6b3351792c
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.
69 lines
2.0 KiB
C
69 lines
2.0 KiB
C
// RUN: %clang_cc1 %s -emit-llvm -w -triple x86_64-apple-darwin10 -fsanitize=array-bounds -o - | FileCheck %s
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// CHECK-LABEL: define{{.*}} i32 @foo(
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int foo(int *const p __attribute__((pass_object_size(0))), int n) {
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int x = (p)[n];
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// CHECK: [[SIZE_ALLOCA:%.*]] = alloca i64, align 8
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// CHECK: store i64 %{{.*}}, i64* [[SIZE_ALLOCA]], align 8
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// CHECK: [[LOAD_SIZE:%.*]] = load i64, i64* [[SIZE_ALLOCA]], align 8, !nosanitize
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// CHECK-NEXT: [[SCALED_SIZE:%.*]] = udiv i64 [[LOAD_SIZE]], 4, !nosanitize
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// CHECK-NEXT: [[SEXT_N:%.*]] = sext i32 %{{.*}} to i64, !nosanitize
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// CHECK-NEXT: [[ICMP:%.*]] = icmp ult i64 [[SEXT_N]], [[SCALED_SIZE]], !nosanitize
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// CHECK-NEXT: br i1 [[ICMP]], {{.*}} !nosanitize
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// CHECK: __ubsan_handle_out_of_bounds
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{
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int **p = &p; // Shadow the parameter. The pass_object_size info is lost.
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// CHECK-NOT: __ubsan_handle_out_of_bounds
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x = *p[n];
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}
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// CHECK: ret i32
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return x;
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}
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typedef struct {} ZeroSizedType;
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// CHECK-LABEL: define{{.*}} void @bar(
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ZeroSizedType bar(ZeroSizedType *const p __attribute__((pass_object_size(0))), int n) {
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// CHECK-NOT: __ubsan_handle_out_of_bounds
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// CHECK: ret void
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return p[n];
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}
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// CHECK-LABEL: define{{.*}} i32 @baz(
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int baz(int *const p __attribute__((pass_object_size(1))), int n) {
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// CHECK: __ubsan_handle_out_of_bounds
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// CHECK: ret i32
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return p[n];
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}
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// CHECK-LABEL: define{{.*}} i32 @mat(
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int mat(int *const p __attribute__((pass_object_size(2))), int n) {
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// CHECK-NOT: __ubsan_handle_out_of_bounds
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// CHECK: ret i32
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return p[n];
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}
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// CHECK-LABEL: define{{.*}} i32 @pat(
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int pat(int *const p __attribute__((pass_object_size(3))), int n) {
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// CHECK-NOT: __ubsan_handle_out_of_bounds
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// CHECK: ret i32
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return p[n];
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}
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// CHECK-LABEL: define{{.*}} i32 @cat(
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int cat(int p[static 10], int n) {
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// CHECK-NOT: __ubsan_handle_out_of_bounds
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// CHECK: ret i32
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return p[n];
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}
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// CHECK-LABEL: define{{.*}} i32 @bat(
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int bat(int n, int p[n]) {
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// CHECK-NOT: __ubsan_handle_out_of_bounds
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// CHECK: ret i32
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return p[n];
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}
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