runtime loaded shared library on osx: partially worked in 2.062, fails since 2.063

[dlangBugzillaToGithub]

Timothee Cour (@timotheecour) reported this on 2014-02-18T00:44:37Z

Transferred from https://issues.dlang.org/show_bug.cgi?id=12190

CC List

• Walter Bright (@WalterBright)

Description

Now that issue 11478 is partially fixed (linktime shared libraries), on to runtime loaded shared libraries:

----
module foo;
import std.stdio;

extern(C) void foo1(){
  printf("ok1
");
  import core.runtime;
  bool ret=Runtime.initialize(); //is it necessary?
  printf("ret=%d
",ret);
  printf("ok2
");
  writeln("ok3");
  int[]a;
  a.length=2; //ok
  writeln(a.length); //dmd2.062 only crashes at this point
}
----
module main2;
import std.stdio, core.sys.posix.dlfcn;
void main(){
  string file="libfoo.dylib";
  auto handle = dlopen(file.ptr, RTLD_LAZY | RTLD_GLOBAL);
  auto funptr = cast(void function()) dlsym(handle, "foo1");
  funptr();
}
----
dmd -oflibfoo.dylib -shared foo.d;
dmd main.d
./main

--output:
2.062:
crashes at writeln(a.length)  (lldb shows it crashes inside LockingTextWriter), which can still be useful for writing plugins.

git head: crashes upon loading


Also, note that dlopen() of a D shared library works when called from a C++ file, and that a C++ file can call multiple D shared libraries simultaneously when using RTLD_LAZY option. 

Before waiting for a full solution with an integrated druntime, is there at least a way to have a separate runtime in each shared library, so that dlopen() can be called from a D file?

[dlangBugzillaToGithub]

bugzilla (@WalterBright) commented on 2014-06-20T20:52:41Z

It appears from the text here that this is not a regression since it never did work. Reclassified.