mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
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66 lines
2.1 KiB
Diff
66 lines
2.1 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Daniel Micay <danielmicay@gmail.com>
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Date: Wed, 23 Aug 2017 20:28:03 -0400
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Subject: [PATCH] use -fwrapv when signed overflow checking is off
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13: 62bea80ab9189b81a8728b71b284b7afba9d5969
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---
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cc/cc.go | 2 ++
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cc/cc_test.go | 2 +-
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cc/sanitize.go | 14 ++++++++++++++
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3 files changed, 17 insertions(+), 1 deletion(-)
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diff --git a/cc/cc.go b/cc/cc.go
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index 9d5b8d894..01cae261a 100644
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--- a/cc/cc.go
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+++ b/cc/cc.go
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@@ -2052,6 +2052,8 @@ func (c *Module) GenerateAndroidBuildActions(actx android.ModuleContext) {
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}
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if c.sanitize != nil {
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flags = c.sanitize.flags(ctx, flags)
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+ } else {
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+ flags.Local.CFlags = append(flags.Local.CFlags, "-fwrapv")
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}
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if c.coverage != nil {
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flags, deps = c.coverage.flags(ctx, flags, deps)
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diff --git a/cc/cc_test.go b/cc/cc_test.go
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index 3631f1998..af9498499 100644
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--- a/cc/cc_test.go
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+++ b/cc/cc_test.go
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@@ -4427,7 +4427,7 @@ func TestIncludeDirectoryOrdering(t *testing.T) {
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conly := []string{"-fPIC", "${config.CommonGlobalConlyflags}"}
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cppOnly := []string{"-fPIC", "${config.CommonGlobalCppflags}", "${config.DeviceGlobalCppflags}", "${config.ArmCppflags}"}
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- cflags := []string{"-Werror", "-std=candcpp"}
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+ cflags := []string{"-Werror", "-std=candcpp", "-fwrapv"}
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cstd := []string{"-std=gnu17", "-std=conly"}
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cppstd := []string{"-std=gnu++20", "-std=cpp", "-fno-rtti"}
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diff --git a/cc/sanitize.go b/cc/sanitize.go
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index 31c050018..38eeb12af 100644
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--- a/cc/sanitize.go
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+++ b/cc/sanitize.go
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@@ -787,8 +787,22 @@ func toDisableUnsignedShiftBaseChange(flags []string) bool {
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func (s *sanitize) flags(ctx ModuleContext, flags Flags) Flags {
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if !s.Properties.SanitizerEnabled && !s.Properties.UbsanRuntimeDep {
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+ flags.Local.CFlags = append(flags.Local.CFlags, "-fwrapv")
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return flags
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}
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+
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+ wrapv := true
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+ for _, san := range s.Properties.Sanitizers {
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+ if san == "signed-integer-overflow" || san == "integer" || san == "undefined" {
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+ wrapv = false
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+ break
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+ }
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+ }
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+
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+ if wrapv {
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+ flags.Local.CFlags = append(flags.Local.CFlags, "-fwrapv")
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+ }
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+
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sanProps := &s.Properties.SanitizeMutated
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if Bool(sanProps.Address) {
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