On Saturday, 11 July 2015 at 01:22:14 UTC, mzfhhhh wrote:
win7 x86 dmd2.067.1 ok
ubuntu x64 dmd2.067.1 error
-------------------------------------
import std.stdio;
import std.socket;
extern(C)
void recv()
{
writeln("recv...");
}
extern(C)
void send()
{
writeln("send...");
}
int main(string[] argv)
{
//copy from std.socket unittest
immutable ubyte[] data = [1, 2, 3, 4];
auto pair = socketPair();
scope(exit) foreach (s; pair) s.close();
pair[0].send(data);
auto buf = new ubyte[data.length];
pair[1].receive(buf);
assert(buf == data);
return 0;
}
----------------------------------
send...
recv...
core.exception.AssertError@a.d(27): Assertion failure
----------------
./a() [0x43d61f]
./a(_Dmain+0xcc) [0x43d1bc]
./a(_D2rt6dmain211_d_run_mainUiPPaPUAAaZiZ6runAllMFZ9__lambda1MFZv+0x1f)
[0x4400fb]
./a(void rt.dmain2._d_run_main(int, char**, extern (C) int
function(char[][])*).tryExec(scope void delegate())+0x2a)
[0x44004e]
./a(void rt.dmain2._d_run_main(int, char**, extern (C) int
function(char[][])*).runAll()+0x30) [0x4400b4]
./a(void rt.dmain2._d_run_main(int, char**, extern (C) int
function(char[][])*).tryExec(scope void delegate())+0x2a)
[0x44004e]
./a(_d_run_main+0x1dc) [0x43ffc8]
./a(main+0x17) [0x43d637]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5)
[0x7f5fabd8fec5]
You basically "overwrite" the C send(2) and recv(2) functions
with your code (the actual symbols, the linker will yours instead
the "real" ones). So std.socket doesn't call the C functions but
yours. Yours obviously don't send and receive data. If you really
want to "overwrite" these functions you might be able to call the
original ones via dlsym.
