├── .gitignore ├── .rustfmt.toml ├── COPYRIGHT ├── Cargo.toml ├── LICENSE-APACHE ├── LICENSE-Apache-2.0_WITH_LLVM-exception ├── LICENSE-MIT ├── README.md ├── examples ├── dbg.rs ├── hello.rs ├── log.rs ├── more.rs ├── threads.rs ├── too_long.rs └── unicode.rs └── src ├── lib.rs └── log.rs /.gitignore: -------------------------------------------------------------------------------- 1 | /target 2 | /Cargo.lock 3 | -------------------------------------------------------------------------------- /.rustfmt.toml: -------------------------------------------------------------------------------- 1 | # This file tells tools we use rustfmt. We use the default settings. 2 | -------------------------------------------------------------------------------- /COPYRIGHT: -------------------------------------------------------------------------------- 1 | Short version for non-lawyers: 2 | 3 | `atomic-dbg` is triple-licensed under Apache 2.0 with the LLVM Exception, 4 | Apache 2.0, and MIT terms. 5 | 6 | 7 | Longer version: 8 | 9 | Copyrights in the `atomic-dbg` project are retained by their contributors. 10 | No copyright assignment is required to contribute to the `atomic-dbg` 11 | project. 12 | 13 | Some files include code derived from Rust's `libstd`; see the comments in 14 | the code for details. 15 | 16 | Except as otherwise noted (below and/or in individual files), `atomic-dbg` 17 | is licensed under: 18 | 19 | - the Apache License, Version 2.0, with the LLVM Exception 20 | or 21 | 22 | - the Apache License, Version 2.0 23 | or 24 | , 25 | - or the MIT license 26 | or 27 | , 28 | 29 | at your option. 30 | -------------------------------------------------------------------------------- /Cargo.toml: -------------------------------------------------------------------------------- 1 | [package] 2 | name = "atomic-dbg" 3 | version = "0.1.11" 4 | authors = ["Dan Gohman "] 5 | description = "Atomic `dbg`/`eprintln`/`eprint` macros" 6 | documentation = "https://docs.rs/atomic-dbg" 7 | license = "Apache-2.0 WITH LLVM-exception OR Apache-2.0 OR MIT" 8 | repository = "https://github.com/sunfishcode/atomic-dbg" 9 | edition = "2021" 10 | keywords = ["printing", "print", "macros", "stderr"] 11 | categories = ["development-tools"] 12 | exclude = ["/.*"] 13 | 14 | [target.'cfg(unix)'.dependencies] 15 | rustix = { version = "1.0.0", default-features = false, features = ["stdio", "pipe"] } 16 | errno = { version = "0.3.0", default-features = false, optional = true } 17 | log = { version = "0.4", default-features = false, optional = true } 18 | 19 | [target.'cfg(windows)'.dependencies.windows-sys] 20 | version = "0.59.0" 21 | features = [ 22 | "Win32_Foundation", 23 | "Win32_System_Console", 24 | "Win32_Storage_FileSystem", 25 | "Win32_System_IO", 26 | ] 27 | 28 | [target.'cfg(windows)'.dependencies] 29 | io-lifetimes = { version = "2.0.0", default-features = false } 30 | 31 | [features] 32 | default = ["errno"] 33 | -------------------------------------------------------------------------------- /LICENSE-APACHE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. Definitions. 8 | 9 | "License" shall mean the terms and conditions for use, reproduction, 10 | and distribution as defined by Sections 1 through 9 of this document. 11 | 12 | "Licensor" shall mean the copyright owner or entity authorized by 13 | the copyright owner that is granting the License. 14 | 15 | "Legal Entity" shall mean the union of the acting entity and all 16 | other entities that control, are controlled by, or are under common 17 | control with that entity. For the purposes of this definition, 18 | "control" means (i) the power, direct or indirect, to cause the 19 | direction or management of such entity, whether by contract or 20 | otherwise, or (ii) ownership of fifty percent (50%) or more of the 21 | outstanding shares, or (iii) beneficial ownership of such entity. 22 | 23 | "You" (or "Your") shall mean an individual or Legal Entity 24 | exercising permissions granted by this License. 25 | 26 | "Source" form shall mean the preferred form for making modifications, 27 | including but not limited to software source code, documentation 28 | source, and configuration files. 29 | 30 | "Object" form shall mean any form resulting from mechanical 31 | transformation or translation of a Source form, including but 32 | not limited to compiled object code, generated documentation, 33 | and conversions to other media types. 34 | 35 | "Work" shall mean the work of authorship, whether in Source or 36 | Object form, made available under the License, as indicated by a 37 | copyright notice that is included in or attached to the work 38 | (an example is provided in the Appendix below). 39 | 40 | "Derivative Works" shall mean any work, whether in Source or Object 41 | form, that is based on (or derived from) the Work and for which the 42 | editorial revisions, annotations, elaborations, or other modifications 43 | represent, as a whole, an original work of authorship. For the purposes 44 | of this License, Derivative Works shall not include works that remain 45 | separable from, or merely link (or bind by name) to the interfaces of, 46 | the Work and Derivative Works thereof. 47 | 48 | "Contribution" shall mean any work of authorship, including 49 | the original version of the Work and any modifications or additions 50 | to that Work or Derivative Works thereof, that is intentionally 51 | submitted to Licensor for inclusion in the Work by the copyright owner 52 | or by an individual or Legal Entity authorized to submit on behalf of 53 | the copyright owner. For the purposes of this definition, "submitted" 54 | means any form of electronic, verbal, or written communication sent 55 | to the Licensor or its representatives, including but not limited to 56 | communication on electronic mailing lists, source code control systems, 57 | and issue tracking systems that are managed by, or on behalf of, the 58 | Licensor for the purpose of discussing and improving the Work, but 59 | excluding communication that is conspicuously marked or otherwise 60 | designated in writing by the copyright owner as "Not a Contribution." 61 | 62 | "Contributor" shall mean Licensor and any individual or Legal Entity 63 | on behalf of whom a Contribution has been received by Licensor and 64 | subsequently incorporated within the Work. 65 | 66 | 2. Grant of Copyright License. Subject to the terms and conditions of 67 | this License, each Contributor hereby grants to You a perpetual, 68 | worldwide, non-exclusive, no-charge, royalty-free, irrevocable 69 | copyright license to reproduce, prepare Derivative Works of, 70 | publicly display, publicly perform, sublicense, and distribute the 71 | Work and such Derivative Works in Source or Object form. 72 | 73 | 3. Grant of Patent License. Subject to the terms and conditions of 74 | this License, each Contributor hereby grants to You a perpetual, 75 | worldwide, non-exclusive, no-charge, royalty-free, irrevocable 76 | (except as stated in this section) patent license to make, have made, 77 | use, offer to sell, sell, import, and otherwise transfer the Work, 78 | where such license applies only to those patent claims licensable 79 | by such Contributor that are necessarily infringed by their 80 | Contribution(s) alone or by combination of their Contribution(s) 81 | with the Work to which such Contribution(s) was submitted. If You 82 | institute patent litigation against any entity (including a 83 | cross-claim or counterclaim in a lawsuit) alleging that the Work 84 | or a Contribution incorporated within the Work constitutes direct 85 | or contributory patent infringement, then any patent licenses 86 | granted to You under this License for that Work shall terminate 87 | as of the date such litigation is filed. 88 | 89 | 4. Redistribution. You may reproduce and distribute copies of the 90 | Work or Derivative Works thereof in any medium, with or without 91 | modifications, and in Source or Object form, provided that You 92 | meet the following conditions: 93 | 94 | (a) You must give any other recipients of the Work or 95 | Derivative Works a copy of this License; and 96 | 97 | (b) You must cause any modified files to carry prominent notices 98 | stating that You changed the files; and 99 | 100 | (c) You must retain, in the Source form of any Derivative Works 101 | that You distribute, all copyright, patent, trademark, and 102 | attribution notices from the Source form of the Work, 103 | excluding those notices that do not pertain to any part of 104 | the Derivative Works; and 105 | 106 | (d) If the Work includes a "NOTICE" text file as part of its 107 | distribution, then any Derivative Works that You distribute must 108 | include a readable copy of the attribution notices contained 109 | within such NOTICE file, excluding those notices that do not 110 | pertain to any part of the Derivative Works, in at least one 111 | of the following places: within a NOTICE text file distributed 112 | as part of the Derivative Works; within the Source form or 113 | documentation, if provided along with the Derivative Works; or, 114 | within a display generated by the Derivative Works, if and 115 | wherever such third-party notices normally appear. The contents 116 | of the NOTICE file are for informational purposes only and 117 | do not modify the License. You may add Your own attribution 118 | notices within Derivative Works that You distribute, alongside 119 | or as an addendum to the NOTICE text from the Work, provided 120 | that such additional attribution notices cannot be construed 121 | as modifying the License. 122 | 123 | You may add Your own copyright statement to Your modifications and 124 | may provide additional or different license terms and conditions 125 | for use, reproduction, or distribution of Your modifications, or 126 | for any such Derivative Works as a whole, provided Your use, 127 | reproduction, and distribution of the Work otherwise complies with 128 | the conditions stated in this License. 129 | 130 | 5. Submission of Contributions. Unless You explicitly state otherwise, 131 | any Contribution intentionally submitted for inclusion in the Work 132 | by You to the Licensor shall be under the terms and conditions of 133 | this License, without any additional terms or conditions. 134 | Notwithstanding the above, nothing herein shall supersede or modify 135 | the terms of any separate license agreement you may have executed 136 | with Licensor regarding such Contributions. 137 | 138 | 6. Trademarks. This License does not grant permission to use the trade 139 | names, trademarks, service marks, or product names of the Licensor, 140 | except as required for reasonable and customary use in describing the 141 | origin of the Work and reproducing the content of the NOTICE file. 142 | 143 | 7. Disclaimer of Warranty. Unless required by applicable law or 144 | agreed to in writing, Licensor provides the Work (and each 145 | Contributor provides its Contributions) on an "AS IS" BASIS, 146 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or 147 | implied, including, without limitation, any warranties or conditions 148 | of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A 149 | PARTICULAR PURPOSE. You are solely responsible for determining the 150 | appropriateness of using or redistributing the Work and assume any 151 | risks associated with Your exercise of permissions under this License. 152 | 153 | 8. Limitation of Liability. In no event and under no legal theory, 154 | whether in tort (including negligence), contract, or otherwise, 155 | unless required by applicable law (such as deliberate and grossly 156 | negligent acts) or agreed to in writing, shall any Contributor be 157 | liable to You for damages, including any direct, indirect, special, 158 | incidental, or consequential damages of any character arising as a 159 | result of this License or out of the use or inability to use the 160 | Work (including but not limited to damages for loss of goodwill, 161 | work stoppage, computer failure or malfunction, or any and all 162 | other commercial damages or losses), even if such Contributor 163 | has been advised of the possibility of such damages. 164 | 165 | 9. Accepting Warranty or Additional Liability. While redistributing 166 | the Work or Derivative Works thereof, You may choose to offer, 167 | and charge a fee for, acceptance of support, warranty, indemnity, 168 | or other liability obligations and/or rights consistent with this 169 | License. However, in accepting such obligations, You may act only 170 | on Your own behalf and on Your sole responsibility, not on behalf 171 | of any other Contributor, and only if You agree to indemnify, 172 | defend, and hold each Contributor harmless for any liability 173 | incurred by, or claims asserted against, such Contributor by reason 174 | of your accepting any such warranty or additional liability. 175 | 176 | END OF TERMS AND CONDITIONS 177 | 178 | APPENDIX: How to apply the Apache License to your work. 179 | 180 | To apply the Apache License to your work, attach the following 181 | boilerplate notice, with the fields enclosed by brackets "[]" 182 | replaced with your own identifying information. (Don't include 183 | the brackets!) The text should be enclosed in the appropriate 184 | comment syntax for the file format. We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright [yyyy] [name of copyright owner] 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | -------------------------------------------------------------------------------- /LICENSE-Apache-2.0_WITH_LLVM-exception: -------------------------------------------------------------------------------- 1 | 2 | Apache License 3 | Version 2.0, January 2004 4 | http://www.apache.org/licenses/ 5 | 6 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 7 | 8 | 1. Definitions. 9 | 10 | "License" shall mean the terms and conditions for use, reproduction, 11 | and distribution as defined by Sections 1 through 9 of this document. 12 | 13 | "Licensor" shall mean the copyright owner or entity authorized by 14 | the copyright owner that is granting the License. 15 | 16 | "Legal Entity" shall mean the union of the acting entity and all 17 | other entities that control, are controlled by, or are under common 18 | control with that entity. For the purposes of this definition, 19 | "control" means (i) the power, direct or indirect, to cause the 20 | direction or management of such entity, whether by contract or 21 | otherwise, or (ii) ownership of fifty percent (50%) or more of the 22 | outstanding shares, or (iii) beneficial ownership of such entity. 23 | 24 | "You" (or "Your") shall mean an individual or Legal Entity 25 | exercising permissions granted by this License. 26 | 27 | "Source" form shall mean the preferred form for making modifications, 28 | including but not limited to software source code, documentation 29 | source, and configuration files. 30 | 31 | "Object" form shall mean any form resulting from mechanical 32 | transformation or translation of a Source form, including but 33 | not limited to compiled object code, generated documentation, 34 | and conversions to other media types. 35 | 36 | "Work" shall mean the work of authorship, whether in Source or 37 | Object form, made available under the License, as indicated by a 38 | copyright notice that is included in or attached to the work 39 | (an example is provided in the Appendix below). 40 | 41 | "Derivative Works" shall mean any work, whether in Source or Object 42 | form, that is based on (or derived from) the Work and for which the 43 | editorial revisions, annotations, elaborations, or other modifications 44 | represent, as a whole, an original work of authorship. For the purposes 45 | of this License, Derivative Works shall not include works that remain 46 | separable from, or merely link (or bind by name) to the interfaces of, 47 | the Work and Derivative Works thereof. 48 | 49 | "Contribution" shall mean any work of authorship, including 50 | the original version of the Work and any modifications or additions 51 | to that Work or Derivative Works thereof, that is intentionally 52 | submitted to Licensor for inclusion in the Work by the copyright owner 53 | or by an individual or Legal Entity authorized to submit on behalf of 54 | the copyright owner. For the purposes of this definition, "submitted" 55 | means any form of electronic, verbal, or written communication sent 56 | to the Licensor or its representatives, including but not limited to 57 | communication on electronic mailing lists, source code control systems, 58 | and issue tracking systems that are managed by, or on behalf of, the 59 | Licensor for the purpose of discussing and improving the Work, but 60 | excluding communication that is conspicuously marked or otherwise 61 | designated in writing by the copyright owner as "Not a Contribution." 62 | 63 | "Contributor" shall mean Licensor and any individual or Legal Entity 64 | on behalf of whom a Contribution has been received by Licensor and 65 | subsequently incorporated within the Work. 66 | 67 | 2. Grant of Copyright License. Subject to the terms and conditions of 68 | this License, each Contributor hereby grants to You a perpetual, 69 | worldwide, non-exclusive, no-charge, royalty-free, irrevocable 70 | copyright license to reproduce, prepare Derivative Works of, 71 | publicly display, publicly perform, sublicense, and distribute the 72 | Work and such Derivative Works in Source or Object form. 73 | 74 | 3. Grant of Patent License. Subject to the terms and conditions of 75 | this License, each Contributor hereby grants to You a perpetual, 76 | worldwide, non-exclusive, no-charge, royalty-free, irrevocable 77 | (except as stated in this section) patent license to make, have made, 78 | use, offer to sell, sell, import, and otherwise transfer the Work, 79 | where such license applies only to those patent claims licensable 80 | by such Contributor that are necessarily infringed by their 81 | Contribution(s) alone or by combination of their Contribution(s) 82 | with the Work to which such Contribution(s) was submitted. If You 83 | institute patent litigation against any entity (including a 84 | cross-claim or counterclaim in a lawsuit) alleging that the Work 85 | or a Contribution incorporated within the Work constitutes direct 86 | or contributory patent infringement, then any patent licenses 87 | granted to You under this License for that Work shall terminate 88 | as of the date such litigation is filed. 89 | 90 | 4. Redistribution. You may reproduce and distribute copies of the 91 | Work or Derivative Works thereof in any medium, with or without 92 | modifications, and in Source or Object form, provided that You 93 | meet the following conditions: 94 | 95 | (a) You must give any other recipients of the Work or 96 | Derivative Works a copy of this License; and 97 | 98 | (b) You must cause any modified files to carry prominent notices 99 | stating that You changed the files; and 100 | 101 | (c) You must retain, in the Source form of any Derivative Works 102 | that You distribute, all copyright, patent, trademark, and 103 | attribution notices from the Source form of the Work, 104 | excluding those notices that do not pertain to any part of 105 | the Derivative Works; and 106 | 107 | (d) If the Work includes a "NOTICE" text file as part of its 108 | distribution, then any Derivative Works that You distribute must 109 | include a readable copy of the attribution notices contained 110 | within such NOTICE file, excluding those notices that do not 111 | pertain to any part of the Derivative Works, in at least one 112 | of the following places: within a NOTICE text file distributed 113 | as part of the Derivative Works; within the Source form or 114 | documentation, if provided along with the Derivative Works; or, 115 | within a display generated by the Derivative Works, if and 116 | wherever such third-party notices normally appear. The contents 117 | of the NOTICE file are for informational purposes only and 118 | do not modify the License. You may add Your own attribution 119 | notices within Derivative Works that You distribute, alongside 120 | or as an addendum to the NOTICE text from the Work, provided 121 | that such additional attribution notices cannot be construed 122 | as modifying the License. 123 | 124 | You may add Your own copyright statement to Your modifications and 125 | may provide additional or different license terms and conditions 126 | for use, reproduction, or distribution of Your modifications, or 127 | for any such Derivative Works as a whole, provided Your use, 128 | reproduction, and distribution of the Work otherwise complies with 129 | the conditions stated in this License. 130 | 131 | 5. Submission of Contributions. Unless You explicitly state otherwise, 132 | any Contribution intentionally submitted for inclusion in the Work 133 | by You to the Licensor shall be under the terms and conditions of 134 | this License, without any additional terms or conditions. 135 | Notwithstanding the above, nothing herein shall supersede or modify 136 | the terms of any separate license agreement you may have executed 137 | with Licensor regarding such Contributions. 138 | 139 | 6. Trademarks. This License does not grant permission to use the trade 140 | names, trademarks, service marks, or product names of the Licensor, 141 | except as required for reasonable and customary use in describing the 142 | origin of the Work and reproducing the content of the NOTICE file. 143 | 144 | 7. Disclaimer of Warranty. Unless required by applicable law or 145 | agreed to in writing, Licensor provides the Work (and each 146 | Contributor provides its Contributions) on an "AS IS" BASIS, 147 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or 148 | implied, including, without limitation, any warranties or conditions 149 | of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A 150 | PARTICULAR PURPOSE. You are solely responsible for determining the 151 | appropriateness of using or redistributing the Work and assume any 152 | risks associated with Your exercise of permissions under this License. 153 | 154 | 8. Limitation of Liability. In no event and under no legal theory, 155 | whether in tort (including negligence), contract, or otherwise, 156 | unless required by applicable law (such as deliberate and grossly 157 | negligent acts) or agreed to in writing, shall any Contributor be 158 | liable to You for damages, including any direct, indirect, special, 159 | incidental, or consequential damages of any character arising as a 160 | result of this License or out of the use or inability to use the 161 | Work (including but not limited to damages for loss of goodwill, 162 | work stoppage, computer failure or malfunction, or any and all 163 | other commercial damages or losses), even if such Contributor 164 | has been advised of the possibility of such damages. 165 | 166 | 9. Accepting Warranty or Additional Liability. While redistributing 167 | the Work or Derivative Works thereof, You may choose to offer, 168 | and charge a fee for, acceptance of support, warranty, indemnity, 169 | or other liability obligations and/or rights consistent with this 170 | License. However, in accepting such obligations, You may act only 171 | on Your own behalf and on Your sole responsibility, not on behalf 172 | of any other Contributor, and only if You agree to indemnify, 173 | defend, and hold each Contributor harmless for any liability 174 | incurred by, or claims asserted against, such Contributor by reason 175 | of your accepting any such warranty or additional liability. 176 | 177 | END OF TERMS AND CONDITIONS 178 | 179 | APPENDIX: How to apply the Apache License to your work. 180 | 181 | To apply the Apache License to your work, attach the following 182 | boilerplate notice, with the fields enclosed by brackets "[]" 183 | replaced with your own identifying information. (Don't include 184 | the brackets!) The text should be enclosed in the appropriate 185 | comment syntax for the file format. We also recommend that a 186 | file or class name and description of purpose be included on the 187 | same "printed page" as the copyright notice for easier 188 | identification within third-party archives. 189 | 190 | Copyright [yyyy] [name of copyright owner] 191 | 192 | Licensed under the Apache License, Version 2.0 (the "License"); 193 | you may not use this file except in compliance with the License. 194 | You may obtain a copy of the License at 195 | 196 | http://www.apache.org/licenses/LICENSE-2.0 197 | 198 | Unless required by applicable law or agreed to in writing, software 199 | distributed under the License is distributed on an "AS IS" BASIS, 200 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 201 | See the License for the specific language governing permissions and 202 | limitations under the License. 203 | 204 | 205 | --- LLVM Exceptions to the Apache 2.0 License ---- 206 | 207 | As an exception, if, as a result of your compiling your source code, portions 208 | of this Software are embedded into an Object form of such source code, you 209 | may redistribute such embedded portions in such Object form without complying 210 | with the conditions of Sections 4(a), 4(b) and 4(d) of the License. 211 | 212 | In addition, if you combine or link compiled forms of this Software with 213 | software that is licensed under the GPLv2 ("Combined Software") and if a 214 | court of competent jurisdiction determines that the patent provision (Section 215 | 3), the indemnity provision (Section 9) or other Section of the License 216 | conflicts with the conditions of the GPLv2, you may retroactively and 217 | prospectively choose to deem waived or otherwise exclude such Section(s) of 218 | the License, but only in their entirety and only with respect to the Combined 219 | Software. 220 | 221 | -------------------------------------------------------------------------------- /LICENSE-MIT: -------------------------------------------------------------------------------- 1 | Permission is hereby granted, free of charge, to any 2 | person obtaining a copy of this software and associated 3 | documentation files (the "Software"), to deal in the 4 | Software without restriction, including without 5 | limitation the rights to use, copy, modify, merge, 6 | publish, distribute, sublicense, and/or sell copies of 7 | the Software, and to permit persons to whom the Software 8 | is furnished to do so, subject to the following 9 | conditions: 10 | 11 | The above copyright notice and this permission notice 12 | shall be included in all copies or substantial portions 13 | of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF 16 | ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED 17 | TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A 18 | PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT 19 | SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 20 | CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 21 | OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR 22 | IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 23 | DEALINGS IN THE SOFTWARE. 24 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # atomic-dbg 2 | 3 |

4 | crates.io page 5 | docs.rs docs 6 |

7 | 8 | This crate provides [`dbg`], [`eprint`], and [`eprintln`], macros which work 9 | just like their [counterparts] [in] [std], but which: 10 | 11 | - Write atomically, up to the greatest length supported on the platform. 12 | - Don't use locks (in userspace) or dynamic allocations. 13 | - Preserve libc's `errno` and Windows' last-error code value. 14 | 15 | This means they can be used just about anywhere within a program, including 16 | inside allocator implementations, inside synchronization primitives, startup 17 | code, around FFI calls, inside signal handlers, and in the child process of a 18 | `fork` before an `exec`. 19 | 20 | And, when multiple threads are printing, as long as they're within the length 21 | supported on the platform, the output is readable instead of potentially 22 | interleaved with other output. 23 | 24 | For example, this code: 25 | ```rust 26 | use atomic_dbg::dbg; 27 | 28 | fn main() { 29 | dbg!(2, 3, 4); 30 | } 31 | ``` 32 | 33 | Has this strace output: 34 | ```notrust 35 | write(2, "[examples/dbg.rs:4] 2 = 2\n[examples/dbg.rs:4] 3 = 3\n[examples/dbg.rs:4] 4 = 4\n", 78[examples/dbg.rs:4] 2 = 2 36 | ``` 37 | which is a single atomic `write` call. 38 | 39 | For comparison, with `std::dbg` it looks like this: 40 | ```notrust 41 | write(2, "[", 1[) = 1 42 | write(2, "examples/dbg.rs", 15examples/dbg.rs) = 15 43 | write(2, ":", 1:) = 1 44 | write(2, "4", 14) = 1 45 | write(2, "] ", 2] ) = 2 46 | write(2, "2", 12) = 1 47 | write(2, " = ", 3 = ) = 3 48 | write(2, "2", 12) = 1 49 | write(2, "\n", 1 50 | ) = 1 51 | write(2, "[", 1[) = 1 52 | write(2, "examples/dbg.rs", 15examples/dbg.rs) = 15 53 | write(2, ":", 1:) = 1 54 | write(2, "4", 14) = 1 55 | write(2, "] ", 2] ) = 2 56 | write(2, "3", 13) = 1 57 | write(2, " = ", 3 = ) = 3 58 | write(2, "3", 13) = 1 59 | write(2, "\n", 1 60 | ) = 1 61 | write(2, "[", 1[) = 1 62 | write(2, "examples/dbg.rs", 15examples/dbg.rs) = 15 63 | write(2, ":", 1:) = 1 64 | write(2, "4", 14) = 1 65 | write(2, "] ", 2] ) = 2 66 | write(2, "4", 14) = 1 67 | write(2, " = ", 3 = ) = 3 68 | write(2, "4", 14) = 1 69 | write(2, "\n", 1 70 | ) = 1 71 | ``` 72 | 73 | atomic-dbg is `no_std`, however like `std`, it uses the stderr file descriptor 74 | ambiently, assuming that it's open. 75 | 76 | ## Logging 77 | 78 | With the "log" feature enabled, atomic-dbg defines an `atomic_dbg::log::init` 79 | which installed a minimal logging implementation using the `eprintln` macro. 80 | 81 | [counterparts]: https://doc.rust-lang.org/stable/std/macro.dbg.html 82 | [in]: https://doc.rust-lang.org/stable/std/macro.eprintln.html 83 | [std]: https://doc.rust-lang.org/stable/std/macro.eprint.html 84 | [`dbg`]: https://docs.rs/atomic-dbg/latest/atomic-dbg/macro.dbg.html 85 | [`eprintln`]: https://docs.rs/atomic-dbg/latest/atomic-dbg/macro.eprintln.html 86 | [`eprint`]: https://docs.rs/atomic-dbg/latest/atomic-dbg/macro.eprint.html 87 | -------------------------------------------------------------------------------- /examples/dbg.rs: -------------------------------------------------------------------------------- 1 | use atomic_dbg::dbg; 2 | 3 | fn main() { 4 | // This is written as a single system call! 5 | dbg!(2, 3, 4); 6 | } 7 | -------------------------------------------------------------------------------- /examples/hello.rs: -------------------------------------------------------------------------------- 1 | use atomic_dbg::eprintln; 2 | 3 | fn main() { 4 | eprintln!("Hello, World!"); 5 | } 6 | -------------------------------------------------------------------------------- /examples/log.rs: -------------------------------------------------------------------------------- 1 | #[cfg(feature = "log")] 2 | fn main() { 3 | atomic_dbg::log::init(); 4 | log::trace!("This is an TRACE log message!"); 5 | log::debug!("This is an DEBUG log message!"); 6 | log::info!("This is an INFO log message!"); 7 | log::warn!("This is an WARN log message!"); 8 | log::error!("This is an ERROR log message!"); 9 | } 10 | 11 | #[cfg(not(feature = "log"))] 12 | fn main() -> Result<(), &'static str> { 13 | Err("This example requires --features=log.") 14 | } 15 | -------------------------------------------------------------------------------- /examples/more.rs: -------------------------------------------------------------------------------- 1 | use atomic_dbg::{eprint, eprintln}; 2 | 3 | fn main() { 4 | let a = 2; 5 | let b = 3.5; 6 | let c = "purple"; 7 | 8 | // Fancy new-style format strings! 9 | eprintln!("{a}, {b}, {c}"); 10 | 11 | // The old way still works! 12 | eprintln!("{}, {}, {}", a, b, c); 13 | 14 | // Debug formatting works too! 15 | eprintln!("{:?}, {:?}, {:?}", a, b, c); 16 | 17 | // Non-atomic hello world, because we can! 18 | eprint!("Hello, "); 19 | eprint!("World!"); 20 | eprintln!(); 21 | } 22 | -------------------------------------------------------------------------------- /examples/threads.rs: -------------------------------------------------------------------------------- 1 | //! Threads demo. 2 | //! 3 | //! This program spawns two threads. One does a `dbg` that prints 4 | //! even numbers, the other does a `dbg` that prints odd numbers. 5 | //! 6 | //! Comment out the `use atomic_dbg::dbg;` line to use `std::dbg`. Run 7 | //! it that way enough times, and you'll see the output of the two 8 | //! threads interleave. 9 | //! 10 | //! std uses a `StderrLock`, so the interleaving only happens at line 11 | //! boundaries. But if there's any non-Rust code in the process 12 | //! printing to stderr from other threads, it could be interleaved 13 | //! in the middle of a line. 14 | //! 15 | //! Uncomment that line to re-enable atomic-dbg and 16 | //! the output will not be interleaved. Each thread does a single 17 | //! atomic `write` call. 18 | 19 | use atomic_dbg::dbg; 20 | use std::thread; 21 | 22 | fn main() { 23 | let evens = thread::Builder::new() 24 | .name("evens".to_string()) 25 | .spawn(move || { 26 | dbg!(0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24); 27 | }) 28 | .unwrap(); 29 | let odds = thread::Builder::new() 30 | .name("odds".to_string()) 31 | .spawn(move || { 32 | dbg!(1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25); 33 | }) 34 | .unwrap(); 35 | evens.join().unwrap(); 36 | odds.join().unwrap(); 37 | } 38 | -------------------------------------------------------------------------------- /examples/too_long.rs: -------------------------------------------------------------------------------- 1 | //! An example using a really long string that ends up being non-atomic. 2 | //! 3 | //! Platforms only supports atomic writes up to a certain length. Beyond that, 4 | //! we can't guarantee atomicity. This program is longer than most platforms' 5 | //! supported lengths. 6 | 7 | use atomic_dbg::eprintln; 8 | 9 | fn main() { 10 | eprintln!( 11 | "Hello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!\nHello, World!" 12 | ); 13 | } 14 | -------------------------------------------------------------------------------- /examples/unicode.rs: -------------------------------------------------------------------------------- 1 | use atomic_dbg::eprintln; 2 | 3 | fn main() { 4 | // Got Unicode? 5 | eprintln!("Ⓗⓔⓛⓛⓞ, Ⓤⓝⓘⓒⓞⓓⓔ!! 🐈"); 6 | } 7 | -------------------------------------------------------------------------------- /src/lib.rs: -------------------------------------------------------------------------------- 1 | #![doc = include_str!("../README.md")] 2 | #![cfg_attr(not(windows), no_std)] 3 | 4 | #[cfg(feature = "log")] 5 | pub mod log; 6 | 7 | use core::cmp::min; 8 | use core::fmt::{self, Write}; 9 | #[cfg(windows)] 10 | use { 11 | core::ptr::null_mut, 12 | io_lifetimes::BorrowedHandle, 13 | std::io::IsTerminal, 14 | windows_sys::Win32::Foundation::{GetLastError, SetLastError, HANDLE}, 15 | windows_sys::Win32::Storage::FileSystem::WriteFile, 16 | windows_sys::Win32::System::Console::STD_ERROR_HANDLE, 17 | windows_sys::Win32::System::Console::{GetStdHandle, WriteConsoleW}, 18 | }; 19 | 20 | // No specific size is documented, so just pick a number. 21 | #[cfg(windows)] 22 | const BUF_LEN: usize = 4096; 23 | 24 | struct Writer { 25 | pos: usize, 26 | 27 | // `PIPE_BUF` is the biggest buffer we can write atomically. 28 | #[cfg(unix)] 29 | buf: [u8; rustix::pipe::PIPE_BUF], 30 | 31 | #[cfg(windows)] 32 | buf: [u8; BUF_LEN], 33 | 34 | // A buffer of UTF-16, for the Windows console. 35 | #[cfg(windows)] 36 | console_buf: [u16; BUF_LEN], 37 | 38 | #[cfg(windows)] 39 | console_pos: usize, 40 | 41 | #[cfg(feature = "errno")] 42 | #[cfg(unix)] 43 | saved_errno: errno::Errno, 44 | 45 | #[cfg(windows)] 46 | saved_error: u32, 47 | } 48 | 49 | impl Writer { 50 | fn new() -> Self { 51 | Self { 52 | pos: 0, 53 | 54 | #[cfg(unix)] 55 | buf: [0_u8; rustix::pipe::PIPE_BUF], 56 | 57 | #[cfg(windows)] 58 | buf: [0_u8; BUF_LEN], 59 | 60 | #[cfg(windows)] 61 | console_buf: [0_u16; BUF_LEN], 62 | 63 | #[cfg(windows)] 64 | console_pos: 0, 65 | 66 | #[cfg(feature = "errno")] 67 | #[cfg(unix)] 68 | saved_errno: errno::errno(), 69 | 70 | #[cfg(windows)] 71 | saved_error: unsafe { GetLastError() }, 72 | } 73 | } 74 | 75 | fn flush(&mut self) { 76 | #[cfg(unix)] 77 | { 78 | self.flush_buf().unwrap(); 79 | } 80 | 81 | #[cfg(windows)] 82 | { 83 | let stderr = unsafe { GetStdHandle(STD_ERROR_HANDLE) }; 84 | if unsafe { BorrowedHandle::borrow_raw(stderr as _) }.is_terminal() { 85 | self.flush_console(stderr) 86 | } else { 87 | self.flush_buf() 88 | } 89 | .unwrap(); 90 | } 91 | } 92 | 93 | fn flush_buf(&mut self) -> fmt::Result { 94 | let mut s = &self.buf[..self.pos]; 95 | 96 | // SAFETY: Users using `dbg`/`eprintln`/`eprint` APIs should be aware 97 | // that these assume that the stderr file descriptor is open and valid 98 | // to write to. 99 | #[cfg(unix)] 100 | let stderr = unsafe { rustix::stdio::stderr() }; 101 | 102 | #[cfg(windows)] 103 | let stderr = unsafe { GetStdHandle(STD_ERROR_HANDLE) }; 104 | 105 | while !s.is_empty() { 106 | #[cfg(unix)] 107 | match rustix::io::write(stderr, s) { 108 | Ok(n) => s = &s[n..], 109 | Err(rustix::io::Errno::INTR) => (), 110 | Err(_) => return Err(fmt::Error), 111 | } 112 | 113 | #[cfg(windows)] 114 | unsafe { 115 | let mut n = 0; 116 | if WriteFile( 117 | stderr, 118 | s.as_ptr().cast(), 119 | min(s.len(), u32::MAX as usize) as u32, 120 | &mut n, 121 | null_mut(), 122 | ) == 0 123 | { 124 | return Err(fmt::Error); 125 | } 126 | s = &s[n as usize..]; 127 | } 128 | } 129 | 130 | self.pos = 0; 131 | Ok(()) 132 | } 133 | 134 | #[cfg(windows)] 135 | fn flush_console(&mut self, handle: HANDLE) -> fmt::Result { 136 | // Write `self.console_buf` to the console. 137 | let mut s = &self.console_buf[..self.console_pos]; 138 | while !s.is_empty() { 139 | unsafe { 140 | let mut n16 = 0; 141 | if WriteConsoleW( 142 | handle, 143 | s.as_ptr().cast(), 144 | min(s.len(), u32::MAX as usize) as u32, 145 | &mut n16, 146 | null_mut(), 147 | ) == 0 148 | { 149 | return Err(fmt::Error); 150 | } 151 | s = &s[n16 as usize..]; 152 | } 153 | } 154 | 155 | self.console_pos = 0; 156 | Ok(()) 157 | } 158 | } 159 | 160 | impl Drop for Writer { 161 | fn drop(&mut self) { 162 | #[cfg(feature = "errno")] 163 | #[cfg(unix)] 164 | errno::set_errno(self.saved_errno); 165 | 166 | #[cfg(windows)] 167 | unsafe { 168 | SetLastError(self.saved_error); 169 | } 170 | } 171 | } 172 | 173 | impl fmt::Write for Writer { 174 | fn write_str(&mut self, s: &str) -> fmt::Result { 175 | // On Windows, to write Unicode to the console, we need to use some 176 | // form of `WriteConsole` instead of `WriteFile`. 177 | #[cfg(windows)] 178 | { 179 | let stderr = unsafe { GetStdHandle(STD_ERROR_HANDLE) }; 180 | if unsafe { BorrowedHandle::borrow_raw(stderr as _) }.is_terminal() { 181 | // If the stream switched on us, just fail. 182 | if self.pos != 0 { 183 | return Err(fmt::Error); 184 | } 185 | 186 | // Transcode `s` to UTF-16 and write it to the console. 187 | for c in s.chars() { 188 | if self.console_buf.len() - self.console_pos < 2 { 189 | self.flush_console(stderr)?; 190 | } 191 | self.console_pos += c 192 | .encode_utf16(&mut self.console_buf[self.console_pos..]) 193 | .len(); 194 | } 195 | return Ok(()); 196 | } 197 | 198 | // If the stream switched on us, just fail. 199 | if self.console_pos != 0 { 200 | return Err(fmt::Error); 201 | } 202 | } 203 | 204 | let mut bytes = s.as_bytes(); 205 | while !bytes.is_empty() { 206 | let mut sink = &mut self.buf[self.pos..]; 207 | if sink.is_empty() { 208 | self.flush_buf()?; 209 | sink = &mut self.buf; 210 | } 211 | 212 | let len = min(sink.len(), bytes.len()); 213 | let (now, later) = bytes.split_at(len); 214 | sink[..len].copy_from_slice(now); 215 | 216 | self.pos += len; 217 | bytes = later; 218 | } 219 | Ok(()) 220 | } 221 | } 222 | 223 | #[doc(hidden)] 224 | pub fn _eprint(args: fmt::Arguments<'_>) { 225 | let mut writer = Writer::new(); 226 | writer.write_fmt(args).unwrap(); 227 | writer.flush(); 228 | } 229 | 230 | #[doc(hidden)] 231 | pub fn _eprintln(args: fmt::Arguments<'_>) { 232 | let mut writer = Writer::new(); 233 | writer.write_fmt(args).unwrap(); 234 | writer.write_fmt(format_args!("\n")).unwrap(); 235 | writer.flush(); 236 | } 237 | 238 | #[doc(hidden)] 239 | pub struct _Dbg(Writer); 240 | 241 | #[doc(hidden)] 242 | pub fn _dbg_start() -> _Dbg { 243 | _Dbg(Writer::new()) 244 | } 245 | 246 | #[doc(hidden)] 247 | pub fn _dbg_write(dbg: &mut _Dbg, file: &str, line: u32, name: &str, args: fmt::Arguments<'_>) { 248 | writeln!(&mut dbg.0, "[{}:{}] {} = {}", file, line, name, args).unwrap(); 249 | } 250 | 251 | #[doc(hidden)] 252 | pub fn _dbg_finish(mut dbg: _Dbg) { 253 | dbg.0.flush(); 254 | } 255 | 256 | /// Prints to the standard error. 257 | /// 258 | /// Similar to [`std::eprint`], except it: 259 | /// - Writes atomically, up to the greatest length supported on the platform. 260 | /// - Doesn't use locks (in userspace). 261 | /// - Preserve libc's `errno` and Windows' last-error code value. 262 | /// 263 | /// This allows it to be used to debug allocators, multi-threaded code, 264 | /// synchronization routines, startup code, and more. 265 | #[macro_export] 266 | macro_rules! eprint { 267 | ($($arg:tt)*) => { 268 | $crate::_eprint(core::format_args!($($arg)*)) 269 | }; 270 | } 271 | 272 | /// Prints to the standard error, with a newline. 273 | /// 274 | /// Similar to [`std::eprintln`], except it: 275 | /// - Writes atomically, up to the greatest length supported on the platform. 276 | /// - Doesn't use locks (in userspace). 277 | /// - Preserve libc's `errno` and Windows' last-error code value. 278 | /// 279 | /// This allows it to be used to debug allocators, multi-threaded code, 280 | /// synchronization routines, startup code, and more. 281 | #[macro_export] 282 | macro_rules! eprintln { 283 | () => { 284 | $crate::eprint!("\n") 285 | }; 286 | ($($arg:tt)*) => { 287 | // TODO: Use `format_args_nl` when it's stabilized. 288 | $crate::_eprintln(core::format_args!($($arg)*)) 289 | }; 290 | } 291 | 292 | /// Prints and returns the value of a given expression for quick and dirty 293 | /// debugging. 294 | /// 295 | /// Similar to [`std::dbg`], except it: 296 | /// - Writes atomically, up to the greatest length supported on the platform. 297 | /// - Doesn't use locks (in userspace). 298 | /// - Preserve libc's `errno` and Windows' last-error code value. 299 | /// 300 | /// This allows it to be used to debug allocators, multi-threaded code, 301 | /// synchronization routines, startup code, and more. 302 | #[macro_export] 303 | macro_rules! dbg { 304 | () => { 305 | $crate::eprintln!("[{}:{}]", core::file!(), core::line!()) 306 | }; 307 | ($val:expr $(,)?) => { 308 | // Use the same `match` trick that `std` does. 309 | match $val { 310 | tmp => { 311 | $crate::eprintln!("[{}:{}] {} = {:#?}", 312 | core::file!(), core::line!(), core::stringify!($val), &tmp); 313 | tmp 314 | } 315 | } 316 | }; 317 | ($($val:expr),+ $(,)?) => { 318 | let mut dbg = $crate::_dbg_start(); 319 | 320 | // Use the same `match` trick that `std` does. 321 | ($(match $val { 322 | tmp => { 323 | $crate::_dbg_write( 324 | &mut dbg, 325 | core::file!(), 326 | core::line!(), 327 | core::stringify!($val), 328 | core::format_args!("{:#?}", &tmp), 329 | ); 330 | tmp 331 | } 332 | }),+); 333 | 334 | $crate::_dbg_finish(dbg); 335 | }; 336 | } 337 | -------------------------------------------------------------------------------- /src/log.rs: -------------------------------------------------------------------------------- 1 | //! An extremely minimal log implementation that prints everything to `stderr` 2 | //! and has no configuration. 3 | 4 | struct Log; 5 | 6 | impl log::Log for Log { 7 | fn enabled(&self, _metadata: &log::Metadata) -> bool { 8 | true 9 | } 10 | 11 | fn log(&self, record: &log::Record) { 12 | crate::eprintln!( 13 | "{}: {} - {}", 14 | record.metadata().target(), 15 | record.level(), 16 | record.args() 17 | ); 18 | } 19 | 20 | fn flush(&self) {} 21 | } 22 | 23 | pub fn init() { 24 | log::set_max_level(log::LevelFilter::Trace); 25 | log::set_logger(&Log).unwrap(); 26 | } 27 | --------------------------------------------------------------------------------