Re: dmd demangle
On Thursday, 31 August 2017 at 03:58:14 UTC, Michael V. Franklin wrote: Just getting unresolved symbols? Yeah, I was just wondering what if the output can be readable, given that dmd is the one that invokes ld. Would be much more human readable without piping through ddemangle. Thanks.
Re: dmd demangle
On Thursday, 31 August 2017 at 02:51:25 UTC, Arun Chandrasekaran wrote: I was looking at src/ddmd/link.d, has the below that reads the output of ld. Ah, right you are. My apologies. It'd probably be simple enough to have that demangling on by default. Maybe I'll give it a go later today. What's your use case? Just getting unresolved symbols? Mike
Re: dmd demangle
On Thursday, 31 August 2017 at 02:31:24 UTC, Michael V. Franklin
wrote:
On Thursday, 31 August 2017 at 02:20:00 UTC, Arun
Chandrasekaran wrote:
Just a thought. Can dmd demangle the symbols before spitting
the output of ld to stderr?
dmd doesn't print the output of ld to stderr, ld does.
I believe binutils has some support for D symbol demangling
thanks to the GDC folks. I tried it once:
http://forum.dlang.org/post/bdmsrcczmizevhxor...@forum.dlang.org
So I think you need to find a way to pass --demangle=dlang to
ld.
Maybe `dmd program.d -L--demangle=dlang`?
Mike
Thanks Mike.
I was looking at src/ddmd/link.d, has the below that reads the
output of ld. So I was wondering if we can plugin the demangle
logic in this function. Nevertheless, good to know the linker
already supports it.
```
private int findNoMainError(int fd)
{
version (OSX)
{
static __gshared const(char)* nmeErrorMessage =
"\"__Dmain\", referenced from:";
}
else
{
static __gshared const(char)* nmeErrorMessage =
"undefined reference to `_Dmain'";
}
FILE* stream = fdopen(fd, "r");
if (stream is null)
return -1;
const(size_t) len = 64 * 1024 - 1;
char[len + 1] buffer; // + '\0'
size_t beg = 0, end = len;
bool nmeFound = false;
for (;;)
{
// read linker output
const(size_t) n = fread([beg], 1, len - beg,
stream);
if (beg + n < len && ferror(stream))
return -1;
buffer[(end = beg + n)] = '\0';
// search error message, stop at last complete line
const(char)* lastSep = strrchr(buffer.ptr, '\n');
if (lastSep)
buffer[(end = lastSep - [0])] = '\0';
if (strstr([0], nmeErrorMessage))
nmeFound = true;
if (lastSep)
buffer[end++] = '\n';
if (fwrite([0], 1, end, stderr) < end)
return -1;
if (beg + n < len && feof(stream))
break;
// copy over truncated last line
memcpy([0], [end], (beg = len - end));
}
return nmeFound ? 1 : 0;
}
```
Re: dmd demangle
Arun Chandrasekaran wrote: Just a thought. Can dmd demangle the symbols before spitting the output of ld to stderr? p.s.: redirecting output to ddemangle may work too, as ddemange will try to detect mangled DMD names, and won't modify other text. this way you can, for example, demangle names in valgrind output.
Re: dmd demangle
Arun Chandrasekaran wrote: Just a thought. Can dmd demangle the symbols before spitting the output of ld to stderr? no need to ;-) just add this to DFLAGS in dmd.conf, "Envirnment" section: -L--demangle=dlang so, it should look something like this: .. [Environment] DFLAGS= -L--demangle=dlang .. due to hard work of Iain Buclaw, gdb and binutils (ld, objdump, etc.) are able to demangle DMD names. note that new DMD version *may* include slightly changed mangling scheme, so the latest betas *may* produce "undecipherable" names.
Re: dmd demangle
On Thursday, 31 August 2017 at 02:20:00 UTC, Arun Chandrasekaran wrote: Just a thought. Can dmd demangle the symbols before spitting the output of ld to stderr? dmd doesn't print the output of ld to stderr, ld does. I believe binutils has some support for D symbol demangling thanks to the GDC folks. I tried it once: http://forum.dlang.org/post/bdmsrcczmizevhxor...@forum.dlang.org So I think you need to find a way to pass --demangle=dlang to ld. Maybe `dmd program.d -L--demangle=dlang`? Mike
