Bug 4236 – 'out of memory' error compiling on windows

Reported by [email protected]: i got an 'out of memory' error when compiling lage(r) d files using dmd v1.061 on windows. on freebsd/linux the same dmd version compiles the d source without problems. interesting is that i get the same error when compiling a similar c source code using the digital mars c compiler. anyone knows which wall i'm hitting in the dmd/dmc compiler backend ? the source files in question are generated using the following d program (mkdata.d) from binary blobs (e.g. zip files) : howto reproduce : dmd mkdata mkdata foo.zip > data.d dmd -c data.d for dmc: mkdata -cxx foo.zip > data.c dmc -c data.c the problem starts when foo.zip is larger than 800kb giving a 4+ mb data.d -------------- mkdata.d ---------------------------------------------- import std.stdio; import std.string; import std.file; import std.path; static void gen_d(string name,string data) { writefln("const string name_" ~ name ~ "=\"" ~ name ~ "\";"); writef("const ubyte[] data_" ~ name ~ " = ["); foreach(n,d;data) writef("0x%02x,",d); writefln("\n]; // end of data_" ~ name); } static void gen_cxx(string name,string data) { writefln("#ifndef " ~ std.string.toupper(name) ~ "_h"); writefln("#define " ~ std.string.toupper(name) ~ "_h"); writefln("static const char* name_" ~ name ~ "=\"" ~ name ~ "\";"); writefln("static unsigned int size_" ~ name ~ "=%d;",data.length); writef("static const char data_" ~ name ~ "[] = {"); foreach(n,d;data) { if( (n % 16) == 0) writef("\n// %d : 0x%04x\n",n/16,n); writef("0x%02x,",d); } writefln("\n}; // end of data_" ~ name); writefln("\n#endif // " ~ std.string.toupper(name) ~ "_h"); } int main(string[] args) { bool do_cxx=false; uint n=0; foreach(arg;args[1 .. $]) { if(arg == "-cxx") { do_cxx=true; continue; } if(n == 0 && !do_cxx) writefln("module ddata;\n"); string name=arg; name=replace(name,"-","_"); name=replace(name,".","_"); try { char[] data=cast(char[]) std.file.read(arg); n++; string tag=format("%s%d",name,n); do_cxx ? gen_cxx(name,data) : gen_d(name,data); } catch(FileException ex) { writefln(arg ~ " : got FileEx: " ~ ex.msg); continue ; //next; } } return 0; }

Is this issue still valid?

No, this is no longer an issue. Tested with v2.099.1 on Windows 10. dmd mkdata.d mkdata.exe > data.d dmd -c data.d -------------- mkdata.d ---------------------------------------------- import std.stdio, std.conv; void main() { writeln("module data;\n"); write("const ubyte[] blob = [0"); foreach (i; 1 .. 8_000_000) write(", ", (i % ubyte.max).to!string); writeln("];\n"); }