https://issues.dlang.org/show_bug.cgi?id=13519
Issue ID: 13519
Summary: Debugging issues when main()-containing module not
listed first in DMD commandline
Product: D
Version: D2
Hardware: x86_64
OS: Linux
Status: NEW
Severity: enhancement
Priority: P1
Component: DMD
Assignee: [email protected]
Reporter: [email protected]
It appears that, when compiling for x86_64 on linux, if invoked with a module
besides the one containing main() first on the command line, DMD slightly
messes up something with debug info, making it not possible to read some
variables at runtime.
I've managed to make the problem work with the following setup, requiring two
files; main.d and afunc.d.
main.d:
module main;
import afunc;
void main() {
size_t count;
while(true) {
count = inc(count);
}
}
afunc.d:
module afunc;
auto inc (size_t var) {
return ++var;
}
Compiling it with the following command:
$ dmd -m64 -g -ofbadsymbols afunc.d main.d
Load it in gdb with the following:
$ gdb ./badsymbols
then, in gdb, enter the following commands:
) break main.d:8
) run
here, it should run momentarily, then hit the breakpoint.
) print count
will give the error:
'Could not find the frame base for "D main".'
However, if you compile with this command instead:
$ dmd -m64 -g -ofgoodsymbols main.d afunc.d
then repeat the procedure, print count will show
'$1 = 0'
as expected.
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