Allow foreign exceptions to unwind through Rust code and Rust panics to unwind through FFI by Amanieu · Pull Request #65646 · rust-lang/rust

Amanieu · 2019-10-21T02:04:46Z

This PR fixes interactions between Rust panics and foreign (mainly C++) exceptions.

C++ exceptions (and other FFI exceptions) can now safely unwind through Rust code:

The FFI function causing the unwind must be marked with #[unwind(allowed)]. If this is not the case then LLVM may optimize landing pads away with the assumption that they are unreachable.
Drop code will be executed as the exception unwinds through the stack, as with a Rust panic.
catch_unwind will not catch the exception, instead the exception will silently continue unwinding past it.

Rust panics can now safely unwind through C++ code:

C++ destructors will be called as the stack unwinds.
The Rust panic can only be caught with catch (...), after which it can be either rethrown or discarded.
C++ cannot name the type of the Rust exception object used for unwinding, which means that it can't be caught explicitly or have its contents inspected.

Tests have been added to ensure all of the above works correctly.

Some notes about non-C++ exceptions:

pthread_cancel and pthread_exit use unwinding on glibc. This has the same behavior as a C++ exception: destructors are run but it cannot be caught by catch_unwind.
longjmp on Windows is implemented using unwinding. Destructors are run on MSVC, but not on MinGW. In both cases the unwind cannot be caught by catch_unwind.
As with C++ exceptions, you need to mark the relevant FFI functions with #[unwind(allowed)], otherwise LLVM will optimize out the destructors since they seem unreachable.

I haven't updated any of the documentation, so officially unwinding through FFI is still UB. However this is a step towards making it well-defined.

Fixes#65441

cc @gnzlbg
r? @alexcrichton

Amanieu · 2019-10-21T02:06:36Z

Also note that I haven't tested this with SEH yet, so the test will probably fail on windows. Emscripten seems to be using some hack for unwinding that I don't fully understand, so I except that to fail the test as well.

rust-highfive · 2019-10-21T04:04:53Z

The job x86_64-gnu-llvm-6.0 of your PR failed (pretty log, raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

2019-10-21T02:06:59.2952533Z ##[command]git remote add origin https://github.com/rust-lang/rust
2019-10-21T02:06:59.3153690Z ##[command]git config gc.auto 0
2019-10-21T02:06:59.3239282Z ##[command]git config --get-all http.https://github.com/rust-lang/rust.extraheader
2019-10-21T02:06:59.3295561Z ##[command]git config --get-all http.proxy
2019-10-21T02:06:59.3434999Z ##[command]git -c http.extraheader="AUTHORIZATION: basic ***" fetch --force --tags --prune --progress --no-recurse-submodules --depth=2 origin +refs/heads/*:refs/remotes/origin/* +refs/pull/65646/merge:refs/remotes/pull/65646/merge
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2019-10-21T03:24:44.0034422Z Uplifting stage1 rustc (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
2019-10-21T03:24:44.0034965Z Copying stage2 rustc from stage1 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
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2019-10-21T03:38:01.7207366Z 2019-10-21T03:38:01.7209547Z Doc-tests core
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2019-10-21T03:46:09.5861650Z Testing term stage1 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
2019-10-21T03:46:09.8169652Z Compiling term v0.0.0 (/checkout/src/libterm)
---
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2019-10-21T04:02:55.4276329Z Check compiletest suite=run-make-fulldeps mode=run-make (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
2019-10-21T04:02:55.5917037Z 2019-10-21T04:02:55.5917281Z running 202 tests
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2019-10-21T04:04:24.4294056Z failures:
2019-10-21T04:04:24.4303683Z 2019-10-21T04:04:24.4305349Z ---- [run-make] run-make-fulldeps/foreign-exceptions stdout ----
2019-10-21T04:04:24.4306170Z 2019-10-21T04:04:24.4306170Z 2019-10-21T04:04:24.4306256Z error: make failed
2019-10-21T04:04:24.4306320Z status: exit code: 2
2019-10-21T04:04:24.4306357Z command: "make"
2019-10-21T04:04:24.4306410Z stdout:
2019-10-21T04:04:24.4306700Z ------------------------------------------
2019-10-21T04:04:24.4307033Z c++ -ffunction-sections -fdata-sections -fPIC -m64 -c -o /checkout/obj/build/x86_64-unknown-linux-gnu/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions/libfoo.o foo.cpp
2019-10-21T04:04:24.4307436Z ar crus /checkout/obj/build/x86_64-unknown-linux-gnu/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions/libfoo.a /checkout/obj/build/x86_64-unknown-linux-gnu/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions/libfoo.o
2019-10-21T04:04:24.4315226Z LD_LIBRARY_PATH="/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions:/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib:/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-bootstrap-tools/x86_64-unknown-linux-gnu/release/deps:/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/lib" '/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc' --out-dir /checkout/obj/build/x86_64-unknown-linux-gnu/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions -L /checkout/obj/build/x86_64-unknown-linux-gnu/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions foo.rs -lfoo -lstdc++
2019-10-21T04:04:24.4315783Z Makefile:7: recipe for target 'foo' failed
2019-10-21T04:04:24.4316063Z ------------------------------------------
2019-10-21T04:04:24.4316109Z stderr:
2019-10-21T04:04:24.4316300Z ------------------------------------------
2019-10-21T04:04:24.4316300Z ------------------------------------------
2019-10-21T04:04:24.4316732Z ar: `u' modifier ignored since `D' is the default (see `U')
2019-10-21T04:04:24.4316805Z error[E0658]: the `#[unwind]` attribute is an experimental feature
2019-10-21T04:04:24.4317102Z |
2019-10-21T04:04:24.4317143Z 15 | #[unwind(allowed)]
2019-10-21T04:04:24.4317182Z | ^^^^^^^^^^^^^^^^^^
2019-10-21T04:04:24.4317348Z |
2019-10-21T04:04:24.4317348Z |
2019-10-21T04:04:24.4317769Z = note: for more information, see ***/issues/58760
2019-10-21T04:04:24.4317825Z = help: add `#![feature(unwind_attributes)]` to the crate attributes to enable
2019-10-21T04:04:24.4317858Z 2019-10-21T04:04:24.4317921Z error[E0658]: the `#[unwind]` attribute is an experimental feature
2019-10-21T04:04:24.4318498Z |
2019-10-21T04:04:24.4318555Z 18 | #[unwind(allowed)]
2019-10-21T04:04:24.4318593Z | ^^^^^^^^^^^^^^^^^^
2019-10-21T04:04:24.4318629Z |
2019-10-21T04:04:24.4318629Z |
2019-10-21T04:04:24.4318916Z = note: for more information, see ***/issues/58760
2019-10-21T04:04:24.4318982Z = help: add `#![feature(unwind_attributes)]` to the crate attributes to enable
2019-10-21T04:04:24.4319069Z error: aborting due to 2 previous errors
2019-10-21T04:04:24.4319096Z 2019-10-21T04:04:24.4319322Z For more information about this error, try `rustc --explain E0658`.
2019-10-21T04:04:24.4319322Z For more information about this error, try `rustc --explain E0658`.
2019-10-21T04:04:24.4319367Z make: *** [foo] Error 1
2019-10-21T04:04:24.4319609Z ------------------------------------------
2019-10-21T04:04:24.4319638Z 2019-10-21T04:04:24.4319661Z 2019-10-21T04:04:24.4319683Z ---
2019-10-21T04:04:24.4321210Z thread 'main' panicked at 'Some tests failed', src/tools/compiletest/src/main.rs:537:22
2019-10-21T04:04:24.4321284Z note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace.
2019-10-21T04:04:24.4321335Z 2019-10-21T04:04:24.4321361Z 2019-10-21T04:04:24.4325623Z command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-tools-bin/compiletest" "--compile-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib" "--run-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib/rustlib/x86_64-unknown-linux-gnu/lib" "--rustc-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "--rustdoc-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustdoc" "--src-base" "/checkout/src/test/run-make-fulldeps" "--build-base" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-make-fulldeps" "--stage-id" "stage2-x86_64-unknown-linux-gnu" "--mode" "run-make" "--target" "x86_64-unknown-linux-gnu" "--host" "x86_64-unknown-linux-gnu" "--llvm-filecheck" "/usr/lib/llvm-6.0/bin/FileCheck" "--host-rustcflags" "-Crpath -O -Cdebuginfo=0 -Zunstable-options -Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--target-rustcflags" "-Crpath -O -Cdebuginfo=0 -Zunstable-options -Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--docck-python" "/usr/bin/python2.7" "--lldb-python" "/usr/bin/python2.7" "--gdb" "/usr/bin/gdb" "--quiet" "--llvm-version" "6.0.0\n" "--system-llvm" "--cc" "cc" "--cxx" "c++" "--cflags" "-ffunction-sections -fdata-sections -fPIC -m64" "--llvm-components" "aarch64 aarch64asmparser aarch64asmprinter aarch64codegen aarch64desc aarch64disassembler aarch64info aarch64utils all all-targets amdgpu amdgpuasmparser amdgpuasmprinter amdgpucodegen amdgpudesc amdgpudisassembler amdgpuinfo amdgpuutils analysis arm armasmparser armasmprinter armcodegen armdesc armdisassembler arminfo armutils asmparser asmprinter binaryformat bitreader bitwriter bpf bpfasmparser bpfasmprinter bpfcodegen bpfdesc bpfdisassembler bpfinfo codegen core coroutines coverage debuginfocodeview debuginfodwarf debuginfomsf debuginfopdb demangle dlltooldriver engine executionengine fuzzmutate globalisel hexagon hexagonasmparser hexagoncodegen hexagondesc hexagondisassembler hexagoninfo instcombine instrumentation interpreter ipo irreader lanai lanaiasmparser lanaiasmprinter lanaicodegen lanaidesc lanaidisassembler lanaiinfo libdriver lineeditor linker lto mc mcdisassembler mcjit mcparser mips mipsasmparser mipsasmprinter mipscodegen mipsdesc mipsdisassembler mipsinfo mirparser msp430 msp430asmprinter msp430codegen msp430desc msp430info native nativecodegen nvptx nvptxasmprinter nvptxcodegen nvptxdesc nvptxinfo objcarcopts object objectyaml option orcjit passes powerpc powerpcasmparser powerpcasmprinter powerpccodegen powerpcdesc powerpcdisassembler powerpcinfo profiledata runtimedyld scalaropts selectiondag sparc sparcasmparser sparcasmprinter sparccodegen sparcdesc sparcdisassembler sparcinfo support symbolize systemz systemzasmparser systemzasmprinter systemzcodegen systemzdesc systemzdisassembler systemzinfo tablegen target transformutils vectorize windowsmanifest x86 x86asmparser x86asmprinter x86codegen x86desc x86disassembler x86info x86utils xcore xcoreasmprinter xcorecodegen xcoredesc xcoredisassembler xcoreinfo" "--llvm-cxxflags" "-I/usr/lib/llvm-6.0/include -std=c++0x -fuse-ld=gold -Wl,--no-keep-files-mapped -Wl,--no-map-whole-files -fPIC -fvisibility-inlines-hidden -Werror=date-time -std=c++11 -Wall -W -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wno-maybe-uninitialized -Wdelete-non-virtual-dtor -Wno-comment -ffunction-sections -fdata-sections -O2 -DNDEBUG -fno-exceptions -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS" "--ar" "ar" "--llvm-bin-dir" "/usr/lib/llvm-6.0/bin" "--adb-path" "adb" "--adb-test-dir" "/data/tmp/work" "--android-cross-path" "" "--color" "always"
2019-10-21T04:04:24.4326467Z 2019-10-21T04:04:24.4326495Z 2019-10-21T04:04:24.4362199Z failed to run: /checkout/obj/build/bootstrap/debug/bootstrap test
2019-10-21T04:04:24.4362281Z Build completed unsuccessfully in 1:50:41
2019-10-21T04:04:24.4362281Z Build completed unsuccessfully in 1:50:41
2019-10-21T04:04:24.4392560Z == clock drift check ==
2019-10-21T04:04:24.4416648Z local time: Mon Oct 21 04:04:24 UTC 2019
2019-10-21T04:04:24.7074150Z network time: Mon, 21 Oct 2019 04:04:24 GMT
2019-10-21T04:04:24.7076416Z == end clock drift check ==
2019-10-21T04:04:31.7533944Z 2019-10-21T04:04:31.7702996Z ##[error]Bash exited with code '1'.
2019-10-21T04:04:31.7762650Z ##[section]Starting: Checkout
2019-10-21T04:04:31.7765861Z ==============================================================================
2019-10-21T04:04:31.7765914Z Task : Get sources
2019-10-21T04:04:31.7765984Z Description : Get sources from a repository. Supports Git, TfsVC, and SVN repositories.

I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact @TimNN. (Feature Requests)

gnzlbg · 2019-10-21T12:21:32Z

This now means that foreign exceptions are not caught by the catch_unwind at the thread boundary right ? I'm not sure if letting all exceptions unwind up to the thread boundary is the right thing to do, we might want to actually catch foreign exceptions there and abort the process explaining what happened, but I'm not sure how to handle the foreign exceptions used by pthread_cancel in that case (those should not be caught).

Amanieu · 2019-10-21T12:43:01Z

Allowing an exception to unwind to the thread boundary will cause an abort anyways at the point of the throw since it won't be able to find a catch handler.

gnzlbg · 2019-10-21T12:47:44Z

Allowing an exception to unwind to the thread boundary will cause an abort anyways at the point of the throw since it won't be able to find a catch handler.

I think we should have a test for the error message here. Also, this is not always the case, e.g., when the exception thrown performs forced unwinding, e.g., the exception thrown by cancellation points when pthread_cancel, abort won't be called (which is good).

Amanieu · 2019-10-21T13:07:49Z

I think we should have a test for the error message here. Also, this is not always the case, e.g., when the exception thrown performs forced unwinding, e.g., the exception thrown by cancellation points when pthread_cancel, abort won't be called (which is good).

Forced unwinds work differently from normal unwinds: there is a callback that is called on every frame which allows the caller of _Unwind_ForcedUnwind to choose when to stop unwinding the stack. This is what pthread_cancel uses to unwind to the root of the thread.

rust-highfive · 2019-10-21T15:03:06Z

The job x86_64-gnu-llvm-6.0 of your PR failed (pretty log, raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

2019-10-21T13:04:43.2845546Z ##[command]git remote add origin https://github.com/rust-lang/rust
2019-10-21T13:04:43.3051688Z ##[command]git config gc.auto 0
2019-10-21T13:04:43.3123209Z ##[command]git config --get-all http.https://github.com/rust-lang/rust.extraheader
2019-10-21T13:04:43.3183328Z ##[command]git config --get-all http.proxy
2019-10-21T13:04:43.3334657Z ##[command]git -c http.extraheader="AUTHORIZATION: basic ***" fetch --force --tags --prune --progress --no-recurse-submodules --depth=2 origin +refs/heads/*:refs/remotes/origin/* +refs/pull/65646/merge:refs/remotes/pull/65646/merge
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2019-10-21T14:14:55.0098072Z .................................................................................................... 5400/9203
2019-10-21T14:15:05.8561671Z ...........................................................................................i........ 5500/9203
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2019-10-21T14:15:19.6150485Z .................................................................................................... 5700/9203
2019-10-21T14:15:30.9331821Z ........................................................................................ii...i..ii.. 5800/9203
2019-10-21T14:15:58.5690768Z .................................................................................................... 6000/9203
2019-10-21T14:16:08.2913187Z .................................................................................................... 6100/9203
2019-10-21T14:16:17.7607892Z .................................................................................................... 6200/9203
2019-10-21T14:16:17.7607892Z .................................................................................................... 6200/9203
2019-10-21T14:16:33.5166184Z ..........i..ii..................................................................................... 6300/9203
2019-10-21T14:16:54.3487547Z ......................................................................i............................. 6500/9203
2019-10-21T14:16:56.5677565Z .................................................................................................... 6600/9203
2019-10-21T14:16:59.1348023Z .............................................i...................................................... 6700/9203
2019-10-21T14:17:02.8614344Z .................................................................................................... 6800/9203
---
2019-10-21T14:21:47.6347838Z finished in 5.965
2019-10-21T14:21:47.6531219Z Check compiletest suite=codegen mode=codegen (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
2019-10-21T14:21:47.8432768Z 2019-10-21T14:21:47.8432947Z running 153 tests
2019-10-21T14:21:51.1484179Z i....iii......iii..iiii...i.............................i..i..................i....i...........ii.i. 100/153
2019-10-21T14:21:53.1731604Z i..iiii..............i.........iii.i.........ii......
2019-10-21T14:21:53.1733762Z 2019-10-21T14:21:53.1737886Z finished in 5.520
2019-10-21T14:21:53.1933125Z Check compiletest suite=codegen-units mode=codegen-units (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
2019-10-21T14:21:53.3707327Z ---
2019-10-21T14:21:55.5965121Z finished in 2.403
2019-10-21T14:21:55.6201947Z Check compiletest suite=assembly mode=assembly (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
2019-10-21T14:21:55.7894961Z 2019-10-21T14:21:55.7895260Z running 9 tests
2019-10-21T14:21:55.7896095Z iiiiiiiii
2019-10-21T14:21:55.7896485Z 2019-10-21T14:21:55.7896533Z finished in 0.171
2019-10-21T14:21:55.8095295Z Check compiletest suite=incremental mode=incremental (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
2019-10-21T14:21:55.9964749Z ---
2019-10-21T14:22:14.7611584Z finished in 18.951
2019-10-21T14:22:14.7839097Z Check compiletest suite=debuginfo mode=debuginfo-gdb+lldb (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
2019-10-21T14:22:14.9724088Z 2019-10-21T14:22:14.9725385Z running 123 tests
2019-10-21T14:22:40.6979926Z .iiiii...i.....i..i...i..i.i.i..i.ii..i.i.....i..i....ii..........iiii..........i...ii...i.......ii. 100/123
2019-10-21T14:22:45.8155342Z i.i.i......iii.i.....ii
2019-10-21T14:22:45.8157364Z 2019-10-21T14:22:45.8164108Z finished in 31.032
2019-10-21T14:22:45.8178312Z Uplifting stage1 rustc (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
2019-10-21T14:22:45.8180058Z Copying stage2 rustc from stage1 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
---
2019-10-21T14:36:00.2931432Z 2019-10-21T14:36:00.2932591Z Doc-tests core
2019-10-21T14:36:05.5241924Z 2019-10-21T14:36:05.5242356Z running 2406 tests
2019-10-21T14:36:17.1927697Z ......iiiii......................................................................................... 100/2406
2019-10-21T14:36:28.7215256Z ................................................................................ii.................. 200/2406
2019-10-21T14:36:55.8840663Z ..i................................................................................................. 400/2406
2019-10-21T14:36:55.8840663Z ..i................................................................................................. 400/2406
2019-10-21T14:37:07.0907479Z .................................................i..i.................iiii.......................... 500/2406
2019-10-21T14:37:28.9072811Z .................................................................................................... 700/2406
2019-10-21T14:37:39.9555280Z .................................................................................................... 800/2406
2019-10-21T14:37:50.9600278Z .................................................................................................... 900/2406
2019-10-21T14:38:02.0497955Z .................................................................................................... 1000/2406
---
2019-10-21T14:42:29.3512881Z 2019-10-21T14:42:29.3514150Z running 994 tests
2019-10-21T14:42:52.1871656Z i................................................................................................... 100/994
2019-10-21T14:43:04.5441025Z .................................................................................................... 200/994
2019-10-21T14:43:13.4393330Z ...................iii......i......i...i......i..................................................... 300/994
2019-10-21T14:43:19.4721454Z .................................................................................................... 400/994
2019-10-21T14:43:27.7626430Z .....................................i..i.................................ii........................ 500/994
2019-10-21T14:43:43.5039153Z .................................................................................................... 700/994
2019-10-21T14:43:43.5039153Z .................................................................................................... 700/994
2019-10-21T14:43:52.2107916Z ....................iiii............................................................................ 800/994
2019-10-21T14:44:08.0779302Z .................................................................................................... 900/994
2019-10-21T14:44:16.2328295Z ..........................................iiii................................................
2019-10-21T14:44:16.2331004Z 2019-10-21T14:44:16.2373443Z finished in 205.832
2019-10-21T14:44:16.2392937Z Testing term stage1 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
2019-10-21T14:44:16.4608521Z Compiling term v0.0.0 (/checkout/src/libterm)
---
2019-10-21T15:01:03.5248268Z finished in 43.607
2019-10-21T15:01:03.5592141Z Check compiletest suite=run-make-fulldeps mode=run-make (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
2019-10-21T15:01:03.7498504Z 2019-10-21T15:01:03.7499986Z running 202 tests
2019-10-21T15:01:40.6585891Z ....................i...ii............................F.....................................i....... 100/202
2019-10-21T15:02:32.7275122Z ................................iiii.......i...........iiii.iii....................................i 200/202
2019-10-21T15:02:33.0721327Z failures:
2019-10-21T15:02:33.0759539Z 2019-10-21T15:02:33.0763443Z ---- [run-make] run-make-fulldeps/foreign-exceptions stdout ----
2019-10-21T15:02:33.0763548Z 2019-10-21T15:02:33.0763548Z 2019-10-21T15:02:33.0763637Z error: make failed
2019-10-21T15:02:33.0768977Z status: exit code: 2
2019-10-21T15:02:33.0769055Z command: "make"
2019-10-21T15:02:33.0769190Z stdout:
2019-10-21T15:02:33.0770523Z ------------------------------------------
2019-10-21T15:02:33.0771004Z c++ -ffunction-sections -fdata-sections -fPIC -m64 -c -o /checkout/obj/build/x86_64-unknown-linux-gnu/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions/libfoo.o foo.cpp
2019-10-21T15:02:33.0776255Z Makefile:10: recipe for target '/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions/libfoo.o' failed
2019-10-21T15:02:33.0776641Z ------------------------------------------
2019-10-21T15:02:33.0776695Z stderr:
2019-10-21T15:02:33.0776911Z ------------------------------------------
2019-10-21T15:02:33.0776911Z ------------------------------------------
2019-10-21T15:02:33.0777586Z foo.cpp:6:16: warning: non-static data member initializers only available with -std=c++11 or -std=gnu++11
2019-10-21T15:02:33.0777690Z bool* ok = nullptr;
2019-10-21T15:02:33.0777737Z ^
2019-10-21T15:02:33.0778141Z foo.cpp:6:16: error: 'nullptr' was not declared in this scope
2019-10-21T15:02:33.0778483Z make: *** [/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions/libfoo.o] Error 1
2019-10-21T15:02:33.0778751Z ------------------------------------------
2019-10-21T15:02:33.0778786Z 2019-10-21T15:02:33.0778831Z 2019-10-21T15:02:33.0778995Z ---
2019-10-21T15:02:33.0782209Z thread 'main' panicked at 'Some tests failed', src/tools/compiletest/src/main.rs:537:22
2019-10-21T15:02:33.0782323Z note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace.
2019-10-21T15:02:33.0803527Z 2019-10-21T15:02:33.0803620Z 2019-10-21T15:02:33.0809318Z command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-tools-bin/compiletest" "--compile-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib" "--run-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib/rustlib/x86_64-unknown-linux-gnu/lib" "--rustc-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "--rustdoc-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustdoc" "--src-base" "/checkout/src/test/run-make-fulldeps" "--build-base" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-make-fulldeps" "--stage-id" "stage2-x86_64-unknown-linux-gnu" "--mode" "run-make" "--target" "x86_64-unknown-linux-gnu" "--host" "x86_64-unknown-linux-gnu" "--llvm-filecheck" "/usr/lib/llvm-6.0/bin/FileCheck" "--host-rustcflags" "-Crpath -O -Cdebuginfo=0 -Zunstable-options -Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--target-rustcflags" "-Crpath -O -Cdebuginfo=0 -Zunstable-options -Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--docck-python" "/usr/bin/python2.7" "--lldb-python" "/usr/bin/python2.7" "--gdb" "/usr/bin/gdb" "--quiet" "--llvm-version" "6.0.0\n" "--system-llvm" "--cc" "cc" "--cxx" "c++" "--cflags" "-ffunction-sections -fdata-sections -fPIC -m64" "--llvm-components" "aarch64 aarch64asmparser aarch64asmprinter aarch64codegen aarch64desc aarch64disassembler aarch64info aarch64utils all all-targets amdgpu amdgpuasmparser amdgpuasmprinter amdgpucodegen amdgpudesc amdgpudisassembler amdgpuinfo amdgpuutils analysis arm armasmparser armasmprinter armcodegen armdesc armdisassembler arminfo armutils asmparser asmprinter binaryformat bitreader bitwriter bpf bpfasmparser bpfasmprinter bpfcodegen bpfdesc bpfdisassembler bpfinfo codegen core coroutines coverage debuginfocodeview debuginfodwarf debuginfomsf debuginfopdb demangle dlltooldriver engine executionengine fuzzmutate globalisel hexagon hexagonasmparser hexagoncodegen hexagondesc hexagondisassembler hexagoninfo instcombine instrumentation interpreter ipo irreader lanai lanaiasmparser lanaiasmprinter lanaicodegen lanaidesc lanaidisassembler lanaiinfo libdriver lineeditor linker lto mc mcdisassembler mcjit mcparser mips mipsasmparser mipsasmprinter mipscodegen mipsdesc mipsdisassembler mipsinfo mirparser msp430 msp430asmprinter msp430codegen msp430desc msp430info native nativecodegen nvptx nvptxasmprinter nvptxcodegen nvptxdesc nvptxinfo objcarcopts object objectyaml option orcjit passes powerpc powerpcasmparser powerpcasmprinter powerpccodegen powerpcdesc powerpcdisassembler powerpcinfo profiledata runtimedyld scalaropts selectiondag sparc sparcasmparser sparcasmprinter sparccodegen sparcdesc sparcdisassembler sparcinfo support symbolize systemz systemzasmparser systemzasmprinter systemzcodegen systemzdesc systemzdisassembler systemzinfo tablegen target transformutils vectorize windowsmanifest x86 x86asmparser x86asmprinter x86codegen x86desc x86disassembler x86info x86utils xcore xcoreasmprinter xcorecodegen xcoredesc xcoredisassembler xcoreinfo" "--llvm-cxxflags" "-I/usr/lib/llvm-6.0/include -std=c++0x -fuse-ld=gold -Wl,--no-keep-files-mapped -Wl,--no-map-whole-files -fPIC -fvisibility-inlines-hidden -Werror=date-time -std=c++11 -Wall -W -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wno-maybe-uninitialized -Wdelete-non-virtual-dtor -Wno-comment -ffunction-sections -fdata-sections -O2 -DNDEBUG -fno-exceptions -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS" "--ar" "ar" "--llvm-bin-dir" "/usr/lib/llvm-6.0/bin" "--adb-path" "adb" "--adb-test-dir" "/data/tmp/work" "--android-cross-path" "" "--color" "always"
2019-10-21T15:02:33.0810361Z 2019-10-21T15:02:33.0810396Z 2019-10-21T15:02:33.0810456Z failed to run: /checkout/obj/build/bootstrap/debug/bootstrap test
2019-10-21T15:02:33.0810530Z Build completed unsuccessfully in 1:50:57
2019-10-21T15:02:33.0810530Z Build completed unsuccessfully in 1:50:57
2019-10-21T15:02:33.0840875Z == clock drift check ==
2019-10-21T15:02:33.0859667Z local time: Mon Oct 21 15:02:33 UTC 2019
2019-10-21T15:02:33.1436769Z network time: Mon, 21 Oct 2019 15:02:33 GMT
2019-10-21T15:02:33.1439611Z == end clock drift check ==
2019-10-21T15:02:38.7241044Z 2019-10-21T15:02:38.7353265Z ##[error]Bash exited with code '1'.
2019-10-21T15:02:38.7413518Z ##[section]Starting: Checkout
2019-10-21T15:02:38.7415407Z ==============================================================================
2019-10-21T15:02:38.7415488Z Task : Get sources
2019-10-21T15:02:38.7415542Z Description : Get sources from a repository. Supports Git, TfsVC, and SVN repositories.

I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact @TimNN. (Feature Requests)

Centril · 2019-10-21T15:09:37Z

(It's unclear to me which team(s) owns what here, so I've nominated for all the relevant ones. Also, this interacts with the unwinding WG probably. cc @nikomatsakis @BatmanAoD)

gnzlbg · 2019-10-21T15:13:04Z

Since the only code that can observe this change is code that has UB I think this is strictly a T-compiler issue.

gnzlbg · 2019-10-21T15:15:07Z

Forced unwinds work differently from normal unwinds: there is a callback that is called on every frame which allows the caller of _Unwind_ForcedUnwind to choose when to stop unwinding the stack. This is what pthread_cancel uses to unwind to the root of the thread.

@Amanieu in my tests, the current implementation of catch_unwind (not the one in this PR) catches all forced unwinds though (EDIT: which results in garbage). The one used by pthreads has a callback at the thread boundary that catches it inside the pthread implementation, but I was wondering what to do with other forced unwinds that do reach the thread boundary (is there anything we can do about those or a way to tell them apart from the pthread one?)

nikomatsakis · 2019-10-21T20:30:16Z

I definitely think this falls squarely under the nascent "wg-ffi-unwind".

BatmanAoD · 2019-10-21T20:59:44Z

I don't have a Windows machine available for testing; can anyone confirm whether this approach works for SEH? (Also, does anyone know what the current behavior of catch_unwind is on Windows when longjmp crosses it?)

Amanieu · 2019-10-21T23:53:14Z

longjmp on Windows is implemented using SEH unwinding, so it should behave the same way as a C++ exception.

I'm going to let bors run the tests on the Windows targets since they are all tier 1.

@bors try

bors · 2019-10-21T23:53:24Z

⌛ Trying commit 40ef77edc067975666ec3bcd62e80d7684512543 with merge 0eb353bac089a59e81b031c52c99a3fcef84cd8d...

BatmanAoD · 2019-10-21T23:58:53Z

@Amanieu In fact, @alexcrichton fixed some logic along those lines some time back. I was concerned about your statement above that you expect this patch to fail on Windows, but I look forward to bors showing us that your pessimism was unsubstantiated 😄

bors · 2019-10-22T03:06:07Z

☀️ Try build successful - checks-azure
Build commit: 0eb353bac089a59e81b031c52c99a3fcef84cd8d (0eb353bac089a59e81b031c52c99a3fcef84cd8d)

retep998 · 2019-10-22T08:37:01Z

I know previously when we didn't abort on unwinding across the FFI barrier, C++ exceptions would call Rust drop code just fine and vice versa on pc-windows-msvc.

Amanieu · 2019-10-22T09:21:13Z

@bors try

bors · 2019-10-22T09:21:23Z

⌛ Trying commit b8ccab341d0d6ed9fc3efa72aa0eb3bf1bc88793 with merge 1879eb5440b3f015d11e77e9c3b4f80a7c390384...

bors · 2019-11-02T14:42:48Z

💔 Test failed - checks-azure

Amanieu · 2019-11-02T16:23:18Z

@bors r=nikomatsakis

bors · 2019-11-02T16:23:19Z

📌 Commit 52a3ae5ea6a99ff25f6e37087ae2b91d3f365f89 has been approved by nikomatsakis

bors · 2019-11-02T21:50:30Z

⌛ Testing commit 52a3ae5ea6a99ff25f6e37087ae2b91d3f365f89 with merge 09033866b52e4f7927b0e35903c2e2c1bfddf4a7...

rust-highfive · 2019-11-02T22:26:34Z

The job dist-arm-linux of your PR failed (pretty log, raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

2019-11-02T22:24:12.4802039Z Compiling panic_unwind v0.0.0 (/checkout/src/libpanic_unwind)
2019-11-02T22:24:12.6006480Z error: unnecessary `unsafe` block
2019-11-02T22:24:12.6007705Z --> src/libpanic_unwind/gcc.rs:180:35
2019-11-02T22:24:12.6008318Z |
2019-11-02T22:24:12.6009008Z 144 | / unsafe extern "C" fn rust_eh_personality(state: uw::_Unwind_State,
2019-11-02T22:24:12.6015835Z 145 | | exception_object: *mut uw::_Unwind_Exception,
2019-11-02T22:24:12.6016592Z 146 | | context: *mut uw::_Unwind_Context)
2019-11-02T22:24:12.6017439Z 147 | | -> uw::_Unwind_Reason_Code {
2019-11-02T22:24:12.6017967Z ... |
2019-11-02T22:24:12.6018775Z 180 | | let exception_class = unsafe { (*exception_object).exception_class };
2019-11-02T22:24:12.6019816Z ... |
2019-11-02T22:24:12.6020209Z 224 | | }
2019-11-02T22:24:12.6021005Z 225 | | }
2019-11-02T22:24:12.6021005Z 225 | | }
2019-11-02T22:24:12.6021743Z | |_________- because it's nested under this `unsafe` fn
2019-11-02T22:24:12.6022341Z = note: `-D unused-unsafe` implied by `-D warnings`
2019-11-02T22:24:12.6022408Z 2019-11-02T22:24:12.6034577Z error: aborting due to previous error
2019-11-02T22:24:12.6034702Z ---
2019-11-02T22:24:13.1550049Z local time: Sat Nov 2 22:24:13 UTC 2019
2019-11-02T22:24:13.4211464Z network time: Sat, 02 Nov 2019 22:24:13 GMT
2019-11-02T22:24:13.4212508Z == end clock drift check ==
2019-11-02T22:24:19.2206207Z 2019-11-02T22:24:19.2325732Z ##[error]Bash exited with code '1'.
2019-11-02T22:24:19.2399218Z ##[section]Starting: Checkout
2019-11-02T22:24:19.2401974Z ==============================================================================
2019-11-02T22:24:19.2402077Z Task : Get sources
2019-11-02T22:24:19.2402150Z Description : Get sources from a repository. Supports Git, TfsVC, and SVN repositories.

I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact @TimNN. (Feature Requests)

bors · 2019-11-02T22:26:48Z

💔 Test failed - checks-azure

Amanieu · 2019-11-02T22:36:35Z

@bors r=nikomatsakis

bors · 2019-11-02T22:36:36Z

📌 Commit 003e996 has been approved by nikomatsakis

bors · 2019-11-03T01:41:13Z

⌛ Testing commit 003e996 with merge 86adee9...

rust-highfive · 2019-11-03T03:24:28Z

The job i686-apple of your PR failed (pretty log, raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

2019-11-03T03:22:52.5618220Z status: exit code: 2
2019-11-03T03:22:52.5618320Z command: "make"
2019-11-03T03:22:52.5618390Z stdout:
2019-11-03T03:22:52.5619060Z ------------------------------------------
2019-11-03T03:22:52.5620090Z /Users/runner/runners/2.160.0/work/1/s/clang+llvm-7.0.0-x86_64-apple-darwin/bin/clang++ -ffunction-sections -fdata-sections -fPIC --target=i686-apple-darwin -stdlib=libc++ -c -o /Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions/libfoo.o foo.cpp
2019-11-03T03:22:52.5621240Z ar crus /Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions/libfoo.a /Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions/libfoo.o
2019-11-03T03:22:52.5622770Z DYLD_LIBRARY_PATH="/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions:/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/stage2/lib:" '/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/stage2/bin/rustc' --out-dir /Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions -L /Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions foo.rs -lfoo 2019-11-03T03:22:52.5623740Z ------------------------------------------
2019-11-03T03:22:52.5623870Z stderr:
2019-11-03T03:22:52.5624530Z ------------------------------------------
2019-11-03T03:22:52.5624530Z ------------------------------------------
2019-11-03T03:22:52.5624650Z error: linking with `cc` failed: exit code: 1
2019-11-03T03:22:52.5624750Z |
2019-11-03T03:22:52.5638590Z = note: "cc" "-m32" "-L" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/stage2/lib/rustlib/i686-apple-darwin/lib" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions/foo.foo.7rcbfp3g-cgu.0.rcgu.o" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions/foo.foo.7rcbfp3g-cgu.1.rcgu.o" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions/foo.foo.7rcbfp3g-cgu.10.rcgu.o" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions/foo.foo.7rcbfp3g-cgu.11.rcgu.o" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions/foo.foo.7rcbfp3g-cgu.12.rcgu.o" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions/foo.foo.7rcbfp3g-cgu.13.rcgu.o" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions/foo.foo.7rcbfp3g-cgu.14.rcgu.o" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions/foo.foo.7rcbfp3g-cgu.15.rcgu.o" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions/foo.foo.7rcbfp3g-cgu.2.rcgu.o" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions/foo.foo.7rcbfp3g-cgu.3.rcgu.o" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions/foo.foo.7rcbfp3g-cgu.4.rcgu.o" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions/foo.foo.7rcbfp3g-cgu.5.rcgu.o" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions/foo.foo.7rcbfp3g-cgu.6.rcgu.o" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions/foo.foo.7rcbfp3g-cgu.7.rcgu.o" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions/foo.foo.7rcbfp3g-cgu.8.rcgu.o" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions/foo.foo.7rcbfp3g-cgu.9.rcgu.o" "-o" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions/foo" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions/foo.belfx9afw9cmv8.rcgu.o" "-Wl,-dead_strip" "-nodefaultlibs" "-L" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/test/run-make-fulldeps/foreign-exceptions/foreign-exceptions" "-L" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/stage2/lib/rustlib/i686-apple-darwin/lib" "-lfoo" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/stage2/lib/rustlib/i686-apple-darwin/lib/libstd-b27f3461b48a7877.rlib" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/stage2/lib/rustlib/i686-apple-darwin/lib/libpanic_unwind-7e907693e86a707c.rlib" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/stage2/lib/rustlib/i686-apple-darwin/lib/libhashbrown-bf7b8793668f2842.rlib" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/stage2/lib/rustlib/i686-apple-darwin/lib/librustc_std_workspace_alloc-ae4dc4b119018ccb.rlib" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/stage2/lib/rustlib/i686-apple-darwin/lib/libbacktrace-93aecc0b3e3090ac.rlib" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/stage2/lib/rustlib/i686-apple-darwin/lib/libbacktrace_sys-68d9808dc96de59a.rlib" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/stage2/lib/rustlib/i686-apple-darwin/lib/librustc_demangle-78182cd429d4d797.rlib" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/stage2/lib/rustlib/i686-apple-darwin/lib/libunwind-0124aa79f4ab648e.rlib" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/stage2/lib/rustlib/i686-apple-darwin/lib/libcfg_if-99b009f93b503420.rlib" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/stage2/lib/rustlib/i686-apple-darwin/lib/liblibc-55e2934ec5c7cec2.rlib" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/stage2/lib/rustlib/i686-apple-darwin/lib/liballoc-a0ec04d43f8f41f3.rlib" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/stage2/lib/rustlib/i686-apple-darwin/lib/librustc_std_workspace_core-15e92aa1db6aeca3.rlib" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/stage2/lib/rustlib/i686-apple-darwin/lib/libcore-b9ca771f60ecf5e5.rlib" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/stage2/lib/rustlib/i686-apple-darwin/lib/libcompiler_builtins-38538b3493e3d38b.rlib" "-lSystem" "-lresolv" "-lc" "-lm"
2019-11-03T03:22:52.5641840Z = note: Undefined symbols for architecture i386:
2019-11-03T03:22:52.5641960Z "std::terminate()", referenced from:
2019-11-03T03:22:52.5642070Z ___clang_call_terminate in libfoo.a(libfoo.o)
2019-11-03T03:22:52.5642190Z "___cxa_allocate_exception", referenced from:
2019-11-03T03:22:52.5642290Z callback() in libfoo.a(libfoo.o)
2019-11-03T03:22:52.5642420Z "___gxx_personality_v0", referenced from:
2019-11-03T03:22:52.5642530Z _throw_cxx_exception in libfoo.a(libfoo.o)
2019-11-03T03:22:52.5642640Z _cxx_catch_callback in libfoo.a(libfoo.o)
2019-11-03T03:22:52.5642750Z drop_check::~drop_check() in libfoo.a(libfoo.o)
2019-11-03T03:22:52.5642860Z Dwarf Exception Unwind Info (__eh_frame) in libfoo.a(libfoo.o)
2019-11-03T03:22:52.5642980Z "___cxa_rethrow", referenced from:
2019-11-03T03:22:52.5643090Z _cxx_catch_callback in libfoo.a(libfoo.o)
2019-11-03T03:22:52.5643200Z "___cxa_throw", referenced from:
2019-11-03T03:22:52.5643310Z callback() in libfoo.a(libfoo.o)
2019-11-03T03:22:52.5643410Z "___cxa_begin_catch", referenced from:
2019-11-03T03:22:52.5643520Z _throw_cxx_exception in libfoo.a(libfoo.o)
2019-11-03T03:22:52.5643620Z ___clang_call_terminate in libfoo.a(libfoo.o)
2019-11-03T03:22:52.5643750Z _cxx_catch_callback in libfoo.a(libfoo.o)
2019-11-03T03:22:52.5643860Z "vtable for __cxxabiv1::__class_type_info", referenced from:
2019-11-03T03:22:52.5643980Z typeinfo for exception in libfoo.a(libfoo.o)
2019-11-03T03:22:52.5644100Z typeinfo for rust_panic in libfoo.a(libfoo.o)
2019-11-03T03:22:52.5644960Z NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
2019-11-03T03:22:52.5645150Z "___cxa_end_catch", referenced from:
2019-11-03T03:22:52.5645250Z _throw_cxx_exception in libfoo.a(libfoo.o)
2019-11-03T03:22:52.5645370Z _cxx_catch_callback in libfoo.a(libfoo.o)
2019-11-03T03:22:52.5645490Z ld: symbol(s) not found for architecture i386
2019-11-03T03:22:52.5646350Z clang: error: linker command failed with exit code 1 (use -v to see invocation)
2019-11-03T03:22:52.5646570Z 2019-11-03T03:22:52.5646660Z error: aborting due to previous error
2019-11-03T03:22:52.5646720Z 2019-11-03T03:22:52.5646720Z 2019-11-03T03:22:52.5646790Z make: *** [foo] Error 1
2019-11-03T03:22:52.5647520Z ------------------------------------------
2019-11-03T03:22:52.5647620Z 2019-11-03T03:22:52.5647660Z 2019-11-03T03:22:52.5647710Z ---
2019-11-03T03:22:52.5650170Z thread 'main' panicked at 'Some tests failed', src/tools/compiletest/src/main.rs:537:22
2019-11-03T03:22:52.5650340Z note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace.
2019-11-03T03:22:52.5650420Z 2019-11-03T03:22:52.5650460Z 2019-11-03T03:22:52.5657340Z command did not execute successfully: "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/stage0-tools-bin/compiletest" "--compile-lib-path" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/stage2/lib" "--run-lib-path" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/stage2/lib/rustlib/i686-apple-darwin/lib" "--rustc-path" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/stage2/bin/rustc" "--rustdoc-path" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/stage2/bin/rustdoc" "--src-base" "/Users/runner/runners/2.160.0/work/1/s/src/test/run-make-fulldeps" "--build-base" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/test/run-make-fulldeps" "--stage-id" "stage2-i686-apple-darwin" "--mode" "run-make" "--target" "i686-apple-darwin" "--host" "i686-apple-darwin" "--llvm-filecheck" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/llvm/build/bin/FileCheck" "--nodejs" "/usr/local/bin/node" "--host-rustcflags" "-Crpath -O -Cdebuginfo=0 -Zunstable-options -Lnative=/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/native/rust-test-helpers" "--target-rustcflags" "-Crpath -O -Cdebuginfo=0 -Zunstable-options -Lnative=/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/native/rust-test-helpers" "--docck-python" "/usr/local/bin/python2.7" "--lldb-python" "/usr/bin/python" "--lldb-version" "lldb-902.0.79.2\n Swift-4.1\n" "--lldb-python-dir" "/Applications/Xcode_9.3.app/Contents/SharedFrameworks/LLDB.framework/Resources/Python" "--llvm-version" "9.0.0-rust-1.40.0-dev\n" "--cc" "/Users/runner/runners/2.160.0/work/1/s/clang+llvm-7.0.0-x86_64-apple-darwin/bin/clang" "--cxx" "/Users/runner/runners/2.160.0/work/1/s/clang+llvm-7.0.0-x86_64-apple-darwin/bin/clang++" "--cflags" "-ffunction-sections -fdata-sections -fPIC --target=i686-apple-darwin -stdlib=libc++" "--llvm-components" "aarch64 aarch64asmparser aarch64codegen aarch64desc aarch64disassembler aarch64info aarch64utils aggressiveinstcombine all all-targets analysis arm armasmparser armcodegen armdesc armdisassembler arminfo armutils asmparser asmprinter binaryformat bitreader bitstreamreader bitwriter codegen core coroutines coverage debuginfocodeview debuginfodwarf debuginfogsym debuginfomsf debuginfopdb demangle dlltooldriver engine executionengine fuzzmutate globalisel gtest gtest_main hexagon hexagonasmparser hexagoncodegen hexagondesc hexagondisassembler hexagoninfo instcombine instrumentation interpreter ipo irreader jitlink libdriver lineeditor linker lto mc mca mcdisassembler mcjit mcparser mips mipsasmparser mipscodegen mipsdesc mipsdisassembler mipsinfo mirparser msp430 msp430asmparser msp430codegen msp430desc msp430disassembler msp430info native nativecodegen nvptx nvptxcodegen nvptxdesc nvptxinfo objcarcopts object objectyaml option orcjit passes powerpc powerpcasmparser powerpccodegen powerpcdesc powerpcdisassembler powerpcinfo profiledata remarks riscv riscvasmparser riscvcodegen riscvdesc riscvdisassembler riscvinfo riscvutils runtimedyld scalaropts selectiondag sparc sparcasmparser sparccodegen sparcdesc sparcdisassembler sparcinfo support symbolize systemz systemzasmparser systemzcodegen systemzdesc systemzdisassembler systemzinfo tablegen target testingsupport textapi transformutils vectorize webassembly webassemblyasmparser webassemblycodegen webassemblydesc webassemblydisassembler webassemblyinfo windowsmanifest x86 x86asmparser x86codegen x86desc x86disassembler x86info x86utils xray" "--llvm-cxxflags" "-I/Users/runner/runners/2.160.0/work/1/s/src/llvm-project/llvm/include -I/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/llvm/build/include -std=c++11 -stdlib=libc++ -fno-exceptions -fno-rtti -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS" "--ar" "ar" "--llvm-bin-dir" "/Users/runner/runners/2.160.0/work/1/s/build/i686-apple-darwin/llvm/build/bin" "--adb-path" "adb" "--adb-test-dir" "/data/tmp/work" "--android-cross-path" "" "--color" "always"
2019-11-03T03:22:52.5660100Z 2019-11-03T03:22:52.5660150Z 2019-11-03T03:22:52.5660260Z failed to run: /Users/runner/runners/2.160.0/work/1/s/build/bootstrap/debug/bootstrap test
2019-11-03T03:22:52.5660370Z Build completed unsuccessfully in 1:36:23
2019-11-03T03:22:52.5660370Z Build completed unsuccessfully in 1:36:23
2019-11-03T03:22:52.5713770Z == clock drift check ==
2019-11-03T03:22:52.5779620Z local time: Sun Nov 3 03:22:52 UTC 2019
2019-11-03T03:22:52.6155370Z network time: Sun, 03 Nov 2019 03:22:52 GMT
2019-11-03T03:22:52.6157410Z == end clock drift check ==
2019-11-03T03:22:52.6208300Z 2019-11-03T03:22:52.6339590Z ##[error]Bash exited with code '1'.
2019-11-03T03:22:52.6385330Z ##[section]Starting: Checkout
2019-11-03T03:22:52.6388240Z ==============================================================================
2019-11-03T03:22:52.6388370Z Task : Get sources
2019-11-03T03:22:52.6388470Z Description : Get sources from a repository. Supports Git, TfsVC, and SVN repositories.

I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact @TimNN. (Feature Requests)

bors · 2019-11-03T03:24:48Z

💔 Test failed - checks-azure

This allows catch_panic to ignore C++ exceptions.

Amanieu · 2019-11-03T17:05:00Z

@bors r=nikomatsakis

bors · 2019-11-03T17:05:02Z

📌 Commit f223e0d has been approved by nikomatsakis

bors · 2019-11-03T18:37:04Z

⌛ Testing commit f223e0d with merge b520af6...

bors · 2019-11-03T21:55:42Z

☀️ Test successful - checks-azure
Approved by: nikomatsakis
Pushing b520af6 to master...

rust-highfive assigned alexcrichton Oct 21, 2019

rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Oct 21, 2019

Amanieu force-pushed the foreign-exceptions branch 2 times, most recently from c7cd231 to 2c074a4Compare October 21, 2019 11:53

dgrunwald reviewed Oct 21, 2019
View reviewed changes

Comment threadsrc/test/run-make-fulldeps/foreign-exceptions/foo.cpp Outdated

Centril added I-nominated T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-lang Relevant to the language team T-libs-api [DEPRECATED; DO NOT USE] labels Oct 21, 2019

Amanieu force-pushed the foreign-exceptions branch from bffd426 to 40ef77eCompare October 21, 2019 15:28

bors removed the S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. label Nov 2, 2019

Amanieu added 7 commits November 3, 2019 14:03

Add -lstdc++ for run-make-fulldeps tests on MinGW
246c606

Enable C++ exceptions on MSVC when building C++ tests
9a8bb3a

Allow foreign exceptions to unwind through Rust code
5f1a0af

Hack to make C++ exceptions test work on i686-pc-windows-gnu
83d6bf4

Make SEH exceptions use a rust_panic type instead of unsigned __int64*
ad61c88

Make Emscripten unwinding use a valid type_info
76660fd
This allows catch_panic to ignore C++ exceptions.

Fix macOS tests
f223e0d

bors mentioned this pull request Nov 3, 2019
Create compilation target versions of ::alloc::Layout#64299
Closed

leo60228 mentioned this pull request Nov 14, 2019
Demangle C++ functions in backtraces #66416
Open

Amanieu mentioned this pull request Dec 8, 2019
Panic/SIGSEGV in unwind cleanup #66781
Closed

cuviper mentioned this pull request Dec 11, 2019
run-make-fulldeps/foreign-exceptions loops on armv7-unknown-linux-gnueabihf #67242
Closed

kjvalencik mentioned this pull request Jun 28, 2020
(wip) try_catch neon-bindings/neon#533
Closed

kjvalencik mentioned this pull request Jul 9, 2020
try_catch neon-bindings/neon#543
Merged
10 tasks

BatmanAoD mentioned this pull request Mar 4, 2022
Attempts to catch_unwind (on Linux) result in SIGABRT PyO3/pyo3#2102
Open

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