update MRUBY_RUBY_VERSION to "4.0", MRUBY_RELEASE_MAJOR to 4,
MRUBY_RELEASE_MINOR to 0. update README.md references accordingly.
Co-authored-by: Claude <noreply@anthropic.com>
Inline L_DEF_METHOD body into OP_TDEF and OP_SDEF, making `tc`
(target class) a block-local variable in each case. This eliminates
the cross-case goto and frees one register at function scope.
`ch` (catch handler) cannot be scoped down because UNWIND_ENSURE
sets it before goto L_CATCH_TAGGED_BREAK where ch->target is
consumed (cross-goto flow requires function-scope visibility).
Co-authored-by: Claude <noreply@anthropic.com>
Amalgamated files include HAL gem source code selected at build time,
making them platform-specific. Document this as expected behavior.
Ref #6726.
Co-authored-by: Claude <noreply@anthropic.com>
Previously, explicit .o => presym.list_path dependencies were only
added for internal builds (mrbc sub-builds). When only a CrossBuild
is configured without an explicit Build.new, the implicit host build
is not internal, so its .o files had no ordering against presym header
generation. This caused "mruby/presym/id.h not found" errors when the
cross build's presym scanning triggered host compilation.
Fixes#6725.
Co-authored-by: Claude <noreply@anthropic.com>
On 32-bit platforms where alignof(int64_t) == 8 (ARM, MIPS, PowerPC,
RISC-V, MinGW), struct RBreak with MRB_USE_RBREAK_VALUE_UNION was 24
bytes (6 words) due to alignment padding before the union
mrb_value_union field. This exceeds the 5-word RVALUE limit, causing
a static assertion failure.
Replace union mrb_value_union with uint32_t[] storage (alignof == 4)
and use memcpy for value access. This gives exactly 20 bytes on all
32-bit platforms. Ref #6722
Co-authored-by: Claude <noreply@anthropic.com>
Organizes 22 doc files by audience (getting started, embedders,
contributors) so visitors can find the right document quickly.
Rendered automatically by GitHub when browsing the doc/ directory.
Co-authored-by: Claude <noreply@anthropic.com>
limitations.md: use consistent CRuby/mruby labels for remaining
entries that still had specific version strings.
language.md: add upfront summary of major CRuby differences so
porting developers see the key gotchas before reading the full doc.
capi.md: add table of contents for navigating the 800+ line
reference.
Co-authored-by: Claude <noreply@anthropic.com>
language.md: reorganize stdlib tables by class name instead of gem
name so users can quickly find "does mruby have Time/File/Set?"
capi.md: fix mrb_protect example (mrb->exc is cleared after protect,
so mrb_print_error does not work; show mrb_inspect instead); fix
fiber yield example to show correct usage as return value.
gc.md, compiler.md, vm.md: add "read this if" guidance paragraphs
to help developers decide whether they need each document.
Co-authored-by: Claude <noreply@anthropic.com>
Replace duplicated GC, compiler, and VM details with concise
summaries linking to gc.md, compiler.md, and vm.md.
Co-authored-by: Claude <noreply@anthropic.com>
Update CRuby/mruby version labels to generic names. Add sections for
refinements, Encoding, integer precision by boxing mode, and
ObjectSpace limitations.
Co-authored-by: Claude <noreply@anthropic.com>
Covers supported syntax, numeric types by boxing mode, core classes,
standard library gemboxes, and key differences from CRuby.
Co-authored-by: Claude <noreply@anthropic.com>
The old inspect_ary() function no longer exists. Replace with the
current mrb_ary_to_s() implementation from src/array.c.
Co-authored-by: Claude <noreply@anthropic.com>
Add sections on 64-bit inline float rotation encoding and 32-bit
RFloat heap allocation with char[] buffer for alignment safety.
Add comparison table of all three boxing modes and ABI note.
Co-authored-by: Claude <noreply@anthropic.com>
The power-of-10 normalization loop can leave f >= 10.0 when x87
extended precision (80-bit) produces different rounding than 64-bit
SSE2. This caused garbled output (e.g. "0.0,6.04*2000001e+19"
instead of "1.0e+20") because negative digit values were added to
'0'. Add a correction step after the loop, and clamp extracted
digits to [0,9] for robustness.
Co-authored-by: Claude <noreply@anthropic.com>
MRB_FL_OBJ_SHAPED uses bit 5 of flags, which on 32-bit conflicts
with Hash's ea_n_used field (bits 5-9). A Hash with entries would
falsely match MRB_OBJ_SHAPED_P, causing SEGV when its iv pointer
was misinterpreted as mrb_shaped_iv. Add tt == MRB_TT_OBJECT check
to the predicate.
Co-authored-by: Claude <noreply@anthropic.com>
The old name referred to "truncation" of float precision, which no
longer happens with rotation encoding. The new name describes the
actual behavior: disabling inline float encoding in word boxing.
The old name is kept as an obsolete alias for backward compatibility.
Co-authored-by: Claude <noreply@anthropic.com>
On 32-bit with MRB_WORDBOX_NO_FLOAT_TRUNCATE, RFloat stores a double
(8-byte alignment) but GC heap slots only guarantee 4-byte alignment.
Use char array + memcpy accessors to avoid misaligned access (SIGBUS
on MIPS, undefined behavior per C standard).
Co-authored-by: Claude <noreply@anthropic.com>
Heap-allocated RInteger with int64_t requires 8-byte alignment,
but GC heap slots on 32-bit may not guarantee it, causing SIGBUS
on architectures like MIPS. MRB_NO_BOXING is still allowed since
integers are stored inline in mrb_value (no heap RInteger).
Co-authored-by: Claude <noreply@anthropic.com>
Three new documents:
- doc/guides/getting-started.md: building, running, and embedding mruby
- doc/guides/capi.md: C API reference for values, classes, methods, etc.
- doc/internal/architecture.md: internal architecture for developers
Co-authored-by: Claude <noreply@anthropic.com>
Introduce "object shapes" (hidden classes) that share IV key
layouts across objects with the same instance variable assignment
order. This eliminates per-object key storage overhead.
Memory savings: ~22% heap reduction for object-heavy workloads
(e.g., 150k objects with 2-6 IVs). Per-object: 40->24 bytes
for 2 IVs. Objects exceeding 16 IVs or using
remove_instance_variable fall back to traditional iv_tbl.
Co-authored-by: Claude <noreply@anthropic.com>
Allow users to provide contiguous memory buffers for GC heap pages
via mrb_gc_add_region(). Region pages are carved from user-owned
buffers and never freed by the GC. This is the foundation for
bitmap GC on embedded targets with fragmented RAM.
Co-authored-by: Claude <noreply@anthropic.com>
Pack pool/syms/reps arrays into a single calloc with the irep struct,
reducing 4 allocations per irep to 1. Arrays are ordered by descending
alignment (pool/reps/syms) to eliminate inter-array padding.
Co-authored-by: Claude <noreply@anthropic.com>
GitHub sometimes returns transient 502 errors for valid URLs,
causing false positives in CI markdown link checks.
Co-authored-by: Claude <noreply@anthropic.com>
remove snprintf() call that requires <stdio.h>, which is unavailable
with MRB_NO_STDIO; use a static error message consistent with other
codegen_error() calls.
Fixes#6724.
Co-authored-by: Claude <noreply@anthropic.com>
- array.h: disable embedded arrays when MRB_INT64 makes mrb_value
too large to embed (fixes MRB_ARY_EMBED_LEN_MAX assertion)
- error.h: enable MRB_USE_RBREAK_VALUE_UNION for all 32-bit
no-boxing builds (MRB_USE_FLOAT32 is irrelevant without
word/nan boxing)
- gc.c: restrict RVALUE 8-byte alignment padding to
MRB_WORD_BOXING builds (fixes RVALUE size assertion)
- vm.c: guard direct ary->as.ary access with MRB_ARY_NO_EMBED
Fixes#6722.
Co-authored-by: Claude <noreply@anthropic.com>
Restrict .o -> presym.list_path dependency to internal builds only
(mrbc sub-build). Regular host/cross builds don't need this because
:all => :gensym ordering guarantees presym headers exist before .o
compilation, and compiler .d files track header changes.
The broad dependency caused full recompilation because Rake's
all_prerequisite_tasks checks transitive prerequisites: every .o
transitively depended on every .pi file through presym.list_path.
Fixes#6721.
Co-authored-by: Claude <noreply@anthropic.com>
Consolidate the duplicated print_no increment-and-wrap logic
from dbgcmd_print() and dbgcmd_info_local() into a single
next_print_no() function.
Co-authored-by: Claude <noreply@anthropic.com>
Flatten 4-level nested parsing of list command arguments into
a separate parse_file_line_spec() function.
Co-authored-by: Claude <noreply@anthropic.com>
Combine method and line breakpoint checks into a single
check_breakpoint_hit() helper, simplifying the DBG_RUN case.
Co-authored-by: Claude <noreply@anthropic.com>
mimaki