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UserspaceEmulator: Capture backtraces of malloc/free events

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This lets us show backtraces for each leaked mallocation in the leak
report at the end. :^)
This commit is contained in:
Andreas Kling 2020-07-16 17:14:58 +02:00
parent f6584bfc36
commit 441918be7e
4 changed files with 32 additions and 14 deletions
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9
DevTools/UserspaceEmulator/MallocTracer.cpp
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@ -45,7 +45,7 @@ void MallocTracer::target_did_malloc(Badge<SoftCPU>, FlatPtr address, size_t siz
existing_mallocation->freed = false;
return;
}
m_mallocations.append({ address, size });
m_mallocations.append({ address, size, false, Emulator::the().raw_backtrace(), Vector<FlatPtr>() });
}
void MallocTracer::target_did_free(Badge<SoftCPU>, FlatPtr address)
@ -60,8 +60,10 @@ void MallocTracer::target_did_free(Badge<SoftCPU>, FlatPtr address)
dbgprintf("==%d== \033[31;1mDouble free()\033[0m, %p\n", s_pid, address);
dbgprintf("==%d== Address %p has already been passed to free()\n", s_pid, address);
Emulator::the().dump_backtrace();
} else {
mallocation.freed = true;
mallocation.free_backtrace = Emulator::the().raw_backtrace();
}
mallocation.freed = true;
return;
}
}
@ -179,9 +181,10 @@ void MallocTracer::dump_leak_report()
++leaks_found;
dbgprintf("\n");
dbgprintf("==%d== \033[31;1mLeak\033[0m, %zu-byte allocation at address %p\n", s_pid, mallocation.size, mallocation.address);
Emulator::the().dump_backtrace(mallocation.malloc_backtrace);
}
dbgprintf("==%d== %zu leak(s) found\n", s_pid, leaks_found);
dbgprintf("==%d== \033[%d;1m%zu leak(s) found\033[0m\n", s_pid, leaks_found ? 31 : 32, leaks_found);
}
}