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| author | Yao Qi <yao.qi@linaro.org> | 2017-08-09 12:39:16 +0100 |
|---|---|---|
| committer | Yao Qi <yao.qi@linaro.org> | 2017-08-09 12:39:16 +0100 |
| commit | e88e8651cf3415ba440ee17eb1b22b7d2e8368be (patch) | |
| tree | 0fc0fa9cc96a6a8588dca8b24ef2180e12e6c142 | |
| parent | f5a29eb0a6637abcafb1e54d53fae9bcaa6fbbd8 (diff) | |
| download | gdb-e88e8651cf3415ba440ee17eb1b22b7d2e8368be.zip gdb-e88e8651cf3415ba440ee17eb1b22b7d2e8368be.tar.gz gdb-e88e8651cf3415ba440ee17eb1b22b7d2e8368be.tar.bz2 | |
Fix memory leak in cp-support.c
The return value of cp_comp_to_string was never freed, creating a
sizable memory leak detectable with valgrind.
==21225== 8 bytes in 1 blocks are definitely lost in loss record 4,599 of 10,949^M
==21225== at 0x4C2DB8F: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)^M
==21225== by 0x4C2FDEF: realloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)^M
==21225== by 0x76CB31: d_growable_string_resize (cp-demangle.c:3963)^M
==21225== by 0x76CB31: d_growable_string_init (cp-demangle.c:3942)^M
==21225== by 0x76CB31: cplus_demangle_print (cp-demangle.c:4308)^M
==21225== by 0x4C9535: cp_comp_to_string(demangle_component*, int) (cp-name-parser.y:1972)^M
==21225== by 0x53E1D4: cp_canonicalize_string_full[abi:cxx11](char const*, char const* (*)(type*, void*), void*) (cp-support.c:530)^M
==21225== by 0x53E360: cp_canonicalize_string_no_typedefs[abi:cxx11](char const*) (cp-support.c:548)^M
==21225== by 0x5D51D2: find_linespec_symbols(linespec_state*, VEC_symtab_ptr*, char const*, VEC_symbolp**, VEC_bound_minimal_symbol_d**) (linespec.c:4030)^M
==21225== by 0x5D6CF6: linespec_parse_basic (linespec.c:1907)
==21279== 32 bytes in 1 blocks are definitely lost in loss record 6,066 of 10,947^M
==21279== at 0x4C2DB8F: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)^M
==21279== by 0x4C2FDEF: realloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)^M
==21279== by 0x76CB31: d_growable_string_resize (cp-demangle.c:3963)^M
==21279== by 0x76CB31: d_growable_string_init (cp-demangle.c:3942)^M
==21279== by 0x76CB31: cplus_demangle_print (cp-demangle.c:4308)^M
==21279== by 0x4C9535: cp_comp_to_string(demangle_component*, int) (cp-name-parser.y:1972)^M
==21279== by 0x53EF14: cp_canonicalize_string[abi:cxx11](char const*) (cp-support.c:569)^M
==21279== by 0x561B75: dwarf2_canonicalize_name(char const*, dwarf2_cu*, obstack*) [clone .isra.210] (dwarf2read.c:20159)
This patch fixes the leak. It is a regression by 2f408ecb.
gdb:
2017-08-09 Alex Lindsay <alexlindsay239@gmail.com>
Yao Qi <yao.qi@linaro.org>
* cp-support.c (cp_canonicalize_string_full): Use
gdb::unique_xmalloc_ptr<char>.
(cp_canonicalize_string): Likewise.
| -rw-r--r-- | gdb/ChangeLog | 7 | ||||
| -rw-r--r-- | gdb/cp-support.c | 13 |
2 files changed, 16 insertions, 4 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 97c39d7..209d0b6 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,10 @@ +2017-08-09 Alex Lindsay <alexlindsay239@gmail.com> + Yao Qi <yao.qi@linaro.org> + + * cp-support.c (cp_canonicalize_string_full): Use + gdb::unique_xmalloc_ptr<char>. + (cp_canonicalize_string): Likewise. + 2017-08-09 Yao Qi <yao.qi@linaro.org> * features/Makefile (WHICH): Remove i386/ non-linux stuff. diff --git a/gdb/cp-support.c b/gdb/cp-support.c index df9a563..f6557ab 100644 --- a/gdb/cp-support.c +++ b/gdb/cp-support.c @@ -527,9 +527,11 @@ cp_canonicalize_string_full (const char *string, replace_typedefs (info.get (), info->tree, finder, data); /* Convert the tree back into a string. */ - ret = cp_comp_to_string (info->tree, estimated_len); - gdb_assert (!ret.empty ()); + gdb::unique_xmalloc_ptr<char> us (cp_comp_to_string (info->tree, + estimated_len)); + gdb_assert (us); + ret = us.get (); /* Finally, compare the original string with the computed name, returning NULL if they are the same. */ if (ret == string) @@ -566,15 +568,18 @@ cp_canonicalize_string (const char *string) return std::string (); estimated_len = strlen (string) * 2; - std::string ret = cp_comp_to_string (info->tree, estimated_len); + gdb::unique_xmalloc_ptr<char> us (cp_comp_to_string (info->tree, + estimated_len)); - if (ret.empty ()) + if (!us) { warning (_("internal error: string \"%s\" failed to be canonicalized"), string); return std::string (); } + std::string ret (us.get ()); + if (ret == string) return std::string (); |