> I think this could be simplified if you use either EnumSet or
> EnumBitSet instead in common.opt for `-fcf-protection=`.
Use EnumSet instead of EnumBitSet since CF_FULL is not power of 2.
It is a bit tricky for sets classification, cf_branch and cf_return
should be in different sets, but they both "conflicts" cf_full,
cf_none. And current EnumSet don't handle this well.
So in the current implementation, only cf_full,cf_none are exclusive
to each other, but they can be combined with any cf_branch, cf_return,
cf_check. It's not perfect, but still an improvement than original
one.
gcc/ChangeLog:
* common.opt: (fcf-protection=): Add EnumSet attribute to
support combination of params.
gcc/testsuite/ChangeLog:
* c-c++-common/fcf-protection-10.c: New test.
* c-c++-common/fcf-protection-11.c: New test.
* c-c++-common/fcf-protection-12.c: New test.
* c-c++-common/fcf-protection-8.c: New test.
* c-c++-common/fcf-protection-9.c: New test.
* gcc.target/i386/pr89701-1.c: New test.
* gcc.target/i386/pr89701-2.c: New test.
* gcc.target/i386/pr89701-3.c: New test.
---
gcc/common.opt | 12 ++++++------
gcc/testsuite/c-c++-common/fcf-protection-10.c | 2 ++
gcc/testsuite/c-c++-common/fcf-protection-11.c | 2 ++
gcc/testsuite/c-c++-common/fcf-protection-12.c | 2 ++
gcc/testsuite/c-c++-common/fcf-protection-8.c | 2 ++
gcc/testsuite/c-c++-common/fcf-protection-9.c | 2 ++
gcc/testsuite/gcc.target/i386/pr89701-1.c | 4 ++++
gcc/testsuite/gcc.target/i386/pr89701-2.c | 4 ++++
gcc/testsuite/gcc.target/i386/pr89701-3.c | 4 ++++
9 files changed, 28 insertions(+), 6 deletions(-)
create mode 100644 gcc/testsuite/c-c++-common/fcf-protection-10.c
create mode 100644 gcc/testsuite/c-c++-common/fcf-protection-11.c
create mode 100644 gcc/testsuite/c-c++-common/fcf-protection-12.c
create mode 100644 gcc/testsuite/c-c++-common/fcf-protection-8.c
create mode 100644 gcc/testsuite/c-c++-common/fcf-protection-9.c
create mode 100644 gcc/testsuite/gcc.target/i386/pr89701-1.c
create mode 100644 gcc/testsuite/gcc.target/i386/pr89701-2.c
create mode 100644 gcc/testsuite/gcc.target/i386/pr89701-3.c
diff --git a/gcc/common.opt b/gcc/common.opt
index a28ca13385a..02f2472959a 100644
--- a/gcc/common.opt
+++ b/gcc/common.opt
@@ -1886,7 +1886,7 @@ fcf-protection
Common RejectNegative Alias(fcf-protection=,full)
fcf-protection=
-Common Joined RejectNegative Enum(cf_protection_level) Var(flag_cf_protection)
Init(CF_NONE)
+Common Joined RejectNegative Enum(cf_protection_level) EnumSet
Var(flag_cf_protection) Init(CF_NONE)
-fcf-protection=[full|branch|return|none|check] Instrument functions
with checks to verify jump/call/return control-flow transfer
instructions have valid targets.
@@ -1894,19 +1894,19 @@ Enum
Name(cf_protection_level) Type(enum cf_protection_level) UnknownError(unknown
Control-Flow Protection Level %qs)
EnumValue
-Enum(cf_protection_level) String(full) Value(CF_FULL)
+Enum(cf_protection_level) String(full) Value(CF_FULL) Set(1)
EnumValue
-Enum(cf_protection_level) String(branch) Value(CF_BRANCH)
+Enum(cf_protection_level) String(branch) Value(CF_BRANCH) Set(2)
EnumValue
-Enum(cf_protection_level) String(return) Value(CF_RETURN)
+Enum(cf_protection_level) String(return) Value(CF_RETURN) Set(3)
EnumValue
-Enum(cf_protection_level) String(check) Value(CF_CHECK)
+Enum(cf_protection_level) String(check) Value(CF_CHECK) Set(4)
EnumValue
-Enum(cf_protection_level) String(none) Value(CF_NONE)
+Enum(cf_protection_level) String(none) Value(CF_NONE) Set(1)
finstrument-functions
Common Var(flag_instrument_function_entry_exit,1)
diff --git a/gcc/testsuite/c-c++-common/fcf-protection-10.c
b/gcc/testsuite/c-c++-common/fcf-protection-10.c
new file mode 100644
index 00000000000..b271d134e52
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/fcf-protection-10.c
@@ -0,0 +1,2 @@
+/* { dg-do compile { target { "i?86-*-* x86_64-*-*" } } } */
+/* { dg-options "-fcf-protection=branch,check" } */
diff --git a/gcc/testsuite/c-c++-common/fcf-protection-11.c
b/gcc/testsuite/c-c++-common/fcf-protection-11.c
new file mode 100644
index 00000000000..2e566350ccd
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/fcf-protection-11.c
@@ -0,0 +1,2 @@
+/* { dg-do compile { target { "i?86-*-* x86_64-*-*" } } } */
+/* { dg-options "-fcf-protection=branch,return" } */
diff --git a/gcc/testsuite/c-c++-common/fcf-protection-12.c
b/gcc/testsuite/c-c++-common/fcf-protection-12.c
new file mode 100644
index 00000000000..b39c2f8e25d
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/fcf-protection-12.c
@@ -0,0 +1,2 @@
+/* { dg-do compile { target { "i?86-*-* x86_64-*-*" } } } */
+/* { dg-options "-fcf-protection=return,branch" } */
diff --git a/gcc/testsuite/c-c++-common/fcf-protection-8.c
b/gcc/testsuite/c-c++-common/fcf-protection-8.c
new file mode 100644
index 00000000000..3b97095a92c
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/fcf-protection-8.c
@@ -0,0 +1,2 @@
+/* { dg-do compile { target { "i?86-*-* x86_64-*-*" } } } */
+/* { dg-options "-fcf-protection=branch,none" } */
diff --git a/gcc/testsuite/c-c++-common/fcf-protection-9.c
b/gcc/testsuite/c-c++-common/fcf-protection-9.c
new file mode 100644
index 00000000000..6a37e749fcb
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/fcf-protection-9.c
@@ -0,0 +1,2 @@
+/* { dg-do compile { target { "i?86-*-* x86_64-*-*" } } } */
+/* { dg-options "-fcf-protection=branch,full" } */
diff --git a/gcc/testsuite/gcc.target/i386/pr89701-1.c
b/gcc/testsuite/gcc.target/i386/pr89701-1.c
new file mode 100644
index 00000000000..1879c9ab4d8
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr89701-1.c
@@ -0,0 +1,4 @@
+/* { dg-do compile { target *-*-linux* } } */
+/* { dg-options "-fcf-protection=branch,return" } */
+/* { dg-final { scan-assembler-times ".note.gnu.property" 1 } } */
+/* { dg-final { scan-assembler-times ".long 0x3" 1 } } */
diff --git a/gcc/testsuite/gcc.target/i386/pr89701-2.c
b/gcc/testsuite/gcc.target/i386/pr89701-2.c
new file mode 100644
index 00000000000..d5100575028
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr89701-2.c
@@ -0,0 +1,4 @@
+/* { dg-do compile { target *-*-linux* } } */
+/* { dg-options "-fcf-protection=return,branch" } */
+/* { dg-final { scan-assembler-times ".note.gnu.property" 1 } } */
+/* { dg-final { scan-assembler-times ".long 0x3" 1 } } */
diff --git a/gcc/testsuite/gcc.target/i386/pr89701-3.c
b/gcc/testsuite/gcc.target/i386/pr89701-3.c
new file mode 100644
index 00000000000..88afb546fbf
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr89701-3.c
@@ -0,0 +1,4 @@
+/* { dg-do compile { target *-*-linux* } } */
+/* { dg-options "-fcf-protection=return,none" } */
+/* { dg-final { scan-assembler-times ".note.gnu.property" 1 } } */
+/* { dg-final { scan-assembler-times ".long 0x2" 1 } } */
--
2.39.1.388.g2fc9e9ca3c
