dbc641deb9
Currently 1 byte global object has a ridiculous 63 bytes redzone. This patch reduces the redzone size to be less than 32 if the size of global object is less than or equal to half of 32 (the minimal size of redzone). A 12 bytes object has a 20 bytes redzone, a 20 bytes object has a 44 bytes redzone. Reviewed By: MaskRay, #sanitizers, vitalybuka Differential Revision: https://reviews.llvm.org/D102469
82 lines
5.3 KiB
C++
82 lines
5.3 KiB
C++
// RUN: echo "int extra_global;" > %t.extra-source.cpp
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// RUN: echo "global:*blacklisted_global*" > %t.blacklist
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// RUN: %clang_cc1 -include %t.extra-source.cpp -fsanitize=address -fsanitize-blacklist=%t.blacklist -emit-llvm -o - %s | FileCheck %s --check-prefixes=CHECK,ASAN
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// RUN: %clang_cc1 -include %t.extra-source.cpp -fsanitize=kernel-address -fsanitize-blacklist=%t.blacklist -emit-llvm -o - %s | FileCheck %s --check-prefixes=CHECK,KASAN
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// The blacklist file uses regexps, so Windows path backslashes.
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// RUN: echo "src:%s" | sed -e 's/\\/\\\\/g' > %t.blacklist-src
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// RUN: %clang_cc1 -include %t.extra-source.cpp -fsanitize=address -fsanitize-blacklist=%t.blacklist-src -emit-llvm -o - %s | FileCheck %s --check-prefix=BLACKLIST-SRC
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// RUN: %clang_cc1 -include %t.extra-source.cpp -fsanitize=kernel-address -fsanitize-blacklist=%t.blacklist-src -emit-llvm -o - %s | FileCheck %s --check-prefix=BLACKLIST-SRC
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int global;
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int dyn_init_global = global;
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int __attribute__((no_sanitize("address"))) attributed_global;
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int blacklisted_global;
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int __attribute__((section("__DATA, __common"))) sectioned_global; // KASAN - ignore globals in a section
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extern "C" {
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int __special_global; // KASAN - ignore globals with __-prefix
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}
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void func() {
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static int static_var = 0;
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const char *literal = "Hello, world!";
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}
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// ASAN: sectioned_global{{.*}} global { i32, [28 x i8] }{{.*}}, align 32
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// KASAN: sectioned_global{{.*}} global i32
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// ASAN: @__special_global{{.*}} global { i32, [28 x i8] }{{.*}}, align 32
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// KASAN: @__special_global{{.*}} global i32
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/// Without -fasynchronous-unwind-tables, ctor and dtor get the uwtable attribute.
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// CHECK-LABEL: define internal void @asan.module_ctor() #[[#ATTR:]] {
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// ASAN-NEXT: call void @__asan_init
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// ASAN-NEXT: call void @__asan_version_mismatch_check
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// KASAN-NOT: call void @__asan_init
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// KASAN-NOT: call void @__asan_version_mismatch_check
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// ASAN-NEXT: call void @__asan_register_globals({{.*}}, i{{32|64}} 7)
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// KASAN-NEXT: call void @__asan_register_globals({{.*}}, i{{32|64}} 5)
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// CHECK-NEXT: ret void
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// CHECK: define internal void @asan.module_dtor() #[[#ATTR]] {
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// CHECK-NEXT: call void @__asan_unregister_globals
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// CHECK-NEXT: ret void
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// CHECK: attributes #[[#ATTR]] = { nounwind }
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/// If -fasynchronous-unwind-tables, set the module flag "uwtable". ctor/dtor
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/// will thus get the uwtable attribute.
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// RUN: %clang_cc1 -emit-llvm -fsanitize=address -munwind-tables -o - %s | FileCheck %s --check-prefixes=UWTABLE
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// UWTABLE: define internal void @asan.module_dtor() #[[#ATTR:]] {
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// UWTABLE: attributes #[[#ATTR]] = { nounwind uwtable }
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// UWTABLE: ![[#]] = !{i32 7, !"uwtable", i32 1}
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// CHECK: !llvm.asan.globals = !{![[EXTRA_GLOBAL:[0-9]+]], ![[GLOBAL:[0-9]+]], ![[DYN_INIT_GLOBAL:[0-9]+]], ![[ATTR_GLOBAL:[0-9]+]], ![[BLACKLISTED_GLOBAL:[0-9]+]], ![[SECTIONED_GLOBAL:[0-9]+]], ![[SPECIAL_GLOBAL:[0-9]+]], ![[STATIC_VAR:[0-9]+]], ![[LITERAL:[0-9]+]]}
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// CHECK: ![[EXTRA_GLOBAL]] = !{{{.*}} ![[EXTRA_GLOBAL_LOC:[0-9]+]], !"extra_global", i1 false, i1 false}
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// CHECK: ![[EXTRA_GLOBAL_LOC]] = !{!"{{.*}}extra-source.cpp", i32 1, i32 5}
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// CHECK: ![[GLOBAL]] = !{{{.*}} ![[GLOBAL_LOC:[0-9]+]], !"global", i1 false, i1 false}
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// CHECK: ![[GLOBAL_LOC]] = !{!"{{.*}}asan-globals.cpp", i32 10, i32 5}
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// CHECK: ![[DYN_INIT_GLOBAL]] = !{{{.*}} ![[DYN_INIT_LOC:[0-9]+]], !"dyn_init_global", i1 true, i1 false}
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// CHECK: ![[DYN_INIT_LOC]] = !{!"{{.*}}asan-globals.cpp", i32 11, i32 5}
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// CHECK: ![[ATTR_GLOBAL]] = !{{{.*}}, null, null, i1 false, i1 true}
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// CHECK: ![[BLACKLISTED_GLOBAL]] = !{{{.*}}, null, null, i1 false, i1 true}
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// CHECK: ![[SECTIONED_GLOBAL]] = !{{{.*}} ![[SECTIONED_GLOBAL_LOC:[0-9]+]], !"sectioned_global", i1 false, i1 false}
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// CHECK: ![[SECTIONED_GLOBAL_LOC]] = !{!"{{.*}}asan-globals.cpp", i32 15, i32 50}
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// CHECK: ![[SPECIAL_GLOBAL]] = !{{{.*}} ![[SPECIAL_GLOBAL_LOC:[0-9]+]], !"__special_global", i1 false, i1 false}
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// CHECK: ![[SPECIAL_GLOBAL_LOC]] = !{!"{{.*}}asan-globals.cpp", i32 17, i32 5}
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// CHECK: ![[STATIC_VAR]] = !{{{.*}} ![[STATIC_LOC:[0-9]+]], !"static_var", i1 false, i1 false}
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// CHECK: ![[STATIC_LOC]] = !{!"{{.*}}asan-globals.cpp", i32 21, i32 14}
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// CHECK: ![[LITERAL]] = !{{{.*}} ![[LITERAL_LOC:[0-9]+]], !"<string literal>", i1 false, i1 false}
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// CHECK: ![[LITERAL_LOC]] = !{!"{{.*}}asan-globals.cpp", i32 22, i32 25}
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// BLACKLIST-SRC: !llvm.asan.globals = !{![[EXTRA_GLOBAL:[0-9]+]], ![[GLOBAL:[0-9]+]], ![[DYN_INIT_GLOBAL:[0-9]+]], ![[ATTR_GLOBAL:[0-9]+]], ![[BLACKLISTED_GLOBAL:[0-9]+]], ![[SECTIONED_GLOBAL:[0-9]+]], ![[SPECIAL_GLOBAL:[0-9]+]], ![[STATIC_VAR:[0-9]+]], ![[LITERAL:[0-9]+]]}
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// BLACKLIST-SRC: ![[EXTRA_GLOBAL]] = !{{{.*}} ![[EXTRA_GLOBAL_LOC:[0-9]+]], !"extra_global", i1 false, i1 false}
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// BLACKLIST-SRC: ![[EXTRA_GLOBAL_LOC]] = !{!"{{.*}}extra-source.cpp", i32 1, i32 5}
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// BLACKLIST-SRC: ![[GLOBAL]] = !{{{.*}} null, null, i1 false, i1 true}
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// BLACKLIST-SRC: ![[DYN_INIT_GLOBAL]] = !{{{.*}} null, null, i1 true, i1 true}
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// BLACKLIST-SRC: ![[ATTR_GLOBAL]] = !{{{.*}}, null, null, i1 false, i1 true}
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// BLACKLIST-SRC: ![[BLACKLISTED_GLOBAL]] = !{{{.*}}, null, null, i1 false, i1 true}
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// BLACKLIST-SRC: ![[SECTIONED_GLOBAL]] = !{{{.*}} null, null, i1 false, i1 true}
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// BLACKLIST-SRC: ![[SPECIAL_GLOBAL]] = !{{{.*}} null, null, i1 false, i1 true}
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// BLACKLIST-SRC: ![[STATIC_VAR]] = !{{{.*}} null, null, i1 false, i1 true}
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// BLACKLIST-SRC: ![[LITERAL]] = !{{{.*}} null, null, i1 false, i1 true}
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