[MacPorts] #33745: Valgrind fails to show file/line of leak/error

[MacPorts]

#33745: Valgrind fails to show file/line of leak/error
-----------------------------------+----------------------------------------
 Reporter:  clint.olsen@…          |       Owner:  raimue@…           
     Type:  defect                 |      Status:  new                
 Priority:  Normal                 |   Milestone:                     
Component:  ports                  |     Version:  2.0.4              
 Keywords:                         |        Port:  valgrind           
-----------------------------------+----------------------------------------
Changes (by cal@…):

  * keywords:  valgrind, g++ =>
  * owner:  macports-tickets@… => raimue@…
 * cc: cal@… (added)


Old description:

> I have a small piece of C++ software that demonstrates leaks, but for
> whatever reason I cannot coax the file and line numbers. I used
> /usr/bin/g++ -g -W -Wall to compile every source. Some sources were
> generated by flex and bison, but otherwise it's just straightforward C++.
>
> ==985== 96 bytes in 4 blocks are definitely lost in loss record 13 of 22
> ==985==    at 0xB823: malloc (vg_replace_malloc.c:266)
> ==985==    by 0x5768D: operator new(unsigned long) (in
> /usr/lib/libstdc++.6.0.9.dylib)
> ==985==    by 0x100003BB5: yylex(YYSTYPE*, void*) (in ./re)
> ==985==    by 0x1000016C7: yyparse(Parser*, void*) (in ./re)
> ==985==    by 0x10000291C: main (in ./re)
>
> I attempted to reproduce with the following piece of C++ code, but it
> works. So, there's some difference between the two cases:
>
> $ cat leak.cpp
> class Foo {
>     const char *name;
>     int    age;
>
>     public:
>
>     Foo(const char *name_, int age_) : name(name_), age(age_) {};
>
> };
>
> int main(int argc, char *argv[])
> {
>
>     Foo *foo = new Foo("foo", 1);
>
>     foo = new Foo("bar", 2);
>
>     return 0;
> }
> $ g++ -W -Wall -g -o leak leak.cpp
> leak.cpp:11: warning: unused parameter ‘argc’
> leak.cpp:11: warning: unused parameter ‘argv’
>
> $ valgrind --leak-check=full ./leak
> ==1299== Memcheck, a memory error detector
> ==1299== Copyright (C) 2002-2011, and GNU GPL'd, by Julian Seward et al.
> ==1299== Using Valgrind-3.7.0 and LibVEX; rerun with -h for copyright
> info
> ==1299== Command: ./leak
> ==1299==
> ==1299==
> ==1299== HEAP SUMMARY:
> ==1299==     in use at exit: 2,229 bytes in 34 blocks
> ==1299==   total heap usage: 34 allocs, 0 frees, 2,229 bytes allocated
> ==1299==
> ==1299== 16 bytes in 1 blocks are definitely lost in loss record 2 of 10
> ==1299==    at 0xB823: malloc (vg_replace_malloc.c:266)
> ==1299==    by 0x5768D: operator new(unsigned long) (in
> /usr/lib/libstdc++.6.0.9.dylib)
> ==1299==    by 0x100000E56: main (leak.cpp:14)
> ...
>
> Any suggestions you may have would be much appreciated.

New description:

 I have a small piece of C++ software that demonstrates leaks, but for
 whatever reason I cannot coax the file and line numbers. I used
 /usr/bin/g++ -g -W -Wall to compile every source. Some sources were
 generated by flex and bison, but otherwise it's just straightforward C++.

 {{{
 ==985== 96 bytes in 4 blocks are definitely lost in loss record 13 of 22
 ==985==    at 0xB823: malloc (vg_replace_malloc.c:266)
 ==985==    by 0x5768D: operator new(unsigned long) (in
 /usr/lib/libstdc++.6.0.9.dylib)
 ==985==    by 0x100003BB5: yylex(YYSTYPE*, void*) (in ./re)
 ==985==    by 0x1000016C7: yyparse(Parser*, void*) (in ./re)
 ==985==    by 0x10000291C: main (in ./re)
 }}}

 I attempted to reproduce with the following piece of C++ code, but it
 works. So, there's some difference between the two cases:

 {{{
 $ cat leak.cpp
 class Foo {
     const char *name;
     int    age;

     public:

     Foo(const char *name_, int age_) : name(name_), age(age_) {};

 };

 int main(int argc, char *argv[])
 {

     Foo *foo = new Foo("foo", 1);

     foo = new Foo("bar", 2);

     return 0;
 }
 $ g++ -W -Wall -g -o leak leak.cpp
 leak.cpp:11: warning: unused parameter ‘argc’
 leak.cpp:11: warning: unused parameter ‘argv’

 $ valgrind --leak-check=full ./leak
 ==1299== Memcheck, a memory error detector
 ==1299== Copyright (C) 2002-2011, and GNU GPL'd, by Julian Seward et al.
 ==1299== Using Valgrind-3.7.0 and LibVEX; rerun with -h for copyright info
 ==1299== Command: ./leak
 ==1299==
 ==1299==
 ==1299== HEAP SUMMARY:
 ==1299==     in use at exit: 2,229 bytes in 34 blocks
 ==1299==   total heap usage: 34 allocs, 0 frees, 2,229 bytes allocated
 ==1299==
 ==1299== 16 bytes in 1 blocks are definitely lost in loss record 2 of 10
 ==1299==    at 0xB823: malloc (vg_replace_malloc.c:266)
 ==1299==    by 0x5768D: operator new(unsigned long) (in
 /usr/lib/libstdc++.6.0.9.dylib)
 ==1299==    by 0x100000E56: main (leak.cpp:14)
 ...
 }}}

 Any suggestions you may have would be much appreciated.

--

Comment:

 Please use WikiFormatting and remember to Cc the maintainer.

 Is there a `re.dSYM` directory next to the `re` binary? Does dwarfdump
 `re.dSYM` list the source code and debug symbols?

-- 
Ticket URL: <https://trac.macports.org/ticket/33745#comment:1>
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