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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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6
LibC/mman.cpp
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@ -16,4 +16,10 @@ int munmap(void* addr, size_t size)
__RETURN_WITH_ERRNO(rc, rc, -1);
}
int set_mmap_name(void* addr, size_t size, const char* name)
{
int rc = Syscall::invoke(Syscall::SetMmapName, (dword)addr, (dword)size, (dword)name);
__RETURN_WITH_ERRNO(rc, rc, -1);
}
}

1
LibC/mman.h
View file

@ -6,5 +6,6 @@ extern "C" {
void* mmap(void*, size_t);
int munmap(void*, size_t);
int set_mmap_name(void*, size_t, const char*);
}

7
LibC/stdlib.cpp
View file

@ -1,5 +1,6 @@
#include "stdlib.h"
#include "mman.h"
#include "stdio.h"
#include <Kernel/Syscall.h>
#include <AK/Assertions.h>
@ -12,6 +13,12 @@ void* malloc(size_t size)
*crashme = 0;
}
void* ptr = mmap(nullptr, 4096);
if (ptr) {
int rc = set_mmap_name(ptr, 4096, "malloc");
if (rc < 0) {
perror("set_mmap_name failed");
}
}
return ptr;
}