Strange. It looks like it's inside the STL string implementation that
something is going wrong. Do you see a similar error if you simply allocate
a std::string on the stack and call its append() method?
On Mon, Jun 8, 2009 at 11:08 AM, kgs <kgo...@gmail.com> wrote:
>
> Yes, here you are:
>
> ===
> gdb) b malloc_error_break
> Breakpoint 1 at 0xe24a6
> (gdb) r
> Starting program: protobuf_test/test
> Reading symbols for shared libraries ++++.... done
> Breakpoint 1 at 0x93a154a9
> test(46757) malloc: *** error for object 0x36a674: Non-aligned pointer
> being freed
> *** set a breakpoint in malloc_error_break to debug
>
> Breakpoint 1, 0x93a154a9 in malloc_error_break ()
> (gdb) bt
> #0 0x93a154a9 in malloc_error_break ()
> #1 0x93a10497 in szone_error ()
> #2 0x9393a523 in szone_free ()
> #3 0x9393a38d in free ()
> #4 0x0034bf25 in operator delete ()
> #5 0x91f4802a in std::string::_Rep::_M_destroy ()
> #6 0x91f49aa5 in std::string::reserve ()
> #7 0x91f49baf in std::string::append ()
> #8 0x001e07c2 in google::protobuf::Message::AppendPartialToString ()
> #9 0x001e19fd in google::protobuf::Message::AppendToString ()
> #10 0x001e1c3a in google::protobuf::Message::SerializeToString ()
> #11 0x00004c9d in main ()
> (gdb) c
> Continuing.
> test(46757) malloc: *** error for object 0x36a674: Non-aligned pointer
> being freed
> *** set a breakpoint in malloc_error_break to debug
>
> Breakpoint 1, 0x93a154a9 in malloc_error_break ()
> (gdb) bt
> #0 0x93a154a9 in malloc_error_break ()
> #1 0x93a10497 in szone_error ()
> #2 0x9393a523 in szone_free ()
> #3 0x9393a38d in free ()
> #4 0x0034bf25 in operator delete ()
> #5 0x91f4802a in std::string::_Rep::_M_destroy ()
> #6 0x91f49aa5 in std::string::reserve ()
> #7 0x91f49baf in std::string::append ()
> #8 0x001f25e4 in google::protobuf::io::CodedInputStream::ReadString
> ()
> #9 0x00004acd in google::protobuf::internal::WireFormat::ReadString
> ()
> #10 0x0000356c in Person::MergePartialFromCodedStream ()
> #11 0x001e1f29 in google::protobuf::Message::MergeFromCodedStream ()
> #12 0x001e2061 in google::protobuf::Message::ParseFromCodedStream ()
> #13 0x001e20a8 in
> google::protobuf::Message::ParseFromBoundedZeroCopyStream ()
> #14 0x001e21c3 in google::protobuf::Message::ParseFromString ()
> #15 0x00004cba in main ()
> (gdb) c
> Continuing.
> test(46757) malloc: *** error for object 0x36a674: Non-aligned pointer
> being freed
> *** set a breakpoint in malloc_error_break to debug
>
> Breakpoint 1, 0x93a154a9 in malloc_error_break ()
> (gdb) bt
> #0 0x93a154a9 in malloc_error_break ()
> #1 0x93a10497 in szone_error ()
> #2 0x9393a523 in szone_free ()
> #3 0x9393a38d in free ()
> #4 0x0034bf25 in operator delete ()
> #5 0x91f4802a in std::string::_Rep::_M_destroy ()
> #6 0x91f49aa5 in std::string::reserve ()
> #7 0x91f49d21 in std::string::append ()
> #8 0x001f2624 in google::protobuf::io::CodedInputStream::ReadString
> ()
> #9 0x00004acd in google::protobuf::internal::WireFormat::ReadString
> ()
> #10 0x00003665 in Person::MergePartialFromCodedStream ()
> #11 0x001e1f29 in google::protobuf::Message::MergeFromCodedStream ()
> #12 0x001e2061 in google::protobuf::Message::ParseFromCodedStream ()
> #13 0x001e20a8 in
> google::protobuf::Message::ParseFromBoundedZeroCopyStream ()
> #14 0x001e21c3 in google::protobuf::Message::ParseFromString ()
> #15 0x00004cba in main ()
> (gdb) c
> Continuing.
> 123
> Bob
> b...@example.com
>
> Program exited normally.
> ===
>
> Thanks for feedback!
>
> Cheers,
> Kamil
>
> On 8 Cze, 18:19, Kenton Varda <ken...@google.com> wrote:
> > I haven't seen that before. Can you set a breakpoint in
> malloc_error_break
> > like the error suggests and get a stack trace?
> >
> >
> >
> > On Sun, Jun 7, 2009 at 4:23 AM, kgs <kgo...@gmail.com> wrote:
> >
> > > Hi,
> >
> > > I encountered a strange problem using protocol buffers on Mac OSX
> > > (Leopard).
> >
> > > My configuration is:
> > > - libprotoc 2.1.0 (from macports)
> > > - gcc (GCC) 4.3.2
> >
> > > 0. I wrote simple proto file (from examples on site):
> >
> > > == Person.proto ==
> > > message Person {
> > > required int32 id = 1;
> > > required string name = 2;
> > > optional string email = 3;
> > > }
> > > ====
> >
> > > 1. Next, I wrote simple test:
> >
> > > == test.cc ==
> > > #include <iostream>
> > > #include <string>
> >
> > > #include "Person.pb.h"
> >
> > > int main() {
> > > GOOGLE_PROTOBUF_VERIFY_VERSION;
> >
> > > Person person;
> > > person.set_id(123);
> > > person.set_name("Bob");
> > > person.set_email("b...@example.com");
> >
> > > std::string s;
> > > person.SerializeToString(&s);
> >
> > > Person tmp_person;
> > > tmp_person.ParseFromString(s);
> >
> > > std::cout << tmp_person.id() << std::endl
> > > << tmp_person.name() << std::endl
> > > << tmp_person.email() << std::endl;
> >
> > > google::protobuf::ShutdownProtobufLibrary();
> > > }
> > > =====
> >
> > > 3. Compilation:
> >
> > > g++ Person.pb.cc test.cc -lprotobuf -L/opt/local/lib -o test
> >
> > > 4. When I run this program, I get strange results:
> >
> > > ====
> > > test(1456) malloc: *** error for object 0x36a674: Non-aligned pointer
> > > being freed
> > > *** set a breakpoint in malloc_error_break to debug
> > > test(1456) malloc: *** error for object 0x36a674: Non-aligned pointer
> > > being freed
> > > *** set a breakpoint in malloc_error_break to debug
> > > test(1456) malloc: *** error for object 0x36a674: Non-aligned pointer
> > > being freed
> > > *** set a breakpoint in malloc_error_break to debug
> > > 123
> > > Bob
> > > b...@example.com
> > > ====
> >
> > > Running GDB (and looking at backtrace) shows me that there are some
> > > problems with SerializeToString and ParseFromString (2 of 3 errors
> > > above are from second function).
> >
> > > It seems that on linux there is no such a problem.
> > > Am I doing something wrong or there is a bug in library?
> >
> > > Cheers,
> > > Kamil
> >
>
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