mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-27 18:52:11 -04:00
Matthew Stanley
ec4306fbb3
Framework work on codex/mmx6-support that makes Tomba build and play (title screen, 0 dispatch misses) and MMX6 boot through BIOS to its intro. Touches recompiler codegen (code_generator, function_analysis) and runtime CD-ROM/DMA/MDEC/GPU/SIO timing (cdrom, dma, mdec, gpu, psx_cycles, traps, fntrace, debug_server) + headers + runtime.cmake. Milestone snapshot for collapsing onto master. Build dir excluded. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
74 lines
2.8 KiB
C
74 lines
2.8 KiB
C
/* fntrace.h — always-on call ring for recomp psx_dispatch.
|
||
*
|
||
* Records every entry into psx_dispatch with the caller's argument
|
||
* registers and return address. Mirrors beetle_libretro.cpp's fntrace
|
||
* ring (same wire commands: fntrace_arm / fntrace_dump / fntrace_clear)
|
||
* so cross-process tools that already speak Beetle's protocol work
|
||
* unchanged against psx-runtime.
|
||
*
|
||
* Why "always-on" rather than arm-then-record: see CLAUDE.md global
|
||
* rule "Never time/attach for observability". The ring captures every
|
||
* dispatch from boot; arming only narrows what the dump command
|
||
* reports, never what is recorded. To investigate a window of
|
||
* interest, fntrace_dump it after the fact.
|
||
*
|
||
* Coverage: every psx_dispatch entry — both static-recompiled targets
|
||
* (ROM functions, shell-relocated functions) and dirty-RAM dispatches.
|
||
* dirty_ram_block_log overlaps with the dirty-RAM subset; this ring is
|
||
* the superset.
|
||
*/
|
||
#ifndef PSXRECOMP_FNTRACE_H
|
||
#define PSXRECOMP_FNTRACE_H
|
||
|
||
#include <stdint.h>
|
||
#include "cpu_state.h"
|
||
|
||
#ifdef __cplusplus
|
||
extern "C" {
|
||
#endif
|
||
|
||
/* 4M entries × 32 bytes = 128 MB. At ~580K dispatches/s peak (boot)
|
||
* that's ~7s; at ~10K/s during modal idle, ~400s. Sized for press-
|
||
* window retrospectives without per-second eviction. */
|
||
#define FNTRACE_RING_CAP (1u << 22)
|
||
|
||
typedef struct {
|
||
uint32_t frame; /* s_frame_count at dispatch */
|
||
uint32_t target; /* psx_dispatch addr argument (virtual) */
|
||
uint32_t ra; /* cpu->gpr[31] at dispatch — caller's return PC */
|
||
uint32_t a0; /* cpu->gpr[4] */
|
||
uint32_t a1; /* cpu->gpr[5] */
|
||
uint32_t a2; /* cpu->gpr[6] */
|
||
uint32_t a3; /* cpu->gpr[7] */
|
||
uint32_t s3; /* cpu->gpr[19] — callee-saved, useful for arg-passing chains */
|
||
} FntraceEntry;
|
||
|
||
extern FntraceEntry g_fntrace_ring[FNTRACE_RING_CAP];
|
||
extern uint64_t g_fntrace_seq; /* monotonic; index into ring = seq % CAP */
|
||
|
||
/* Hot path. Called from psx_dispatch on every entry. Inlinable. */
|
||
void fntrace_record(CPUState* cpu, uint32_t target);
|
||
/* Register the game's text range for one-shot game-start detection.
|
||
* First dispatch into [lo, hi) calls cdrom_notify_game_started(). */
|
||
void fntrace_set_game_range(uint32_t lo, uint32_t hi);
|
||
int fntrace_is_game_started(void);
|
||
|
||
/* Arm a target filter. arm_count == 0 means "record all" (default).
|
||
* When arm_count > 0, only dispatches whose target matches one of the
|
||
* armed entries are recorded. Use for noise reduction on a hot ring. */
|
||
#define FNTRACE_ARM_MAX 32
|
||
void fntrace_arm(uint32_t target); /* add to arm list, or 0 to clear */
|
||
void fntrace_arm_clear(void);
|
||
uint32_t fntrace_arm_count(void);
|
||
uint32_t fntrace_arm_get(uint32_t i);
|
||
void fntrace_arm_from_env(const char *env_name);
|
||
|
||
/* Reset ring (clears seq, leaves storage in place). */
|
||
void fntrace_clear(void);
|
||
|
||
#ifdef __cplusplus
|
||
}
|
||
#endif
|
||
|
||
#endif /* PSXRECOMP_FNTRACE_H */
|