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Subject: Re: [Boost-users] [wave] assertion failed - multithread issue?
From: Ovanes Markarian (om_boost_at_[hidden])
Date: 2009-03-09 19:28:53
On Mon, Mar 9, 2009 at 11:21 PM, Hartmut Kaiser <hartmut.kaiser_at_[hidden]>wrote:
>
>
>
> Thanks! Will investigate.
> Regards Hartmut
>
>
Hello *,
I can also reproduce it on my WinXP (32bit) & MSVC 9 machine, but only when
no debugger is attached :( At least waiting with attached debugger (release
compiled build) for about 10 minutes did not cause this app to crash.
Last time I coded some C++ source parser with Wave (almost 2 years ago) it
worked fine in MT environment with pretty much heavy load, but that were
every time different files. What I found out for now is that wave::context
can't deal with std::string::const_iterator. Why? I get a compiler error. If
it uses non-const iterator, is it changing the string? Luckily making a
local copy of the file string in each thread causes the app to crash almost
immediately in the token_data::dtor. But just a question, is token_data only
wave::context related or is it used accross contexts?
My modified source:
#include <fstream>
#include <string>
//Wave does not like the new interface :(
//#define BOOST_FILESYSTEM_NO_DEPRECATED
#include <boost/thread.hpp>
#include <boost/wave.hpp>
#include <boost/wave/cpplexer/cpp_lex_token.hpp>
#include <boost/wave/cpplexer/cpp_lex_iterator.hpp>
const char* file_name="C:\\Program Files\\Microsoft
SDKs\\Windows\\v5.0\\Include\\Windows.h";
std::string file_contents()
{
std::ifstream instream(file_name);
return
std::string(std::istreambuf_iterator<char>(instream.rdbuf()),std::istreambuf_iterator<char>());
}
const std::string file=file_contents();
void test()
{
std::string local=file;
for(;;)
{
typedef boost::wave::cpplexer::lex_token<> token_type;
typedef boost::wave::cpplexer::lex_iterator<token_type>
lex_iterator_type;
typedef boost::wave::context<std::string::iterator,
lex_iterator_type> context_type;
context_type ctx (local.begin(), local.end(), file_name);
ctx.set_language(static_cast<boost::wave::language_support>(boost::wave::support_cpp|boost::wave::support_option_variadics|boost::wave::support_option_include_guard_detection));
ctx.add_sysinclude_path("C:\\Program Files\\Microsoft
SDKs\\Windows\\v5.0\\Include\\");
ctx.add_sysinclude_path("C:\\Program Files\\Microsoft Visual Studio
9.0\\VC\\include\\");
ctx.add_macro_definition("_CPPRTTI",true);
ctx.add_macro_definition("_CPPUNWIND",true);
ctx.add_macro_definition("_MT",true);
ctx.add_macro_definition("_MSC_VER=1600",true);
ctx.add_macro_definition("_M_IX86=600",true);
ctx.add_macro_definition("_WIN32=600",true);
context_type::iterator_type first = ctx.begin();
context_type::iterator_type last = ctx.end();
while (first != last)
{
++first;
}
}
}
int main()
{
for(int i=0;i<10;++i)
{
boost::thread t(test);
}
test();
}
Greetings,
Ovanes
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