We now make use of the `__gxx_personality_v0` personality function to
handle the exception behavior.
For this reason, we now need to use a c++ compiler for linking the final
module after the translation process of a binary.
The contents of ELF dynamic tags is return either as a `str` or a
`bytes` depending on the versions of `pyelftools`.
This commit forces it to be a string to ensure compatibility with both
options.
* Handle SIGINT in children gracefully (`run` function).
* `run_translate`: return 0 on success.
* Move useful information about the `revng` installation from
`--version` to `--help`.
* Do not `execv` on external commands, otherwise the script will not
proceed.
* Print current directory-relative paths with `--verbose`.
We can currently successfully translate only dynamic binaries for
x86-64. Warn the user about this early on instead of failing in
`revng-merge-dynamic`.
This commit improves the output of `--help` and reduces the output of
`--version`. This commit, when calling `opt`, injects a `LD_PRELOAD`
for `libasan.so` in case a `librevng*.so` library uses it.
Due to `opt` loading multiple times the same library, we had to switch
to `LD_PRELOAD`. However, this is suboptimal. This commit goes back to
use the `-load` flag but excludes the libraries that are dependencies of
other libraries. This requires parsing the ELF but it's a more neat
solution.
In addition, several shortcuts for popular debugging tools (namely,
`gdb`, `valgrind`, `callgrind`, `heaptrack` and `perf`) have been added
to the root command.
Certain libraries linked to the input executable sometimes are not
required by the executable or other dynamic libraries. Therefore, the
`ld -l` switch ignores them.
This commit forces linking of all the required libraries, no matter
what, by wrapping the list of dynamic libraries in `-Wl,--no-as-needed`
and `-Wl,--as-needed`.
Sometimes dynamic libraries linked to executables do not end in
`.so`. Previously, we assumed that a version of the library ending in
`.so` was available on the system. However, this is not always the
case. In particular, Ubuntu 16.04 links `ls` to `libselinux.so.1` but no
`libselinux.so` file is available. This can lead to a linking failure.
This commit, correctly handles libraries whose name doesn't end in `.so`
by using the `-l:` linker option (e.g., `-l:libselinux.so.1`).
Pass to the Global Value Numbering pass the `enable-pre=false` and
`enable-load-pre=false` since they have been identified as a major
source of slowdown with very large binaries.
This commit does the following:
* It drops `revamb-dump` and transforms all the passes it featured in
passes that can be used directly from `opt`.
* It rename `revamb` to `revng-lift`.
* It introduces a script called `revng` which acts as a driver for the
whole rev.ng project. It replaces `translate`, `revcc`,
`csv-to-ld-options` and `revamb-dump`, since it offers an `opt`
subcommand which allows to easily invoke all the analysis passes.
* It makes the project a CMake package that can be easily used
externally.
* It allows to easily create libraries of analysis to use through
`revng-opt`.
Alessandro Di Federico