[llvm] [LLVM] Prefer octal to hex for printf (PR #157884)
Aiden Grossman via llvm-commits
llvm-commits at lists.llvm.org
Wed Sep 10 08:45:45 PDT 2025
https://github.com/boomanaiden154 created https://github.com/llvm/llvm-project/pull/157884
Hex escapes of the form \xff are not universally supported in the printf implementations on the platforms that LLVM runs on (although they apparently are in the shell builtins). Octal escapes are required to be supported by POSIX. This patch converts all hex escapes to octal escapes for compatibility reasons.
This came up when trying to turn on lit's internal shell by default for llvm/. We started using /usr/bin/printf instead of the shell builtin on MacOS, which does not support hex escapes.
I used the following python script to automate most of the conversion with a few manual touchups needed:
```py
import sys
def process_line(to_process: str):
output = ""
i = 0
while i < len(to_process):
if to_process[i:i+2] == '\\x':
hex_string = to_process[i+2:i+4]
number = int(hex_string, 16)
output += "\\"
octal_string = oct(number)[2:]
if len(octal_string) == 1:
octal_string = "00" + octal_string
elif len(octal_string) == 2:
octal_string = "0" + octal_string
assert(len(octal_string) == 3)
output += octal_string
i += 4
else:
output += to_process[i]
i += 1
return output
with open(sys.argv[1]) as input_file:
lines = input_file.readlines()
for i, _ in enumerate(lines):
lines[i] = process_line(lines[i])
with open(sys.argv[1], 'w') as output_file:
output_file.writelines(lines)
```
>From 3b303e71a52c69ac39a736136ba8a93dba3221d8 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman at google.com>
Date: Wed, 10 Sep 2025 15:24:02 +0000
Subject: [PATCH] [LLVM] Prefer octal to hex for printf
Hex escapes of the form \xff are not universally supported in the printf
implementations on the platforms that LLVM runs on (although they
apparently are in the shell builtins). Octal escapes are required to be
supported by POSIX. This patch converts all hex escapes to octal escapes
for compatibility reasons.
This came up when trying to turn on lit's internal shell by default for
llvm/. We started using /usr/bin/printf instead of the shell builtin on
MacOS, which does not support hex escapes.
I used the following python script to automate most of the conversion
with a few manual touchups needed:
```
import sys
def process_line(to_process: str):
output = ""
i = 0
while i < len(to_process):
if to_process[i:i+2] == '\\x':
hex_string = to_process[i+2:i+4]
number = int(hex_string, 16)
output += "\\"
octal_string = oct(number)[2:]
if len(octal_string) == 1:
octal_string = "00" + octal_string
elif len(octal_string) == 2:
octal_string = "0" + octal_string
assert(len(octal_string) == 3)
output += octal_string
i += 4
else:
output += to_process[i]
i += 1
return output
with open(sys.argv[1]) as input_file:
lines = input_file.readlines()
for i, _ in enumerate(lines):
lines[i] = process_line(lines[i])
with open(sys.argv[1], 'w') as output_file:
output_file.writelines(lines)
```
---
llvm/test/tools/llvm-cgdata/empty.test | 10 +++---
llvm/test/tools/llvm-cgdata/error.test | 24 ++++++-------
.../tools/llvm-gsymutil/X86/elf-dwarf.yaml | 2 +-
.../llvm-objcopy/ELF/add-invalid-note.test | 34 +++++++++----------
.../llvm-profdata/binary-ids-padding.test | 2 +-
.../tools/llvm-profdata/raw-32-bits-be.test | 4 +--
.../tools/llvm-profdata/raw-32-bits-le.test | 4 +--
.../tools/llvm-profdata/raw-64-bits-be.test | 4 +--
.../tools/llvm-profdata/raw-64-bits-le.test | 4 +--
.../tools/llvm-strings/negative-char.test | 2 +-
llvm/test/tools/llvm-strings/stdin.test | 4 +--
llvm/test/tools/llvm-symbolizer/basic.s | 4 +--
.../llvm-symbolizer/split-dwarf-dwp.test | 2 +-
llvm/test/tools/sanstats/elf.test | 34 +++++++++----------
14 files changed, 67 insertions(+), 67 deletions(-)
diff --git a/llvm/test/tools/llvm-cgdata/empty.test b/llvm/test/tools/llvm-cgdata/empty.test
index 2082eca58f073..52d0dfb87623f 100644
--- a/llvm/test/tools/llvm-cgdata/empty.test
+++ b/llvm/test/tools/llvm-cgdata/empty.test
@@ -29,9 +29,9 @@ RUN: llvm-cgdata --convert %t_emptyheader.cgdata --format text | count 0
# uint64_t OutlinedHashTreeOffset;
# uint64_t StableFunctionMapOffset;
# }
-RUN: printf '\xffcgdata\x81' > %t_header.cgdata
-RUN: printf '\x04\x00\x00\x00' >> %t_header.cgdata
-RUN: printf '\x00\x00\x00\x00' >> %t_header.cgdata
-RUN: printf '\x20\x00\x00\x00\x00\x00\x00\x00' >> %t_header.cgdata
-RUN: printf '\x20\x00\x00\x00\x00\x00\x00\x00' >> %t_header.cgdata
+RUN: printf '\377cgdata\201' > %t_header.cgdata
+RUN: printf '\004\000\000\000' >> %t_header.cgdata
+RUN: printf '\000\000\000\000' >> %t_header.cgdata
+RUN: printf '\040\000\000\000\000\000\000\000' >> %t_header.cgdata
+RUN: printf '\040\000\000\000\000\000\000\000' >> %t_header.cgdata
RUN: diff %t_header.cgdata %t_emptyheader.cgdata
diff --git a/llvm/test/tools/llvm-cgdata/error.test b/llvm/test/tools/llvm-cgdata/error.test
index 9484371848a72..bf5e3ff6a4ed0 100644
--- a/llvm/test/tools/llvm-cgdata/error.test
+++ b/llvm/test/tools/llvm-cgdata/error.test
@@ -13,29 +13,29 @@ RUN: not llvm-cgdata --show %t_empty.cgdata 2>&1 | FileCheck %s --check-prefix=E
EMPTY: {{.}}cgdata: empty codegen data
# Not a magic.
-RUN: printf '\xff' > %t_malformed.cgdata
+RUN: printf '\377' > %t_malformed.cgdata
RUN: not llvm-cgdata --show %t_malformed.cgdata 2>&1 | FileCheck %s --check-prefix=MALFORMED
MALFORMED: {{.}}cgdata: malformed codegen data
# The minimum header size is 24.
-RUN: printf '\xffcgdata\x81' > %t_corrupt.cgdata
+RUN: printf '\377cgdata\201' > %t_corrupt.cgdata
RUN: not llvm-cgdata --show %t_corrupt.cgdata 2>&1 | FileCheck %s --check-prefix=CORRUPT
CORRUPT: {{.}}cgdata: invalid codegen data (file header is corrupt)
# The current version 4 while the header says 5.
-RUN: printf '\xffcgdata\x81' > %t_version.cgdata
-RUN: printf '\x05\x00\x00\x00' >> %t_version.cgdata
-RUN: printf '\x00\x00\x00\x00' >> %t_version.cgdata
-RUN: printf '\x20\x00\x00\x00\x00\x00\x00\x00' >> %t_version.cgdata
-RUN: printf '\x20\x00\x00\x00\x00\x00\x00\x00' >> %t_version.cgdata
+RUN: printf '\377cgdata\201' > %t_version.cgdata
+RUN: printf '\005\000\000\000' >> %t_version.cgdata
+RUN: printf '\000\000\000\000' >> %t_version.cgdata
+RUN: printf '\040\000\000\000\000\000\000\000' >> %t_version.cgdata
+RUN: printf '\040\000\000\000\000\000\000\000' >> %t_version.cgdata
RUN: not llvm-cgdata --show %t_version.cgdata 2>&1 | FileCheck %s --check-prefix=BAD_VERSION
BAD_VERSION: {{.}}cgdata: unsupported codegen data version
# Header says an outlined hash tree, but the file ends after the header.
-RUN: printf '\xffcgdata\x81' > %t_eof.cgdata
-RUN: printf '\x02\x00\x00\x00' >> %t_eof.cgdata
-RUN: printf '\x01\x00\x00\x00' >> %t_eof.cgdata
-RUN: printf '\x20\x00\x00\x00\x00\x00\x00\x00' >> %t_eof.cgdata
-RUN: printf '\x20\x00\x00\x00\x00\x00\x00\x00' >> %t_eof.cgdata
+RUN: printf '\377cgdata\201' > %t_eof.cgdata
+RUN: printf '\002\000\000\000' >> %t_eof.cgdata
+RUN: printf '\001\000\000\000' >> %t_eof.cgdata
+RUN: printf '\040\000\000\000\000\000\000\000' >> %t_eof.cgdata
+RUN: printf '\040\000\000\000\000\000\000\000' >> %t_eof.cgdata
RUN: not llvm-cgdata --show %t_eof.cgdata 2>&1 | FileCheck %s --check-prefix=EOF
EOF: {{.}}cgdata: end of File
diff --git a/llvm/test/tools/llvm-gsymutil/X86/elf-dwarf.yaml b/llvm/test/tools/llvm-gsymutil/X86/elf-dwarf.yaml
index 78795c62ec3ed..a01d63905cf89 100644
--- a/llvm/test/tools/llvm-gsymutil/X86/elf-dwarf.yaml
+++ b/llvm/test/tools/llvm-gsymutil/X86/elf-dwarf.yaml
@@ -5,7 +5,7 @@
# RUN: yaml2obj %s -o %t
# RUN: llvm-gsymutil --convert %t -o %t.gsym 2>&1 | FileCheck %s --check-prefix=CONVERT
# RUN: llvm-gsymutil --address=0x400391 --address=0x4004cd %t.gsym 2>&1 | FileCheck %s --check-prefix=ADDR
-# RUN: echo -e "0x400391 %/t.gsym\n0x4004cd %/t.gsym" | llvm-gsymutil --addresses-from-stdin 2>&1 | FileCheck %s --check-prefix=ADDRI --dump-input=always
+# RUN: printf "0x400391 %/t.gsym\n0x4004cd %/t.gsym" | llvm-gsymutil --addresses-from-stdin 2>&1 | FileCheck %s --check-prefix=ADDRI --dump-input=always
# RUN: llvm-gsymutil --address=0x400391 --address=0x4004cd --verbose %t.gsym 2>&1 | FileCheck %s --check-prefix=ADDRV --dump-input=always
# RUN: llvm-gsymutil --address=0x400391 --address=0x4004cd --verbose %t.gsym 2>&1 | FileCheck %s --check-prefix=ADDRV --dump-input=always
# RUN: llvm-gsymutil %t.gsym 2>&1 | FileCheck %s --check-prefix=DUMP
diff --git a/llvm/test/tools/llvm-objcopy/ELF/add-invalid-note.test b/llvm/test/tools/llvm-objcopy/ELF/add-invalid-note.test
index 9a28bbb9aa308..d4b535352020c 100644
--- a/llvm/test/tools/llvm-objcopy/ELF/add-invalid-note.test
+++ b/llvm/test/tools/llvm-objcopy/ELF/add-invalid-note.test
@@ -3,22 +3,22 @@
## Add [namesz, descsz, type, name, desc] for a build id.
## Notes should be padded to 8 bytes.
-# RUN: printf "\x04\x00\x00\x00" > %t-miss-padding-note.bin
-# RUN: printf "\x07\x00\x00\x00" >> %t-miss-padding-note.bin
-# RUN: printf "\x03\x00\x00\x00" >> %t-miss-padding-note.bin
-# RUN: printf "GNU\x00" >> %t-miss-padding-note.bin
-# RUN: printf "\x0c\x0d\x0e" >> %t-miss-padding-note.bin
+# RUN: printf "\004\000\000\000" > %t-miss-padding-note.bin
+# RUN: printf "\007\000\000\000" >> %t-miss-padding-note.bin
+# RUN: printf "\003\000\000\000" >> %t-miss-padding-note.bin
+# RUN: printf "GNU\000" >> %t-miss-padding-note.bin
+# RUN: printf "\014\015\016" >> %t-miss-padding-note.bin
## The namesz field bit is incorrect.
-# RUN: printf "\x08\x00\x00\x00" > %t-invalid-size-note.bin
-# RUN: printf "\x07\x00\x00\x00" >> %t-invalid-size-note.bin
-# RUN: printf "\x03\x00\x00\x00" >> %t-invalid-size-note.bin
-# RUN: printf "GNU\x00" >> %t-invalid-size-note.bin
-# RUN: printf "\x0c\x0d\x0e\x00" >> %t-invalid-size-note.bin
+# RUN: printf "\010\000\000\000" > %t-invalid-size-note.bin
+# RUN: printf "\007\000\000\000" >> %t-invalid-size-note.bin
+# RUN: printf "\003\000\000\000" >> %t-invalid-size-note.bin
+# RUN: printf "GNU\000" >> %t-invalid-size-note.bin
+# RUN: printf "\014\015\016\000" >> %t-invalid-size-note.bin
## Missing type field.
-# RUN: printf "\x08\x00\x00\x00" > %t-short-note.bin
-# RUN: printf "\x07\x00\x00\x00" >> %t-short-note.bin
+# RUN: printf "\010\000\000\000" > %t-short-note.bin
+# RUN: printf "\007\000\000\000" >> %t-short-note.bin
# RUN: yaml2obj %s -o %t.o
@@ -33,11 +33,11 @@
# CHECK-SHORT: .note.short data must be either empty or at least 12 bytes long
## Test compatibility with .note.gnu.property, which has 8-byte alignment.
-# RUN: printf "\x04\x00\x00\x00\x40\x00\x00\x00\x05\x00\x00\x00\x47\x4e\x55\x00" > %t-note-gnu-property.bin
-# RUN: printf "\x02\x00\x00\xc0\x04\x00\x00\x00\x03\x00\x00\x00\x00\x00\x00\x00" >> %t-note-gnu-property.bin
-# RUN: printf "\x01\x80\x01\xc0\x04\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00" >> %t-note-gnu-property.bin
-# RUN: printf "\x01\x00\x01\xc0\x04\x00\x00\x00\x0b\x00\x00\x00\x00\x00\x00\x00" >> %t-note-gnu-property.bin
-# RUN: printf "\x02\x00\x01\xc0\x04\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00" >> %t-note-gnu-property.bin
+# RUN: printf "\004\000\000\000\100\000\000\000\005\000\000\000\107\116\125\000" > %t-note-gnu-property.bin
+# RUN: printf "\002\000\000\300\004\000\000\000\003\000\000\000\000\000\000\000" >> %t-note-gnu-property.bin
+# RUN: printf "\001\200\001\300\004\000\000\000\001\000\000\000\000\000\000\000" >> %t-note-gnu-property.bin
+# RUN: printf "\001\000\001\300\004\000\000\000\013\000\000\000\000\000\000\000" >> %t-note-gnu-property.bin
+# RUN: printf "\002\000\001\300\004\000\000\000\001\000\000\000\000\000\000\000" >> %t-note-gnu-property.bin
# RUN: llvm-objcopy --add-section=.note.gnu.property=%t-note-gnu-property.bin %t.o %t-with-note-gnu-property.o
## Test that verification can be disabled.
diff --git a/llvm/test/tools/llvm-profdata/binary-ids-padding.test b/llvm/test/tools/llvm-profdata/binary-ids-padding.test
index 292c582b45c52..cc3e6c38e6907 100644
--- a/llvm/test/tools/llvm-profdata/binary-ids-padding.test
+++ b/llvm/test/tools/llvm-profdata/binary-ids-padding.test
@@ -69,7 +69,7 @@ RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
RUN: printf '\067\265\035\031\112\165\023\344' >> %t.profraw
RUN: printf '\02\0\0\0\0\0\0\0' >> %t.profraw
-RUN: printf '\xc8\xff\3\0\1\0\0\0' >> %t.profraw
+RUN: printf '\310\377\3\0\1\0\0\0' >> %t.profraw
RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
diff --git a/llvm/test/tools/llvm-profdata/raw-32-bits-be.test b/llvm/test/tools/llvm-profdata/raw-32-bits-be.test
index fbd73ae30a5b3..6b3dc96b36270 100644
--- a/llvm/test/tools/llvm-profdata/raw-32-bits-be.test
+++ b/llvm/test/tools/llvm-profdata/raw-32-bits-be.test
@@ -31,8 +31,8 @@ RUN: printf '\0\0\0\3' >> %t
RUN: printf '\344\023\165\112\031\035\265\067' >> %t
RUN: printf '\0\0\0\0\0\0\0\2' >> %t
-RUN: printf '\0\xff\xff\xd8' >> %t
-RUN: printf '\2\xff\xff\xd3' >> %t
+RUN: printf '\0\377\377\330' >> %t
+RUN: printf '\2\377\377\323' >> %t
RUN: printf '\0\0\0\0' >> %t
RUN: printf '\0\0\0\0' >> %t
RUN: printf '\0\0\0\2' >> %t
diff --git a/llvm/test/tools/llvm-profdata/raw-32-bits-le.test b/llvm/test/tools/llvm-profdata/raw-32-bits-le.test
index 91f10fc874586..95625565f5c0c 100644
--- a/llvm/test/tools/llvm-profdata/raw-32-bits-le.test
+++ b/llvm/test/tools/llvm-profdata/raw-32-bits-le.test
@@ -30,8 +30,8 @@ RUN: printf '\3\0\0\0' >> %t
RUN: printf '\067\265\035\031\112\165\023\344' >> %t
RUN: printf '\02\0\0\0\0\0\0\0' >> %t
-RUN: printf '\xd8\xff\xff\0' >> %t
-RUN: printf '\xd3\xff\xff\2' >> %t
+RUN: printf '\330\377\377\0' >> %t
+RUN: printf '\323\377\377\2' >> %t
RUN: printf '\0\0\0\0' >> %t
RUN: printf '\0\0\0\0' >> %t
RUN: printf '\2\0\0\0' >> %t
diff --git a/llvm/test/tools/llvm-profdata/raw-64-bits-be.test b/llvm/test/tools/llvm-profdata/raw-64-bits-be.test
index e7694a1b5a73b..5316ef5a3e559 100644
--- a/llvm/test/tools/llvm-profdata/raw-64-bits-be.test
+++ b/llvm/test/tools/llvm-profdata/raw-64-bits-be.test
@@ -30,8 +30,8 @@ RUN: printf '\0\0\0\3' >> %t
RUN: printf '\344\023\165\112\031\035\265\067' >> %t
RUN: printf '\0\0\0\0\0\0\0\02' >> %t
-RUN: printf '\0\0\0\1\0\3\xff\xc8' >> %t
-RUN: printf '\0\0\0\3\0\3\xff\xc3' >> %t
+RUN: printf '\0\0\0\1\0\3\377\310' >> %t
+RUN: printf '\0\0\0\3\0\3\377\303' >> %t
RUN: printf '\0\0\0\0\0\0\0\0' >> %t
RUN: printf '\0\0\0\0\0\0\0\0' >> %t
RUN: printf '\0\0\0\02' >> %t
diff --git a/llvm/test/tools/llvm-profdata/raw-64-bits-le.test b/llvm/test/tools/llvm-profdata/raw-64-bits-le.test
index 99d486b8a5176..58f4da8cf0386 100644
--- a/llvm/test/tools/llvm-profdata/raw-64-bits-le.test
+++ b/llvm/test/tools/llvm-profdata/raw-64-bits-le.test
@@ -30,8 +30,8 @@ RUN: printf '\3\0\0\0' >> %t
RUN: printf '\067\265\035\031\112\165\023\344' >> %t
RUN: printf '\02\0\0\0\0\0\0\0' >> %t
-RUN: printf '\xc8\xff\3\0\1\0\0\0' >> %t
-RUN: printf '\xc3\xff\3\0\3\0\0\0' >> %t
+RUN: printf '\310\377\3\0\1\0\0\0' >> %t
+RUN: printf '\303\377\3\0\3\0\0\0' >> %t
RUN: printf '\0\0\0\0\0\0\0\0' >> %t
RUN: printf '\0\0\0\0\0\0\0\0' >> %t
RUN: printf '\02\0\0\0' >> %t
diff --git a/llvm/test/tools/llvm-strings/negative-char.test b/llvm/test/tools/llvm-strings/negative-char.test
index 8c60685bf70c1..5154886f9200f 100644
--- a/llvm/test/tools/llvm-strings/negative-char.test
+++ b/llvm/test/tools/llvm-strings/negative-char.test
@@ -1,6 +1,6 @@
## Show that llvm-strings can handle a negative signed char value (i.e. > 0x7f).
## Such characters should form string delimiters like other unprintable ones.
-# RUN: echo -e "z\0\x80\0a\0" | llvm-strings --bytes 1 - | FileCheck %s
+# RUN: printf "z\0\200\0a\0" | llvm-strings --bytes 1 - | FileCheck %s
# CHECK: z{{$}}
# CHECK-NEXT: {{^}}a
diff --git a/llvm/test/tools/llvm-strings/stdin.test b/llvm/test/tools/llvm-strings/stdin.test
index 9af474ca7ea76..06dcd194a3016 100644
--- a/llvm/test/tools/llvm-strings/stdin.test
+++ b/llvm/test/tools/llvm-strings/stdin.test
@@ -8,12 +8,12 @@ CASE1: abcdefg
RUN: echo -n "abc" | llvm-strings - | FileCheck %s --implicit-check-not={{.}} --allow-empty
## Case 3: output with new line.
-RUN: echo -e "abcd\nefgh" | llvm-strings - | FileCheck %s --check-prefix=CASE3 --implicit-check-not={{.}}
+RUN: printf "abcd\nefgh" | llvm-strings - | FileCheck %s --check-prefix=CASE3 --implicit-check-not={{.}}
CASE3: abcd
CASE3-NEXT: efgh
## Case 4: output containing unprintable characters.
-RUN: echo -e "abcd\x00ef\x1fghij\x7fklmn" | llvm-strings - | FileCheck %s --check-prefix=CASE4 --implicit-check-not={{.}}
+RUN: printf "abcd\000ef\037ghij\177klmn" | llvm-strings - | FileCheck %s --check-prefix=CASE4 --implicit-check-not={{.}}
CASE4: abcd
CASE4-NEXT: ghij
CASE4-NEXT: klmn
diff --git a/llvm/test/tools/llvm-symbolizer/basic.s b/llvm/test/tools/llvm-symbolizer/basic.s
index 1a28f14f3eb4a..ac15da9156c01 100644
--- a/llvm/test/tools/llvm-symbolizer/basic.s
+++ b/llvm/test/tools/llvm-symbolizer/basic.s
@@ -8,8 +8,8 @@ foo:
# RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o -g
# Check input addresses specified on stdin.
-# RUN: echo -e "0xa\n0xb" | llvm-symbolizer --obj=%t.o | FileCheck %s
-# RUN: echo -e "10\n11" | llvm-symbolizer --obj=%t.o | FileCheck %s
+# RUN: printf "0xa\n0xb" | llvm-symbolizer --obj=%t.o | FileCheck %s
+# RUN: printf "10\n11" | llvm-symbolizer --obj=%t.o | FileCheck %s
# Check input addresses specified on the command-line.
# RUN: llvm-symbolizer 0xa 0xb --obj=%t.o | FileCheck %s
diff --git a/llvm/test/tools/llvm-symbolizer/split-dwarf-dwp.test b/llvm/test/tools/llvm-symbolizer/split-dwarf-dwp.test
index cadc5592961c7..cac9d9f52648c 100644
--- a/llvm/test/tools/llvm-symbolizer/split-dwarf-dwp.test
+++ b/llvm/test/tools/llvm-symbolizer/split-dwarf-dwp.test
@@ -3,7 +3,7 @@ RUN: mkdir -p %t
RUN: cp %p/Inputs/split-dwarf-dwp.o %t/split-dwarf-dwp-different-name.o
-RUN: echo -e 'DATA 0\n0x54' | \
+RUN: printf 'DATA 0\n0x54' | \
RUN: llvm-symbolizer --dwp=%p/Inputs/split-dwarf-dwp.o.dwp \
RUN: --obj=%t/split-dwarf-dwp-different-name.o | FileCheck %s
diff --git a/llvm/test/tools/sanstats/elf.test b/llvm/test/tools/sanstats/elf.test
index b8f2d5d5b4f99..e230fbdc435fb 100644
--- a/llvm/test/tools/sanstats/elf.test
+++ b/llvm/test/tools/sanstats/elf.test
@@ -1,27 +1,27 @@
# RUN: yaml2obj %s -o %t1.o
# RUN: yaml2obj %s -o %t2.o
-# RUN: printf "\x04" > %t.stats
+# RUN: printf "\004" > %t.stats
# RUN: printf "%%s" "%t1.o" >> %t.stats
-# RUN: printf "\x00" >> %t.stats
-# RUN: printf "\x01\x00\x00\x00\x01\x00\x00\x00" >> %t.stats
-# RUN: printf "\x11\x00\x00\x00\x02\x00\x00\x20" >> %t.stats
-# RUN: printf "\x21\x00\x00\x00\x03\x00\x00\x40" >> %t.stats
-# RUN: printf "\x01\x00\x00\x00\x04\x00\x00\x60" >> %t.stats
-# RUN: printf "\x11\x00\x00\x00\x05\x00\x00\x80" >> %t.stats
-# RUN: printf "\x21\x00\x00\x00\x06\x00\x00\xa0" >> %t.stats
-# RUN: printf "\x00\x00\x00\x00\x00\x00\x00\x00" >> %t.stats
+# RUN: printf "\000" >> %t.stats
+# RUN: printf "\001\000\000\000\001\000\000\000" >> %t.stats
+# RUN: printf "\021\000\000\000\002\000\000\040" >> %t.stats
+# RUN: printf "\041\000\000\000\003\000\000\100" >> %t.stats
+# RUN: printf "\001\000\000\000\004\000\000\140" >> %t.stats
+# RUN: printf "\021\000\000\000\005\000\000\200" >> %t.stats
+# RUN: printf "\041\000\000\000\006\000\000\240" >> %t.stats
+# RUN: printf "\000\000\000\000\000\000\000\000" >> %t.stats
# RUN: printf "%%s" "%t2.o" >> %t.stats
-# RUN: printf "\x00" >> %t.stats
-# RUN: printf "\x21\x00\x00\x00\x07\x00\x00\x00" >> %t.stats
-# RUN: printf "\x11\x00\x00\x00\x08\x00\x00\x20" >> %t.stats
-# RUN: printf "\x01\x00\x00\x00\x09\x00\x00\x40" >> %t.stats
-# RUN: printf "\x21\x00\x00\x00\x0b\x00\x00\x60" >> %t.stats
-# RUN: printf "\x11\x00\x00\x00\x0c\x00\x00\x80" >> %t.stats
-# RUN: printf "\x01\x00\x00\x00\x0e\x00\x00\xa0" >> %t.stats
-# RUN: printf "\x00\x00\x00\x00\x00\x00\x00\x00" >> %t.stats
+# RUN: printf "\000" >> %t.stats
+# RUN: printf "\041\000\000\000\007\000\000\000" >> %t.stats
+# RUN: printf "\021\000\000\000\010\000\000\040" >> %t.stats
+# RUN: printf "\001\000\000\000\011\000\000\100" >> %t.stats
+# RUN: printf "\041\000\000\000\013\000\000\140" >> %t.stats
+# RUN: printf "\021\000\000\000\014\000\000\200" >> %t.stats
+# RUN: printf "\001\000\000\000\016\000\000\240" >> %t.stats
+# RUN: printf "\000\000\000\000\000\000\000\000" >> %t.stats
# RUN: sanstats %t.stats | FileCheck %s
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