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

[MacPorts]

#33745: Valgrind fails to show file/line of leak/error
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 Reporter:  clint.olsen@…          |       Owner:  macports-tickets@…                   
     Type:  defect                 |      Status:  new                                  
 Priority:  Normal                 |   Milestone:                                       
Component:  ports                  |     Version:  2.0.4                                
 Keywords:  valgrind, g++          |        Port:  valgrind                             
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 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.

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