Gdb

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#include <stdio.h>

int main(int argc, char *argv[]) {
    printf("Hello world\n");
}

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gcc -o main -g main.c 

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gdb main      // gdb programname -p [pid]

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(gdb) b main  // set breakpoint
(gdb) layout src // gui
(gdb) p  // print p/x hex
(gdb) i b // list all breakpoints, you can list other info

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┌─test.c───────────────────────────────────────────────────┐
│   3           int main(int argc, char *argv[]) {         │
│B+>4               printf("Hello world\n");               │
│   5           }                                          │
└──────────────────────────────────────────────────────────┘
process 31551 In: main             L4    PC: 0x555555555144
(gdb) r
Starting program: /home/junxxx/Workspace/the_c_language/test


Breakpoint 1, main (argc=1, argv=0x7fffffffe338)
    at test.c:4
(gdb)