• d-bugmail puremagic.com (36/36) Aug 21 2020 https://issues.dlang.org/show_bug.cgi?id=21186

d-bugmail puremagic.com writes:

https://issues.dlang.org/show_bug.cgi?id=21186

          Issue ID: 21186
           Summary: Inline Assembler: static (thread-local) variables
                    cannot be used
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: nobody puremagic.com
          Reporter: bugzilla digitalmars.com

Moved from https://issues.dlang.org/show_bug.cgi?id=5922

bearophile_hugs eml.cc writes:

D2 code, static (thread-local) variables can't be used in ASM:


void main() {
    static size_t x = 10;
    asm {
        mov EDI, x;
    }
}


It produces:
object.Error: Access Violation


They work using __gshared, this gives no errors:

void main() {
    __gshared static size_t x = 10;
    asm {
        mov EDI, x;
    }
}


My suggestion is to remove this source of errors. One solution may be to
disallow the direct access to static variables from asm code, avoiding this
bug.

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