author | Zhenqiang Chen <zhenqiang.chen@linaro.org> |
Fri Nov 18 16:22:52 2011 +0800 (2011-11-18) | |
changeset 2856 | 7723b8457efa |
parent 746 | b150d6f590fc |
permissions | -rw-r--r-- |
1 Original patch from gentoo: gentoo/src/patchsets/gcc/4.3.1/gentoo/00_all_gcc-trampolinewarn.patch
2 This trivial patch causes gcc to emit a warning whenever
3 it generates a trampoline. These are otherwise hard to
4 locate. It is rigged to default ON - to have it default
5 to OFF remove the text 'Init(1)' from the common.opt
6 patch, leaving just 'Common Var(warn_trampolines)'.
7 Kevin F. Quinn <kevquinn@gentoo.org> 17 Jan 2006
9 diff -durN gcc-4.3.1.orig/gcc/builtins.c gcc-4.3.1/gcc/builtins.c
10 --- gcc-4.3.1.orig/gcc/builtins.c 2008-04-23 00:36:27.000000000 +0200
11 +++ gcc-4.3.1/gcc/builtins.c 2008-06-10 14:56:54.000000000 +0200
12 @@ -5662,6 +5662,9 @@
13 trampolines_created = 1;
14 INITIALIZE_TRAMPOLINE (r_tramp, r_func, r_chain);
16 + if (warn_trampolines)
17 + warning (OPT_Wtrampolines, "generating trampoline in object (requires executable stack)");
18 +
19 return const0_rtx;
20 }
22 diff -durN gcc-4.3.1.orig/gcc/common.opt gcc-4.3.1/gcc/common.opt
23 --- gcc-4.3.1.orig/gcc/common.opt 2008-01-22 15:11:44.000000000 +0100
24 +++ gcc-4.3.1/gcc/common.opt 2008-06-10 14:56:54.000000000 +0200
25 @@ -182,6 +182,10 @@
26 Common Var(warn_system_headers) Warning
27 Do not suppress warnings from system headers
29 +Wtrampolines
30 +Common Var(warn_trampolines) Init(1)
31 +Warn whenever a trampoline is generated
32 +
33 Wuninitialized
34 Common Var(warn_uninitialized) Warning
35 Warn about uninitialized automatic variables