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| author | Mark Wielaard <mjw@redhat.com> | 2016-11-01 23:13:10 +0000 |
|---|---|---|
| committer | Mark Wielaard <mark@klomp.org> | 2016-11-18 11:06:17 +0100 |
| commit | aba19b625f34fb3d61263fe8044cf0c6d8804570 (patch) | |
| tree | 311997fa8a490166875f1ec52f43f600038d1520 /libiberty | |
| parent | 9d2cdc86574bda0f1013be8cdc166d86b6d032bc (diff) | |
| download | gdb-aba19b625f34fb3d61263fe8044cf0c6d8804570.zip gdb-aba19b625f34fb3d61263fe8044cf0c6d8804570.tar.gz gdb-aba19b625f34fb3d61263fe8044cf0c6d8804570.tar.bz2 | |
libiberty: Fix memory leak in ada_demangle when symbol cannot be demangled.
When a symbol cannot be demangled in ada_demangle a new demangled VEC
will be allocated without deleting the demangled VEC already in use.
Running testsuite/test-demangle under valgrind will show the leak for
this entry in testsuite/demangle-expected:
# Elaborated flag (not demangled)
--format=gnat
x_E
<x_E>
11 bytes in 1 blocks are definitely lost in loss record 1 of 1
at 0x4C27BE3: malloc (vg_replace_malloc.c:299)
by 0x413FE7: xmalloc (xmalloc.c:148)
by 0x4025EC: ada_demangle (cplus-dem.c:930)
by 0x402C59: cplus_demangle (cplus-dem.c:892)
by 0x400FEC: main (test-demangle.c:317)
libiberty/ChangeLog:
* cplus-dem.c (ada_demangle): Initialize demangled to NULL and
XDELETEVEC demangled when unknown.
Diffstat (limited to 'libiberty')
| -rw-r--r-- | libiberty/ChangeLog | 5 | ||||
| -rw-r--r-- | libiberty/cplus-dem.c | 3 |
2 files changed, 7 insertions, 1 deletions
diff --git a/libiberty/ChangeLog b/libiberty/ChangeLog index 0865428..5bd7715 100644 --- a/libiberty/ChangeLog +++ b/libiberty/ChangeLog @@ -1,3 +1,8 @@ +2016-10-31 Mark Wielaard <mjw@redhat.com> + + * cplus-dem.c (ada_demangle): Initialize demangled to NULL and + XDELETEVEC demangled when unknown. + 2016-10-17 Nick Clifton <nickc@redhat.com> * Sync with gcc. diff --git a/libiberty/cplus-dem.c b/libiberty/cplus-dem.c index f954050..7f63397 100644 --- a/libiberty/cplus-dem.c +++ b/libiberty/cplus-dem.c @@ -911,7 +911,7 @@ ada_demangle (const char *mangled, int option ATTRIBUTE_UNUSED) int len0; const char* p; char *d; - char *demangled; + char *demangled = NULL; /* Discard leading _ada_, which is used for library level subprograms. */ if (strncmp (mangled, "_ada_", 5) == 0) @@ -1156,6 +1156,7 @@ ada_demangle (const char *mangled, int option ATTRIBUTE_UNUSED) return demangled; unknown: + XDELETEVEC (demangled); len0 = strlen (mangled); demangled = XNEWVEC (char, len0 + 3); |