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llvm-project/clang/test/CodeGen/ubsan-pass-object-size.c

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[ubsan] Use pass_object_size info in bounds checks Teach UBSan's bounds check to opportunistically use pass_object_size information to check array accesses. rdar://33272922 llvm-svn: 320128
2017-12-08 09:51:47 +08:00
// RUN: %clang_cc1 %s -emit-llvm -w -triple x86_64-apple-darwin10 -fsanitize=array-bounds -o - | FileCheck %s
[test] Add {{.*}} to make tests immune to dso_local/dso_preemptable/(none) differences For a definition (of most linkage types), dso_local is set for ELF -fno-pic/-fpie and COFF, but not for Mach-O. This nuance causes unneeded binary format differences. This patch replaces (function) `define ` with `define{{.*}} `, (variable/constant/alias) `= ` with `={{.*}} `, or inserts appropriate `{{.*}} ` if there is an explicit linkage. * Clang will set dso_local for Mach-O, which is currently implied by TargetMachine.cpp. This will make COFF/Mach-O and executable ELF similar. * Eventually I hope we can make dso_local the textual LLVM IR default (write explicit "dso_preemptable" when applicable) and -fpic ELF will be similar to everything else. This patch helps move toward that goal.
2020-12-31 12:45:56 +08:00
// CHECK-LABEL: define{{.*}} i32 @foo(
[ubsan] Use pass_object_size info in bounds checks Teach UBSan's bounds check to opportunistically use pass_object_size information to check array accesses. rdar://33272922 llvm-svn: 320128
2017-12-08 09:51:47 +08:00
int foo(int *const p __attribute__((pass_object_size(0))), int n) {
int x = (p)[n];
// CHECK: [[SIZE_ALLOCA:%.*]] = alloca i64, align 8
// CHECK: store i64 %{{.*}}, i64* [[SIZE_ALLOCA]], align 8
// CHECK: [[LOAD_SIZE:%.*]] = load i64, i64* [[SIZE_ALLOCA]], align 8, !nosanitize
// CHECK-NEXT: [[SCALED_SIZE:%.*]] = udiv i64 [[LOAD_SIZE]], 4, !nosanitize
// CHECK-NEXT: [[SEXT_N:%.*]] = sext i32 %{{.*}} to i64, !nosanitize
// CHECK-NEXT: [[ICMP:%.*]] = icmp ult i64 [[SEXT_N]], [[SCALED_SIZE]], !nosanitize
// CHECK-NEXT: br i1 [[ICMP]], {{.*}} !nosanitize
// CHECK: __ubsan_handle_out_of_bounds
{
int **p = &p; // Shadow the parameter. The pass_object_size info is lost.
// CHECK-NOT: __ubsan_handle_out_of_bounds
x = *p[n];
}
// CHECK: ret i32
return x;
}
typedef struct {} ZeroSizedType;
[test] Add {{.*}} to make tests immune to dso_local/dso_preemptable/(none) differences For a definition (of most linkage types), dso_local is set for ELF -fno-pic/-fpie and COFF, but not for Mach-O. This nuance causes unneeded binary format differences. This patch replaces (function) `define ` with `define{{.*}} `, (variable/constant/alias) `= ` with `={{.*}} `, or inserts appropriate `{{.*}} ` if there is an explicit linkage. * Clang will set dso_local for Mach-O, which is currently implied by TargetMachine.cpp. This will make COFF/Mach-O and executable ELF similar. * Eventually I hope we can make dso_local the textual LLVM IR default (write explicit "dso_preemptable" when applicable) and -fpic ELF will be similar to everything else. This patch helps move toward that goal.
2020-12-31 12:45:56 +08:00
// CHECK-LABEL: define{{.*}} void @bar(
[ubsan] Use pass_object_size info in bounds checks Teach UBSan's bounds check to opportunistically use pass_object_size information to check array accesses. rdar://33272922 llvm-svn: 320128
2017-12-08 09:51:47 +08:00
ZeroSizedType bar(ZeroSizedType *const p __attribute__((pass_object_size(0))), int n) {
// CHECK-NOT: __ubsan_handle_out_of_bounds
// CHECK: ret void
return p[n];
}
[test] Add {{.*}} to make tests immune to dso_local/dso_preemptable/(none) differences For a definition (of most linkage types), dso_local is set for ELF -fno-pic/-fpie and COFF, but not for Mach-O. This nuance causes unneeded binary format differences. This patch replaces (function) `define ` with `define{{.*}} `, (variable/constant/alias) `= ` with `={{.*}} `, or inserts appropriate `{{.*}} ` if there is an explicit linkage. * Clang will set dso_local for Mach-O, which is currently implied by TargetMachine.cpp. This will make COFF/Mach-O and executable ELF similar. * Eventually I hope we can make dso_local the textual LLVM IR default (write explicit "dso_preemptable" when applicable) and -fpic ELF will be similar to everything else. This patch helps move toward that goal.
2020-12-31 12:45:56 +08:00
// CHECK-LABEL: define{{.*}} i32 @baz(
[ubsan] Use pass_object_size info in bounds checks Teach UBSan's bounds check to opportunistically use pass_object_size information to check array accesses. rdar://33272922 llvm-svn: 320128
2017-12-08 09:51:47 +08:00
int baz(int *const p __attribute__((pass_object_size(1))), int n) {
// CHECK: __ubsan_handle_out_of_bounds
// CHECK: ret i32
return p[n];
}
[test] Add {{.*}} to make tests immune to dso_local/dso_preemptable/(none) differences For a definition (of most linkage types), dso_local is set for ELF -fno-pic/-fpie and COFF, but not for Mach-O. This nuance causes unneeded binary format differences. This patch replaces (function) `define ` with `define{{.*}} `, (variable/constant/alias) `= ` with `={{.*}} `, or inserts appropriate `{{.*}} ` if there is an explicit linkage. * Clang will set dso_local for Mach-O, which is currently implied by TargetMachine.cpp. This will make COFF/Mach-O and executable ELF similar. * Eventually I hope we can make dso_local the textual LLVM IR default (write explicit "dso_preemptable" when applicable) and -fpic ELF will be similar to everything else. This patch helps move toward that goal.
2020-12-31 12:45:56 +08:00
// CHECK-LABEL: define{{.*}} i32 @mat(
[ubsan] Use pass_object_size info in bounds checks Teach UBSan's bounds check to opportunistically use pass_object_size information to check array accesses. rdar://33272922 llvm-svn: 320128
2017-12-08 09:51:47 +08:00
int mat(int *const p __attribute__((pass_object_size(2))), int n) {
// CHECK-NOT: __ubsan_handle_out_of_bounds
// CHECK: ret i32
return p[n];
}
[test] Add {{.*}} to make tests immune to dso_local/dso_preemptable/(none) differences For a definition (of most linkage types), dso_local is set for ELF -fno-pic/-fpie and COFF, but not for Mach-O. This nuance causes unneeded binary format differences. This patch replaces (function) `define ` with `define{{.*}} `, (variable/constant/alias) `= ` with `={{.*}} `, or inserts appropriate `{{.*}} ` if there is an explicit linkage. * Clang will set dso_local for Mach-O, which is currently implied by TargetMachine.cpp. This will make COFF/Mach-O and executable ELF similar. * Eventually I hope we can make dso_local the textual LLVM IR default (write explicit "dso_preemptable" when applicable) and -fpic ELF will be similar to everything else. This patch helps move toward that goal.
2020-12-31 12:45:56 +08:00
// CHECK-LABEL: define{{.*}} i32 @pat(
[ubsan] Use pass_object_size info in bounds checks Teach UBSan's bounds check to opportunistically use pass_object_size information to check array accesses. rdar://33272922 llvm-svn: 320128
2017-12-08 09:51:47 +08:00
int pat(int *const p __attribute__((pass_object_size(3))), int n) {
// CHECK-NOT: __ubsan_handle_out_of_bounds
// CHECK: ret i32
return p[n];
}
[test] Add {{.*}} to make tests immune to dso_local/dso_preemptable/(none) differences For a definition (of most linkage types), dso_local is set for ELF -fno-pic/-fpie and COFF, but not for Mach-O. This nuance causes unneeded binary format differences. This patch replaces (function) `define ` with `define{{.*}} `, (variable/constant/alias) `= ` with `={{.*}} `, or inserts appropriate `{{.*}} ` if there is an explicit linkage. * Clang will set dso_local for Mach-O, which is currently implied by TargetMachine.cpp. This will make COFF/Mach-O and executable ELF similar. * Eventually I hope we can make dso_local the textual LLVM IR default (write explicit "dso_preemptable" when applicable) and -fpic ELF will be similar to everything else. This patch helps move toward that goal.
2020-12-31 12:45:56 +08:00
// CHECK-LABEL: define{{.*}} i32 @cat(
[ubsan] Use pass_object_size info in bounds checks Teach UBSan's bounds check to opportunistically use pass_object_size information to check array accesses. rdar://33272922 llvm-svn: 320128
2017-12-08 09:51:47 +08:00
int cat(int p[static 10], int n) {
[ubsan] array-bounds: Ignore params with constant size This is a follow-up to r320128. Eli pointed out that there is some gray area in the language standard about whether the constant size is exact, or a lower bound. https://reviews.llvm.org/D40940 llvm-svn: 320185
2017-12-09 03:51:42 +08:00
// CHECK-NOT: __ubsan_handle_out_of_bounds
[ubsan] Use pass_object_size info in bounds checks Teach UBSan's bounds check to opportunistically use pass_object_size information to check array accesses. rdar://33272922 llvm-svn: 320128
2017-12-08 09:51:47 +08:00
// CHECK: ret i32
return p[n];
}
[test] Add {{.*}} to make tests immune to dso_local/dso_preemptable/(none) differences For a definition (of most linkage types), dso_local is set for ELF -fno-pic/-fpie and COFF, but not for Mach-O. This nuance causes unneeded binary format differences. This patch replaces (function) `define ` with `define{{.*}} `, (variable/constant/alias) `= ` with `={{.*}} `, or inserts appropriate `{{.*}} ` if there is an explicit linkage. * Clang will set dso_local for Mach-O, which is currently implied by TargetMachine.cpp. This will make COFF/Mach-O and executable ELF similar. * Eventually I hope we can make dso_local the textual LLVM IR default (write explicit "dso_preemptable" when applicable) and -fpic ELF will be similar to everything else. This patch helps move toward that goal.
2020-12-31 12:45:56 +08:00
// CHECK-LABEL: define{{.*}} i32 @bat(
[ubsan] Use pass_object_size info in bounds checks Teach UBSan's bounds check to opportunistically use pass_object_size information to check array accesses. rdar://33272922 llvm-svn: 320128
2017-12-08 09:51:47 +08:00
int bat(int n, int p[n]) {
// CHECK-NOT: __ubsan_handle_out_of_bounds
// CHECK: ret i32
return p[n];
}