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From: Stephane Glondu <steph@glondu.net>
Date: Sun, 16 Aug 2015 20:59:14 +0200
Subject: Add a .file directive to generated .s files
When no .file directive is given, the toolchain records the filename
of the .o file, which is sometimes random, making generated objects
non-deterministic.
We use Location.input_name for adding .file directives to assembly
files. Note: when the file is preprocessed, this reference holds the
name of the temporary file. Hence, files compiled with -pp are still
not deterministic.
Bug-Debian: https://bugs.debian.org/795784
Bug-Debian: https://bugs.debian.org/796336
---
asmcomp/amd64/emit.mlp | 1 +
asmcomp/arm/emit.mlp | 1 +
asmcomp/arm64/emit.mlp | 1 +
asmcomp/i386/emit.mlp | 1 +
asmcomp/power/emit.mlp | 1 +
asmcomp/sparc/emit.mlp | 1 +
6 files changed, 6 insertions(+)
diff --git a/asmcomp/amd64/emit.mlp b/asmcomp/amd64/emit.mlp
index d56d0f5..4d7aa30 100644
--- a/asmcomp/amd64/emit.mlp
+++ b/asmcomp/amd64/emit.mlp
@@ -794,6 +794,7 @@ let data l =
let begin_assembly() =
reset_debug_info(); (* PR#5603 *)
float_constants := [];
+ ` .file \"{emit_string (String.escaped !Location.input_name)}\"\n`;
if !Clflags.dlcode then begin
(* from amd64.S; could emit these constants on demand *)
if macosx then
diff --git a/asmcomp/arm/emit.mlp b/asmcomp/arm/emit.mlp
index 4948fb2..6f30fba 100644
--- a/asmcomp/arm/emit.mlp
+++ b/asmcomp/arm/emit.mlp
@@ -892,6 +892,7 @@ let data l =
let begin_assembly() =
reset_debug_info();
+ ` .file \"{emit_string (String.escaped !Location.input_name)}\"\n`;
` .syntax unified\n`;
begin match !arch with
| ARMv4 -> ` .arch armv4t\n`
diff --git a/asmcomp/arm64/emit.mlp b/asmcomp/arm64/emit.mlp
index 750c2b2..5afbb8a 100644
--- a/asmcomp/arm64/emit.mlp
+++ b/asmcomp/arm64/emit.mlp
@@ -942,6 +942,7 @@ let data l =
let begin_assembly() =
reset_debug_info();
+ ` .file \"{emit_string (String.escaped !Location.input_name)}\"\n`;
let lbl_begin = Compilenv.make_symbol (Some "data_begin") in
` .data\n`;
` .globl {emit_symbol lbl_begin}\n`;
diff --git a/asmcomp/i386/emit.mlp b/asmcomp/i386/emit.mlp
index 98df5f9..531150f 100644
--- a/asmcomp/i386/emit.mlp
+++ b/asmcomp/i386/emit.mlp
@@ -986,6 +986,7 @@ let data l =
let begin_assembly() =
reset_debug_info(); (* PR#5603 *)
float_constants := [];
+ ` .file \"{emit_string (String.escaped !Location.input_name)}\"\n`;
let lbl_begin = Compilenv.make_symbol (Some "data_begin") in
` .data\n`;
` .globl {emit_symbol lbl_begin}\n`;
diff --git a/asmcomp/power/emit.mlp b/asmcomp/power/emit.mlp
index 4344085..343132b 100644
--- a/asmcomp/power/emit.mlp
+++ b/asmcomp/power/emit.mlp
@@ -887,6 +887,7 @@ let data l =
let begin_assembly() =
defined_functions := StringSet.empty;
external_functions := StringSet.empty;
+ ` .file \"{emit_string (String.escaped !Location.input_name)}\"\n`;
(* Emit the beginning of the segments *)
let lbl_begin = Compilenv.make_symbol (Some "data_begin") in
emit_string data_space;
diff --git a/asmcomp/sparc/emit.mlp b/asmcomp/sparc/emit.mlp
index 877a3d5..7b041e9 100644
--- a/asmcomp/sparc/emit.mlp
+++ b/asmcomp/sparc/emit.mlp
@@ -727,6 +727,7 @@ let data l =
(* Beginning / end of an assembly file *)
let begin_assembly() =
+ ` .file \"{emit_string (String.escaped !Location.input_name)}\"\n`;
let lbl_begin = Compilenv.make_symbol (Some "data_begin") in
` .data\n`;
` .global {emit_symbol lbl_begin}\n`;
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