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| author | Martin Sebor <msebor@redhat.com> | 2017-01-11 17:28:52 +0000 |
|---|---|---|
| committer | Martin Sebor <msebor@gcc.gnu.org> | 2017-01-11 10:28:52 -0700 |
| commit | bf5fbf465dee3a30588bc9e6895d50a6f4ca59c5 (patch) | |
| tree | a4a7ff7d85ae5229e27ef5950d168a127b78b34b | |
| parent | 19ff0049cd22794359a46c86d34fa19be655ba3d (diff) | |
| download | gcc-bf5fbf465dee3a30588bc9e6895d50a6f4ca59c5.zip gcc-bf5fbf465dee3a30588bc9e6895d50a6f4ca59c5.tar.gz gcc-bf5fbf465dee3a30588bc9e6895d50a6f4ca59c5.tar.bz2 | |
PR c/78768 - -Walloca-larger-than and -Wformat-length warnings disabled by -flto
gcc/ChangeLog:
* c.opt (-Walloca-larger-than, -Wformat-length, -Wformat-truncation):
Also enable for LTO.
gcc/testsuite/ChangeLog:
PR c/78768
* gcc.dg/pr78768.c: New test.
From-SVN: r244326
| -rw-r--r-- | gcc/c-family/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/c-family/c.opt | 6 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/pr78768.c | 13 |
4 files changed, 27 insertions, 3 deletions
diff --git a/gcc/c-family/ChangeLog b/gcc/c-family/ChangeLog index a7f2f0d..8faecd4 100644 --- a/gcc/c-family/ChangeLog +++ b/gcc/c-family/ChangeLog @@ -1,3 +1,9 @@ +2017-01-11 Martin Sebor <msebor@redhat.com> + + PR c/78768 + * c.opt (-Walloca-larger-than, -Wformat-length, -Wformat-truncation): + Also enable for LTO. + 2017-01-10 Jason Merrill <jason@redhat.com> Implement P0195R2, C++17 variadic using. diff --git a/gcc/c-family/c.opt b/gcc/c-family/c.opt index 104d816..1b49d21 100644 --- a/gcc/c-family/c.opt +++ b/gcc/c-family/c.opt @@ -313,7 +313,7 @@ C ObjC C++ ObjC++ Var(warn_alloc_zero) Warning -Walloc-zero Warn for calls to allocation functions that specify zero bytes. Walloca-larger-than= -C ObjC C++ ObjC++ Var(warn_alloca_limit) Warning Joined RejectNegative UInteger +C ObjC C++ LTO ObjC++ Var(warn_alloca_limit) Warning Joined RejectNegative UInteger -Walloca-larger-than=<number> Warn on unbounded uses of alloca, and on bounded uses of alloca whose bound can be larger than <number> bytes. @@ -521,7 +521,7 @@ C ObjC C++ ObjC++ Var(warn_format_extra_args) Warning LangEnabledBy(C ObjC C++ O Warn if passing too many arguments to a function for its format string. Wformat-length -C ObjC C++ ObjC++ Warning Alias(Wformat-length=, 1, 0) +C ObjC C++ LTO ObjC++ Warning Alias(Wformat-length=, 1, 0) Warn about function calls with format strings that write past the end of the destination region. Same as -Wformat-length=1. @@ -538,7 +538,7 @@ C ObjC C++ ObjC++ Var(warn_format_signedness) Warning Warn about sign differences with format functions. Wformat-truncation -C ObjC C++ ObjC++ Warning Alias(Wformat-truncation=, 1, 0) +C ObjC C++ LTO ObjC++ Warning Alias(Wformat-truncation=, 1, 0) Warn about calls to snprintf and similar functions that truncate output. Same as -Wformat-truncation=1. diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index a4987ca..bd56e7b 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2017-01-11 Martin Sebor <msebor@redhat.com> + + PR c/78768 + * gcc.dg/pr78768.c: New test. + 2017-01-11 David Malcolm <dmalcolm@redhat.com> PR driver/78877 diff --git a/gcc/testsuite/gcc.dg/pr78768.c b/gcc/testsuite/gcc.dg/pr78768.c new file mode 100644 index 0000000..e3d16a7e --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr78768.c @@ -0,0 +1,13 @@ +/* PR c/78768 - -Walloca-larger-than and -Wformat-length warnings disabled + by -flto + { dg-do run } + { dg-options "-O2 -Walloca-larger-than=10 -Wformat -Wformat-length -flto" } */ + +int main (void) +{ + char *d = (char *)__builtin_alloca (12); /* { dg-warning "argument to .alloca. is too large" } */ + + __builtin_sprintf (d, "%32s", "x"); /* { dg-warning "directive writing 32 bytes into a region of size 12" "-Wformat-length" { xfail *-*-* } } */ + + return 0; +} |