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Bug 14976 – object file output is unstable/different

Status: NEW
Severity: normal
Priority: P3
Component: dmd
Product: D
Version: D2
Platform: All
OS: All
Creation time: 2015-08-29T11:38:48Z
Last change time: 2024-12-13T18:44:23Z
Assigned to: No Owner
Creator: Martin Nowak

Moved to GitHub: dmd#19034 →

Comments

Comment #0 by code — 2015-08-29T11:38:48Z

The order in which undefined symbols are emitted depend on the allocated address of symbols (which in turn change with ASLR). This is problematic for testing purposes but also prevents from caching linker steps. https://github.com/D-Programming-Language/dmd/blob/20771f89a16d9ab663b2964db8d49706cfa0e1dd/src/backend/cgen.c#L501 A solution would be to use a string table instead of AArray.

Comment #1 by ibuclaw — 2016-09-25T14:45:33Z

*** Issue 16185 has been marked as a duplicate of this issue. ***

Comment #2 by code — 2017-02-12T14:48:35Z

A common solution in other compilers (clang) is to use an ordered hash table, consisting of a hash table for O(1) access and an array for ordered processing. Would be a good fit here as well. http://llvm.org/docs/doxygen/html/classllvm_1_1MapVector.html

Comment #3 by robert.schadek — 2024-12-13T18:44:23Z

THIS ISSUE HAS BEEN MOVED TO GITHUB https://github.com/dlang/dmd/issues/19034 DO NOT COMMENT HERE ANYMORE, NOBODY WILL SEE IT, THIS ISSUE HAS BEEN MOVED TO GITHUB