pkutaj

Year	Milestone
1957	FORTRAN — static allocation only, no heap
1960	LISP — first language with dynamic allocation + GC
1960	ALGOL 60 — introduced stack frames as a formal concept
1966	DRAM invented by Robert Dennard at IBM
1972	C — direct control via malloc()/free()

pkutaj

# include <stdio.h>

int* dangerous() {
  int x = 42;
  return &x;
}

int main() {
  int* p = dangerous();
  printf("print pointer of dangerious: %d\n", *p);

pkutaj

[cling]$ main()
print pointer of dangerious: 42
(int) 0

pkutaj

# include <stdio.h>

int* dangerous() {
  int x = 42;
  return &x;
}
void overwriter() {
  int y = 999;
}

pkutaj

[cling]$ main()
print the value of dangerous: 999
(int) 0

pkutaj

#include <stdio.h>

void z_func() {
  int x = 10;
  printf("&x = %p\n", (void*)&x);
}

void y_func() {
  int x = 10;
  printf("&x = %p\n", (void*)&x);

pkutaj

[cling]$ main()
&hx = 0x16d981f78 // main(); 6133653368
&x = 0x16d981f5c // x_func; 6133653340
&x = 0x16d981f3c // y_func; 6133653308
&x = 0x16d981f1c // z_func; 6133653276
(int) 0

pkutaj

[ins] In [7]: 0x16d981f78 - 0x16d981f5c
Out[7]: 28

pkutaj

[13714] 4211ab88-ad0a-497b-9281-de9db24959c8 <Error>: DynamicQueryHandler Code: 62. DB::Exception: Empty query. (SYNTAX_ERROR), Stack trace (when copying this message, always include the lines below):

pkutaj

Frame	Source file:line	Function signature	Address
0	./src/Common/Exception.cpp:133	DB::Exception::Exception(MessageMasked&&, int, bool)	0x165d072a
1	(not shown)	DB::Exception::Exception(String const&, int, String, bool)	0x15158c4e
2	./src/Common/Exception.h:130	DB::Exception::createDeprecated(String const&, int, bool)	0x169326df
3	./src/Parsers/parseQuery.cpp:411	DB::parseQueryAndMovePosition(IParser&, char const*&, ...)	0x1e76cbb2
4	./src/Parsers/parseQuery.cpp:424	DB::executeQueryImpl(char const*, char const*, ...)	0x1bce0e32
5	`./src/Interpreters/executeQuery.c