Fix libunwind segfaults from JIT frames on FreeBSD (#42970)

This adds libunwind PR 308 as a patch and updates LibUnwind_jll to use a
version with that patch included.

(cherry picked from commit 96a99c2)

deps/Versions.make

@@ -101,7 +101,7 @@ SUITESPARSE_JLL_NAME := SuiteSparse
 # unwind
 UNWIND_VER := 1.3.2
 UNWIND_JLL_NAME := LibUnwind
-UNWIND_JLL_VER  := 1.3.2+4
+UNWIND_JLL_VER  := 1.3.2+6
 
 # zlib
 ZLIB_VER := 1.2.11

deps/checksums/unwind

@@ -1,26 +1,26 @@
 LibOSXUnwind.v0.0.6+1.x86_64-apple-darwin.tar.gz/md5/fd98df2005d13aa16341c5aecba1af70
 LibOSXUnwind.v0.0.6+1.x86_64-apple-darwin.tar.gz/sha512/2d2263c3e5f095ad9eba7fea7cb882a19fece8a10486489d0a15b8e81ea0f8626804c4822b8c92a26a608d568c0ff1a4e976ea6d746be47ac1a70891455162a6
-LibUnwind.v1.3.2+4.aarch64-linux-gnu.tar.gz/md5/8f5cbf9820033211513f6d33e36194f1
-LibUnwind.v1.3.2+4.aarch64-linux-gnu.tar.gz/sha512/589886c4f141064126aecc1bf63365c610a4c3dd70e386aa8e17ce562505cac873542fa92cea023850e9bf54fcef3cf475d52f035d17d830a81c01d06d0454e4
-LibUnwind.v1.3.2+4.aarch64-linux-musl.tar.gz/md5/836a2d8ea7a11d87a74aee09f82582b5
-LibUnwind.v1.3.2+4.aarch64-linux-musl.tar.gz/sha512/4cd3805ae59854fdceee441967ba4b812246cf1a1e9ed20367f5bbbad9a47f0093731b4f78f881c696e52c101dec83498398c7b798c81c1a441232cd4ee96b58
-LibUnwind.v1.3.2+4.armv6l-linux-gnueabihf.tar.gz/md5/0047d02c4b4888050b363c77106d4ea1
-LibUnwind.v1.3.2+4.armv6l-linux-gnueabihf.tar.gz/sha512/8b02fb5189ca749e421fc17d560601e8624cbcc19a4c5c45e38828323b33db30ced8a92e08ebd429c663e52358c486d3e284e7e04898229cff2839cc01c067d5
-LibUnwind.v1.3.2+4.armv6l-linux-musleabihf.tar.gz/md5/1fe78c6f0ff7120b35c6745b16c6f838
-LibUnwind.v1.3.2+4.armv6l-linux-musleabihf.tar.gz/sha512/9576f913fbc40d00b42573f600c038fea85eb3c9b88a4878cff0e041c4096d9d005b856dbcd0d057dc40a3cdb74deeca6e9c1cc5c213e6e062328f75633ba8e3
-LibUnwind.v1.3.2+4.armv7l-linux-gnueabihf.tar.gz/md5/510db51b0364cf17207eb00e44d58974
-LibUnwind.v1.3.2+4.armv7l-linux-gnueabihf.tar.gz/sha512/76f119654a65b460917f41a321008c5a0593523db53fa12ac9aa82732368ebdee05d6366fdfdcdd300ba0fe4c7239aac25d80fb3b1ad0235f79b235dab68c796
-LibUnwind.v1.3.2+4.armv7l-linux-musleabihf.tar.gz/md5/4bb58bdc423312c74eafe52a781dd712
-LibUnwind.v1.3.2+4.armv7l-linux-musleabihf.tar.gz/sha512/02b69ec40dfcacc447169786bab3aac39c6db6b07874e9657c49a2907654be79efe16863abf09ee1e2a647cd6a651155b65bdbbd6d810a3ceaa332fc0a3ace4b
-LibUnwind.v1.3.2+4.i686-linux-gnu.tar.gz/md5/76f549ae171aad91570d7874e73f44f6
-LibUnwind.v1.3.2+4.i686-linux-gnu.tar.gz/sha512/a5a654dd6233099e841d1b9c54b16cb99d736549d063e28d17d5f2014c3090d829a4a8dc4fee042d0f4a9d8a155fb30c5840cb84b9fd71758256fa072137baad
-LibUnwind.v1.3.2+4.i686-linux-musl.tar.gz/md5/f8b58f061a03f24111f39f2f8cf72c61
-LibUnwind.v1.3.2+4.i686-linux-musl.tar.gz/sha512/cc6dedc551ee4d5e131cdd7ea7dd4a9cc64efe930d16cddb0c21dca7b13076b6810e00e406acb949404c80b506ca9e09d1e223069d8159e9f73fa8aa022e3f41
-LibUnwind.v1.3.2+4.powerpc64le-linux-gnu.tar.gz/md5/2fd4fda3c82c99ff102b630d078723f5
-LibUnwind.v1.3.2+4.powerpc64le-linux-gnu.tar.gz/sha512/b1c7f16d2877e08cfc9d1aa63c5c9acf30049bd11bdad90c6b1425a09f86762c76f0c1a27817ea1b939244f6e24320854552bc860c95f297a772403eeddc053d
-LibUnwind.v1.3.2+4.x86_64-linux-gnu.tar.gz/md5/cd98359922fddcbbcfda56fbc011bea4
-LibUnwind.v1.3.2+4.x86_64-linux-gnu.tar.gz/sha512/7b2d78869be148db23ab8372bb6699abcf26cc58718871f050b8e67054c0c6c909f9a8c59d27c748abeef0ecb5eabc09484043c3b2232469d03c78a42a590e13
-LibUnwind.v1.3.2+4.x86_64-linux-musl.tar.gz/md5/bd8ea5006d6078a1d91743f599f37732
-LibUnwind.v1.3.2+4.x86_64-linux-musl.tar.gz/sha512/1c7feea46d70c60dbecfe6b945a29a086dc120e0d674ea9d488dc7943901711ba0505288694c94a2b0804bab6cd826b32e58912e407ed918724d16b6b6ec1d3d
-LibUnwind.v1.3.2+4.x86_64-unknown-freebsd.tar.gz/md5/e72c36f0563a088282147275de90048b
-LibUnwind.v1.3.2+4.x86_64-unknown-freebsd.tar.gz/sha512/3aaa7e5c21b3bcc30ff7826af4bc0b926865cac3a5b14dfa7f27f0c5d4344fa2a568a78c0c4ee32a18e668758cdac70c09f31f5ca55cc56c3d6a88654aa906fa
+LibUnwind.v1.3.2+6.aarch64-linux-gnu.tar.gz/md5/dcd327c5b3d7b2ba082f2ad7f11939d3
+LibUnwind.v1.3.2+6.aarch64-linux-gnu.tar.gz/sha512/fffedf6df127538dff7cd394b4a780862fded082c7299e5ac36dc682dcd28a35db596c4621e94d9dce8483fb8053c6d0030a25b7a4bbbecc39af3efd3af14ab3
+LibUnwind.v1.3.2+6.aarch64-linux-musl.tar.gz/md5/d1582fc675158d3838f4d36214e51105
+LibUnwind.v1.3.2+6.aarch64-linux-musl.tar.gz/sha512/0636bfc0159b66d6427ae3437be3989930b6d404f94b2ffac92bd9115d87a5509a9bddc723f0c38b7c30ba2098da48c92a74b4648d6361dbebf547ccc4139813
+LibUnwind.v1.3.2+6.armv6l-linux-gnueabihf.tar.gz/md5/3e621439132504c14daae4944fb5eab8
+LibUnwind.v1.3.2+6.armv6l-linux-gnueabihf.tar.gz/sha512/d324018841343873b256df9684b51fdc9108d5b1af73f5275cd2e81d31a4c00917027afac1554b0cdc5bffd5d52a6417612d3f9399bedfb6a49100df594709f4
+LibUnwind.v1.3.2+6.armv6l-linux-musleabihf.tar.gz/md5/4603961011230cf0ef8c24881d7add7a
+LibUnwind.v1.3.2+6.armv6l-linux-musleabihf.tar.gz/sha512/64e87f9074cb51442539a7907c979424682dc5a9a4cf4d538fbdc5f3bcba169c9b4d5aeb445c76060c0b0604d3fb5b0b88dbc7d3d919a4153c403d9c39110115
+LibUnwind.v1.3.2+6.armv7l-linux-gnueabihf.tar.gz/md5/2c8c2ca6b238bfdbd1c4d021df7ac7a6
+LibUnwind.v1.3.2+6.armv7l-linux-gnueabihf.tar.gz/sha512/b665d8d6b5de0b4a23f2577fe12208c4921f7ee6c3643f1434732c3c5203d1892d86f84875e3488cfc85efb250ceb0c66d02f2356e0accb3c24f200c936eeb84
+LibUnwind.v1.3.2+6.armv7l-linux-musleabihf.tar.gz/md5/0f786d4baf3d5f4fc94884ad7ae1b74b
+LibUnwind.v1.3.2+6.armv7l-linux-musleabihf.tar.gz/sha512/1e4c447983d3aee05705b90962f0bbccd58f255b1d7b582069408d8927d21697fdeefea3aeb7ad84d7d087a70417164194d60c66e57bbb3a587845bbf636c06d
+LibUnwind.v1.3.2+6.i686-linux-gnu.tar.gz/md5/d022d2a6a88ccf741c19889055132882
+LibUnwind.v1.3.2+6.i686-linux-gnu.tar.gz/sha512/75615cba1b4e945cd5969fd4debf7edd3913d5ae3819abf8ca724b0f1ece8f03064dcd2fde54d14d052f7e3e15bcb0efa5c7d9b55c4875e7dedee38034038b7f
+LibUnwind.v1.3.2+6.i686-linux-musl.tar.gz/md5/5e57a072a0c683005921db5597f43d64
+LibUnwind.v1.3.2+6.i686-linux-musl.tar.gz/sha512/4bbaac240ef37ed48d1273cb68302e1b856622804f7704917a3db2a213118a9e0bd95ca504555a537aeec7f5baa2057cf93ca62e350a64b428a34770e64602a6
+LibUnwind.v1.3.2+6.powerpc64le-linux-gnu.tar.gz/md5/1ee397961af5567c37b5429d7b7a52cd
+LibUnwind.v1.3.2+6.powerpc64le-linux-gnu.tar.gz/sha512/902017d1c64d00a67a378d0e7aef64493655a88480d27a5f720cac363bbd0aeab2f03f2b77560fae395a5799ae3da1f4122b6e8cda8d80f158c751215a1848bb
+LibUnwind.v1.3.2+6.x86_64-linux-gnu.tar.gz/md5/e45a0c38c35ed4afbdcffe385998e6d3
+LibUnwind.v1.3.2+6.x86_64-linux-gnu.tar.gz/sha512/049ac0d6b74fbc6a96a7abe345b4ec783968a90bd0f3c230558ad9b3a44cbe65cf4553bfc9abdc9128529d746077308570a14f55317ffef5f65836a8413aa938
+LibUnwind.v1.3.2+6.x86_64-linux-musl.tar.gz/md5/77f053b93396484f3e4d37af9a294ad6
+LibUnwind.v1.3.2+6.x86_64-linux-musl.tar.gz/sha512/e87406503348d316940ea28f09b304c9349f3915e1ed193c87b823b7c5c7a1f6046e6b0e5eeba3b4760d5a403def5f87aa42a3f5f4d8c5f540dd4fba3743394b
+LibUnwind.v1.3.2+6.x86_64-unknown-freebsd.tar.gz/md5/33c56decf549b45712642ebc73b622bd
+LibUnwind.v1.3.2+6.x86_64-unknown-freebsd.tar.gz/sha512/ffb3866b2ccd3ddea168b7ce0b345d475914fa4f87a3743b92e3c07ac9453b4ad929ff01596677e00f08d4d30cf67676052cc3c4f985f722a800b82cba8334c3

deps/patches/libunwind-dwarf-table.patch

@@ -0,0 +1,36 @@
+From a5b5fd28ed03cb1ab524d24dc534c1fa167bf5a1 Mon Sep 17 00:00:00 2001
+From: Alex Arslan <ararslan@comcast.net>
+Date: Fri, 5 Nov 2021 16:58:41 -0700
+Subject: [PATCH] Fix table indexing in `dwarf_search_unwind_table`
+
+`table_len` is used as an index into `table`, assuming it represents the
+number of entries. However, it is defined as the number of entries
+multiplied by `sizeof(unw_word_t)`. This is accounted for in other
+places that use `table_len`, e.g. in `lookup`, which divides out the
+size of `unw_word_t`, but the indexing expression uses `table_len`
+directly. So when `table` has say 2 entries, we're actually looking at
+index 15 rather than 1 in the comparison. This can cause the conditional
+to erroneously evaluate to true, allowing the following line to
+segfault.
+
+This was observed with JIT compiled code from Julia with LLVM on
+FreeBSD.
+
+Co-Authored-By: Jameson Nash <vtjnash@gmail.com>
+---
+ src/dwarf/Gfind_proc_info-lsb.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/dwarf/Gfind_proc_info-lsb.c b/src/dwarf/Gfind_proc_info-lsb.c
+index 5e27a501..af4cbce8 100644
+--- a/src/dwarf/Gfind_proc_info-lsb.c
++++ b/src/dwarf/Gfind_proc_info-lsb.c
+@@ -866,7 +866,7 @@ dwarf_search_unwind_table (unw_addr_space_t as, unw_word_t ip,
+   if (as == unw_local_addr_space)
+     {
+       e = lookup (table, table_len, ip - ip_base);
+-      if (e && &e[1] < &table[table_len])
++      if (e && &e[1] < &table[table_len / sizeof (unw_word_t)])
+ 	last_ip = e[1].start_ip_offset + ip_base;
+       else
+ 	last_ip = di->end_ip;

deps/unwind.mk

@@ -28,7 +28,11 @@ $(SRCCACHE)/libunwind-$(UNWIND_VER)/libunwind-cfa-rsp.patch-applied: $(SRCCACHE)
 	cd $(SRCCACHE)/libunwind-$(UNWIND_VER) && patch -p1 -f -u < $(SRCDIR)/patches/libunwind-cfa-rsp.patch
 	echo 1 > $@
 
-$(BUILDDIR)/libunwind-$(UNWIND_VER)/build-configured: $(SRCCACHE)/libunwind-$(UNWIND_VER)/source-extracted $(SRCCACHE)/libunwind-$(UNWIND_VER)/libunwind-cfa-rsp.patch-applied
+$(SRCCACHE)/libunwind-$(UNWIND_VER)/libunwind-dwarf-table.patch-applied: $(SRCCACHE)/libunwind-$(UNWIND_VER)/libunwind-cfa-rsp.patch-applied
+	cd $(SRCCACHE)/libunwind-$(UNWIND_VER) && patch -p1 -f -u -l < $(SRCDIR)/patches/libunwind-dwarf-table.patch
+	echo 1 > $@
+
+$(BUILDDIR)/libunwind-$(UNWIND_VER)/build-configured: $(SRCCACHE)/libunwind-$(UNWIND_VER)/source-extracted $(SRCCACHE)/libunwind-$(UNWIND_VER)/libunwind-dwarf-table.patch-applied
 	mkdir -p $(dir $@)
 	cd $(dir $@) && \
 	$(dir $<)/configure $(CONFIGURE_COMMON) CPPFLAGS="$(CPPFLAGS) $(LIBUNWIND_CPPFLAGS)" CFLAGS="$(CFLAGS) $(LIBUNWIND_CFLAGS)" --disable-shared --disable-minidebuginfo --disable-tests