lldb cannot change formatting of uint8_t[35] to print as an array of integers

[dmlary]

I've been fighting with this across multiple versions of lldb. I'm trying to print a uint8_t[32] as an array of unsigned integers, but it keeps printing as a binary string. What follows is all the different ways I tried manually setting the format manually to dwim-print, and using type format add. Regardless of what I do, the variable is always formatted as a binary string.

# uint8_t PatternIndex[6][35] = {...}
(lldb) dwim-print -f int8_t[] -- PatternIndex[1]
(const uint8_t[35]) "\0\U00000001\b\U0000001b\"\a\U00000002\U00000003\U00000004\U00000005\U00000006\U0000000e\t\n\v\f\r!\U0000001c\U0000001d\U0000001e\U0000001f \U00000019\U0000001a\U0000000f\U00000010\U00000011\U00000012\U00000013\U00000014\U00000015\U00000016\U00000017\U00000018"
(lldb) dwim-print -f a -- PatternIndex[1]
(const uint8_t[35]) "\0\U00000001\b\U0000001b\"\a\U00000002\U00000003\U00000004\U00000005\U00000006\U0000000e\t\n\v\f\r!\U0000001c\U0000001d\U0000001e\U0000001f \U00000019\U0000001a\U0000000f\U00000010\U00000011\U00000012\U00000013\U00000014\U00000015\U00000016\U00000017\U00000018"
(lldb) dwim-print -f A -- PatternIndex[1]
(const uint8_t[35]) "\0\U00000001\b\U0000001b\"\a\U00000002\U00000003\U00000004\U00000005\U00000006\U0000000e\t\n\v\f\r!\U0000001c\U0000001d\U0000001e\U0000001f \U00000019\U0000001a\U0000000f\U00000010\U00000011\U00000012\U00000013\U00000014\U00000015\U00000016\U00000017\U00000018"
(lldb) type format clear
(lldb) dwim-print -- PatternIndex[1]
(const uint8_t[35]) "\0\U00000001\b\U0000001b\"\a\U00000002\U00000003\U00000004\U00000005\U00000006\U0000000e\t\n\v\f\r!\U0000001c\U0000001d\U0000001e\U0000001f \U00000019\U0000001a\U0000000f\U00000010\U00000011\U00000012\U00000013\U00000014\U00000015\U00000016\U00000017\U00000018"
(lldb) dwim-print -f b -- PatternIndex[1]
(const uint8_t[35]) "\0\U00000001\b\U0000001b\"\a\U00000002\U00000003\U00000004\U00000005\U00000006\U0000000e\t\n\v\f\r!\U0000001c\U0000001d\U0000001e\U0000001f \U00000019\U0000001a\U0000000f\U00000010\U00000011\U00000012\U00000013\U00000014\U00000015\U00000016\U00000017\U00000018"
(lldb) dwim-print -f x -- PatternIndex[1]
(const uint8_t[35]) "\0\U00000001\b\U0000001b\"\a\U00000002\U00000003\U00000004\U00000005\U00000006\U0000000e\t\n\v\f\r!\U0000001c\U0000001d\U0000001e\U0000001f \U00000019\U0000001a\U0000000f\U00000010\U00000011\U00000012\U00000013\U00000014\U00000015\U00000016\U00000017\U00000018"
(lldb) dwim-print -f uint8_t[] -- PatternIndex[1]
(const uint8_t[35]) "\0\U00000001\b\U0000001b\"\a\U00000002\U00000003\U00000004\U00000005\U00000006\U0000000e\t\n\v\f\r!\U0000001c\U0000001d\U0000001e\U0000001f \U00000019\U0000001a\U0000000f\U00000010\U00000011\U00000012\U00000013\U00000014\U00000015\U00000016\U00000017\U00000018"
(lldb) dwim-print -f int -- PatternIndex[1]
(const uint8_t[35]) "\0\U00000001\b\U0000001b\"\a\U00000002\U00000003\U00000004\U00000005\U00000006\U0000000e\t\n\v\f\r!\U0000001c\U0000001d\U0000001e\U0000001f \U00000019\U0000001a\U0000000f\U00000010\U00000011\U00000012\U00000013\U00000014\U00000015\U00000016\U00000017\U00000018"
(lldb) dwim-print -f E -- PatternIndex[1]
(const uint8_t[35]) "\0\U00000001\b\U0000001b\"\a\U00000002\U00000003\U00000004\U00000005\U00000006\U0000000e\t\n\v\f\r!\U0000001c\U0000001d\U0000001e\U0000001f \U00000019\U0000001a\U0000000f\U00000010\U00000011\U00000012\U00000013\U00000014\U00000015\U00000016\U00000017\U00000018"
(lldb) type format add --format int uint8_t
(lldb) dwim-print -- PatternIndex[1]
(const uint8_t[35]) "\0\U00000001\b\U0000001b\"\a\U00000002\U00000003\U00000004\U00000005\U00000006\U0000000e\t\n\v\f\r!\U0000001c\U0000001d\U0000001e\U0000001f \U00000019\U0000001a\U0000000f\U00000010\U00000011\U00000012\U00000013\U00000014\U00000015\U00000016\U00000017\U00000018"
(lldb) type format info PatternIndex[1]
no format applies to (const uint8_t[35]) PatternIndex[1]
(lldb) type format add --format int uint8_t[35]
(lldb) type format info PatternIndex[1]
format applied to (const uint8_t[35]) PatternIndex[1] is: int8_t[]
(lldb) p PatternIndex[1]
(const uint8_t[35]) "\0\U00000001\b\U0000001b\"\a\U00000002\U00000003\U00000004\U00000005\U00000006\U0000000e\t\n\v\f\r!\U0000001c\U0000001d\U0000001e\U0000001f \U00000019\U0000001a\U0000000f\U00000010\U00000011\U00000012\U00000013\U00000014\U00000015\U00000016\U00000017\U00000018"

LLDB versions tested:

• lldb version 20.1.3
• lldb-1600.0.39.10 (Apple clang)

Anyone got a suggestion how to just print it as an array of integer values?

[llvmbot]

@llvm/issue-subscribers-lldb

Author: David M. Lary (dmlary)

I've been fighting with this across multiple versions of lldb. I'm trying to print a `uint8_t[32]` as an array of unsigned integers, but it keeps printing as a binary string. What follows is all the different ways I tried manually setting the format manually to `dwim-print`, and using `type format add`. Regardless of what I do, the variable is always formatted as a binary string.

# uint8_t PatternIndex[6][35] = {...}
(lldb) dwim-print -f int8_t[] -- PatternIndex[1]
(const uint8_t[35]) "\0\U00000001\b\U0000001b\"\a\U00000002\U00000003\U00000004\U00000005\U00000006\U0000000e\t\n\v\f\r!\U0000001c\U0000001d\U0000001e\U0000001f \U00000019\U0000001a\U0000000f\U00000010\U00000011\U00000012\U00000013\U00000014\U00000015\U00000016\U00000017\U00000018"
(lldb) dwim-print -f a -- PatternIndex[1]
(const uint8_t[35]) "\0\U00000001\b\U0000001b\"\a\U00000002\U00000003\U00000004\U00000005\U00000006\U0000000e\t\n\v\f\r!\U0000001c\U0000001d\U0000001e\U0000001f \U00000019\U0000001a\U0000000f\U00000010\U00000011\U00000012\U00000013\U00000014\U00000015\U00000016\U00000017\U00000018"
(lldb) dwim-print -f A -- PatternIndex[1]
(const uint8_t[35]) "\0\U00000001\b\U0000001b\"\a\U00000002\U00000003\U00000004\U00000005\U00000006\U0000000e\t\n\v\f\r!\U0000001c\U0000001d\U0000001e\U0000001f \U00000019\U0000001a\U0000000f\U00000010\U00000011\U00000012\U00000013\U00000014\U00000015\U00000016\U00000017\U00000018"
(lldb) type format clear
(lldb) dwim-print -- PatternIndex[1]
(const uint8_t[35]) "\0\U00000001\b\U0000001b\"\a\U00000002\U00000003\U00000004\U00000005\U00000006\U0000000e\t\n\v\f\r!\U0000001c\U0000001d\U0000001e\U0000001f \U00000019\U0000001a\U0000000f\U00000010\U00000011\U00000012\U00000013\U00000014\U00000015\U00000016\U00000017\U00000018"
(lldb) dwim-print -f b -- PatternIndex[1]
(const uint8_t[35]) "\0\U00000001\b\U0000001b\"\a\U00000002\U00000003\U00000004\U00000005\U00000006\U0000000e\t\n\v\f\r!\U0000001c\U0000001d\U0000001e\U0000001f \U00000019\U0000001a\U0000000f\U00000010\U00000011\U00000012\U00000013\U00000014\U00000015\U00000016\U00000017\U00000018"
(lldb) dwim-print -f x -- PatternIndex[1]
(const uint8_t[35]) "\0\U00000001\b\U0000001b\"\a\U00000002\U00000003\U00000004\U00000005\U00000006\U0000000e\t\n\v\f\r!\U0000001c\U0000001d\U0000001e\U0000001f \U00000019\U0000001a\U0000000f\U00000010\U00000011\U00000012\U00000013\U00000014\U00000015\U00000016\U00000017\U00000018"
(lldb) dwim-print -f uint8_t[] -- PatternIndex[1]
(const uint8_t[35]) "\0\U00000001\b\U0000001b\"\a\U00000002\U00000003\U00000004\U00000005\U00000006\U0000000e\t\n\v\f\r!\U0000001c\U0000001d\U0000001e\U0000001f \U00000019\U0000001a\U0000000f\U00000010\U00000011\U00000012\U00000013\U00000014\U00000015\U00000016\U00000017\U00000018"
(lldb) dwim-print -f int -- PatternIndex[1]
(const uint8_t[35]) "\0\U00000001\b\U0000001b\"\a\U00000002\U00000003\U00000004\U00000005\U00000006\U0000000e\t\n\v\f\r!\U0000001c\U0000001d\U0000001e\U0000001f \U00000019\U0000001a\U0000000f\U00000010\U00000011\U00000012\U00000013\U00000014\U00000015\U00000016\U00000017\U00000018"
(lldb) dwim-print -f E -- PatternIndex[1]
(const uint8_t[35]) "\0\U00000001\b\U0000001b\"\a\U00000002\U00000003\U00000004\U00000005\U00000006\U0000000e\t\n\v\f\r!\U0000001c\U0000001d\U0000001e\U0000001f \U00000019\U0000001a\U0000000f\U00000010\U00000011\U00000012\U00000013\U00000014\U00000015\U00000016\U00000017\U00000018"
(lldb) type format add --format int uint8_t
(lldb) dwim-print -- PatternIndex[1]
(const uint8_t[35]) "\0\U00000001\b\U0000001b\"\a\U00000002\U00000003\U00000004\U00000005\U00000006\U0000000e\t\n\v\f\r!\U0000001c\U0000001d\U0000001e\U0000001f \U00000019\U0000001a\U0000000f\U00000010\U00000011\U00000012\U00000013\U00000014\U00000015\U00000016\U00000017\U00000018"
(lldb) type format info PatternIndex[1]
no format applies to (const uint8_t[35]) PatternIndex[1]
(lldb) type format add --format int uint8_t[35]
(lldb) type format info PatternIndex[1]
format applied to (const uint8_t[35]) PatternIndex[1] is: int8_t[]
(lldb) p PatternIndex[1]
(const uint8_t[35]) "\0\U00000001\b\U0000001b\"\a\U00000002\U00000003\U00000004\U00000005\U00000006\U0000000e\t\n\v\f\r!\U0000001c\U0000001d\U0000001e\U0000001f \U00000019\U0000001a\U0000000f\U00000010\U00000011\U00000012\U00000013\U00000014\U00000015\U00000016\U00000017\U00000018"

LLDB versions tested:

• lldb version 20.1.3
• lldb-1600.0.39.10 (Apple clang)

Anyone got a suggestion how to just print it as an array of integer values?

[DavidSpickett]

I tried this on Linux and also couldn't find a way to stop lldb making it into characters. uint8_t being unsigned char behind the scenes is something it doesn't want to let go of.

@kastiglione worked in dwim-print, maybe they can help.

[jimingham]

The summary formatter is getting in your way, so that's what you need to turn off. Easiest way to do that is:

(lldb) expr --raw -- my_array
(uint8_t[35]) $0 = {
  [0] = '\0'
  [1] = '\x01'
  [2] = '\x02'
  [3] = '\x03'
  [4] = '\x04'
  [5] = '\x05'
  [6] = '\x06'
  [7] = '\a'
  [8] = '\b'
  [9] = '\t'
  ...

[jimingham]

Changing the formatting options is basically saying "If you WERE to print the children of this array, how would you print them". But the summary formatter says "don't print the children", which makes moot how to format them.

We'd have to have summary formatters that only triggered if the value formatting were equal to some expected value? Anyway, we don't have such a setup today.