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* Demangle constrained auto types (Dk <type-constraint>).Chris Mihelich2024-05-302-3/+23
| | | | | PiperOrigin-RevId: 638831461 Change-Id: Ie30ff381e7d74a40a689b52e66b2e8bb81e0fda6
* Parse <discriminator> more accurately.Chris Mihelich2024-05-302-2/+59
| | | | | PiperOrigin-RevId: 638778076 Change-Id: I97b9bab2d1b6f87d2f449777145f932949d61a38
* Demangle lambdas in class member functions' default arguments.Chris Mihelich2024-05-302-5/+59
| | | | | PiperOrigin-RevId: 638723132 Change-Id: I26ef4dbcb1b965a9d8c2f6092ccb51cf3575ba22
* Demangle unofficial <unresolved-qualifier-level> encodings like S0_IT_E.Chris Mihelich2024-05-292-2/+41
| | | | | PiperOrigin-RevId: 638430573 Change-Id: Ifc4d93bc4ea30951404546436f5397c8fb1bda57
* Demangle Clang's last-resort notation _SUBSTPACK_.Chris Mihelich2024-05-292-1/+39
| | | | | PiperOrigin-RevId: 638283381 Change-Id: Icdd46801f530bd4e8083777c14c78593fd6e111d
* Demangle C++ requires-expressions with parameters (rQ ... E).Chris Mihelich2024-05-292-0/+19
| | | | | PiperOrigin-RevId: 638266358 Change-Id: I8a750a53d5e98bc3ad3b6d36661789d97d6efb0a
* Demangle Clang's encoding of __attribute__((enable_if(condition, "message"))).Chris Mihelich2024-05-292-2/+62
| | | | | PiperOrigin-RevId: 638244694 Change-Id: I80393c6c00f1554057a915e0d71f88b7d899818c
* Demangle static_cast and friends.Chris Mihelich2024-05-292-0/+83
| | | | | PiperOrigin-RevId: 638232699 Change-Id: I134905927ba72eaa5eaf821bb5535942746a3672
* Demangle decltype(expr)::nested_type (NDT...E).Chris Mihelich2024-05-282-1/+18
| | | | | PiperOrigin-RevId: 638094845 Change-Id: I189ce357ccecbe6f341a311e405f9189bf6c0fee
* Demangle C++17 fold-expressions.Chris Mihelich2024-05-282-0/+84
| | | | | PiperOrigin-RevId: 638068943 Change-Id: I7ffe7df900ec4854d8712885d212854b31e79fea
* Demangle thread_local helper functions.Chris Mihelich2024-05-282-4/+33
| | | | | PiperOrigin-RevId: 638039514 Change-Id: I623d87e91ebe0a1166fee175151179b61ef54249
* Demangle lambdas with explicit template arguments (UlTy and similar forms).Chris Mihelich2024-05-282-1/+48
| | | | | PiperOrigin-RevId: 638019038 Change-Id: I96a87e4736677df9d44520e4510e089a27372765
* Demangle &-qualified function types.Chris Mihelich2024-05-282-8/+39
| | | | | PiperOrigin-RevId: 637972935 Change-Id: Ia684f7761b2a98a0d9d5ae096daba34e9140aa22
* Demangle valueless literals LDnE (nullptr) and LA<number>_<type>E ("foo").Chris Mihelich2024-05-282-4/+49
| | | | | PiperOrigin-RevId: 637958502 Change-Id: If81eba9729c16b5d5ac7187cf74738d8aaace367
* Correctly demangle the <unresolved-name> at the end of dt and pt (x.y, x->y).Chris Mihelich2024-05-282-1/+11
| | | | | PiperOrigin-RevId: 637934582 Change-Id: Ie89b4317b11adba058dd999800e514eff49d4d69
* Demangle C++ requires-expressions without parameters (rq ... E).Chris Mihelich2024-05-242-0/+135
| | | | | PiperOrigin-RevId: 637052089 Change-Id: I8e22c2479749c05d8ca5f9e8eeba480a93da2d18
* Recognize C++ vendor extended expressions (e.g., u9__is_same...E).Chris Mihelich2024-05-242-0/+20
| | | | | PiperOrigin-RevId: 636911360 Change-Id: I525e25b90b91712b95ab7499425de85610ff9115
* Demangle the C++ this pointer (fpT).Chris Mihelich2024-05-232-3/+27
| | | | | PiperOrigin-RevId: 636695970 Change-Id: I22d6f13271ab965563f1f575d9d7ba0ed1af466d
* Stop eating an extra E in ParseTemplateArg for some L<type><value>E literals.Chris Mihelich2024-05-232-4/+12
| | | | | PiperOrigin-RevId: 636682763 Change-Id: I9e5fd6827cb780c288ff5af54643ee4fbbaca6d5
* Demangle C++ direct-list-initialization (T{1, 2, 3}, tl ... E).Chris Mihelich2024-05-232-0/+93
| | | | | PiperOrigin-RevId: 636649618 Change-Id: I73a0be3defa438daf0e9db5c34c0e2feb0e52b69
* Demangle the C++ spaceship operator (ss, operator<=>).Chris Mihelich2024-05-232-0/+23
| | | | | PiperOrigin-RevId: 636634618 Change-Id: I812115d2a33dc71446a14deadc6af019eef6dfd7
* Demangle C++ sZ encodings (sizeof...(pack)).Chris Mihelich2024-05-232-17/+64
| | | | | PiperOrigin-RevId: 636615840 Change-Id: I34f584ea0c6603a0781e874d683b516de94c6928
* Demangle C++ so ... E encodings (typically array-to-pointer decay).Chris Mihelich2024-05-232-0/+50
| | | | | PiperOrigin-RevId: 636566755 Change-Id: I2c8c1f19a67a7a487dd2bbb46c17f9fb4e2b037c
* Recognize dyn-trait-type in Rust demangling.Chris Mihelich2024-05-232-1/+104
| | | | | PiperOrigin-RevId: 636563266 Change-Id: Id4ee907c30d7dac400f1f85776cc5f1fcb3e20b7
* Recognize fn-type and lifetimes in Rust demangling.Chris Mihelich2024-05-222-4/+124
| | | | | PiperOrigin-RevId: 636152885 Change-Id: If545903854ea39cc4b5c51c88cd555072d27d89e
* Recognize inherent-impl and trait-impl in Rust demangling.Chris Mihelich2024-05-212-2/+62
| | | | | PiperOrigin-RevId: 635955480 Change-Id: I9322b4e7732e252007f6ca6c9b0cefc25974c9f8
* Recognize const and array-type in Rust mangled names.Chris Mihelich2024-05-212-2/+119
| | | | | PiperOrigin-RevId: 635938476 Change-Id: I49cba8789452f13cfeb4a24203b3b46624aa7269
* Recognize generic arguments containing only types in Rust mangled names.Chris Mihelich2024-05-212-1/+62
| | | | | | | We follow the C++ demangler in not printing the arguments, just an empty <>. PiperOrigin-RevId: 635858791 Change-Id: I24903d4c5a1e2060e92ca950bf7a61647aee655f
* Give ReturnAddresses and N<uppercase> namespaces separate stacks for clarity.Chris Mihelich2024-05-151-26/+35
| | | | | PiperOrigin-RevId: 633974603 Change-Id: I7efd0f0fadf1803aa8eacb86a18366e9a8a07df0
* Demangle Rust backrefs.Chris Mihelich2024-05-142-6/+165
| | | | | PiperOrigin-RevId: 633738511 Change-Id: I3f895d5de1aec5b5b9666523a328f3a3b0344e59
* Use Nt for struct and trait names in Rust demangler test inputs.Chris Mihelich2024-05-141-43/+43
| | | | | | | The tests work either way, but this way the inputs are more realistic. PiperOrigin-RevId: 633606944 Change-Id: I6c0440f2fceb5b8d9d4aed5818c3171d3fce2fb8
* Demangle Rust's Y<type><path> production for passably simple <type>s.Chris Mihelich2024-05-133-6/+229
| | | | | PiperOrigin-RevId: 633229582 Change-Id: Ibda908d261b52b1af766304992edd77a5bdd56b5
* Recognize some simple Rust mangled names in Demangle.Chris Mihelich2024-05-068-2/+749
| | | | | PiperOrigin-RevId: 631018414 Change-Id: Ice8efa0af4cb1f72b5d62fbbea4cb12cbead8634
* Only check if the frame pointer is inside a signal stack with known boundsAbseil Team2024-03-281-0/+2
| | | | | | | | This function previously returned true whenever the signal stack had unknown bounds, that is obviously incorrect. PiperOrigin-RevId: 620084964 Change-Id: I3821730b45773300569b9cbdb7e72442ed109d04
* `demangle`: Parse template template and C++20 lambda template param ↵Dino Radakovic2024-02-152-2/+48
| | | | | | | | | substitutions These were described in https://github.com/itanium-cxx-abi/cxx-abi/pull/85 and implemented by LLVM. PiperOrigin-RevId: 607555558 Change-Id: I9991ac88c1fcf63b25b93d93977a83ca343cdb5d
* `demangle`: Parse optional single template argument for built-in typesDino Radakovic2024-02-132-6/+45
| | | | | | | The optional single template argument for built-in types is not documented in LLVM's comments that list the grammar, but it is [intentionally implemented](https://github.com/llvm/llvm-project/commit/4bc4d51c18d5c087dfbdad1753c84bba8dbf3be0). PiperOrigin-RevId: 606843797 Change-Id: Ib5ef1983812e9ea68a39fe64b87b6ad6ce81b93c
* `demangle`: Add complexity guard to `ParseQRequiresExpr`Dino Radakovic2024-02-131-0/+2
| | | | | | | | This function copies the parser's state onto the stack in order to perform backtracking. Adding a complexity guard will ensure that it fails gracefully, instead of contributing to excessive consumption of stack space. PiperOrigin-RevId: 606720511 Change-Id: I2f6f03e5f8bc4cc571a4159ecfc2af6f3e00fa68
* `demangle`: Parse `requires` clauses on template params, before function ↵Dino Radakovic2024-02-092-17/+59
| | | | | | | | | | | | | | | | return type For example, this covers the following: ``` template <typename T> requires std::integral<T> int foo(); ``` Refactor parsing of `Q <requires-clause expr>` into a single function that performs backtracking to avoid reimplementing `ParseTemplateArgs` in terms of nested if-else blocks. PiperOrigin-RevId: 605785418 Change-Id: I118998a75e050dcf46af125b613b690312fd3cbe
* `demangle`: Parse `requires` clauses on functionsDino Radakovic2024-02-092-8/+53
| | | | | | | These clauses show up in other places that end up mangled as parts of function signatures (e.g. on template struct params). We'll handle those in a follow-up. PiperOrigin-RevId: 605694497 Change-Id: I1bfe4c0cfaa739fdd24548b1547482410c92b5a7
* `demangle`: Parse C++20-compatible template param declarations, except those ↵Dino Radakovic2024-02-082-7/+97
| | | | | | | | | with `requires` expressions Support for `requires` expressions will be added in a follow-up. PiperOrigin-RevId: 605418370 Change-Id: I2c84cdf0c4599e36683b3c94dcbb173ab4fc3ee8
* `demangle`: Implement parsing for simplest constrained template argumentsDino Radakovic2024-02-072-0/+42
| | | | | | | | | | | | | | | | | C++20 introduced constraints, where concepts such as `std::integral` can be used to restrict template parameters: ``` template <std::integral T> int foo(T t); // Only accepts integral types. ``` Clang mangles these starting with a prefix `Tk`, followed by the concept name, which mangles as a type. For example, compare `foo` and `bar` here: https://godbolt.org/z/Kzbrrchde Note that this implementation doesn't cover the more complex case where the concept is templated too. See [llvm's implementation](https://github.com/llvm/llvm-project/commit/4b163e343cfa54c8d55c9da73c70d58f55ea9df2) and its tests for a thorough version. PiperOrigin-RevId: 604976260 Change-Id: Ic116c5f6f27c3f7714638bdee8de11dce871f0be
* Fix a typo.Abseil Team2024-02-041-1/+1
| | | | | PiperOrigin-RevId: 604094890 Change-Id: If5634a15c7ea7c8ef2cc9b6d09636ee7836946d2
* Always check if the new frame pointer is readable.Abseil Team2024-01-231-7/+8
| | | | | | | Terminate the stack trace if it isn't. PiperOrigin-RevId: 600839499 Change-Id: I5692fa6cb52c4c8061b4ac14d8fba70f7fbabc52
* Avoid a empty library build failure on Apple platformsDerek Mauro2024-01-031-0/+18
| | | | | | | | | | | | | | | | | | | | | https://github.com/abseil/abseil-cpp/issues/1465 reports that some CMake builds on Apply platforms issue ``` warning: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: archive library: libabsl_bad_any_cast_impl.a the table of contents is empty (no object file members in the library define global symbols) ``` Our CMake build handles this problem for header-only libraries by not building a library at all. For some libraries, for example our polyfills, the library is only conditionally empty. In these libraries, I added a single char variable on Apple platforms as a workaround. I have been able to reproduce the warnings reported in https://github.com/abseil/abseil-cpp/issues/1465, but they don't fail the build for me. I don't see them any more after this change. PiperOrigin-RevId: 595480705 Change-Id: Ie48637e84ebae2f2aea4e2de83b146f30f6a76b9
* AddressIsReadable: improve commentsFangrui Song2023-12-201-2/+4
| | | | | | | | | | | | | | | | | | | Linux kernel's rt_sigprocmask correctly handles an unaligned user address[1]. The original issue was for qemu-user, which seems long irrelevant. Tested locally on an AArch64 CPU and qemu-aarch64-static. The alignment operation actually serves another purpose: when addr resides in the last 7 bytes of a page (unaligned), check only the current page and not the next. Update the comment. [1]: kernel/signal.c `SYSCALL_DEFINE4(rt_sigprocmask` arch/arm64/include/asm/uaccess.h:raw_copy_from_user arch/arm64/lib/copy_template.S "alignment handled by the hardware" PiperOrigin-RevId: 592618320 Change-Id: Ifbd05aba42f46e36e710cca940570213036b3ce0
* Speed-up absl::Symbolize by ~6x via faster file reads.Abseil Team2023-11-151-44/+108
| | | | | | | | | | | | | | | | | | | | absl::Symbolize does tons of tiny reads. Speed this up by switching from lseek+read to a pread, and by reading more data than requested into a buffer. A faster absl::Symbolize will be helpful in tests and when printing stack traces on /threadz etc. Results for absl::Symbolize benchmark that exercises uncached behavior of absl::Symbolize: ``` name old time/op new time/op delta BM_Symbolize 16.4ms ±12% 2.6ms ± 0% -84.06% (p=0.001 n=5+9) ``` PiperOrigin-RevId: 582687566 Change-Id: I44caf189d81867f3fd8c050a3100a4b9a8e744d7
* Add explicit int -> uintptr_t conversion in stacktrace code for aarch64Abseil Team2023-11-081-1/+1
| | | | | PiperOrigin-RevId: 580515441 Change-Id: I64999b11f1d83d56ed3680cb2d41c8a1d5f389de
* Properly handle signal stacks and frame-size calculationsAbseil Team2023-11-071-17/+38
| | | | | | | | | | | | | We can determine the signal stack, so use that information to make better decisions about when to calculate the frame size and when not to. This fixes a several tests where the memory layout had the signal stack and main stack in position that confused some of the greater-than/less-than comparisons. Also cleanup certain types to avoid more casting than necessary. PiperOrigin-RevId: 580221819 Change-Id: I0365b03e7893741603dc66e6d36a069d0b7f5404
* Bazel: Support layering_check and parse_headersDerek Mauro2023-10-101-0/+10
| | | | | | | | | | | | | The layering_check feature ensures that rules that include a header explicitly depend on a rule that exports that header. Compiler support is required, and currently only Clang 16+ supports diagnoses layering_check failures. The parse_headers feature ensures headers are self-contained by compiling them with -fsyntax-only on supported compilers. PiperOrigin-RevId: 572350144 Change-Id: I37297f761566d686d9dd58d318979d688b7e36d1
* With sufficiently high-levels of optimization, this functionAbseil Team2023-10-041-0/+3
| | | | | | | | | and those that call it can be inlined sufficiently far to mess up high-level skip-counts. But this function assumes it is the bottommost frame, as in the comment below. PiperOrigin-RevId: 570790048 Change-Id: I4d354f9e79e13aaa6a8a62a9e0870fbeac075de6
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