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Add sys$set_mmap_name and use it from LibC's malloc.

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It's nice to be able to identify mmap's in /proc/PID/vm.
This commit is contained in:
Andreas Kling 2018-10-28 09:57:22 +01:00
parent e904f193c1
commit 1d5afbdffc
7 changed files with 35 additions and 8 deletions
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25
Kernel/Task.cpp
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@ -18,6 +18,13 @@
//#define DEBUG_IO
//#define TASK_DEBUG
#define VALIDATE_USER_BUFFER(b, s) \
do { \
LinearAddress laddr((dword)(b)); \
if (!isValidAddressForUser(laddr) || !isValidAddressForUser(laddr.offset((s) - 1))) \
return -EFAULT; \
} while(0)
static const DWORD defaultStackSize = 16384;
Task* current;
@ -145,7 +152,6 @@ bool Task::deallocateRegion(Region& region)
InterruptDisabler disabler;
for (size_t i = 0; i < m_regions.size(); ++i) {
if (m_regions[i].ptr() == &region) {
// FIXME: This seems racy.
MM.unmapRegion(*this, region);
m_regions.remove(i);
return true;
@ -163,6 +169,16 @@ Task::Region* Task::regionFromRange(LinearAddress laddr, size_t size)
return nullptr;
}
int Task::sys$set_mmap_name(void* addr, size_t size, const char* name)
{
VALIDATE_USER_BUFFER(name, strlen(name));
auto* region = regionFromRange(LinearAddress((dword)addr), size);
if (!region)
return -EINVAL;
region->name = name;
return 0;
}
void* Task::sys$mmap(void* addr, size_t size)
{
// FIXME: Implement mapping at a client-preferred address.
@ -184,13 +200,6 @@ int Task::sys$munmap(void* addr, size_t size)
return 0;
}
#define VALIDATE_USER_BUFFER(b, s) \
do { \
LinearAddress laddr((dword)(b)); \
if (!isValidAddressForUser(laddr) || !isValidAddressForUser(laddr.offset((s) - 1))) \
return -EFAULT; \
} while(0)
int Task::sys$gethostname(char* buffer, size_t size)
{
VALIDATE_USER_BUFFER(buffer, size);