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author | David Malcolm <dmalcolm@redhat.com> | 2022-07-28 17:21:28 -0400 |
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committer | David Malcolm <dmalcolm@redhat.com> | 2022-07-28 17:21:28 -0400 |
commit | 9cac6811cf0d6c1437426aaf13ea52c16c16fc80 (patch) | |
tree | ec52a8f94a5ffd28994b0159de9efe821a7451f5 /gcc/analyzer/region.h | |
parent | b8ce0c4361c267406d5eba1901e42fc5942dc775 (diff) | |
download | gcc-9cac6811cf0d6c1437426aaf13ea52c16c16fc80.zip gcc-9cac6811cf0d6c1437426aaf13ea52c16c16fc80.tar.gz gcc-9cac6811cf0d6c1437426aaf13ea52c16c16fc80.tar.bz2 |
analyzer: expand the comment in region.h
gcc/analyzer/ChangeLog:
* region.h: Add notes to the comment describing the region
class hierarchy.
Signed-off-by: David Malcolm <dmalcolm@redhat.com>
Diffstat (limited to 'gcc/analyzer/region.h')
-rw-r--r-- | gcc/analyzer/region.h | 52 |
1 files changed, 31 insertions, 21 deletions
diff --git a/gcc/analyzer/region.h b/gcc/analyzer/region.h index 1067748..a5b3029 100644 --- a/gcc/analyzer/region.h +++ b/gcc/analyzer/region.h @@ -72,27 +72,37 @@ enum region_kind region space_region - frame_region (RK_FRAME) - globals_region (RK_GLOBALS) - code_region (RK_CODE) - stack_region (RK_STACK) - heap_region (RK_HEAP) - root_region (RK_ROOT) - function_region (RK_FUNCTION) - label_region (RK_LABEL) - symbolic_region (RK_SYMBOLIC) - decl_region (RK_DECL), - field_region (RK_FIELD) - element_region (RK_ELEMENT) - offset_region (RK_OFFSET) - sized_region (RK_SIZED) - cast_region (RK_CAST) - heap_allocated_region (RK_HEAP_ALLOCATED) - alloca_region (RK_ALLOCA) - string_region (RK_STRING) - bit_range_region (RK_BIT_RANGE) - var_arg_region (RK_VAR_ARG) - unknown_region (RK_UNKNOWN). */ + frame_region (RK_FRAME): a function frame on the stack + globals_region (RK_GLOBALS): holds globals variables (data and bss) + code_region (RK_CODE): represents the code segment, containing functions + stack_region (RK_STACK): a stack, containing all stack frames + heap_region (RK_HEAP): the heap, containing heap_allocated_regions + root_region (RK_ROOT): the top-level region + function_region (RK_FUNCTION): the code for a particular function + label_region (RK_LABEL): a particular label within a function + symbolic_region (RK_SYMBOLIC): dereferencing a symbolic pointer + decl_region (RK_DECL): the memory occupied by a particular global, local, + or SSA name + field_region (RK_FIELD): the memory occupied by a field within a struct + or union + element_region (RK_ELEMENT): an element within an array + offset_region (RK_OFFSET): a byte-offset within another region, for + handling pointer arithmetic as a region + sized_region (RK_SIZED): a subregion of symbolic size (in bytes) + within its parent + cast_region (RK_CAST): a region that views another region using a + different type + heap_allocated_region (RK_HEAP_ALLOCATED): an untyped region dynamically + allocated on the heap via + "malloc" or similar + alloca_region (RK_ALLOCA): an untyped region dynamically allocated on the + stack via "alloca" + string_region (RK_STRING): a region for a STRING_CST + bit_range_region (RK_BIT_RANGE): a region for a specific range of bits + within another region + var_arg_region (RK_VAR_ARG): a region for the N-th vararg within a + frame_region for a variadic call + unknown_region (RK_UNKNOWN): for handling unimplemented tree codes. */ /* Abstract base class for representing ways of accessing chunks of memory. |