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Add basic zero faults.

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mmap() will now map uncommitted pages that get allocated and zeroed upon the
first access. I also made /proc/PID/vm show number of "committed" bytes in
each region. This is so cool! :^)
This commit is contained in:
Andreas Kling 2018-11-19 02:17:20 +01:00
parent e88f306d07
commit 629c5be10b
5 changed files with 42 additions and 7 deletions
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5
Kernel/ProcFileSystem.cpp
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@ -52,12 +52,13 @@ ByteBuffer procfs$pid_vm(Process& process)
auto stringImpl = StringImpl::createUninitialized(80 + process.regionCount() * 160 + 4096, buffer);
memset(buffer, 0, stringImpl->length());
char* ptr = buffer;
ptr += ksprintf(ptr, "BEGIN END SIZE NAME\n");
ptr += ksprintf(ptr, "BEGIN END SIZE COMMIT NAME\n");
for (auto& region : process.regions()) {
ptr += ksprintf(ptr, "%x -- %x %x %s\n",
ptr += ksprintf(ptr, "%x -- %x %x %x %s\n",
region->linearAddress.get(),
region->linearAddress.offset(region->size - 1).get(),
region->size,
region->committed(),
region->name.characters());
}
*ptr = '\0';