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Kernel: Make KBufferBuilder::append() & friends return KResult

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This allows callers to react to a failed append (due to OOM.)
This commit is contained in:
Andreas Kling 2021-09-06 18:24:13 +02:00
parent b096e85777
commit 2065ced8f6
7 changed files with 63 additions and 42 deletions
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21
Kernel/GlobalProcessExposed.cpp
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@ -336,7 +336,8 @@ private:
ProcFSSelfProcessDirectory();
virtual bool acquire_link(KBufferBuilder& builder) override
{
builder.appendff("{}", Process::current().pid().value());
if (builder.appendff("{}", Process::current().pid().value()).is_error())
return false;
return true;
}
};
@ -559,8 +560,10 @@ private:
virtual bool output(KBufferBuilder& builder) override
{
InterruptDisabler disabler;
for (char ch : ConsoleDevice::the().logbuffer())
builder.append(ch);
for (char ch : ConsoleDevice::the().logbuffer()) {
if (builder.append(ch).is_error())
return false;
}
return true;
}
};
@ -664,7 +667,8 @@ private:
ProcFSUptime();
virtual bool output(KBufferBuilder& builder) override
{
builder.appendff("{}\n", TimeManagement::the().uptime_ms() / 1000);
if (builder.appendff("{}\n", TimeManagement::the().uptime_ms() / 1000).is_error())
return false;
return true;
}
};
@ -676,8 +680,10 @@ private:
ProcFSCommandLine();
virtual bool output(KBufferBuilder& builder) override
{
builder.append(kernel_command_line().string());
builder.append('\n');
if (builder.append(kernel_command_line().string()).is_error())
return false;
if (builder.append('\n').is_error())
return false;
return true;
}
};
@ -739,7 +745,8 @@ private:
{
if (!Process::current().is_superuser())
return false;
builder.append(String::number(kernel_load_base));
if (builder.append(String::number(kernel_load_base)).is_error())
return false;
return true;
}
};