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functrace: Log syscalls

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Itamar 2020-04-15 21:10:51 +03:00 committed by Andreas Kling
parent af338a34c0
commit ef6dc61291
Notes: sideshowbarker 2024-07-19 07:33:28 +09:00 
Author: https://github.com/itamar8910
Commit: https://github.com/SerenityOS/serenity/commit/ef6dc612913
Pull-request: https://github.com/SerenityOS/serenity/pull/1813
1 changed files with 25 additions and 2 deletions
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27
Userland/functrace.cpp
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@ -32,6 +32,7 @@
#include <AK/NonnullOwnPtr.h>
#include <AK/StringBuilder.h>
#include <AK/kmalloc.h>
#include <Kernel/Syscall.h>
#include <LibC/sys/arch/i386/regs.h>
#include <LibCore/File.h>
#include <LibDebug/DebugSession.h>
@ -69,6 +70,23 @@ void print_function_call(String function_name, size_t depth)
printf("=> %s\n", function_name.characters());
}
void print_syscall(PtraceRegisters& regs, size_t depth)
{
for (size_t i = 0; i < depth; ++i) {
printf(" ");
}
const char* begin_color = "\033[34;1m";
const char* end_color = "\033[0m";
printf("=> %sSC_%s(0x%x, 0x%x, 0x%x)%s\n",
begin_color,
Syscall::to_string(
(Syscall::Function)regs.eax),
regs.edx,
regs.ecx,
regs.ebx,
end_color);
}
NonnullOwnPtr<HashMap<void*, X86::Instruction>> instrument_code()
{
(void)demangle("foo"); // Required for linked with __cxa_demangle
@ -134,18 +152,23 @@ int main(int argc, char** argv)
return DebugSession::DebugDecision::Detach;
}
if (reason == DebugSession::DebugBreakReason::Syscall) {
print_syscall(regs.value(), depth + 1);
return DebugSession::DebugDecision::ContinueBreakAtSyscall;
}
if (new_function) {
auto function_name = g_debug_session->elf().symbolicate(regs.value().eip);
print_function_call(function_name, depth);
new_function = false;
return DebugSession::Continue;
return DebugSession::ContinueBreakAtSyscall;
}
auto instruction = instrumented->get((void*)regs.value().eip).value();
if (instruction.mnemonic() == "RET") {
if (depth != 0)
--depth;
return DebugSession::Continue;
return DebugSession::ContinueBreakAtSyscall;
}
// FIXME: we could miss some leaf functions that were called with a jump