A, a[i] in the table refers to the type when they represent the first element of the respective array.② but when an array name is taken to the address character () or sizeof, it cannot be considered as the address of the first element, but rather as the whole . Please note the analysis of the and sizeof two columns in the table.
Information for the "Instance Analysis" array#include intMainintargcChar* argv[],Char*env[]) { inta[3][5] = {0}; intC; printf ("Information for array:a
the pointer pointing to the array backward by a step (and the step here is the number of array elements * The number of bytes occupied by the element type ).
# Include
Int main (void)
{
Int a [3] = {1, 2, 3 };
Int * p =;
Printf ("% 08x \ n", p );
Printf ("% 08x \ n", p );
Printf ("% 08x \ n", p + 1 );
Printf ("% 08x
Process Protection-CrossThreadFlags flag, threadschedflags
Principle:
1. Set the CrossThreadFlags flag of all threads of the process to Terminated or System.
Effect: the task manager, WSYSCheck, and ICESWORD cannot end the process ..
However, PCHUnter can end a protected process. However, PCHunter cannot end a protected thread by using a common method. It must end the thread by force ..
Code:
VOID SetThreadFlagToTerminatedByThreadID(ULONG dwThreadID){ULONG ulFlagOffset;NTSTATUS status = STATUS_
that takes the stored pointer variable p; sizeof (P) = 4;P: Represents the address stored by the pointer variable p; sizeof (P) = 4;A: Represents the address of the first element of the array; sizeof (a) =3*4=12;a: Represents the first address of the entire array, and sizeof (A) =4 (the value is 12 in vc++6.0, which I think is wrong because its type is an array pointer)Although the values of a and a are the same, the meaning of the expression is completely different, a means taking the address
Mon_backtraceThrough the above exploration, this problem is easy to solve. Call Debuginfo_eip in Mon_backtrace to get the file name, function name, and line number. Note that the Eip_fn_name field of the returned eipdebuginfo struct has a tail in addition to the function name, for example test_backtrace:F(0,25) , ": F (0,25)" needs to be removed and can be used printf("%.*s", length, string) to implement. The code is as follows:
int mon_backtrace(int argc, char **argv, struct Trapframe *tf
Principle:1. Set the thread crossthreadflags flag bit for all threads of the process to terminated or system.Effect: Task Manager, Wsyscheck,icesword cannot end the process.However, PCH unter can end a protected process. However, Pchunter cannot end a protected thread in a normal way, and must use the force end thread to end the thread. Code:VOID Setthreadflagtoterminatedbythreadid (ulong dwthreadid) {ulong Ulflagoffset; NTSTATUS status = status_unsuccessful; Pulong PFlag; Pethread Ethead; HANDL
, then (pp-pages) 1) Boot_alloc1 Static void*2 Boot_alloc (uint32_t N)3 {4 Static Char*nextfree;//virtual address of next byte of free memory5 Char*result;6 7 //Initialize Nextfree If This is the first time.8 //' End ' is a magic symbol automatically generated by the linker,9 //which points to the end of the kernel ' s BSS segment:Ten //The first virtual address, the linker did *not* assign One //to any kernel code or global variables. A if(!Nextfree) { -
access to the unalignedaddress, the execution of your program will end with a core. Therefore, the compiler will optimize the program during compilation to ensure that all data is stored in 'alignedAddress, which is the origin of memory alignment.
In the 'data alignment: straighten up and fly right' article, the author also concluded that: "If the accessed address is unaligned, using Large-granularity access memory may be slower than small-granularity access memory ".
4. Test code
struct Test{
);void operator delete [] (void * p);#endif
Implementation:
Extern uint _ heap_base; extern uint _ heap_limit; void * operator new (uint size) {debug_printf ("New Size: % d", size ); void * P = malloc (size); If (! P) debug_printf ("malloc failed! Size = % d ", size); else {debug_printf (" 0x % 08x ", P); // If the heap contains only 64 bytes, the report fails, the user is required to expand the heap space to avoid unexpected uint end = (uint) __ hea
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