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#include <string.h>
#include "common.h"
#include "tizenasanenv.h"
extern "C" int dprintf(int fd, const char *format, ...);
extern "C" long write(int fd, const void *buf, unsigned long count);
template <typename Type, int STACK_SIZE>
class StaticStack {
// We don't create constructor because
// this class is used in a zeroed memory area
public:
void push(Type addr)
{
_ASSERTE(m_pos < STACK_SIZE);
m_data[m_pos++] = addr;
}
void pop()
{
_ASSERTE(m_pos > 0);
--m_pos;
}
Type top()
{
_ASSERTE(m_pos > 0);
return m_data[m_pos - 1];
}
bool empty()
{
return m_pos == 0;
}
private:
int m_pos;
Type m_data[STACK_SIZE];
};
#include <pshpack1.h>
struct AuxiliaryCalls {
LPVOID target;
void (*pushAddr)(LPVOID addr);
LPVOID (*popAddr)();
};
extern "C" void __sanitizer_disable_interceptors();
extern "C" void __sanitizer_enable_interceptors();
extern LPVOID tizenASanWrapper;
extern UINT32 tizenASanWrapperSize;
extern UINT32 tizenASanWrapperEntryOffset;
static __thread StaticStack<LPVOID, 128> s_retaddrStack;
static __thread int s_enableCounter;
char* itoa(int i, char b[]){
char const digit[] = "0123456789";
char* p = b;
if(i<0){
*p++ = '-';
i *= -1;
}
int shifter = i;
do{ //Move to where representation ends
++p;
shifter = shifter/10;
}while(shifter);
*p = '\0';
char *end = p;
do{ //Move back, inserting digits as u go
*--p = digit[i%10];
i = i/10;
}while(i);
return end;
}
void log_msg(const char *msg, int counter)
{
char buf[512];
char *p = buf;
memcpy(p, "#### ", 5); p += 5;
p = itoa(counter, p);
memcpy(p, " ", 1); p += 1;
memcpy(p, msg, strlen(msg) + 1); p += strlen(msg) + 1;
write(1, buf, (unsigned long)p - (unsigned long)buf - 1);
}
static void TryEnable()
{
log_msg("__ENABLE_PRE\n", s_enableCounter);
if (s_enableCounter == 0) {
{
char msg[] = "#### DO_ENABLE PRE\n";
write(1, msg, sizeof(msg) - 1);
}
__sanitizer_enable_interceptors();
{
char msg[] = "#### DO_ENABLE POST\n";
write(1, msg, sizeof(msg) - 1);
}
}
++s_enableCounter;
log_msg("__ENABLE_POST\n", s_enableCounter);
}
static void TryDisable()
{
log_msg("__DISABLE_PRE\n", s_enableCounter);
if (s_enableCounter == 1) {
{
char msg[] = "#### DO_DISABLE PRE\n";
write(1, msg, sizeof(msg) - 1);
}
__sanitizer_disable_interceptors();
{
char msg[] = "#### DO_DISABLE POST\n";
write(1, msg, sizeof(msg) - 1);
}
}
--s_enableCounter;
log_msg("__DISABLE_POST\n", s_enableCounter);
}
namespace TizenASanEnv {
void PushAndDisableASan(LPVOID addr)
{
{
char msg[] = "#### PushDisable\n";
write(1, msg, sizeof(msg) - 1);
}
TryDisable();
s_retaddrStack.push(addr);
}
LPVOID PopAndEnableASan()
{
{
char msg[] = "#### PopEnable\n";
write(1, msg, sizeof(msg) - 1);
}
LPVOID addr = s_retaddrStack.top();
s_retaddrStack.pop();
TryEnable();
return addr;
}
void PushAndEnableASan(LPVOID addr)
{
{
char msg[] = "#### PushEnable\n";
write(1, msg, sizeof(msg) - 1);
}
s_retaddrStack.push(addr);
TryEnable();
}
LPVOID PopAndDisableASan()
{
{
char msg[] = "#### PopDisable\n";
write(1, msg, sizeof(msg) - 1);
}
TryDisable();
LPVOID addr = s_retaddrStack.top();
s_retaddrStack.pop();
return addr;
}
LPVOID CreateWrapper(LPVOID target, void (*pushAddr)(LPVOID addr), LPVOID (*popAddr)())
{
dprintf(1, "#### CreateWrapper B\n");
_ASSERTE(tizenASanWrapperEntryOffset == sizeof(AuxiliaryCalls));
LPVOID wrapperSpace = (LPVOID)SystemDomain::GetGlobalLoaderAllocator()->GetExecutableHeap()->AllocMem(S_SIZE_T(tizenASanWrapperSize));
AuxiliaryCalls calls = {
.target = target,
.pushAddr = pushAddr,
.popAddr = popAddr,
};
// copy auxiliary calls
memcpy(wrapperSpace, &calls, sizeof(calls));
LPVOID entryPointer = (LPVOID)((UINT_PTR)wrapperSpace + tizenASanWrapperEntryOffset);
LPVOID wrapperEntryPointer = (LPVOID)((UINT_PTR)&tizenASanWrapper + tizenASanWrapperEntryOffset);
UINT32 wrapperCodeSize = tizenASanWrapperSize - tizenASanWrapperEntryOffset;
// copy executable code wrapper
memcpy(entryPointer, wrapperEntryPointer, wrapperCodeSize);
FlushInstructionCache(GetCurrentProcess(), wrapperSpace, tizenASanWrapperSize);
dprintf(1, "#### CreateWrapper E\n");
return entryPointer;
}
} // namespace TizenASanEnv
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