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65df098609
Summary: Keeping msan a function pass requires replacing the module level initialization: That means, don't define a ctor function which calls __msan_init, instead just declare the init function at the first access, and add that to the global ctors list. Changes: - Pull the actual sanitizer and the wrapper pass apart. - Add a newpm msan pass. The function pass inserts calls to runtime library functions, for which it inserts declarations as necessary. - Update tests. Caveats: - There is one test that I dropped, because it specifically tested the definition of the ctor. Reviewers: chandlerc, fedor.sergeev, leonardchan, vitalybuka Subscribers: sdardis, nemanjai, javed.absar, hiraditya, kbarton, bollu, atanasyan, jsji Differential Revision: https://reviews.llvm.org/D55647 llvm-svn: 350305
35 lines
1.3 KiB
LLVM
35 lines
1.3 KiB
LLVM
; Test marking string functions as nobuiltin in memory sanitizer.
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;
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; RUN: opt < %s -S -passes=msan 2>&1 | FileCheck %s
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; RUN: opt < %s -msan -S | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
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target triple = "x86_64-unknown-linux-gnu"
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declare i8* @memchr(i8* %a, i32 %b, i64 %c)
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declare i32 @memcmp(i8* %a, i8* %b, i64 %c)
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declare i32 @strcmp(i8* %a, i8* %b)
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declare i8* @strcpy(i8* %a, i8* %b)
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declare i8* @stpcpy(i8* %a, i8* %b)
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declare i64 @strlen(i8* %a)
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declare i64 @strnlen(i8* %a, i64 %b)
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; CHECK: call{{.*}}@memchr{{.*}} #[[ATTR:[0-9]+]]
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; CHECK: call{{.*}}@memcmp{{.*}} #[[ATTR]]
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; CHECK: call{{.*}}@strcmp{{.*}} #[[ATTR]]
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; CHECK: call{{.*}}@strcpy{{.*}} #[[ATTR]]
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; CHECK: call{{.*}}@stpcpy{{.*}} #[[ATTR]]
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; CHECK: call{{.*}}@strlen{{.*}} #[[ATTR]]
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; CHECK: call{{.*}}@strnlen{{.*}} #[[ATTR]]
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; attributes #[[ATTR]] = { nobuiltin }
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define void @f1(i8* %a, i8* %b) nounwind uwtable sanitize_memory {
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tail call i8* @memchr(i8* %a, i32 1, i64 12)
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tail call i32 @memcmp(i8* %a, i8* %b, i64 12)
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tail call i32 @strcmp(i8* %a, i8* %b)
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tail call i8* @strcpy(i8* %a, i8* %b)
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tail call i8* @stpcpy(i8* %a, i8* %b)
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tail call i64 @strlen(i8* %a)
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tail call i64 @strnlen(i8* %a, i64 12)
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ret void
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}
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