我想弄清楚我的valgrind调试有什么问题。我正在慢慢地学习这个valgrind。Valgrind块肯定丢失在损失记录
调试:
==1701== HEAP SUMMARY:
==1701== in use at exit: 390 bytes in 12 blocks
==1701== total heap usage: 59 allocs, 47 frees, 1,097 bytes allocated
==1701==
==1701== 39 bytes in 1 blocks are definitely lost in loss record 6 of 12
==1701== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1701== by 0x401246: songToString (song.c:147)
==1701== by 0x40083C: main (songtest.c:52)
==1701==
代码(songToString功能):
char *songToString(const song *s)
{
char *sstr = NULL ;
char *st = NULL ;
char *sa = NULL ;
char *tt = NULL ;
int len = 0 ;
st = songGetTitle(s) ;
sa = songGetArtist(s) ;
// calculate the total string length needed.
len = strlen("Title: ") + strlen(st) +
strlen(" Artist: ") + strlen(sa) + 1 ;
if (NULL != s->lastPlayed)
{
tt = mtimeToString(s->lastPlayed) ;
len += strlen(" at ") + strlen(tt) ;
}
// allocate enough space for the song
sstr = malloc(len) ;
sprintf(sstr, "Title: %s Artist: %s", st, sa) ;
if (NULL != s->lastPlayed)
{
sstr = strcat(sstr, " at ") ;
sstr = strcat(sstr, tt) ;
}
free(sa) ;
free(st) ;
free(tt) ;
return sstr ;
}
在songToString,线147是sstr = malloc(len) ;
(线52):
char * sstr = songToString(song1) ;
任何帮助都会很棒。谢谢。
所以'免费(SSTR)'主要)? – user4127382 2014-10-09 23:18:00
@ user4127382对。当然,你必须确保在你使用它之后。 – o11c 2014-10-09 23:19:16