 8 contexts (suppressed: 0 from 0)
现在我想用来自 valgrind 的消息（错误报告）打印“ g_int ”和“ y ”的值。我已经在 valgrind 源打印中添加了一个打印输出：“我想在这里打印我的局部变量！” 是否有任何可能的方法可以使用任何内部 api 从 valgrind 源的用户源代码中读取变量的值？如果我可以从用户代码中获取所有变量名，那将是一个加号。