mirror of
https://github.com/rust-lang/rust.git
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fb2d9cdfc5
Summary: I landed a fix last year to enable `DW_TAG_variant_part` encoding in LLDBs (https://reviews.llvm.org/D149213). This PR is a corresponding fix in synthetic formatters to decode that information. This is in no way perfect implementation but at least it improves the status quo. But most types of enums will be visible and debuggable in some way. I've also updated most of the existing tests that touch enums and re-enabled test cases based on LLDB for enums. Test Plan: ran tests `./x test tests/debuginfo/`. Also tested manually in LLDB CLI and LLDB VSCode Other Thoughs A better approach would probably be adopting [formatters from codelldb](https://github.com/vadimcn/codelldb/blob/master/formatters/rust.py). There is some neat hack that hooks up summary provider via synthetic provider which can ultimately fix more display issues for Rust types and enums too. But getting it to work well might take more time that I have right now.
322 lines
13 KiB
Rust
322 lines
13 KiB
Rust
//@ min-lldb-version: 1800
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//@ ignore-gdb
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//@ compile-flags:-g
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// === LLDB TESTS ==================================================================================
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// lldb-command:run
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// lldb-command:v a
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// lldbg-check:(core::option::Option<msvc_pretty_enums::CStyleEnum>) a = { value = { 0 = Low } }
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// lldb-command:v b
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// lldbg-check:(core::option::Option<msvc_pretty_enums::CStyleEnum>) b = { value = $discr$ = '\x01' }
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// lldb-command:v c
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// lldbg-check:(msvc_pretty_enums::NicheLayoutEnum) c = { value = $discr$ = '\x11' }
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// lldb-command:v d
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// lldbg-check:(msvc_pretty_enums::NicheLayoutEnum) d = { value = { my_data = High } }
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// lldb-command:v e
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// lldbg-check:(msvc_pretty_enums::NicheLayoutEnum) e = { value = $discr$ = '\x13' }
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// lldb-command:v h
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// lldbg-check:(core::option::Option<u32>) h = { value = { 0 = 12 } $discr$ = 1 }
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// lldb-command:v i
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// lldbg-check:(core::option::Option<u32>) i = { value = $discr$ = 0 }
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// lldb-command:v j
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// lldbg-check:(msvc_pretty_enums::CStyleEnum) j = High
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// lldb-command:v k
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// lldbg-check:(core::option::Option<alloc::string::String>) k = { value = { 0 = "IAMA optional string!" { vec = size=21 { [0] = 'I' [1] = 'A' [2] = 'M' [3] = 'A' [4] = ' ' [5] = 'o' [6] = 'p' [7] = 't' [8] = 'i' [9] = 'o' [10] = 'n' [11] = 'a' [12] = 'l' [13] = ' ' [14] = 's' [15] = 't' [16] = 'r' [17] = 'i' [18] = 'n' [19] = 'g' [20] = '!' } } } }
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// lldb-command:v l
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// lldbg-check:(core::result::Result<u32, msvc_pretty_enums::Empty>) l = { value = { 0 = {} } }
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// lldb-command:v niche128_some
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// lldbg-check:(core::option::Option<core::num::nonzero::NonZero<i128>>) niche128_some = { value = $discr$ = 123456 }
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// lldb-command:v niche128_none
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// lldbg-check:(core::option::Option<core::num::nonzero::NonZero<i128>>) niche128_none = { value = $discr$ = 0 }
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// lldb-command:v wrapping_niche128_untagged
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// lldbg-check:(msvc_pretty_enums::Wrapping128Niche) wrapping_niche128_untagged = { value = { 0 = { 0 = 340282366920938463463374607431768211454 } } }
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// lldb-command:v wrapping_niche128_none1
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// lldbg-check:(msvc_pretty_enums::Wrapping128Niche) wrapping_niche128_none1 = { value = { 0 = { 0 = 2 } } }
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// lldb-command:v direct_tag_128_a
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// lldbg-check:(msvc_pretty_enums::DirectTag128) direct_tag_128_a = { value = { 0 = 42 } $discr$ = 0 }
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// lldb-command:v direct_tag_128_b
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// lldbg-check:(msvc_pretty_enums::DirectTag128) direct_tag_128_b = { value = { 0 = 137 } $discr$ = 1 }
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// &u32 is incorrectly formatted and LLDB thinks it's a char* so skipping niche_w_fields_1_some
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// lldb-command:v niche_w_fields_1_none
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// lldbg-check:(msvc_pretty_enums::NicheLayoutWithFields1) niche_w_fields_1_none = { value = { 0 = 99 } $discr$ = 1 }
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// lldb-command:v niche_w_fields_2_some
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// lldbg-check:(msvc_pretty_enums::NicheLayoutWithFields2) niche_w_fields_2_some = { value = { 0 = 800 { __0 = { 0 = 800 } } 1 = 900 } $discr$ = 0 }
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// lldb-command:v niche_w_fields_3_some
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// lldbg-check:(msvc_pretty_enums::NicheLayoutWithFields3) niche_w_fields_3_some = { value = { 0 = '\x89' 1 = true } }
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// lldb-command:v niche_w_fields_3_niche3
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// lldbg-check:(msvc_pretty_enums::NicheLayoutWithFields3) niche_w_fields_3_niche3 = { value = { 0 = '"' } $discr$ = '\x04' }
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// lldb-command:v arbitrary_discr1
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// lldbg-check:(msvc_pretty_enums::ArbitraryDiscr) arbitrary_discr1 = { value = { 0 = 1234 } $discr$ = 1000 }
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// lldb-command:v arbitrary_discr2
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// lldbg-check:(msvc_pretty_enums::ArbitraryDiscr) arbitrary_discr2 = { value = { 0 = 5678 } $discr$ = 5000000 }
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// === CDB TESTS ==================================================================================
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// cdb-command: g
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//
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// cdb-command: dx a
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// cdb-check:a : Some [Type: enum2$<core::option::Option<msvc_pretty_enums::CStyleEnum> >]
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// cdb-check: [+0x000] __0 : Low (0x2) [Type: msvc_pretty_enums::CStyleEnum]
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//
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// cdb-command: dx b
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// cdb-check:b : None [Type: enum2$<core::option::Option<msvc_pretty_enums::CStyleEnum> >]
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//
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// cdb-command: dx c
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// cdb-check:c : Tag1 [Type: enum2$<msvc_pretty_enums::NicheLayoutEnum>]
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//
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// cdb-command: dx d
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// cdb-check:d : Data [Type: enum2$<msvc_pretty_enums::NicheLayoutEnum>]
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// cdb-check: [+0x000] my_data : High (0x10) [Type: msvc_pretty_enums::CStyleEnum]
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//
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// cdb-command: dx e
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// cdb-check:e : Tag2 [Type: enum2$<msvc_pretty_enums::NicheLayoutEnum>]
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//
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// cdb-command: dx f
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// cdb-check:f : Some [Type: enum2$<core::option::Option<ref$<u32> > >]
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// cdb-check: [+0x000] __0 : 0x[...] : 0x1 [Type: unsigned int *]
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//
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// cdb-command: dx g
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// cdb-check:g : None [Type: enum2$<core::option::Option<ref$<u32> > >]
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//
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// cdb-command: dx h
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// cdb-check:h : Some [Type: enum2$<core::option::Option<u32> >]
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// cdb-check: [+0x004] __0 : 0xc [Type: unsigned int]
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//
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// cdb-command: dx i
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// cdb-check:i : None [Type: enum2$<core::option::Option<u32> >]
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//
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// cdb-command: dx j
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// cdb-check:j : High (0x10) [Type: msvc_pretty_enums::CStyleEnum]
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//
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// cdb-command: dx k
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// cdb-check:k : Some [Type: enum2$<core::option::Option<alloc::string::String> >]
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// cdb-check: [+0x000] __0 : "IAMA optional string!" [Type: alloc::string::String]
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//
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// cdb-command: dx l
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// cdb-check:l : Ok [Type: enum2$<core::result::Result<u32,enum2$<msvc_pretty_enums::Empty> > >]
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// cdb-check: [+0x000] __0 : 0x2a [Type: unsigned int]
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//
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// cdb-command: dx niche128_some
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// cdb-check: niche128_some : Some [Type: enum2$<core::option::Option<core::num::nonzero::NonZero<i128> > >]
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// Note: we can't actually read the value of the field because CDB cannot handle 128 bit integers.
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// cdb-check: [+0x000] __0 [...] [Type: core::num::nonzero::NonZero<i128>]
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//
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// cdb-command: dx niche128_none
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// cdb-check: niche128_none : None [Type: enum2$<core::option::Option<core::num::nonzero::NonZero<i128> > >]
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//
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// cdb-command: dx wrapping_niche128_untagged
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// cdb-check: wrapping_niche128_untagged : X [Type: enum2$<msvc_pretty_enums::Wrapping128Niche>]
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// cdb-check: [+0x[...]] __0 [Type: msvc_pretty_enums::Wrapping128]
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//
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// cdb-command: dx wrapping_niche128_none1
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// cdb-check: wrapping_niche128_none1 : Y [Type: enum2$<msvc_pretty_enums::Wrapping128Niche>]
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// cdb-check: [+0x[...]] __0 [Type: msvc_pretty_enums::Wrapping128]
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//
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// cdb-command: dx wrapping_niche128_none2
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// cdb-check: wrapping_niche128_none2 : Z [Type: enum2$<msvc_pretty_enums::Wrapping128Niche>]
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// cdb-check: [+0x[...]] __0 [Type: msvc_pretty_enums::Wrapping128]
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//
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// cdb-command: dx direct_tag_128_a,d
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// cdb-check: direct_tag_128_a,d : A [Type: enum2$<msvc_pretty_enums::DirectTag128>]
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// cdb-check: [+0x[...]] __0 : 42 [Type: unsigned int]
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//
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// cdb-command: dx direct_tag_128_b,d
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// cdb-check: direct_tag_128_b,d : B [Type: enum2$<msvc_pretty_enums::DirectTag128>]
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// cdb-check: [+0x[...]] __0 : 137 [Type: unsigned int]
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//
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// cdb-command: dx niche_w_fields_1_some,d
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// cdb-check: niche_w_fields_1_some,d : A [Type: enum2$<msvc_pretty_enums::NicheLayoutWithFields1>]
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// cdb-check: [+0x[...]] __0 : 0x[...] : 77 [Type: unsigned char *]
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// cdb-check: [+0x[...]] __1 : 7 [Type: unsigned int]
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//
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// cdb-command: dx niche_w_fields_1_none,d
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// cdb-check: niche_w_fields_1_none,d : B [Type: enum2$<msvc_pretty_enums::NicheLayoutWithFields1>]
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// cdb-check: [+0x[...]] __0 : 99 [Type: unsigned int]
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//
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// cdb-command: dx niche_w_fields_2_some,d
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// cdb-check: niche_w_fields_2_some,d : A [Type: enum2$<msvc_pretty_enums::NicheLayoutWithFields2>]
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// cdb-check: [+0x[...]] __0 : 800 [Type: core::num::nonzero::NonZero<u32>]
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// cdb-check: [+0x[...]] __1 : 900 [Type: unsigned __int64]
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//
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// cdb-command: dx niche_w_fields_2_none,d
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// cdb-check: niche_w_fields_2_none,d : B [Type: enum2$<msvc_pretty_enums::NicheLayoutWithFields2>]
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// cdb-check: [+0x[...]] __0 : 1000 [Type: unsigned __int64]
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//
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// cdb-command: dx niche_w_fields_3_some,d
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// cdb-check: niche_w_fields_3_some,d : A [Type: enum2$<msvc_pretty_enums::NicheLayoutWithFields3>]
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// cdb-check: [+0x[...]] __0 : 137 [Type: unsigned char]
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// cdb-check: [+0x[...]] __1 : true [Type: bool]
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//
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// cdb-command: dx niche_w_fields_3_niche1,d
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// cdb-check: niche_w_fields_3_niche1,d : B [Type: enum2$<msvc_pretty_enums::NicheLayoutWithFields3>]
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// cdb-check: [+0x[...]] __0 : 12 [Type: unsigned char]
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//
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// cdb-command: dx niche_w_fields_3_niche2,d
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// cdb-check: niche_w_fields_3_niche2,d : C [Type: enum2$<msvc_pretty_enums::NicheLayoutWithFields3>]
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// cdb-check: [+0x[...]] __0 : false [Type: bool]
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//
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// cdb-command: dx niche_w_fields_3_niche3,d
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// cdb-check: niche_w_fields_3_niche3,d : D [Type: enum2$<msvc_pretty_enums::NicheLayoutWithFields3>]
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// cdb-check: [+0x[...]] __0 : 34 [Type: unsigned char]
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//
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// cdb-command: dx niche_w_fields_3_niche4,d
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// cdb-check: niche_w_fields_3_niche4,d : E [Type: enum2$<msvc_pretty_enums::NicheLayoutWithFields3>]
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// cdb-check: [+0x[...]] __0 : 56 [Type: unsigned char]
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//
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// cdb-command: dx niche_w_fields_3_niche5,d
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// cdb-check: niche_w_fields_3_niche5,d : F [Type: enum2$<msvc_pretty_enums::NicheLayoutWithFields3>]
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//
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// cdb-command: dx -r3 niche_w_fields_std_result_ok,d
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// cdb-check: niche_w_fields_std_result_ok,d : Ok [Type: enum2$<core::result::Result<alloc::boxed::Box<slice2$<u8>,alloc::alloc::Global>,u64> >]
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// cdb-check: [+0x[...]] __0 [Type: alloc::boxed::Box<slice2$<u8>,alloc::alloc::Global>]
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// cdb-check: [+0x[...]] data_ptr : [...]
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// cdb-check: [+0x[...]] length : 3 [...]
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//
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// cdb-command: dx -r3 niche_w_fields_std_result_err,d
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// cdb-check: niche_w_fields_std_result_err,d : Err [Type: enum2$<core::result::Result<alloc::boxed::Box<slice2$<u8>,alloc::alloc::Global>,u64> >]
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// cdb-check: [+0x[...]] __0 : 789 [Type: unsigned __int64]
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//
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// cdb-command: dx -r2 arbitrary_discr1,d
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// cdb-check: arbitrary_discr1,d : Abc [Type: enum2$<msvc_pretty_enums::ArbitraryDiscr>]
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// cdb-check: [+0x[...]] __0 : 1234 [Type: unsigned int]
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//
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// cdb-command: dx -r2 arbitrary_discr2,d
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// cdb-check: arbitrary_discr2,d : Def [Type: enum2$<msvc_pretty_enums::ArbitraryDiscr>]
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// cdb-check: [+0x[...]] __0 : 5678 [Type: unsigned int]
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#![feature(rustc_attrs)]
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#![feature(repr128)]
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#![feature(arbitrary_enum_discriminant)]
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use std::num::NonZero;
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pub enum CStyleEnum {
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Low = 2,
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High = 16,
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}
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pub enum NicheLayoutEnum {
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Tag1,
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Data { my_data: CStyleEnum },
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Tag2,
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}
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pub enum Empty {}
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// The following three types will use a niche layout once
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// https://github.com/rust-lang/rust/pull/94075 is merged:
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enum NicheLayoutWithFields1<'a> {
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A(&'a u8, u32),
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B(u32),
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}
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enum NicheLayoutWithFields2 {
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A(NonZero<u32>, u64),
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B(u64),
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}
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enum NicheLayoutWithFields3 {
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A(u8, bool),
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B(u8),
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C(bool),
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D(u8),
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E(u8),
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F,
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}
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#[rustc_layout_scalar_valid_range_start(340282366920938463463374607431768211454)]
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#[rustc_layout_scalar_valid_range_end(1)]
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#[repr(transparent)]
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struct Wrapping128(u128);
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// #[rustc_layout(debug)]
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enum Wrapping128Niche {
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X(Wrapping128),
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Y,
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Z,
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}
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#[repr(i128)]
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enum DirectTag128 {
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A(u32),
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B(u32),
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}
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#[repr(u32)]
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enum ArbitraryDiscr {
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Abc(u32) = 1000,
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Def(u32) = 5000_000,
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}
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fn main() {
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let a = Some(CStyleEnum::Low);
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let b = Option::<CStyleEnum>::None;
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let c = NicheLayoutEnum::Tag1;
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let d = NicheLayoutEnum::Data { my_data: CStyleEnum::High };
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let e = NicheLayoutEnum::Tag2;
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let f = Some(&1u32);
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let g = Option::<&'static u32>::None;
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let h = Some(12u32);
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let i = Option::<u32>::None;
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let j = CStyleEnum::High;
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let k = Some("IAMA optional string!".to_string());
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let l = Result::<u32, Empty>::Ok(42);
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let niche128_some = NonZero::new(123456i128);
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let niche128_none: Option<NonZero<i128>> = None;
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let wrapping_niche128_untagged =
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unsafe { Wrapping128Niche::X(Wrapping128(340282366920938463463374607431768211454)) };
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let wrapping_niche128_none1 = Wrapping128Niche::Y;
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let wrapping_niche128_none2 = Wrapping128Niche::Z;
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let direct_tag_128_a = DirectTag128::A(42);
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let direct_tag_128_b = DirectTag128::B(137);
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let niche_w_fields_1_some = NicheLayoutWithFields1::A(&77, 7);
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let niche_w_fields_1_none = NicheLayoutWithFields1::B(99);
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let niche_w_fields_2_some = NicheLayoutWithFields2::A(NonZero::new(800).unwrap(), 900);
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let niche_w_fields_2_none = NicheLayoutWithFields2::B(1000);
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let niche_w_fields_3_some = NicheLayoutWithFields3::A(137, true);
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let niche_w_fields_3_niche1 = NicheLayoutWithFields3::B(12);
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let niche_w_fields_3_niche2 = NicheLayoutWithFields3::C(false);
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let niche_w_fields_3_niche3 = NicheLayoutWithFields3::D(34);
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let niche_w_fields_3_niche4 = NicheLayoutWithFields3::E(56);
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let niche_w_fields_3_niche5 = NicheLayoutWithFields3::F;
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let niche_w_fields_std_result_ok: Result<Box<[u8]>, u64> = Ok(vec![1, 2, 3].into());
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let niche_w_fields_std_result_err: Result<Box<[u8]>, u64> = Err(789);
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let arbitrary_discr1 = ArbitraryDiscr::Abc(1234);
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let arbitrary_discr2 = ArbitraryDiscr::Def(5678);
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zzz(); // #break
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}
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fn zzz() {
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()
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}
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