From 664f0763d37f85e2ec53d6394251b5948dcfa727 Mon Sep 17 00:00:00 2001
From: Mark Shinwell <mshinwell@janestreet.com>
Date: Mon, 31 Jul 2017 14:37:47 +0100
Subject: [PATCH 03/12] Fixes for out-of-range Ialloc
Cherry-pick of GPR#1271 which was merged on trunk.
Fixes for Ialloc instructions allocating more than Max_young_wosize words in the minor heap
Out-of-range Ialloc instructions cause various problems, see in particular GPR #1250.
---
Changes | 5 +
asmcomp/cmmgen.ml | 38 ++--
asmcomp/selectgen.ml | 3 +-
testsuite/tests/basic-more/pr1271.ml | 288 ++++++++++++++++++++++++++++
testsuite/tests/basic-more/pr1271.reference | 2 +
5 files changed, 317 insertions(+), 19 deletions(-)
create mode 100644 testsuite/tests/basic-more/pr1271.ml
create mode 100644 testsuite/tests/basic-more/pr1271.reference
diff --git a/Changes b/Changes
index cc7e0a82f..e8dbd42e2 100644
--- a/Changes
+++ b/Changes
@@ -4,6 +4,11 @@ Working 4.05.x branch
- MPR#7591, GPR#1257: on x86-64, frame table is not 8-aligned
(Xavier Leroy, report by Mantis user "voglerr", review by Gabriel Scherer)
+- GPR#1271: Don't generate Ialloc instructions for closures that exceed
+ Max_young_wosize; instead allocate them on the major heap. (Related
+ to GPR#1250.)
+ (Mark Shinwell)
+
OCaml 4.05.0 (13 Jul 2017):
---------------------------
diff --git a/asmcomp/cmmgen.ml b/asmcomp/cmmgen.ml
index 4ac4b40c6..2120d3985 100644
--- a/asmcomp/cmmgen.ml
+++ b/asmcomp/cmmgen.ml
@@ -1641,29 +1641,31 @@ let rec transl env e =
List.iter (fun f -> Queue.add f functions) fundecls;
Cconst_symbol lbl
| Uclosure(fundecls, clos_vars) ->
- let block_size =
- fundecls_size fundecls + List.length clos_vars in
let rec transl_fundecls pos = function
[] ->
List.map (transl env) clos_vars
| f :: rem ->
Queue.add f functions;
- let header =
- if pos = 0
- then alloc_closure_header block_size f.dbg
- else alloc_infix_header pos f.dbg in
- if f.arity = 1 || f.arity = 0 then
- header ::
- Cconst_symbol f.label ::
- int_const f.arity ::
- transl_fundecls (pos + 3) rem
- else
- header ::
- Cconst_symbol(curry_function f.arity) ::
- int_const f.arity ::
- Cconst_symbol f.label ::
- transl_fundecls (pos + 4) rem in
- Cop(Calloc, transl_fundecls 0 fundecls, Debuginfo.none)
+ let without_header =
+ if f.arity = 1 || f.arity = 0 then
+ Cconst_symbol f.label ::
+ int_const f.arity ::
+ transl_fundecls (pos + 3) rem
+ else
+ Cconst_symbol(curry_function f.arity) ::
+ int_const f.arity ::
+ Cconst_symbol f.label ::
+ transl_fundecls (pos + 4) rem
+ in
+ if pos = 0 then without_header
+ else (alloc_infix_header pos f.dbg) :: without_header
+ in
+ let dbg =
+ match fundecls with
+ | [] -> Debuginfo.none
+ | fundecl::_ -> fundecl.dbg
+ in
+ make_alloc dbg Obj.closure_tag (transl_fundecls 0 fundecls)
| Uoffset(arg, offset) ->
(* produces a valid Caml value, pointing just after an infix header *)
let ptr = transl env arg in
diff --git a/asmcomp/selectgen.ml b/asmcomp/selectgen.ml
index 7cd8cd5c3..1158fc0d0 100644
--- a/asmcomp/selectgen.ml
+++ b/asmcomp/selectgen.ml
@@ -738,7 +738,8 @@ method emit_expr (env:environment) exp =
loc_arg (Proc.loc_external_results rd) in
self#insert_move_results loc_res rd stack_ofs;
Some rd
- | Ialloc { words = _; spacetime_index; label_after_call_gc; } ->
+ | Ialloc { words; spacetime_index; label_after_call_gc; } ->
+ assert (words <= Config.max_young_wosize);
let rd = self#regs_for typ_val in
let size = size_expr env (Ctuple new_args) in
let op =
diff --git a/testsuite/tests/basic-more/pr1271.ml b/testsuite/tests/basic-more/pr1271.ml
new file mode 100644
index 000000000..3890d0fbb
--- /dev/null
+++ b/testsuite/tests/basic-more/pr1271.ml
@@ -0,0 +1,288 @@
+(* GPR#1271 *)
+
+module F (X : sig val x : int end) = struct
+ let rec f1 y = f270 (X.x + y)
+ and f2 y = (f1 [@inlined never]) y
+ and f3 y = (f2 [@inlined never]) y
+ and f4 y = (f3 [@inlined never]) y
+ and f5 y = (f4 [@inlined never]) y
+ and f6 y = (f5 [@inlined never]) y
+ and f7 y = (f6 [@inlined never]) y
+ and f8 y = (f7 [@inlined never]) y
+ and f9 y = (f8 [@inlined never]) y
+ and f10 y = (f9 [@inlined never]) y
+ and f11 y = (f10 [@inlined never]) y
+ and f12 y = (f11 [@inlined never]) y
+ and f13 y = (f12 [@inlined never]) y
+ and f14 y = (f13 [@inlined never]) y
+ and f15 y = (f14 [@inlined never]) y
+ and f16 y = (f15 [@inlined never]) y
+ and f17 y = (f16 [@inlined never]) y
+ and f18 y = (f17 [@inlined never]) y
+ and f19 y = (f18 [@inlined never]) y
+ and f20 y = (f19 [@inlined never]) y
+ and f21 y = (f20 [@inlined never]) y
+ and f22 y = (f21 [@inlined never]) y
+ and f23 y = (f22 [@inlined never]) y
+ and f24 y = (f23 [@inlined never]) y
+ and f25 y = (f24 [@inlined never]) y
+ and f26 y = (f25 [@inlined never]) y
+ and f27 y = (f26 [@inlined never]) y
+ and f28 y = (f27 [@inlined never]) y
+ and f29 y = (f28 [@inlined never]) y
+ and f30 y = (f29 [@inlined never]) y
+ and f31 y = (f30 [@inlined never]) y
+ and f32 y = (f31 [@inlined never]) y
+ and f33 y = (f32 [@inlined never]) y
+ and f34 y = (f33 [@inlined never]) y
+ and f35 y = (f34 [@inlined never]) y
+ and f36 y = (f35 [@inlined never]) y
+ and f37 y = (f36 [@inlined never]) y
+ and f38 y = (f37 [@inlined never]) y
+ and f39 y = (f38 [@inlined never]) y
+ and f40 y = (f39 [@inlined never]) y
+ and f41 y = (f40 [@inlined never]) y
+ and f42 y = (f41 [@inlined never]) y
+ and f43 y = (f42 [@inlined never]) y
+ and f44 y = (f43 [@inlined never]) y
+ and f45 y = (f44 [@inlined never]) y
+ and f46 y = (f45 [@inlined never]) y
+ and f47 y = (f46 [@inlined never]) y
+ and f48 y = (f47 [@inlined never]) y
+ and f49 y = (f48 [@inlined never]) y
+ and f50 y = (f49 [@inlined never]) y
+ and f51 y = (f50 [@inlined never]) y
+ and f52 y = (f51 [@inlined never]) y
+ and f53 y = (f52 [@inlined never]) y
+ and f54 y = (f53 [@inlined never]) y
+ and f55 y = (f54 [@inlined never]) y
+ and f56 y = (f55 [@inlined never]) y
+ and f57 y = (f56 [@inlined never]) y
+ and f58 y = (f57 [@inlined never]) y
+ and f59 y = (f58 [@inlined never]) y
+ and f60 y = (f59 [@inlined never]) y
+ and f61 y = (f60 [@inlined never]) y
+ and f62 y = (f61 [@inlined never]) y
+ and f63 y = (f62 [@inlined never]) y
+ and f64 y = (f63 [@inlined never]) y
+ and f65 y = (f64 [@inlined never]) y
+ and f66 y = (f65 [@inlined never]) y
+ and f67 y = (f66 [@inlined never]) y
+ and f68 y = (f67 [@inlined never]) y
+ and f69 y = (f68 [@inlined never]) y
+ and f70 y = (f69 [@inlined never]) y
+ and f71 y = (f70 [@inlined never]) y
+ and f72 y = (f71 [@inlined never]) y
+ and f73 y = (f72 [@inlined never]) y
+ and f74 y = (f73 [@inlined never]) y
+ and f75 y = (f74 [@inlined never]) y
+ and f76 y = (f75 [@inlined never]) y
+ and f77 y = (f76 [@inlined never]) y
+ and f78 y = (f77 [@inlined never]) y
+ and f79 y = (f78 [@inlined never]) y
+ and f80 y = (f79 [@inlined never]) y
+ and f81 y = (f80 [@inlined never]) y
+ and f82 y = (f81 [@inlined never]) y
+ and f83 y = (f82 [@inlined never]) y
+ and f84 y = (f83 [@inlined never]) y
+ and f85 y = (f84 [@inlined never]) y
+ and f86 y = (f85 [@inlined never]) y
+ and f87 y = (f86 [@inlined never]) y
+ and f88 y = (f87 [@inlined never]) y
+ and f89 y = (f88 [@inlined never]) y
+ and f90 y = (f89 [@inlined never]) y
+ and f91 y = (f90 [@inlined never]) y
+ and f92 y = (f91 [@inlined never]) y
+ and f93 y = (f92 [@inlined never]) y
+ and f94 y = (f93 [@inlined never]) y
+ and f95 y = (f94 [@inlined never]) y
+ and f96 y = (f95 [@inlined never]) y
+ and f97 y = (f96 [@inlined never]) y
+ and f98 y = (f97 [@inlined never]) y
+ and f99 y = (f98 [@inlined never]) y
+ and f100 y = (f99 [@inlined never]) y
+ and f101 y = (f100 [@inlined never]) y
+ and f102 y = (f101 [@inlined never]) y
+ and f103 y = (f102 [@inlined never]) y
+ and f104 y = (f103 [@inlined never]) y
+ and f105 y = (f104 [@inlined never]) y
+ and f106 y = (f105 [@inlined never]) y
+ and f107 y = (f106 [@inlined never]) y
+ and f108 y = (f107 [@inlined never]) y
+ and f109 y = (f108 [@inlined never]) y
+ and f110 y = (f109 [@inlined never]) y
+ and f111 y = (f110 [@inlined never]) y
+ and f112 y = (f111 [@inlined never]) y
+ and f113 y = (f112 [@inlined never]) y
+ and f114 y = (f113 [@inlined never]) y
+ and f115 y = (f114 [@inlined never]) y
+ and f116 y = (f115 [@inlined never]) y
+ and f117 y = (f116 [@inlined never]) y
+ and f118 y = (f117 [@inlined never]) y
+ and f119 y = (f118 [@inlined never]) y
+ and f120 y = (f119 [@inlined never]) y
+ and f121 y = (f120 [@inlined never]) y
+ and f122 y = (f121 [@inlined never]) y
+ and f123 y = (f122 [@inlined never]) y
+ and f124 y = (f123 [@inlined never]) y
+ and f125 y = (f124 [@inlined never]) y
+ and f126 y = (f125 [@inlined never]) y
+ and f127 y = (f126 [@inlined never]) y
+ and f128 y = (f127 [@inlined never]) y
+ and f129 y = (f128 [@inlined never]) y
+ and f130 y = (f129 [@inlined never]) y
+ and f131 y = (f130 [@inlined never]) y
+ and f132 y = (f131 [@inlined never]) y
+ and f133 y = (f132 [@inlined never]) y
+ and f134 y = (f133 [@inlined never]) y
+ and f135 y = (f134 [@inlined never]) y
+ and f136 y = (f135 [@inlined never]) y
+ and f137 y = (f136 [@inlined never]) y
+ and f138 y = (f137 [@inlined never]) y
+ and f139 y = (f138 [@inlined never]) y
+ and f140 y = (f139 [@inlined never]) y
+ and f141 y = (f140 [@inlined never]) y
+ and f142 y = (f141 [@inlined never]) y
+ and f143 y = (f142 [@inlined never]) y
+ and f144 y = (f143 [@inlined never]) y
+ and f145 y = (f144 [@inlined never]) y
+ and f146 y = (f145 [@inlined never]) y
+ and f147 y = (f146 [@inlined never]) y
+ and f148 y = (f147 [@inlined never]) y
+ and f149 y = (f148 [@inlined never]) y
+ and f150 y = (f149 [@inlined never]) y
+ and f151 y = (f150 [@inlined never]) y
+ and f152 y = (f151 [@inlined never]) y
+ and f153 y = (f152 [@inlined never]) y
+ and f154 y = (f153 [@inlined never]) y
+ and f155 y = (f154 [@inlined never]) y
+ and f156 y = (f155 [@inlined never]) y
+ and f157 y = (f156 [@inlined never]) y
+ and f158 y = (f157 [@inlined never]) y
+ and f159 y = (f158 [@inlined never]) y
+ and f160 y = (f159 [@inlined never]) y
+ and f161 y = (f160 [@inlined never]) y
+ and f162 y = (f161 [@inlined never]) y
+ and f163 y = (f162 [@inlined never]) y
+ and f164 y = (f163 [@inlined never]) y
+ and f165 y = (f164 [@inlined never]) y
+ and f166 y = (f165 [@inlined never]) y
+ and f167 y = (f166 [@inlined never]) y
+ and f168 y = (f167 [@inlined never]) y
+ and f169 y = (f168 [@inlined never]) y
+ and f170 y = (f169 [@inlined never]) y
+ and f171 y = (f170 [@inlined never]) y
+ and f172 y = (f171 [@inlined never]) y
+ and f173 y = (f172 [@inlined never]) y
+ and f174 y = (f173 [@inlined never]) y
+ and f175 y = (f174 [@inlined never]) y
+ and f176 y = (f175 [@inlined never]) y
+ and f177 y = (f176 [@inlined never]) y
+ and f178 y = (f177 [@inlined never]) y
+ and f179 y = (f178 [@inlined never]) y
+ and f180 y = (f179 [@inlined never]) y
+ and f181 y = (f180 [@inlined never]) y
+ and f182 y = (f181 [@inlined never]) y
+ and f183 y = (f182 [@inlined never]) y
+ and f184 y = (f183 [@inlined never]) y
+ and f185 y = (f184 [@inlined never]) y
+ and f186 y = (f185 [@inlined never]) y
+ and f187 y = (f186 [@inlined never]) y
+ and f188 y = (f187 [@inlined never]) y
+ and f189 y = (f188 [@inlined never]) y
+ and f190 y = (f189 [@inlined never]) y
+ and f191 y = (f190 [@inlined never]) y
+ and f192 y = (f191 [@inlined never]) y
+ and f193 y = (f192 [@inlined never]) y
+ and f194 y = (f193 [@inlined never]) y
+ and f195 y = (f194 [@inlined never]) y
+ and f196 y = (f195 [@inlined never]) y
+ and f197 y = (f196 [@inlined never]) y
+ and f198 y = (f197 [@inlined never]) y
+ and f199 y = (f198 [@inlined never]) y
+ and f200 y = (f199 [@inlined never]) y
+ and f201 y = (f200 [@inlined never]) y
+ and f202 y = (f201 [@inlined never]) y
+ and f203 y = (f202 [@inlined never]) y
+ and f204 y = (f203 [@inlined never]) y
+ and f205 y = (f204 [@inlined never]) y
+ and f206 y = (f205 [@inlined never]) y
+ and f207 y = (f206 [@inlined never]) y
+ and f208 y = (f207 [@inlined never]) y
+ and f209 y = (f208 [@inlined never]) y
+ and f210 y = (f209 [@inlined never]) y
+ and f211 y = (f210 [@inlined never]) y
+ and f212 y = (f211 [@inlined never]) y
+ and f213 y = (f212 [@inlined never]) y
+ and f214 y = (f213 [@inlined never]) y
+ and f215 y = (f214 [@inlined never]) y
+ and f216 y = (f215 [@inlined never]) y
+ and f217 y = (f216 [@inlined never]) y
+ and f218 y = (f217 [@inlined never]) y
+ and f219 y = (f218 [@inlined never]) y
+ and f220 y = (f219 [@inlined never]) y
+ and f221 y = (f220 [@inlined never]) y
+ and f222 y = (f221 [@inlined never]) y
+ and f223 y = (f222 [@inlined never]) y
+ and f224 y = (f223 [@inlined never]) y
+ and f225 y = (f224 [@inlined never]) y
+ and f226 y = (f225 [@inlined never]) y
+ and f227 y = (f226 [@inlined never]) y
+ and f228 y = (f227 [@inlined never]) y
+ and f229 y = (f228 [@inlined never]) y
+ and f230 y = (f229 [@inlined never]) y
+ and f231 y = (f230 [@inlined never]) y
+ and f232 y = (f231 [@inlined never]) y
+ and f233 y = (f232 [@inlined never]) y
+ and f234 y = (f233 [@inlined never]) y
+ and f235 y = (f234 [@inlined never]) y
+ and f236 y = (f235 [@inlined never]) y
+ and f237 y = (f236 [@inlined never]) y
+ and f238 y = (f237 [@inlined never]) y
+ and f239 y = (f238 [@inlined never]) y
+ and f240 y = (f239 [@inlined never]) y
+ and f241 y = (f240 [@inlined never]) y
+ and f242 y = (f241 [@inlined never]) y
+ and f243 y = (f242 [@inlined never]) y
+ and f244 y = (f243 [@inlined never]) y
+ and f245 y = (f244 [@inlined never]) y
+ and f246 y = (f245 [@inlined never]) y
+ and f247 y = (f246 [@inlined never]) y
+ and f248 y = (f247 [@inlined never]) y
+ and f249 y = (f248 [@inlined never]) y
+ and f250 y = (f249 [@inlined never]) y
+ and f251 y = (f250 [@inlined never]) y
+ and f252 y = (f251 [@inlined never]) y
+ and f253 y = (f252 [@inlined never]) y
+ and f254 y = (f253 [@inlined never]) y
+ and f255 y = (f254 [@inlined never]) y
+ and f256 y = (f255 [@inlined never]) y
+ and f257 y = (f256 [@inlined never]) y
+ and f258 y = (f257 [@inlined never]) y
+ and f259 y = (f258 [@inlined never]) y
+ and f260 y = (f259 [@inlined never]) y
+ and f261 y = (f260 [@inlined never]) y
+ and f262 y = (f261 [@inlined never]) y
+ and f263 y = (f262 [@inlined never]) y
+ and f264 y = (f263 [@inlined never]) y
+ and f265 y = (f264 [@inlined never]) y
+ and f266 y = (f265 [@inlined never]) y
+ and f267 y = (f266 [@inlined never]) y
+ and f268 y = (f267 [@inlined never]) y
+ and f269 y = (f268 [@inlined never]) y
+ and f270 y = (f269 [@inlined never]) y
+end
+
+let words0 = Gc.minor_words ()
+let words1 = Gc.minor_words ()
+module X = F (struct let x = 42 end)
+let words2 = Gc.minor_words ()
+
+let expected = words1 -. words0
+
+let () =
+ match Sys.backend_type with
+ | Sys.Native ->
+ Printf.printf "%.0f" ((words2 -. words1) -. expected)
+ | Sys.Bytecode | Sys.Other _ ->
+ print_string "0"
diff --git a/testsuite/tests/basic-more/pr1271.reference b/testsuite/tests/basic-more/pr1271.reference
new file mode 100644
index 000000000..6e374c16e
--- /dev/null
+++ b/testsuite/tests/basic-more/pr1271.reference
@@ -0,0 +1,2 @@
+0
+All tests succeeded.
--
2.14.0