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GleeBug
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Fix a dumb bug when setting memory breakpoints

This commit is contained in:
Duncan Ogilvie 2018-11-21 16:58:24 +01:00
parent 2ee4dc0f83
commit 85846e4ed1
1 changed files with 8 additions and 2 deletions
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10
GleeBug/Debugger.Process.Breakpoint.cpp
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@ -225,6 +225,7 @@ namespace GleeBug
bool Process::SetNewPageProtection(ptr page, MemoryBreakpointData & data, MemoryType type)
{
DPRINTF();
//TODO: handle PAGE_NOACCESS and such correctly (since it cannot be combined with PAGE_GUARD)
auto found = memoryBreakpointPages.find(page);
@ -261,11 +262,14 @@ namespace GleeBug
data.NewProtect = permanentDep ? RemoveExecuteAccess(RemoveWriteAccess(data.OldProtect)) : data.OldProtect | PAGE_GUARD;
}
dprintf("SetNewPageProtection(%p, %X)\n", page, data.NewProtect);
return MemProtect(page, PAGE_SIZE, data.NewProtect);
}
bool Process::SetMemoryBreakpoint(ptr address, ptr size, MemoryType type, bool singleshoot)
{
DPRINTF();
dprintf("SetMemoryBreakpoint(%p, %p, %d, %d)\n", address, size, type, singleshoot);
//TODO: error reporting
//basic checks
@ -292,18 +296,20 @@ namespace GleeBug
MemoryBreakpointData data;
data.Type = uint32(type);
auto alignedAddress = PAGE_ALIGN(address);
for (auto page = alignedAddress; page < alignedAddress + BYTES_TO_PAGES(size); page += PAGE_SIZE)
for (auto page = alignedAddress; page < alignedAddress + ROUND_TO_PAGES(size); page += PAGE_SIZE)
{
MEMORY_BASIC_INFORMATION mbi;
if (!VirtualQueryEx(hProcess, LPCVOID(page), &mbi, sizeof(mbi)))
{
success = false;
dprintf("!VirtualQueryEx\n");
break;
}
data.OldProtect = mbi.Protect;
if (!SetNewPageProtection(page, data, type))
{
success = false;
dprintf("!SetNewPageProtection\n");
break;
}
tempData.addr = page;
@ -369,7 +375,7 @@ namespace GleeBug
//delete the memory breakpoint from the pages
bool success = true;
auto alignedAddress = PAGE_ALIGN(info.address);
for (auto page = alignedAddress; page < alignedAddress + BYTES_TO_PAGES(info.internal.memory.size); page += PAGE_SIZE)
for (auto page = alignedAddress; page < alignedAddress + ROUND_TO_PAGES(info.internal.memory.size); page += PAGE_SIZE)
{
auto foundData = memoryBreakpointPages.find(page);
if (foundData == memoryBreakpointPages.end())