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Diffstat (limited to 'doc/developer-notes.md')
| -rw-r--r-- | doc/developer-notes.md | 95 |
1 files changed, 71 insertions, 24 deletions
diff --git a/doc/developer-notes.md b/doc/developer-notes.md index c3a63b3523..1888897856 100644 --- a/doc/developer-notes.md +++ b/doc/developer-notes.md @@ -12,6 +12,7 @@ Developer Notes - [Generating Documentation](#generating-documentation) - [Development tips and tricks](#development-tips-and-tricks) - [Compiling for debugging](#compiling-for-debugging) + - [Show sources in debugging](#show-sources-in-debugging) - [Compiling for gprof profiling](#compiling-for-gprof-profiling) - [`debug.log`](#debuglog) - [Signet, testnet, and regtest modes](#signet-testnet-and-regtest-modes) @@ -88,7 +89,11 @@ code. separate words (snake_case). - Class member variables have a `m_` prefix. - Global variables have a `g_` prefix. - - Compile-time constant names are all uppercase, and use `_` to separate words. + - Constant names are all uppercase, and use `_` to separate words. + - Enumerator constants may be `snake_case`, `PascalCase` or `ALL_CAPS`. + This is a more tolerant policy than the [C++ Core + Guidelines](https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#Renum-caps), + which recommend using `snake_case`. Please use what seems appropriate. - Class names, function names, and method names are UpperCamelCase (PascalCase). Do not prefix class names with `C`. - Test suite naming convention: The Boost test suite in file @@ -249,6 +254,35 @@ Development tips and tricks Run configure with `--enable-debug` to add additional compiler flags that produce better debugging builds. +### Show sources in debugging + +If you have ccache enabled, absolute paths are stripped from debug information +with the -fdebug-prefix-map and -fmacro-prefix-map options (if supported by the +compiler). This might break source file detection in case you move binaries +after compilation, debug from the directory other than the project root or use +an IDE that only supports absolute paths for debugging. + +There are a few possible fixes: + +1. Configure source file mapping. + +For `gdb` create or append to `.gdbinit` file: +``` +set substitute-path ./src /path/to/project/root/src +``` + +For `lldb` create or append to `.lldbinit` file: +``` +settings set target.source-map ./src /path/to/project/root/src +``` + +2. Add a symlink to the `./src` directory: +``` +ln -s /path/to/project/root/src src +``` + +3. Use `debugedit` to modify debug information in the binary. + ### Compiling for gprof profiling Run configure with the `--enable-gprof` option, then make. @@ -345,7 +379,7 @@ make cov Profiling is a good way to get a precise idea of where time is being spent in code. One tool for doing profiling on Linux platforms is called -[`perf`](http://www.brendangregg.com/perf.html), and has been integrated into +[`perf`](https://www.brendangregg.com/perf.html), and has been integrated into the functional test framework. Perf can observe a running process and sample (at some frequency) where its execution is. @@ -669,19 +703,19 @@ Foo(vec); ```cpp enum class Tabs { - INFO, - CONSOLE, - GRAPH, - PEERS + info, + console, + network_graph, + peers }; int GetInt(Tabs tab) { switch (tab) { - case Tabs::INFO: return 0; - case Tabs::CONSOLE: return 1; - case Tabs::GRAPH: return 2; - case Tabs::PEERS: return 3; + case Tabs::info: return 0; + case Tabs::console: return 1; + case Tabs::network_graph: return 2; + case Tabs::peers: return 3; } // no default case, so the compiler can warn about missing cases assert(false); } @@ -959,37 +993,44 @@ Subtrees Several parts of the repository are subtrees of software maintained elsewhere. -Some of these are maintained by active developers of Bitcoin Core, in which case changes should probably go -directly upstream without being PRed directly against the project. They will be merged back in the next -subtree merge. +Some of these are maintained by active developers of Bitcoin Core, in which case +changes should go directly upstream without being PRed directly against the project. +They will be merged back in the next subtree merge. -Others are external projects without a tight relationship with our project. Changes to these should also -be sent upstream, but bugfixes may also be prudent to PR against Bitcoin Core so that they can be integrated -quickly. Cosmetic changes should be purely taken upstream. +Others are external projects without a tight relationship with our project. Changes +to these should also be sent upstream, but bugfixes may also be prudent to PR against +a Bitcoin Core subtree, so that they can be integrated quickly. Cosmetic changes +should be taken upstream. -There is a tool in `test/lint/git-subtree-check.sh` ([instructions](../test/lint#git-subtree-checksh)) to check a subtree directory for consistency with -its upstream repository. +There is a tool in `test/lint/git-subtree-check.sh` ([instructions](../test/lint#git-subtree-checksh)) +to check a subtree directory for consistency with its upstream repository. Current subtrees include: - src/leveldb - - Upstream at https://github.com/google/leveldb ; Maintained by Google, but - open important PRs to Core to avoid delay. + - Subtree at https://github.com/bitcoin-core/leveldb-subtree ; maintained by Core contributors. + - Upstream at https://github.com/google/leveldb ; maintained by Google. Open + important PRs to the subtree to avoid delay. - **Note**: Follow the instructions in [Upgrading LevelDB](#upgrading-leveldb) when merging upstream changes to the LevelDB subtree. - src/crc32c - Used by leveldb for hardware acceleration of CRC32C checksums for data integrity. - - Upstream at https://github.com/google/crc32c ; Maintained by Google. + - Subtree at https://github.com/bitcoin-core/crc32c-subtree ; maintained by Core contributors. + - Upstream at https://github.com/google/crc32c ; maintained by Google. - src/secp256k1 - - Upstream at https://github.com/bitcoin-core/secp256k1/ ; actively maintained by Core contributors. + - Upstream at https://github.com/bitcoin-core/secp256k1/ ; maintained by Core contributors. - src/crypto/ctaes - - Upstream at https://github.com/bitcoin-core/ctaes ; actively maintained by Core contributors. + - Upstream at https://github.com/bitcoin-core/ctaes ; maintained by Core contributors. - src/univalue - - Upstream at https://github.com/bitcoin-core/univalue ; actively maintained by Core contributors, deviates from upstream https://github.com/jgarzik/univalue + - Subtree at https://github.com/bitcoin-core/univalue-subtree ; maintained by Core contributors. + - Deviates from upstream https://github.com/jgarzik/univalue. + +- src/minisketch + - Upstream at https://github.com/sipa/minisketch ; maintained by Core contributors. Upgrading LevelDB --------------------- @@ -1213,6 +1254,12 @@ A few guidelines for introducing and reviewing new RPC interfaces: - *Rationale*: User-facing consistency. +- Use `fs::path::u8string()` and `fs::u8path()` functions when converting path + to JSON strings, not `fs::PathToString` and `fs::PathFromString` + + - *Rationale*: JSON strings are Unicode strings, not byte strings, and + RFC8259 requires JSON to be encoded as UTF-8. + Internal interface guidelines ----------------------------- |