From ba01b7265d8eb333b58b9c789bf6976b280f0157 Mon Sep 17 00:00:00 2001
From: Guangli Dai <gdai@meta.com>
Date: Tue, 14 May 2024 14:27:17 -0700
Subject: [PATCH] Enable limit-usize-gap in CI tests.

Considering the new usize calculation will be default soon, add the
config option in for Travis, Cirrus and appveyor.
---
 .appveyor.yml         |  12 ++-
 .cirrus.yml           |   2 +-
 .travis.yml           | 218 +++++++++++++++++++++---------------------
 scripts/gen_travis.py |   1 +
 4 files changed, 119 insertions(+), 114 deletions(-)

diff --git a/.appveyor.yml b/.appveyor.yml
index d31f9aed..dedc7867 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -5,27 +5,31 @@ environment:
   - MSYSTEM: MINGW64
     CPU: x86_64
     MSVC: amd64
-    CONFIG_FLAGS: --enable-debug
+    CONFIG_FLAGS: --enable-debug --enable-limit-usize-gap
   - MSYSTEM: MINGW64
     CPU: x86_64
-    CONFIG_FLAGS: --enable-debug
+    CONFIG_FLAGS: --enable-debug --enable-limit-usize-gap
   - MSYSTEM: MINGW32
     CPU: i686
     MSVC: x86
-    CONFIG_FLAGS: --enable-debug
+    CONFIG_FLAGS: --enable-debug --enable-limit-usize-gap
   - MSYSTEM: MINGW32
     CPU: i686
-    CONFIG_FLAGS: --enable-debug
+    CONFIG_FLAGS: --enable-debug --enable-limit-usize-gap
   - MSYSTEM: MINGW64
     CPU: x86_64
     MSVC: amd64
+    CONFIG_FLAGS: --enable-limit-usize-gap
   - MSYSTEM: MINGW64
     CPU: x86_64
+    CONFIG_FLAGS: --enable-limit-usize-gap
   - MSYSTEM: MINGW32
     CPU: i686
     MSVC: x86
+    CONFIG_FLAGS: --enable-limit-usize-gap
   - MSYSTEM: MINGW32
     CPU: i686
+    CONFIG_FLAGS: --enable-limit-usize-gap
 
 install:
   - set PATH=c:\msys64\%MSYSTEM%\bin;c:\msys64\usr\bin;%PATH%
diff --git a/.cirrus.yml b/.cirrus.yml
index 585aa42f..8051272c 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -40,7 +40,7 @@ task:
     # We don't perfectly track freebsd stdlib.h definitions.  This is fine when
     # we count as a system header, but breaks otherwise, like during these
     # tests.
-    - ./configure --with-jemalloc-prefix=ci_ ${DEBUG_CONFIG} ${PROF_CONFIG} ${UNCOMMON_CONFIG}
+    - ./configure --with-jemalloc-prefix=ci_ --enable-limit-usize-gap ${DEBUG_CONFIG} ${PROF_CONFIG} ${UNCOMMON_CONFIG}
     - export JFLAG=`sysctl -n kern.smp.cpus`
     - gmake -j${JFLAG}
     - gmake -j${JFLAG} tests
diff --git a/.travis.yml b/.travis.yml
index ceda8989..a32755c6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,331 +12,331 @@ jobs:
   include:
     - os: windows
       arch: amd64
-      env: CC=gcc CXX=g++ EXTRA_CFLAGS="-fcommon"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-limit-usize-gap" EXTRA_CFLAGS="-fcommon"
     - os: windows
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-debug" EXTRA_CFLAGS="-fcommon"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-debug --enable-limit-usize-gap" EXTRA_CFLAGS="-fcommon"
     - os: windows
       arch: amd64
-      env: CC=cl.exe CXX=cl.exe
+      env: CC=cl.exe CXX=cl.exe CONFIGURE_FLAGS="--enable-limit-usize-gap"
     - os: windows
       arch: amd64
-      env: CC=gcc CXX=g++ CROSS_COMPILE_32BIT=yes EXTRA_CFLAGS="-fcommon"
+      env: CC=gcc CXX=g++ CROSS_COMPILE_32BIT=yes CONFIGURE_FLAGS="--enable-limit-usize-gap" EXTRA_CFLAGS="-fcommon"
     - os: windows
       arch: amd64
-      env: CC=cl.exe CXX=cl.exe CONFIGURE_FLAGS="--enable-debug"
+      env: CC=cl.exe CXX=cl.exe CONFIGURE_FLAGS="--enable-debug --enable-limit-usize-gap"
     - os: windows
       arch: amd64
-      env: CC=gcc CXX=g++ CROSS_COMPILE_32BIT=yes CONFIGURE_FLAGS="--enable-debug" EXTRA_CFLAGS="-fcommon"
+      env: CC=gcc CXX=g++ CROSS_COMPILE_32BIT=yes CONFIGURE_FLAGS="--enable-debug --enable-limit-usize-gap" EXTRA_CFLAGS="-fcommon"
     - os: windows
       arch: amd64
-      env: CC=cl.exe CXX=cl.exe CROSS_COMPILE_32BIT=yes
+      env: CC=cl.exe CXX=cl.exe CROSS_COMPILE_32BIT=yes CONFIGURE_FLAGS="--enable-limit-usize-gap"
     - os: windows
       arch: amd64
-      env: CC=cl.exe CXX=cl.exe CROSS_COMPILE_32BIT=yes CONFIGURE_FLAGS="--enable-debug"
+      env: CC=cl.exe CXX=cl.exe CROSS_COMPILE_32BIT=yes CONFIGURE_FLAGS="--enable-debug --enable-limit-usize-gap"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=clang CXX=clang++ EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes"
+      env: CC=clang CXX=clang++ CONFIGURE_FLAGS="--enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CROSS_COMPILE_32BIT=yes COMPILER_FLAGS="-m32" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CROSS_COMPILE_32BIT=yes COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-debug" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-debug --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-prof" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-prof --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-stats" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-stats --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-libdl" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-libdl --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-opt-safety-checks" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-opt-safety-checks --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-lg-page=16" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-lg-page=16 --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=tcache:false" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=tcache:false --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=dss:primary" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=dss:primary --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=percpu_arena:percpu" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=percpu_arena:percpu --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=background_thread:true" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=background_thread:true --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=clang CXX=clang++ CROSS_COMPILE_32BIT=yes COMPILER_FLAGS="-m32" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes"
+      env: CC=clang CXX=clang++ CROSS_COMPILE_32BIT=yes COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes"
     - os: linux
       arch: amd64
-      env: CC=clang CXX=clang++ CONFIGURE_FLAGS="--enable-debug" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes"
+      env: CC=clang CXX=clang++ CONFIGURE_FLAGS="--enable-debug --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes"
     - os: linux
       arch: amd64
-      env: CC=clang CXX=clang++ CONFIGURE_FLAGS="--enable-prof" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes"
+      env: CC=clang CXX=clang++ CONFIGURE_FLAGS="--enable-prof --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes"
     - os: linux
       arch: amd64
-      env: CC=clang CXX=clang++ CONFIGURE_FLAGS="--disable-stats" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes"
+      env: CC=clang CXX=clang++ CONFIGURE_FLAGS="--disable-stats --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes"
     - os: linux
       arch: amd64
-      env: CC=clang CXX=clang++ CONFIGURE_FLAGS="--disable-libdl" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes"
+      env: CC=clang CXX=clang++ CONFIGURE_FLAGS="--disable-libdl --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes"
     - os: linux
       arch: amd64
-      env: CC=clang CXX=clang++ CONFIGURE_FLAGS="--enable-opt-safety-checks" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes"
+      env: CC=clang CXX=clang++ CONFIGURE_FLAGS="--enable-opt-safety-checks --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes"
     - os: linux
       arch: amd64
-      env: CC=clang CXX=clang++ CONFIGURE_FLAGS="--with-lg-page=16" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes"
+      env: CC=clang CXX=clang++ CONFIGURE_FLAGS="--with-lg-page=16 --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes"
     - os: linux
       arch: amd64
-      env: CC=clang CXX=clang++ CONFIGURE_FLAGS="--with-malloc-conf=tcache:false" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes"
+      env: CC=clang CXX=clang++ CONFIGURE_FLAGS="--with-malloc-conf=tcache:false --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes"
     - os: linux
       arch: amd64
-      env: CC=clang CXX=clang++ CONFIGURE_FLAGS="--with-malloc-conf=dss:primary" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes"
+      env: CC=clang CXX=clang++ CONFIGURE_FLAGS="--with-malloc-conf=dss:primary --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes"
     - os: linux
       arch: amd64
-      env: CC=clang CXX=clang++ CONFIGURE_FLAGS="--with-malloc-conf=percpu_arena:percpu" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes"
+      env: CC=clang CXX=clang++ CONFIGURE_FLAGS="--with-malloc-conf=percpu_arena:percpu --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes"
     - os: linux
       arch: amd64
-      env: CC=clang CXX=clang++ CONFIGURE_FLAGS="--with-malloc-conf=background_thread:true" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes"
+      env: CC=clang CXX=clang++ CONFIGURE_FLAGS="--with-malloc-conf=background_thread:true --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CROSS_COMPILE_32BIT=yes COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--enable-debug" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CROSS_COMPILE_32BIT=yes COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--enable-debug --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CROSS_COMPILE_32BIT=yes COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--enable-prof" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CROSS_COMPILE_32BIT=yes COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--enable-prof --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CROSS_COMPILE_32BIT=yes COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--disable-stats" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CROSS_COMPILE_32BIT=yes COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--disable-stats --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CROSS_COMPILE_32BIT=yes COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--disable-libdl" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CROSS_COMPILE_32BIT=yes COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--disable-libdl --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CROSS_COMPILE_32BIT=yes COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--enable-opt-safety-checks" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CROSS_COMPILE_32BIT=yes COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--enable-opt-safety-checks --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CROSS_COMPILE_32BIT=yes COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--with-lg-page=16" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CROSS_COMPILE_32BIT=yes COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--with-lg-page=16 --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CROSS_COMPILE_32BIT=yes COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--with-malloc-conf=tcache:false" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CROSS_COMPILE_32BIT=yes COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--with-malloc-conf=tcache:false --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CROSS_COMPILE_32BIT=yes COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--with-malloc-conf=dss:primary" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CROSS_COMPILE_32BIT=yes COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--with-malloc-conf=dss:primary --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CROSS_COMPILE_32BIT=yes COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--with-malloc-conf=percpu_arena:percpu" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CROSS_COMPILE_32BIT=yes COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--with-malloc-conf=percpu_arena:percpu --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CROSS_COMPILE_32BIT=yes COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--with-malloc-conf=background_thread:true" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CROSS_COMPILE_32BIT=yes COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--with-malloc-conf=background_thread:true --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-debug --enable-prof" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-debug --enable-prof --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-debug --disable-stats" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-debug --disable-stats --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-debug --disable-libdl" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-debug --disable-libdl --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-debug --enable-opt-safety-checks" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-debug --enable-opt-safety-checks --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-debug --with-lg-page=16" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-debug --with-lg-page=16 --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-debug --with-malloc-conf=tcache:false" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-debug --with-malloc-conf=tcache:false --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-debug --with-malloc-conf=dss:primary" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-debug --with-malloc-conf=dss:primary --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-debug --with-malloc-conf=percpu_arena:percpu" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-debug --with-malloc-conf=percpu_arena:percpu --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-debug --with-malloc-conf=background_thread:true" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-debug --with-malloc-conf=background_thread:true --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-prof --disable-stats" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-prof --disable-stats --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-prof --disable-libdl" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-prof --disable-libdl --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-prof --enable-opt-safety-checks" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-prof --enable-opt-safety-checks --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-prof --with-lg-page=16" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-prof --with-lg-page=16 --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-prof --with-malloc-conf=tcache:false" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-prof --with-malloc-conf=tcache:false --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-prof --with-malloc-conf=dss:primary" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-prof --with-malloc-conf=dss:primary --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-prof --with-malloc-conf=percpu_arena:percpu" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-prof --with-malloc-conf=percpu_arena:percpu --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-prof --with-malloc-conf=background_thread:true" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-prof --with-malloc-conf=background_thread:true --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-stats --disable-libdl" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-stats --disable-libdl --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-stats --enable-opt-safety-checks" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-stats --enable-opt-safety-checks --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-stats --with-lg-page=16" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-stats --with-lg-page=16 --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-stats --with-malloc-conf=tcache:false" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-stats --with-malloc-conf=tcache:false --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-stats --with-malloc-conf=dss:primary" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-stats --with-malloc-conf=dss:primary --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-stats --with-malloc-conf=percpu_arena:percpu" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-stats --with-malloc-conf=percpu_arena:percpu --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-stats --with-malloc-conf=background_thread:true" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-stats --with-malloc-conf=background_thread:true --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-libdl --enable-opt-safety-checks" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-libdl --enable-opt-safety-checks --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-libdl --with-lg-page=16" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-libdl --with-lg-page=16 --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-libdl --with-malloc-conf=tcache:false" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-libdl --with-malloc-conf=tcache:false --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-libdl --with-malloc-conf=dss:primary" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-libdl --with-malloc-conf=dss:primary --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-libdl --with-malloc-conf=percpu_arena:percpu" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-libdl --with-malloc-conf=percpu_arena:percpu --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-libdl --with-malloc-conf=background_thread:true" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-libdl --with-malloc-conf=background_thread:true --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-opt-safety-checks --with-lg-page=16" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-opt-safety-checks --with-lg-page=16 --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-opt-safety-checks --with-malloc-conf=tcache:false" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-opt-safety-checks --with-malloc-conf=tcache:false --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-opt-safety-checks --with-malloc-conf=dss:primary" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-opt-safety-checks --with-malloc-conf=dss:primary --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-opt-safety-checks --with-malloc-conf=percpu_arena:percpu" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-opt-safety-checks --with-malloc-conf=percpu_arena:percpu --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-opt-safety-checks --with-malloc-conf=background_thread:true" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-opt-safety-checks --with-malloc-conf=background_thread:true --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-lg-page=16 --with-malloc-conf=tcache:false" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-lg-page=16 --with-malloc-conf=tcache:false --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-lg-page=16 --with-malloc-conf=dss:primary" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-lg-page=16 --with-malloc-conf=dss:primary --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-lg-page=16 --with-malloc-conf=percpu_arena:percpu" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-lg-page=16 --with-malloc-conf=percpu_arena:percpu --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-lg-page=16 --with-malloc-conf=background_thread:true" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-lg-page=16 --with-malloc-conf=background_thread:true --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=tcache:false,dss:primary" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=tcache:false,dss:primary --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=tcache:false,percpu_arena:percpu" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=tcache:false,percpu_arena:percpu --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=tcache:false,background_thread:true" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=tcache:false,background_thread:true --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=dss:primary,percpu_arena:percpu" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=dss:primary,percpu_arena:percpu --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=dss:primary,background_thread:true" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=dss:primary,background_thread:true --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=percpu_arena:percpu,background_thread:true" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=percpu_arena:percpu,background_thread:true --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: arm64
-      env: CC=gcc CXX=g++ EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: arm64
-      env: CC=clang CXX=clang++ EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes"
+      env: CC=clang CXX=clang++ CONFIGURE_FLAGS="--enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes"
     - os: linux
       arch: arm64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-debug" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-debug --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: arm64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-prof" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-prof --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: arm64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-stats" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-stats --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: arm64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-libdl" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-libdl --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: arm64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-opt-safety-checks" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-opt-safety-checks --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: arm64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-lg-page=16" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-lg-page=16 --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: arm64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-lg-page=16 --with-lg-hugepage=29" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-lg-page=16 --with-lg-hugepage=29 --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: arm64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=tcache:false" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=tcache:false --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: arm64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=dss:primary" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=dss:primary --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: arm64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=percpu_arena:percpu" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=percpu_arena:percpu --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       arch: arm64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=background_thread:true" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=background_thread:true --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: osx
       arch: amd64
-      env: CC=gcc CXX=g++ EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes -Wno-deprecated-declarations"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes -Wno-deprecated-declarations"
     - os: osx
       arch: amd64
-      env: CC=gcc CXX=g++ CROSS_COMPILE_32BIT=yes EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes -Wno-deprecated-declarations"
+      env: CC=gcc CXX=g++ CROSS_COMPILE_32BIT=yes CONFIGURE_FLAGS="--enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes -Wno-deprecated-declarations"
     - os: osx
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-debug" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes -Wno-deprecated-declarations"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-debug --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes -Wno-deprecated-declarations"
     - os: osx
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-stats" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes -Wno-deprecated-declarations"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-stats --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes -Wno-deprecated-declarations"
     - os: osx
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-libdl" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes -Wno-deprecated-declarations"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--disable-libdl --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes -Wno-deprecated-declarations"
     - os: osx
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-opt-safety-checks" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes -Wno-deprecated-declarations"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-opt-safety-checks --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes -Wno-deprecated-declarations"
     - os: osx
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-lg-page=16" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes -Wno-deprecated-declarations"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-lg-page=16 --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes -Wno-deprecated-declarations"
     - os: osx
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=tcache:false" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes -Wno-deprecated-declarations"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=tcache:false --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes -Wno-deprecated-declarations"
     - os: osx
       arch: amd64
-      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=percpu_arena:percpu" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes -Wno-deprecated-declarations"
+      env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--with-malloc-conf=percpu_arena:percpu --enable-limit-usize-gap" EXTRA_CFLAGS="-Werror -Wno-array-bounds -Wno-unknown-warning-option -Wno-ignored-attributes -Wno-deprecated-declarations"
     # Development build
     - os: linux
       env: CC=gcc CXX=g++ CONFIGURE_FLAGS="--enable-debug --disable-cache-oblivious --enable-stats --enable-log --enable-prof" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
diff --git a/scripts/gen_travis.py b/scripts/gen_travis.py
index 43457967..a49bb83b 100755
--- a/scripts/gen_travis.py
+++ b/scripts/gen_travis.py
@@ -191,6 +191,7 @@ def format_job(os, arch, combination):
     if len(malloc_conf) > 0:
         configure_flags.append('--with-malloc-conf=' + ','.join(malloc_conf))
 
+    configure_flags.append('--enable-limit-usize-gap')
     if not compilers:
         compiler = GCC.value
     else: