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Improve JIT profiling on Linux

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Add JIT object dumping functionality.
Add source for objdump interception utility.
This commit is contained in:
Nekotekina 2022-01-23 15:22:00 +03:00
parent 14951d8713
commit 11ee1f3eb2
4 changed files with 230 additions and 18 deletions
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42
Utilities/JIT.cpp
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@ -24,6 +24,37 @@ void jit_announce(uptr func, usz size, std::string_view name)
return;
}
if (!name.empty())
{
// If directory ASMJIT doesn't exist, nothing will be written
static const fs::file s_asm = []()
{
fs::remove_all(fs::get_cache_dir() + "/ASMJIT/", false);
return fs::file(fmt::format("%s/ASMJIT/.objects", fs::get_cache_dir()), fs::rewrite + fs::append);
}();
if (s_asm)
{
// Dump object: addr + size + bytes
s_asm.write(fmt::format("%s%s%s",
std::string_view(reinterpret_cast<char*>(&func), 8),
std::string_view(reinterpret_cast<char*>(&size), 8),
std::string_view(reinterpret_cast<char*>(func), size)));
}
if (s_asm && name[0] != '_')
{
// Save some objects separately
fs::file dump(fmt::format("%s/ASMJIT/%s", fs::get_cache_dir(), name), fs::rewrite);
if (dump)
{
dump.write(reinterpret_cast<uchar*>(func), size);
}
}
}
#ifdef __linux__
static const fs::file s_map(fmt::format("/tmp/perf-%d.map", getpid()), fs::rewrite + fs::append);
@ -146,17 +177,6 @@ void* jit_runtime_base::_add(asmjit::CodeHolder* code) noexcept
}
}
if (!dump_name.empty())
{
// If directory ASMJIT doesn't exist, nothing will be written
fs::file dump(fmt::format("%s/ASMJIT/%s", fs::get_cache_dir(), dump_name), fs::rewrite);
if (dump)
{
dump.write(p, codeSize);
}
}
return p;
}