From eff98030f90d3dab4c7d133ab0b0cb02d1921543 Mon Sep 17 00:00:00 2001 From: Tom Tromey Date: Tue, 9 Oct 2018 11:51:33 -0600 Subject: Disable the undefined behavior sanitizer by default There have been a few undefined behavior failures reported, and Pedro suggested that the sanitizer be disabled by default. This patch implements this. gdb/ChangeLog 2018-10-09 Tom Tromey * configure: Rebuild. * sanitize.m4 (AM_GDB_UBSAN): Default to no. * NEWS: Update --enable-ubsan documentation. gdb/doc/ChangeLog 2018-10-09 Tom Tromey * gdb.texinfo (Configure Options): Update --enable-ubsan documentation. --- gdb/doc/ChangeLog | 5 +++++ gdb/doc/gdb.texinfo | 13 +++++++------ 2 files changed, 12 insertions(+), 6 deletions(-) (limited to 'gdb/doc') diff --git a/gdb/doc/ChangeLog b/gdb/doc/ChangeLog index a3aace7..c677983 100644 --- a/gdb/doc/ChangeLog +++ b/gdb/doc/ChangeLog @@ -1,3 +1,8 @@ +2018-10-09 Tom Tromey + + * gdb.texinfo (Configure Options): Update --enable-ubsan + documentation. + 2018-10-08 John Baldwin * gdb.texinfo (Contributors): Add SRI International and University diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo index efd6dff..b0dc3bf 100644 --- a/gdb/doc/gdb.texinfo +++ b/gdb/doc/gdb.texinfo @@ -35771,12 +35771,13 @@ to the compiler, which will fail the compilation if the compiler outputs any warning messages. @item --enable-ubsan -Enable the GCC undefined behavior sanitizer. By default this is -disabled in @value{GDBN} releases, but enabled, when available, when -building from git. The undefined behavior sanitizer checks for -C@t{++} undefined behavior. It has a performance cost, so if you are -looking at @value{GDBN}'s performance, you should disable it. The -undefined behavior sanitizer was first introduced in GCC 4.9. +Enable the GCC undefined behavior sanitizer. This is disabled by +default, but passing @code{--enable-ubsan=yes} or +@code{--enable-ubsan=auto} to @code{configure} will enable it. The +undefined behavior sanitizer checks for C@t{++} undefined behavior. +It has a performance cost, so if you are looking at @value{GDBN}'s +performance, you should disable it. The undefined behavior sanitizer +was first introduced in GCC 4.9. @end table @node System-wide configuration -- cgit v1.1