Add missing _GLOBAL_OFFSET_TABLE_ symbol

commit 1ad8276100
Author: Andrew Noyes <andrew@weaselab.dev>
Date:   Wed Apr 3 12:44:35 2024 -0700

    Add symbols for arm build

commit 058e4d5302
Author: Andrew Noyes <andrew@weaselab.dev>
Date:   Wed Apr 3 12:42:48 2024 -0700

    Add _GLOBAL_OFFSET_TABLE_

commit a201f3ada8
Author: Andrew Noyes <andrew@weaselab.dev>
Date:   Wed Apr 3 12:34:05 2024 -0700

    Add memset to symbol imports

commit c1129ed0e2
Author: Andrew Noyes <andrew@weaselab.dev>
Date:   Wed Apr 3 12:32:28 2024 -0700

    Add symbol imports file

commit 618766ce2e
Author: Andrew Noyes <andrew@weaselab.dev>
Date:   Wed Apr 3 12:27:07 2024 -0700

    Fix objcopy filepath

commit e774a90007
Author: Andrew Noyes <andrew@weaselab.dev>
Date:   Wed Apr 3 12:24:44 2024 -0700

    Use shellcheck precommit without docker

commit baddea7f57
Author: Andrew Noyes <andrew@weaselab.dev>
Date:   Wed Apr 3 12:20:26 2024 -0700

    Update and freeze pre-commit hooks

commit 2d3e7b9004
Author: Andrew Noyes <andrew@weaselab.dev>
Date:   Wed Apr 3 12:19:55 2024 -0700

    Add shellcheck to pre-commit

    Closes #22

commit c4862fee9b
Author: Andrew Noyes <andrew@weaselab.dev>
Date:   Wed Apr 3 12:15:08 2024 -0700

    Add symbol tests for apple

    closes #21

.pre-commit-config.yaml

@@ -1,11 +1,11 @@
 repos:
   - repo: https://github.com/pre-commit/mirrors-clang-format
-    rev: b111689e7b5cba60be3c62d5db2bd1357f4d36ca
+    rev: 6d365699efc33b1b432eab5b4ae331a19e1857de  # frozen: v18.1.2
     hooks:
       - id: clang-format
         exclude: ".*third_party/.*"
   - repo: https://github.com/cheshirekow/cmake-format-precommit
-    rev: e2c2116d86a80e72e7146a06e68b7c228afc6319
+    rev: e2c2116d86a80e72e7146a06e68b7c228afc6319  # frozen: v0.6.13
     hooks:
       - id: cmake-format
   - repo: local
@@ -23,4 +23,8 @@ repos:
         description: disallow checking in SHOW_MEMORY=1
         entry: '^#define SHOW_MEMORY 1$'
         language: pygrep
-        types: [c++]
+        types: [c++]
+  - repo: https://github.com/shellcheck-py/shellcheck-py
+    rev: a23f6b85d0fdd5bb9d564e2579e678033debbdff  # frozen: v0.10.0.1
+    hooks:
+    -   id: shellcheck

CMakeLists.txt

@@ -136,7 +136,8 @@ else()
     TARGET ${PROJECT_NAME}-static
     POST_BUILD
     COMMAND
-      ${CMAKE_OBJCOPY} --keep-global-symbols=${CMAKE_SOURCE_DIR}/symbols.txt
+      ${CMAKE_OBJCOPY}
+      --keep-global-symbols=${CMAKE_SOURCE_DIR}/symbol-exports.txt
       $<TARGET_FILE:${PROJECT_NAME}-static> || echo
       "Proceeding with all symbols global in static library")
 endif()
@@ -295,18 +296,29 @@ if(BUILD_TESTING)
   add_test(NAME conflict_set_cxx_api_test COMMAND conflict_set_cxx_api_test)
 
   # symbol visibility tests
-  if(NOT WASM
+  if(NOT WASM AND NOT CMAKE_BUILD_TYPE STREQUAL Debug)
-     AND NOT APPLE
+    if(APPLE)
-     AND NOT CMAKE_BUILD_TYPE STREQUAL Debug)
+      set(symbol_exports ${CMAKE_SOURCE_DIR}/apple-symbol-exports.txt)
+      set(symbol_imports ${CMAKE_SOURCE_DIR}/apple-symbol-imports.txt)
+    else()
+      set(symbol_exports ${CMAKE_SOURCE_DIR}/symbol-exports.txt)
+      if(CMAKE_SYSTEM_PROCESSOR STREQUAL aarch64)
+        set(symbol_imports ${CMAKE_SOURCE_DIR}/aarch64-symbol-imports.txt)
+      else()
+        set(symbol_imports ${CMAKE_SOURCE_DIR}/symbol-imports.txt)
+      endif()
+    endif()
     add_test(
       NAME conflict_set_shared_symbols
-      COMMAND ${CMAKE_SOURCE_DIR}/test_symbols.sh
+      COMMAND
-              $<TARGET_FILE:${PROJECT_NAME}> ${CMAKE_SOURCE_DIR}/symbols.txt)
+        ${CMAKE_SOURCE_DIR}/test_symbols.sh $<TARGET_FILE:${PROJECT_NAME}>
+        ${symbol_exports} ${symbol_imports})
     add_test(
       NAME conflict_set_static_symbols
       COMMAND
         ${CMAKE_SOURCE_DIR}/test_symbols.sh
-        $<TARGET_FILE:${PROJECT_NAME}-static> ${CMAKE_SOURCE_DIR}/symbols.txt)
+        $<TARGET_FILE:${PROJECT_NAME}-static> ${symbol_exports}
+        ${symbol_imports})
   endif()
 
   # bench
@@ -334,6 +346,12 @@ set(CPACK_RPM_FILE_NAME RPM-DEFAULT)
 
 # deb
 set(CPACK_DEBIAN_FILE_NAME DEB-DEFAULT)
+# see *-imports.txt - dependency versions need to be synced with symbol versions
+if(CMAKE_SYSTEM_PROCESSOR STREQUAL aarch64)
+  set(CPACK_DEBIAN_PACKAGE_DEPENDS "libc6 (>= 2.17)")
+else()
+  set(CPACK_DEBIAN_PACKAGE_DEPENDS "libc6 (>= 2.14)")
+endif()
 
 include(CPack)
 

ConflictSet.cpp

@@ -2614,7 +2614,7 @@ int64_t ConflictSet::getBytes() const { return impl->totalBytes; }
 
 ConflictSet::ConflictSet(int64_t oldestVersion)
     : impl((mallocBytesDelta = 0,
-            new (safe_malloc(sizeof(Impl))) Impl{oldestVersion})) {
+            new(safe_malloc(sizeof(Impl))) Impl{oldestVersion})) {
   impl->totalBytes += mallocBytesDelta;
 }
 

HashTable.cpp

@@ -99,7 +99,7 @@ void ConflictSet::setOldestVersion(int64_t oldestVersion) {
 int64_t ConflictSet::getBytes() const { return -1; }
 
 ConflictSet::ConflictSet(int64_t oldestVersion)
-    : impl(new (safe_malloc(sizeof(Impl))) Impl{oldestVersion}) {}
+    : impl(new(safe_malloc(sizeof(Impl))) Impl{oldestVersion}) {}
 
 ConflictSet::~ConflictSet() {
   if (impl) {

SkipList.cpp

@@ -669,7 +669,7 @@ int64_t ConflictSet::getBytes() const { return impl->totalBytes; }
 
 ConflictSet::ConflictSet(int64_t oldestVersion)
     : impl((mallocBytesDelta = 0,
-            new (safe_malloc(sizeof(Impl))) Impl{oldestVersion})) {
+            new(safe_malloc(sizeof(Impl))) Impl{oldestVersion})) {
   impl->totalBytes += mallocBytesDelta;
 }
 

aarch64-symbol-imports.txt

@@ -0,0 +1,8 @@
+__stack_chk_fail@GLIBC_2.17
+__stack_chk_guard@GLIBC_2.17
+abort@GLIBC_2.17
+free@GLIBC_2.17
+malloc@GLIBC_2.17
+memcpy@GLIBC_2.17
+memmove@GLIBC_2.17
+memset@GLIBC_2.17

apple-symbol-exports.txt

@@ -0,0 +1,17 @@
+_ConflictSet_addWrites
+_ConflictSet_check
+_ConflictSet_create
+_ConflictSet_destroy
+_ConflictSet_getBytes
+_ConflictSet_setOldestVersion
+__ZN8weaselab11ConflictSet16setOldestVersionEx
+__ZN8weaselab11ConflictSet9addWritesEPKNS0_10WriteRangeEix
+__ZN8weaselab11ConflictSetC1EOS0_
+__ZN8weaselab11ConflictSetC1Ex
+__ZN8weaselab11ConflictSetC2EOS0_
+__ZN8weaselab11ConflictSetC2Ex
+__ZN8weaselab11ConflictSetD1Ev
+__ZN8weaselab11ConflictSetD2Ev
+__ZN8weaselab11ConflictSetaSEOS0_
+__ZNK8weaselab11ConflictSet5checkEPKNS0_9ReadRangeEPNS0_6ResultEi
+__ZNK8weaselab11ConflictSet8getBytesEv

apple-symbol-imports.txt

@@ -0,0 +1,7 @@
+__tlv_bootstrap
+_abort
+_bzero
+_free
+_malloc
+_memcpy
+_memmove

privatize_symbols_macos.sh

@@ -2,5 +2,5 @@
 
 # This has the effect of making visibility=hidden symbols private in object files
 for obj in "$@" ; do
-  ld -r $obj -o $obj.tmp && mv $obj.tmp $obj
+  ld -r "$obj" -o "$obj.tmp" && mv "$obj.tmp" "$obj"
 done

symbol-imports.txt

@@ -0,0 +1,9 @@
+_GLOBAL_OFFSET_TABLE_
+__stack_chk_fail@GLIBC_2.4
+__tls_get_addr@GLIBC_2.3
+abort@GLIBC_2.2.5
+free@GLIBC_2.2.5
+malloc@GLIBC_2.2.5
+memcpy@GLIBC_2.14
+memmove@GLIBC_2.2.5
+memset@GLIBC_2.2.5

test_symbols.sh

@@ -2,5 +2,15 @@
 
 set -euo pipefail
 
+# ./test_symbols.sh <library> <expected exported symbols file> <allowed imported symbols file>
+
 diff -u <(sort < "$2") <(nm "$1" | grep " T " | cut -f3 -d " " | sort)
-nm "$1" | grep " U " | (! grep -Pv 'abort|free|malloc|mem[a-z]*|__ashlti3|__stack_chk_[a-z]*|__tls_get_addr|_GLOBAL_OFFSET_TABLE_')
+ec=0
+for symbol in $(nm "$1" | grep " U " | sed 's/ U //') ; do
+    if ! grep --fixed-strings "$symbol" "$3" > /dev/null ; then
+        echo "Imported symbol $symbol not present in $3"
+        ec=1
+    fi
+done
+
+exit $ec