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| author | Tom Tromey <tom@tromey.com> | 2018-10-09 11:51:33 -0600 |
|---|---|---|
| committer | Tom Tromey <tom@tromey.com> | 2018-10-09 11:51:33 -0600 |
| commit | eff98030f90d3dab4c7d133ab0b0cb02d1921543 (patch) | |
| tree | cb4c841af76767a4c3de8ed1027127b1fbbd3f56 /gdb/doc | |
| parent | 104fefeebb544b7745bb353b63110afa46119647 (diff) | |
| download | gdb-eff98030f90d3dab4c7d133ab0b0cb02d1921543.zip gdb-eff98030f90d3dab4c7d133ab0b0cb02d1921543.tar.gz gdb-eff98030f90d3dab4c7d133ab0b0cb02d1921543.tar.bz2 | |
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 <tom@tromey.com>
* configure: Rebuild.
* sanitize.m4 (AM_GDB_UBSAN): Default to no.
* NEWS: Update --enable-ubsan documentation.
gdb/doc/ChangeLog
2018-10-09 Tom Tromey <tom@tromey.com>
* gdb.texinfo (Configure Options): Update --enable-ubsan
documentation.
Diffstat (limited to 'gdb/doc')
| -rw-r--r-- | gdb/doc/ChangeLog | 5 | ||||
| -rw-r--r-- | gdb/doc/gdb.texinfo | 13 |
2 files changed, 12 insertions, 6 deletions
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 <tom@tromey.com> + + * gdb.texinfo (Configure Options): Update --enable-ubsan + documentation. + 2018-10-08 John Baldwin <jhb@FreeBSD.org> * 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 |