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gdbstub: Use type alias for breakpoint maps

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Rather than having to type out the full std::map type signature, we can
just use a straightforward alias. While we're at it, rename
GetBreakpointList to GetBreakpointMap, which makes the name more
accurate. We can also get rid of unnecessary u64 static_casts, since
VAddr is an alias for a u64.
This commit is contained in:
Lioncash 2018-08-05 16:11:29 -04:00 committed by fearlessTobi
parent 80f1ffd8dc
commit 91559bfdfe
1 changed files with 44 additions and 38 deletions
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82
src/core/gdbstub/gdbstub.cpp
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@ -153,9 +153,10 @@ struct Breakpoint {
std::array<u8, 4> inst; std::array<u8, 4> inst;
}; };
std::map<u32, Breakpoint> breakpoints_execute; using BreakpointMap = std::map<VAddr, Breakpoint>;
std::map<u32, Breakpoint> breakpoints_read; BreakpointMap breakpoints_execute;
std::map<u32, Breakpoint> breakpoints_write; BreakpointMap breakpoints_read;
BreakpointMap breakpoints_write;
} // Anonymous namespace } // Anonymous namespace
static Kernel::Thread* FindThreadById(int id) { static Kernel::Thread* FindThreadById(int id) {
@ -375,11 +376,11 @@ static u8 CalculateChecksum(const u8* buffer, size_t length) {
} }
/** /**
* Get the list of breakpoints for a given breakpoint type. * Get the map of breakpoints for a given breakpoint type.
* *
* @param type Type of breakpoint list. * @param type Type of breakpoint map.
*/ */
static std::map<u32, Breakpoint>& GetBreakpointList(BreakpointType type) { static BreakpointMap& GetBreakpointMap(BreakpointType type) {
switch (type) { switch (type) {
case BreakpointType::Execute: case BreakpointType::Execute:
return breakpoints_execute; return breakpoints_execute;
@ -399,21 +400,23 @@ static std::map<u32, Breakpoint>& GetBreakpointList(BreakpointType type) {
* @param addr Address of breakpoint. * @param addr Address of breakpoint.
*/ */
static void RemoveBreakpoint(BreakpointType type, VAddr addr) { static void RemoveBreakpoint(BreakpointType type, VAddr addr) {
std::map<u32, Breakpoint>& p = GetBreakpointList(type); BreakpointMap& p = GetBreakpointMap(type);
auto bp = p.find(addr); const auto bp = p.find(addr);
if (bp != p.end()) { if (bp == p.end()) {
LOG_DEBUG(Debug_GDBStub, "gdb: removed a breakpoint: {:08x} bytes at {:08x} of type {}\n", return;
bp->second.len, bp->second.addr, static_cast<int>(type));
Memory::WriteBlock(bp->second.addr, bp->second.inst.data(), bp->second.inst.size());
Core::CPU().ClearInstructionCache();
p.erase(addr);
} }
LOG_DEBUG(Debug_GDBStub, "gdb: removed a breakpoint: {:08x} bytes at {:08x} of type {}",
bp->second.len, bp->second.addr, static_cast<int>(type));
Memory::WriteBlock(bp->second.addr, bp->second.inst.data(), bp->second.inst.size());
Core::CPU().ClearInstructionCache();
p.erase(addr);
} }
BreakpointAddress GetNextBreakpointFromAddress(VAddr addr, BreakpointType type) { BreakpointAddress GetNextBreakpointFromAddress(VAddr addr, BreakpointType type) {
std::map<u32, Breakpoint>& p = GetBreakpointList(type); const BreakpointMap& p = GetBreakpointMap(type);
auto next_breakpoint = p.lower_bound(addr); const auto next_breakpoint = p.lower_bound(addr);
BreakpointAddress breakpoint; BreakpointAddress breakpoint;
if (next_breakpoint != p.end()) { if (next_breakpoint != p.end()) {
@ -432,30 +435,33 @@ bool CheckBreakpoint(VAddr addr, BreakpointType type) {
return false; return false;
} }
std::map<u32, Breakpoint>& p = GetBreakpointList(type); const BreakpointMap& p = GetBreakpointMap(type);
const auto bp = p.find(addr);
auto bp = p.find(addr); if (bp == p.end()) {
if (bp != p.end()) { return false;
u32 len = bp->second.len; }
// IDA Pro defaults to 4-byte breakpoints for all non-hardware breakpoints u32 len = bp->second.len;
// no matter if it's a 4-byte or 2-byte instruction. When you execute a
// Thumb instruction with a 4-byte breakpoint set, it will set a breakpoint on
// two instructions instead of the single instruction you placed the breakpoint
// on. So, as a way to make sure that execution breakpoints are only breaking
// on the instruction that was specified, set the length of an execution
// breakpoint to 1. This should be fine since the CPU should never begin executing
// an instruction anywhere except the beginning of the instruction.
if (type == BreakpointType::Execute) {
len = 1;
}
if (bp->second.active && (addr >= bp->second.addr && addr < bp->second.addr + len)) { // IDA Pro defaults to 4-byte breakpoints for all non-hardware breakpoints
LOG_DEBUG(Debug_GDBStub, // no matter if it's a 4-byte or 2-byte instruction. When you execute a
"Found breakpoint type {} @ {:08x}, range: {:08x} - {:08x} ({} bytes)\n", // Thumb instruction with a 4-byte breakpoint set, it will set a breakpoint on
static_cast<int>(type), addr, bp->second.addr, bp->second.addr + len, len); // two instructions instead of the single instruction you placed the breakpoint
return true; // on. So, as a way to make sure that execution breakpoints are only breaking
} // on the instruction that was specified, set the length of an execution
// breakpoint to 1. This should be fine since the CPU should never begin executing
// an instruction anywhere except the beginning of the instruction.
if (type == BreakpointType::Execute) {
len = 1;
}
if (bp->second.active && (addr >= bp->second.addr && addr < bp->second.addr + len)) {
LOG_DEBUG(Debug_GDBStub,
"Found breakpoint type {} @ {:08x}, range: {:08x}"
" - {:08x} ({:x} bytes)",
static_cast<int>(type), addr, bp->second.addr, bp->second.addr + len, len);
return true;
} }
return false; return false;
@ -897,7 +903,7 @@ static void Continue() {
* @param len Length of breakpoint. * @param len Length of breakpoint.
*/ */
static bool CommitBreakpoint(BreakpointType type, VAddr addr, u32 len) { static bool CommitBreakpoint(BreakpointType type, VAddr addr, u32 len) {
std::map<u32, Breakpoint>& p = GetBreakpointList(type); BreakpointMap& p = GetBreakpointMap(type);
Breakpoint breakpoint; Breakpoint breakpoint;
breakpoint.active = true; breakpoint.active = true;