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functrace: Log syscalls
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af338a34c0
commit
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@ -32,6 +32,7 @@
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#include <AK/NonnullOwnPtr.h>
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#include <AK/StringBuilder.h>
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#include <AK/kmalloc.h>
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#include <Kernel/Syscall.h>
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#include <LibC/sys/arch/i386/regs.h>
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#include <LibCore/File.h>
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#include <LibDebug/DebugSession.h>
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@ -69,6 +70,23 @@ void print_function_call(String function_name, size_t depth)
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printf("=> %s\n", function_name.characters());
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}
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void print_syscall(PtraceRegisters& regs, size_t depth)
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{
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for (size_t i = 0; i < depth; ++i) {
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printf(" ");
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}
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const char* begin_color = "\033[34;1m";
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const char* end_color = "\033[0m";
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printf("=> %sSC_%s(0x%x, 0x%x, 0x%x)%s\n",
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begin_color,
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Syscall::to_string(
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(Syscall::Function)regs.eax),
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regs.edx,
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regs.ecx,
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regs.ebx,
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end_color);
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}
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NonnullOwnPtr<HashMap<void*, X86::Instruction>> instrument_code()
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{
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(void)demangle("foo"); // Required for linked with __cxa_demangle
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@ -134,18 +152,23 @@ int main(int argc, char** argv)
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return DebugSession::DebugDecision::Detach;
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}
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if (reason == DebugSession::DebugBreakReason::Syscall) {
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print_syscall(regs.value(), depth + 1);
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return DebugSession::DebugDecision::ContinueBreakAtSyscall;
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}
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if (new_function) {
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auto function_name = g_debug_session->elf().symbolicate(regs.value().eip);
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print_function_call(function_name, depth);
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new_function = false;
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return DebugSession::Continue;
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return DebugSession::ContinueBreakAtSyscall;
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}
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auto instruction = instrumented->get((void*)regs.value().eip).value();
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if (instruction.mnemonic() == "RET") {
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if (depth != 0)
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--depth;
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return DebugSession::Continue;
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return DebugSession::ContinueBreakAtSyscall;
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}
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// FIXME: we could miss some leaf functions that were called with a jump
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