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@kybr kybr/output.txt Secret
Created Jun 25, 2019

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⏿ c++11 recompile-a-function.cpp -ltcc ; and ./a.out
need 127 bytes.
relocating to 7fcefd403b90
foo(0) = 0
foo(1) = 1
foo(2) = 2
foo(3) = 3
foo(4) = 4
foo(5) = 5
foo(6) = 6
foo(7) = 7
foo(8) = 8
foo(9) = 9
<string>: error: 'foo' defined twice
Assertion failed: (-1 != tcc_compile_string(instance, "char foo(int t) { return t; }")), function main, file recompile-a-function.cpp, line 24.
#include <iostream>
using std::cout;
using std::endl;
#include "libtcc.h"
int main(int argc, char* argv[]) {
TCCState* instance = tcc_new();
tcc_set_output_type(instance, TCC_OUTPUT_MEMORY);
assert(-1 != tcc_compile_string(instance, "char foo(int t) { return t; }"));
int size;
assert(-1 != (size = tcc_relocate(instance, NULL)));
char* memory = new char[size];
printf("need %d bytes.\n", size);
printf("relocating to %llx\n", (unsigned long long)memory);
assert(-1 != tcc_relocate(instance, (void*)memory));
// tcc_delete(instance); // uncomment this line to crash on macOS
//
// deleting the tcc instance here on macOS leads to a crash later,
// then foo is called.
//
char (*foo)(int) = (char (*)(int))tcc_get_symbol(instance, "foo");
for (int t = 0; t < 10; t++) {
printf("foo(%d) = %d\n", foo(t), t);
}
// even after a relocate, we may not recompile foo
// <string>: error: 'foo' defined twice
assert(-1 != tcc_compile_string(instance, "char foo(int t) { return t; }"));
tcc_delete(instance);
return 0;
}
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