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Object Introspection (OI) enables on-demand, hierarchical profiling of objects in arbitrary C/C++ programs with no recompilation.
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C++ 91%
Python 4.3%
CMake 2.8%
JavaScript 0.8%
C 0.4%
Other 0.7%
9e2b48d713
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Jake Hillion 9e2b48d713 jitlog: use a memfd and glog 
Summary:

Changes jitlog to use a memfd, an anonymous in memory file descriptor, rather
than a file on disk. Also clean up this fd at the end of an OID run rather than
leaving it in the hope it's valid next time.

A previous attempt to land this used a `char*` from the OID process space in
the remote target syscall. Somehow this works with our integration test target,
but not globally. Changed to use the previous behaviour of putting the syscall
arg in the empty text segment. In doing this I noticed that the text segment
wouldn't be initialised at this point on a fresh process, so we were copying
into effectively an uninitialised address. Move the jit log fd setup to after
the segment setup accordingly.

Test plan:
- CI
- Tested on an integration test target as before. Works.
- Created a new target that definitely doesn't have this string in (simple for
  loop). Failed before, works now.

Example:
```sh
$ OID_TEST_ARGS='-fjit-logging' stest OidIntegration.simple_struct
...
I1121 02:57:36.136890 500897 OIDebugger.cpp:269] Outputting JIT logs:
I1121 02:57:36.136896 500897 OIDebugger.cpp:272] JITLOG: SimpleStruct
@00007ffc639be180
I1121 02:57:36.136899 500897 OIDebugger.cpp:272] JITLOG: a @00007ffc639be180
I1121 02:57:36.136901 500897 OIDebugger.cpp:272] JITLOG: obj @00007ffc639be180
I1121 02:57:36.136904 500897 OIDebugger.cpp:272] JITLOG: b @00007ffc639be184
I1121 02:57:36.136905 500897 OIDebugger.cpp:272] JITLOG: obj @00007ffc639be184
I1121 02:57:36.136907 500897 OIDebugger.cpp:272] JITLOG: c @00007ffc639be188
I1121 02:57:36.136909 500897 OIDebugger.cpp:272] JITLOG: obj @00007ffc639be188
I1121 02:57:36.136911 500897 OIDebugger.cpp:278] Finished outputting JIT logs.
...
```
2023-11-21 12:00:13 +00:00
.circleci collapse TreeBuilderV2 features 2023-11-13 19:43:03 +00:00
.github Add website deployment script 2022-12-20 08:40:51 -08:00
cmake Enable compiler warnings globally 2023-05-23 10:36:42 +01:00
examples clang-format: set BinPackParameters=false 2023-04-24 11:28:22 +02:00
extern drgn: elfutils: Implement 64-bits offsets reconstruction for CU/TU Index Table 2023-07-06 17:09:41 +01:00
include/oi clang-format: disable bin packing 2023-11-13 18:19:53 +00:00
oi jitlog: use a memfd and glog 2023-11-21 12:00:13 +00:00
resources Compile Time OIL for OIL v2 2023-08-30 04:28:02 -07:00
test oil: add support for std::list 2023-11-15 14:14:02 +00:00
tools Make oitb actually log TB output (#415) 2023-11-20 13:24:28 +00:00
types tbv2: add dynamic context passed through all functions (#410) 2023-11-16 08:03:32 -08:00
website Use objectintrospection.org for the website 2023-09-21 20:59:46 +01:00
.clang-format clang-format: disable bin packing 2023-11-13 18:19:53 +00:00
.clang-tidy Initial commit 2022-12-19 06:37:51 -08:00
.editorconfig Initial commit 2022-12-19 06:37:51 -08:00
.git-blame-ignore-revs Initial commit 2022-12-19 06:37:51 -08:00
.gitignore Delete old files from test/ 2023-01-27 12:45:35 +00:00
.gitmodules drgn: add split dwarf support 2023-06-02 17:52:53 +02:00
CHANGELOG.md Initial commit 2022-12-19 06:37:51 -08:00
CMakeLists.txt add range-v3 library 2023-11-13 18:42:04 +00:00
CODE_OF_CONDUCT.md Initial commit 2022-12-19 06:37:51 -08:00
CONTRIBUTING.md Initial commit 2022-12-19 06:37:51 -08:00
dev.oid.toml Implement new container for F14ValueMap 2023-09-08 16:31:36 +02:00
LICENSE Initial commit 2022-12-19 06:37:51 -08:00
oss.oid.toml Initial commit 2022-12-19 06:37:51 -08:00
README.md Use objectintrospection.org for the website 2023-09-21 20:59:46 +01:00

README.md

object-introspection

Matrix Chat

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Object Introspection is a memory profiling technology for C++ objects. It provides the ability to dynamically instrument applications to capture the precise memory occupancy of entire object hierarchies including all containers and dynamic allocations. All this with no code modification or recompilation!

For more information on the technology and how to get started applying it to your applications please check out the Object Introspection website.

Join the Object Introspection community

See the CONTRIBUTING file for how to help out.

License

Object Introspection is licensed under the Apache 2.0 License.