Your message dated Mon, 04 Jan 2010 14:50:31 +0100 with message-id <[email protected]> and subject line Re: g++: std::basic_filebuf::pubseekoff works incorrect on amd64 has caused the Debian Bug report #377210, regarding g++: std::basic_filebuf::pubseekoff works incorrect on amd64 to be marked as done.
This means that you claim that the problem has been dealt with. If this is not the case it is now your responsibility to reopen the Bug report if necessary, and/or fix the problem forthwith. (NB: If you are a system administrator and have no idea what this message is talking about, this may indicate a serious mail system misconfiguration somewhere. Please contact [email protected] immediately.) -- 377210: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=377210 Debian Bug Tracking System Contact [email protected] with problems
--- Begin Message ---Package: g++ Version: 4.0.3-3 , 4.1.1-5 I use stdio_filebuf for handling socket on in|out directions. If after first read i use write (or after first write use read) socket crashes. To prevent failure i use pubseekoff which fixes error. It works great on i386 but not on amd64. Same happens on g++ versions 4.0.3 and 4.1.1. Below is 2 examples: http.c(write,read) and ftp.c(read,write). Compiling command: g++ http.c ; g++ ftp.c kernel: 2.6.16-2-em64t (2.6.16-2-686 on i386), libc6: 2.3.6.15 /// http.c /// #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <unistd.h> #include <string> #include <iostream> #include <ext/stdio_filebuf.h> int main() { int sockfd = socket(AF_INET, SOCK_STREAM, 0); sockaddr_in address; address.sin_family = AF_INET; address.sin_addr.s_addr = inet_addr("127.0.0.1"); address.sin_port = htons(80); if (connect(sockfd, (sockaddr*)(&address), sizeof(address))) { std::cerr << "connect failed " << std::endl; exit(1); } __gnu_cxx::stdio_filebuf<char> sockBuf (sockfd, std::ios_base::in | std::ios_base::out); std::iostream sock(&sockBuf); std::string in; sock << "GET / HTTP/1.0\n\n" << std::flush; // succeeds sockBuf.pubseekoff(0, std::ios_base::cur); // to prevent failure on std::getline(sock, in); // socket crashes std::cout << "have read: " << in << '\n'; // amd64: <null> ; i386: HTTP/1.1 200 OK sleep(20); // pause to check apache logs if connection closed return 0; } /// end of http.c /// /// ftp.c: /// #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <unistd.h> #include <string> #include <iostream> #include <ext/stdio_filebuf.h> int main() { int sockfd = socket(AF_INET, SOCK_STREAM, 0); sockaddr_in address; address.sin_family = AF_INET; address.sin_addr.s_addr = inet_addr("127.0.0.1"); address.sin_port = htons(21); if (connect(sockfd, (sockaddr*)(&address), sizeof(address))) { std::cerr << "connect failed " << std::endl; exit(1); } __gnu_cxx::stdio_filebuf<char> sockBuf (sockfd, std::ios_base::in | std::ios_base::out); std::iostream sock(&sockBuf); std::string in; std::getline(sock, in); // succeeds std::cout << in << std::endl; sockBuf.pubseekoff(0, std::ios_base::cur); // to prevent failure on out sock << "quit\n"; // socket crashes if (sock.bad()) { std::cerr << "write failed badly\n"; } in.clear(); sock.clear(); std::getline(sock, in); // hangs std::cerr << "have read\n"; return 0; } Sergey Nivarov
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--- Begin Message --- closing the report, no feedback within the last year. please recheck with gcc-4.4 (unstable) and gcc-4.5 (experimental) and reopen if appropriate.
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