Opened 10 years ago

Closed 10 years ago

#35 closed defect (fixed)

Release build of AWT.DLL is wrong

Reported by: dmik Owned by:
Priority: blocker Milestone: Beta
Component: general Version:
Severity: Keywords:


When attempting to start an AWT program with a production release build, AWT.DLL can't get loaded: DosLoadModule?() returns error 87 for it (invalid parameter).

Change History (4)

comment:1 Changed 10 years ago by dmik

It turned out that AWT.DLL is corrupt: its static and global data ends up in a wrong memory location when the DLL is loaded. This memory location does not correspond to the original data segment at all and may actually be any memory region including the code segment of another DLL or even a free memory block. Such misalignment leads to a very early crash in _DLL_InitTerm() of AWT.DLL when it calls constructors of global/static C++ objects (which rely in that invalid global data segment) which in turn cause memory access violation.

comment:2 Changed 10 years ago by dmik

I had many guesses regarding that but a lot of experiments and thinking pushed me to a suspicion that relocation (fixup) of global data addresses is done wrongly for some reason when the DLL is loaded by OS/2.

It took just another several hours to find out that the guilty person is WLINK, the one patched by Knut (note that I didn't try the non-patched one to see if it's Knut's patches or not). Switching from WLINK to the VAC308 linker cured the problem. ALl test AWT/Swing applications that I tried work now.

I'm going to rebuild all Java with the VAC308 linker and see if it will work then.

comment:3 Changed 10 years ago by dmik

Tests show that the VAC308 build works well. But ILINK from VAC308 can't actually link the debug build of JVM.DLL, crashes and hangs in DosExitList?... Will try ILINK 5.0 from Mozilla guys...

Tried ILINK 5.0 with the debug build. It brings its own problems :( Now, it doesn't want to pick up operator delete[] from one of the .obj files being compiled but instead takes it from libc.lib... WLINK took the right one. Investigating.

comment:4 Changed 10 years ago by dmik

Resolution: fixed
Status: newclosed

Fixed the delete[] problem. ILINK will be our main linker for Java from now on.

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