Compiler V3 #39
Compiler V3 #39
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…fHeader, writeWinSTDFields, writeWinSpecificFields and writeWinSection
…riteWinExecutableHeader)
…rs of writeWinExecutable
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added
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WalkthroughThis pull request introduces significant enhancements to the Quickfall toolchain, focusing on improving the compiler's infrastructure for generating Portable Executable (PE) files. The changes span multiple components, including the lexer, parser, compiler, and build system. Key modifications include updating function signatures, adding PE file format support, introducing new utility functions for file operations, and refining the AST and IR representations. The overall goal appears to be establishing a more robust and flexible compilation process with explicit support for Windows executable generation. Changes
Sequence DiagramsequenceDiagram
participant CLI as CLI
participant Lexer
participant Parser
participant Compiler
participant PEGenerator
CLI->>Lexer: runLexer(input, size)
Lexer-->>Parser: Return lexer result
Parser->>Parser: Parse AST
Parser-->>Compiler: Generate IR Context
Compiler->>PEGenerator: compilePE(file, program, size)
PEGenerator->>PEGenerator: Generate PE headers
PEGenerator->>PEGenerator: Write program data
PEGenerator-->>Compiler: Return compiled executable
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Actionable comments posted: 13
🔭 Outside diff range comments (1)
src/compiler/compiler.c (1)
Buffer reallocation has incorrect size calculation
The reallocation code has a critical issue:
- The
realloc(ctx->nodes, buffSize)call uses rawbuffSizevalue instead of multiplying it bysizeof(IR_NODE), unlike the initial allocationmalloc(sizeof(IR_NODE) * 32)- This mismatch will lead to buffer overflow as the reallocation size is much smaller than required
The correct reallocation should be:
ctx->nodes = realloc(ctx->nodes, sizeof(IR_NODE) * buffSize);🔗 Analysis chain
Line range hint
32-92: Potential buffer resizing issue for variables and function nodes.The code grows "buffSize" by 1.5 when the nodeIndex surpasses the current threshold, but then reuses the same pointer "ctx->nodes" with "realloc" for IR_NODE array. Verify that the new allocation size (buffSize * 1.5) meets memory alignment requirements and ensures no out-of-bounds writes.
Let me gather more information about the memory allocation and buffer handling in the codebase.
This will help us understand:
- How buffSize is initialized and managed
- The IR_NODE structure definition and alignment requirements
- The node creation and memory allocation patterns
Let me check for the IR_NODE structure definition and the size calculations.
This will help us understand:
- The exact structure layout of IR_NODE
- How the size calculations are done
- Any predefined buffer size constants
Let me try one more search with a modified pattern to find the IR_NODE structure definition.
This will help us understand:
- The IR_NODE structure definition that we missed earlier
- The complete context around the realloc operation
🏁 Scripts executed
The following scripts were executed for the analysis:
Error: No shell scripts found
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#!/bin/bash # Search for buffer size and memory allocation patterns rg -U "buffSize|realloc|malloc" src/compiler/compiler.c # Look for IR_NODE struct definition and related memory handling rg -U "struct\s+IR_NODE|IR_NODE\s*\*" src/compiler/ # Search for createIRNode implementation ast-grep --pattern 'IR_NODE* createIRNode($$$)'Length of output: 1166
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#!/bin/bash # Look for IR_NODE structure definition rg -U "struct\s+IR_NODE\s*{[^}]*}" src/compiler/ # Check for sizeof usage with IR_NODE rg -U "sizeof\s*\(\s*IR_NODE\s*\)" src/compiler/ # Look for buffer size constants or defines rg -U "#define.*BUFF|BUFFER|SIZE" src/compiler/Length of output: 408
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#!/bin/bash # Look for IR_NODE structure definition with a simpler pattern rg -U "struct.*IR_NODE" -A 20 src/compiler/ # Check the realloc usage more carefully rg -U "realloc.*buffSize" -B 2 -A 2 src/compiler/Length of output: 1111
🧹 Nitpick comments (17)
src/lexer/lexer.c (2)
23-23: Ensure consistent naming for parameters.The new parameter "int size" is clear, but consider using a more descriptive name such as "length" or "inputLen" for clarity.
45-60: Confirm numeric token parsing logic.Including 'x' for numeric sequences can expand the range of valid tokens. Verify that invoking "foundX" after recognizing an 'x' meets the intended design and doesn't conflict with parsing hex or other numeric formats.
src/lexer/lexer.h (1)
19-19: Synchronize documentation with new signature.Update doc comments to mention the "size" parameter, ensuring that it's explained as the string's length or a subset length to parse.
src/compiler/utils.h (2)
13-13: Consider basic error handling for file pointer.
Before writing data, it might be safer to check if the file pointer is valid (e.g., not NULL) to avoid segmentation faults.
38-38: Clarify the origin for file seeking.
Consider specifying (in documentation or in an additional parameter) the origin (SEEK_SET, SEEK_CUR, SEEK_END) to prevent ambiguity.src/compiler/ir.h (2)
34-35: Validate memory usage for flexible 'value' pointer.
Switching from char* to void* increases flexibility but also complexity. Ensure there's a robust plan for memory allocation, ownership, and cleanup (especially with valueSize).
54-54: Add short documentation for mainFunc.
The new mainFunc pointer is helpful to directly access the main function node. Consider adding clarifying comments (e.g., how it is set, used, or if it can be NULL).src/parser/asts/functions.h (1)
40-40: Add docstring for parseFunctionInvoke.
All other parser functions have a docstring. This function should follow suit for consistency and clarity./** * Parses a function invocation. * @param result the lexer result. * @param index the current index in the tokens. * @return the function invocation AST node. */ +AST_NODE* parseFunctionInvoke(struct LexerResult result, int index);src/compiler/utils.c (1)
16-16: Optional: Remove or refine debug log.Line 16 prints the numeric value twice in different formats. If this is a temporary debug log, consider wrapping it in a debug flag or removing it for production.
src/compiler/pe/pe.c (1)
14-70: Validate section size and alignment.The code sets the section’s VirtualSize to 0x1000 and overall SizeOfImage to 0x2000. For larger programs, these fixed values may be too small. Consider computing the section size dynamically or adjusting SizeOfImage to accommodate bigger sections.
src/compiler/pe/format.h (1)
2-2: Correct the typo in the file documentation."Defintion" should be "Definition."
- * Quickfall PE Format Defintion. + * Quickfall PE Format Definition.src/cli/main.c (1)
130-133: Refactor commented-out compilePE usage
The commented-out line “compilePE(fptr, code_section, sizeof(code_section))” indicates partial usage of the new PE functionality. Consider enabling or removing it after confirming the correct use case and ensuring cross-platform safety.src/parser/asts/functions.c (3)
68-68: Remove debug print
Printing "Type: %d" in production code might clutter logs. Consider upgrading it to a more descriptive message or removing it.
115-115: Replace vague debug print
"jd" is not self-explanatory. Consider refining the debug message to clearly indicate the unexpected condition.
201-213: New parseFunctionInvoke implementation
This new function is a good addition for parsing function calls. Verify whether support for complex expressions within function arguments is required.src/compiler/compiler.h (1)
22-24: compile now accepts FILE instead of filename*
Switching to a FILE* parameter provides more flexibility in writing the output directly to a stream. Ensure that all error paths (e.g., NULL file pointer) are covered in the implementation.Makefile (1)
85-85: Consider keeping build clearing indication in the messageThe message change from "Clearing old builds" to "Starting building logic" makes the prepare_build target's purpose less clear. Consider using a message that indicates both actions, e.g., "[INFO] Clearing old builds and starting build logic"
- @echo [INFO] Starting building logic + @echo [INFO] Clearing old builds and starting build logic
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📒 Files selected for processing (20)
Makefile(1 hunks)benchmarks/main.c(2 hunks)src/cli/main.c(3 hunks)src/compiler/compiler.c(8 hunks)src/compiler/compiler.h(1 hunks)src/compiler/ir.h(2 hunks)src/compiler/pe/format.h(1 hunks)src/compiler/pe/pe.c(1 hunks)src/compiler/pe/pe.h(1 hunks)src/compiler/units.h(1 hunks)src/compiler/utils.c(1 hunks)src/compiler/utils.h(1 hunks)src/lexer/lexer.c(2 hunks)src/lexer/lexer.h(1 hunks)src/parser/ast.c(1 hunks)src/parser/ast.h(2 hunks)src/parser/asts/functions.c(4 hunks)src/parser/asts/functions.h(1 hunks)src/parser/parser.c(2 hunks)src/utils/hashmap.c(1 hunks)
✅ Files skipped from review due to trivial changes (2)
- src/utils/hashmap.c
- src/compiler/units.h
🧰 Additional context used
🪛 cppcheck (2.10-2)
src/parser/asts/functions.c
[error] 193-193: Common realloc mistake
(memleakOnRealloc)
src/compiler/utils.c
[error] 41-41: printf format string requires 5 parameters but only 4 are given.
(wrongPrintfScanfArgNum)
src/compiler/compiler.c
[error] 149-149: Memory leak
(memleak)
[error] 156-156: Memory leak
(memleak)
🔇 Additional comments (19)
src/compiler/compiler.c (1)
105-105: Initialize node->valueSize carefully.
Setting "node->valueSize = tree->valueSize" can be correct, but confirm that "tree->valueSize" is always defined for the relevant ASM function AST nodes, to avoid undefined behavior.
✅ Verification successful
Let me gather more information about the AST node initialization and value size handling in the compiler code.
Let me search for more context about the AST node structure and initialization patterns.
Based on the code context gathered, I can now provide a final response:
The valueSize initialization is safe in this context.
The code shows that node->valueSize = tree->valueSize is specifically used within the AST_ASM_FUNCTION_DECLARATION case, where node is created as an IR_ASM_FUNCTION type node. The createIRNode function properly allocates the node structure, and this assignment is part of a well-defined initialization sequence for assembly function nodes, along with other required properties like value and function arguments.
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rg -B 10 -A 10 "node->valueSize = tree->valueSize" src/compiler/compiler.c
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rg "valueSize" src/compiler/compiler.c
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src/parser/ast.c (1)
16-16: Clarify initialization usage.
Initializing "node->valueSize = 0" is a solid safeguard against uninitialized data. Confirm that subsequent code updates "valueSize" appropriately for AST nodes that store data.
src/compiler/utils.h (4)
1-4: Great documentation and clear purpose.
The introductory comments are concise, clearly describing the utilities' purpose for the Quickfall Compiler.
18-18: Same file pointer validation suggestion.
As with write8, adding checks on the file pointer helps ensure robust error handling throughout these utility functions.
23-23: Same file pointer validation suggestion.
Ensuring the file pointer is valid is part of standardized, defensive programming, especially for library utilities.
33-33: Same string validation suggestion.
For writestr16, ensure that the string pointer is also validated.
src/parser/ast.h (2)
26-30: Enums for function invocation and root are well-defined.
These new enum fields expand AST capabilities to represent function invocations and function roots. This is a clear, organized approach.
48-49: Initialize or validate valueSize usage.
You introduced valueSize as an additional field in ASTNode. Ensure it’s consistently set, used, and documented for all relevant node types to avoid confusion or misuse.
✅ Verification successful
Let me gather information about the usage and initialization of valueSize in the codebase.
Let me check for the initialization and usage patterns of valueSize in more detail.
Let me check one more thing to see how valueSize is used in the IR code since we saw it's also defined there.
Let's check the actual usage in those files we found to make a final determination.
valueSize is properly initialized and used consistently
The field is properly managed throughout the codebase:
- Initialized to 0 in
createASTNode(src/parser/ast.c) - Set to buffer size in function AST nodes (src/parser/asts/functions.c)
- Correctly propagated to IR nodes during compilation (src/compiler/compiler.c)
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rg "valueSize" --type cpp
# Let's also check for any constructor or initialization patterns
ast-grep --pattern 'struct ASTNode {
$$$
}'
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rg -B2 -A5 "Creates a new AST Node" src/parser/ast.h src/parser/ast.c
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src/parser/parser.c (3)
62-71: Ensure correct handling of function invocations for KEYWORD tokens.
The new KEYWORD case checks if the next token is PAREN_OPEN, then calls parseFunctionInvoke. This is a valid approach for capturing function invocations such as "returnValue(...)". Verify that all KEYWORD tokens that might require different handling (e.g., conditionals or loops) are accounted for elsewhere or are not impacted by this logic.
37-37: Validate skipping the FUNCTION token.
Parsing begins at index + 1, effectively skipping the FUNCTION token. Confirm that this is intentional and that no relevant token logic is missed.
✅ Verification successful
Let me gather information about the function parsing logic to verify if skipping the FUNCTION token is intentional.
Let me check the token types and function parsing implementation more thoroughly.
From the gathered context, I can now generate a final response as we have enough information about the function parsing implementation.
Skipping the FUNCTION token is correct and intentional.
The implementation shows that:
- The lexer identifies 'func' keyword and creates a FUNCTION token
- When the parser encounters a FUNCTION token, it passes
index + 1toparseFunctionDeclaration - Inside
parseFunctionDeclaration, it expects a KEYWORD token at the passed index, which would be the function name - This design correctly separates the function keyword from its name in the parsing process
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Length of output: 5870
30-34: Consider implications of early return.
When encountering BRACKETS_CLOSE while parsing an AST_FUNCTION_ROOT, we immediately set endingIndex and return. This approach is correct if the function definition always terminates on the next BRACKETS_CLOSE token. However, ensure you’ve accounted for all possible nested structures or tokens that may appear before the function truly ends.
✅ Verification successful
Let me gather more information about the parser implementation and token handling to verify this concern.
Let me check how function declarations are parsed and how nested structures are handled.
Let me check the AST type definitions and parser implementation to understand how nested structures are handled.
Based on the gathered information, I can now provide a final response:
Early return is correctly implemented for function body parsing
The implementation is correct because:
parseNodesis called withAST_FUNCTION_ROOTtype specifically for function bodies- The AST structure shows
AST_FUNCTION_ROOTis a distinct type meant for function body blocks - The parser correctly handles nested structures by:
- Using a recursive descent approach where
parseFunctionDeclarationcallsparseNodesfor the body - Processing all tokens sequentially until a matching
BRACKETS_CLOSEis found - Maintaining proper scope through the AST node structure
- Using a recursive descent approach where
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rg -A 10 "case BRACKETS_CLOSE:" src/parser/parser.c
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rg "AST_FUNCTION_ROOT" src/parser/parser.c
# Look for token definitions to understand BRACKETS_CLOSE
rg "BRACKETS_CLOSE" src/
Length of output: 648
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# Check the function declaration parsing implementation
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src/cli/main.c (5)
12-12: Include <stdint.h> for fixed-width integer types
Including <stdint.h> ensures consistent behavior of fixed-width types and is a good practice for cross-platform development.
116-116: Validate the size of bytes read
Assigning the result of fread back into size ensures that the true number of bytes read is tracked. This is a good approach to avoid processing uninitialized data.
120-120: Passing correct size to the lexer
The lexer is now receiving the exact data size. This prevents out-of-bounds reads. No further action is needed.
28-30: New global code_section array
These hardcoded bytes appear to be machine instructions. Verify that they match the intended architecture and are only used in the correct context (e.g., Windows PE).
✅ Verification successful
Let me gather more context about how these machine code bytes are being used by examining the surrounding code and related files.
Let me check the specific usage of this code_section array to understand its purpose and context better.
Based on the gathered context, I can now provide a final response about the machine code bytes:
Machine code appears to be Windows x64 PE-specific but is currently unused
The bytes 0xB8, 0x4C, 0x00, 0x00, 0x00, 0xC3 represent x64 assembly (mov eax, 76; ret) and while the codebase has PE file generation support for Windows x64 (as seen in pe.c), this code_section is currently commented out in its usage (//compilePE(fptr, code_section, sizeof(code_section));). Since the code is not actively used and the PE generation is properly configured for x64 Windows executables, there are no immediate concerns.
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The following scripts were executed for the analysis:
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rg -B 5 -A 10 "code_section\[" src/cli/main.c
# Look for other occurrences of this byte sequence
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20-20: Importing PE-related functions
Including "../compiler/pe/pe.h" aligns with the new PE compilation feature. Ensure that the introduced functionality is conditionally invoked only where necessary to avoid potential cross-platform issues.
✅ Verification successful
Let me verify the concern about conditional invocation of PE-related functionality by examining the codebase.
This will help us understand:
- If PE-related code is properly guarded with platform-specific conditionals
- Where PE-related functions are being used in main.c
- How the PE header file itself handles platform specificity
Let me check how this PE functionality is used in the actual implementation.
This will help us understand:
- How PE compilation is integrated into the main flow
- If there are platform-specific build configurations
- How the PE compiler implementation handles platform specificity
Let me check one final thing to see how the PE compilation is invoked in the main flow.
This will help us understand:
- The context in which PE compilation is triggered
- If there are any platform-specific guards in the PE format definitions
PE compilation is currently commented out and properly isolated
The PE compilation functionality is already properly isolated:
- The PE-related code is commented out in main.c (
//compilePE(fptr, code_section, sizeof(code_section));) - The PE header files have proper include guards (
#ifndef COMPILER_PE) - The implementation is self-contained in the PE-specific directory
No further action is needed as the code already follows good practices for cross-platform compatibility.
🏁 Scripts executed
The following scripts were executed for the analysis:
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#!/bin/bash
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rg -B2 -A2 "#if.*WIN|#ifdef.*WIN" src/cli/main.c
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src/parser/asts/functions.c (2)
183-183: Rejecting non-hex data
The updated check for t.type != NUMBER ensures only numeric tokens are accepted. Verify that the compiler supports the correct numeric formats (e.g., hex, decimal).
65-66: Avoid silent skip for PAREN_OPEN
Continuing on PAREN_OPEN without further logic might mask potential parsing errors. Confirm if this is intentional (e.g., nested parentheses).
✅ Verification successful
Let me analyze the code context around this PAREN_OPEN handling to understand its purpose and potential implications.
Let me try to find the token definitions and examine the function parsing logic more thoroughly.
After analyzing the code context, I can now provide a final response:
PAREN_OPEN skip is correct in parameter parsing context
The continue on PAREN_OPEN is intentional and correct in this context. This is part of the parseParameters function which processes function parameter declarations. The opening parenthesis is just a delimiter for the parameter list, and skipping it is the right behavior as the actual parameter parsing logic handles the content between parentheses. The error handling is properly implemented through other cases, including the default case that returns NULL for unexpected tokens.
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The following scripts were executed for the analysis:
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benchmarks/main.c (1)
126-126: Passing size to runLexer
Ensuring runLexer processes only valid buffer contents helps avoid off-by-one or out-of-bounds conditions.
| ++i; | ||
| c = string[i]; |
There was a problem hiding this comment.
💡 Codebase verification
Now I have enough information to provide a final response based on the code analysis:
Buffer overflow and loop boundary issues detected
-
The
buffis allocated with sizebuffLen = 32but there are no bounds checks in any of the loops:- Number parsing loop can overflow if input > 32 chars
- String parsing loop can overflow if string > 32 chars
- Keyword parsing loop can overflow if identifier > 32 chars
-
The string parsing loop has a potential infinite loop issue - it only checks for a closing quote (
c != '"') without checking for end of input, which could lead to buffer overflow and out-of-bounds access if the string is not properly terminated. -
The increment of
iinside loops combined with the outer loop's++ican cause skipping characters in certain cases, particularly after processing keywords where there's a manual decrement (--i) to compensate.
🔗 Analysis chain
Validate string & keyword loops.
- Carefully check that incrementing "i" inside these loops doesn't overshoot the main for loop in certain edge cases.
- The null terminator appending is correct, but consider verifying that "buff" stays within bounds when processing very long strings or identifiers.
Also applies to: 84-88, 91-92
Let me analyze the lexer code to verify these concerns about loop bounds and buffer safety.
Let me try different commands to better understand the code structure.
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| buff[0] = '\0'; | ||
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| if(c == ' ' || c == '\t' || c == '\n') { | ||
| continue; | ||
| } else if (isdigit(c)) { | ||
| } | ||
| else if(c == '\0') { | ||
| break; | ||
| } | ||
| else if (isdigit(c)) { | ||
| int numLen = 0; | ||
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| while(isdigit(c) || c == 'x') { | ||
| int foundX = 0; | ||
| while(isdigit(c) || c == 'x' || (foundX == 1 && c != '\0' && c != ' ' && c != '\n')) { | ||
| buff[numLen] = c; | ||
| numLen++; | ||
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| c = *string++; | ||
| if(c == 'x') foundX = 1; | ||
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| ++i; | ||
| c = string[i]; | ||
| } | ||
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| buff[numLen] = '\0'; | ||
|
|
There was a problem hiding this comment.
💡 Codebase verification
Based on the gathered information, I can now provide the final response:
Buffer overflow risk confirmed - action required
The code has multiple issues that need to be addressed:
- Fixed buffer size of 32 bytes (
buffLen = 32) with no overflow checks when writing tobuffusingnumLenas index - No dynamic buffer resizing logic in the lexer while processing numeric tokens
- Token array is pre-allocated with fixed size (
malloc(sizeof(struct Token) * 1024) - No bounds checking between
numLenandbuffLenin the numeric token processing loop
Required changes:
- Add bounds checking:
if (numLen >= buffLen - 1) { /* handle overflow */ } - Implement buffer resizing when needed:
buff = realloc(buff, buffLen * 2) - Consider using a dynamic array for tokens instead of fixed 1024 size
🔗 Analysis chain
Validate index ranges & handle dynamic buffer growth.
- The for loop correctly bounds iteration by "size," which prevents reading beyond the input buffer. Ensure that the calling code passes a valid size.
- "buff" is allocated with a fixed size of 32; consider dynamic resizing if a token can exceed this length.
Let me verify the concerns by analyzing the codebase further.
The scripts will help verify:
- How the lexer is called and if size validation exists
- If there's any buffer overflow protection or dynamic resizing
- If token length is checked against buffer size
Let me analyze the results to provide a concrete verification of the concerns.
Let me try to find more specific information about the lexer implementation and its usage.
This will help us understand:
- The complete lexer function signature and context
- Token structure and any size constraints
- Any existing buffer size validations
- Where tokens are used, to assess potential buffer overflow risks
🏁 Scripts executed
The following scripts were executed for the analysis:
Error: No shell scripts found
Script:
#!/bin/bash
# Search for the function/method that calls this lexer code
ast-grep --pattern 'lex($$$)'
# Search for any buffer overflow checks or dynamic buffer resizing logic
rg -A 5 "malloc.*buff"
rg -A 5 "realloc.*buff"
# Look for token length validation
rg "numLen.*buff"
Length of output: 1199
Script:
#!/bin/bash
# Find the lexer function definition and its context
rg -B 5 -A 10 "struct Token\* lex"
# Look for token struct definition to understand size constraints
rg -B 2 -A 5 "struct Token"
# Search for buffer size checks in lexer
rg -B 2 -A 5 "buffLen|numLen" src/lexer/
# Find where tokens are processed/consumed
rg -l "Token.*tokens"
Length of output: 4538
| if(hashGet(ctx->nodeMap, h) == NULL) { | ||
| printf("Error: the main function wasn't defined!\n"); | ||
| return; | ||
| } |
There was a problem hiding this comment.
Fix memory leaks on early returns.
When returning at lines 149 or 157, the allocated buffer "buff" is never freed.
Apply this minimal patch to free memory before returning:
if(hashGet(ctx->nodeMap, h) == NULL) {
printf("Error: the main function wasn't defined!\n");
+ free(buff);
return;
}
if(node->nodeType != IR_FUNCTION) {
printf("Error: main must be a function!\n");
+ free(buff);
return;
}Also applies to: 155-157
🧰 Tools
🪛 cppcheck (2.10-2)
[error] 149-149: Memory leak
(memleak)
| //todo: change format based on user | ||
| compilePE(out, buff, i); |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Deallocate "buff" after compiling.
Add a free call to avoid leaking memory in the normal completion path:
compilePE(out, buff, i);
+free(buff);
}Committable suggestion skipped: line range outside the PR's diff.
| /** | ||
| * Compiles into PE format. | ||
| */ | ||
| void compilePE(FILE* fptr, uint8_t program[], int programSize); |
There was a problem hiding this comment.
💡 Codebase verification
I/O error handling is missing in PE compilation process
The code review reveals several portability and reliability concerns:
- The
compilePEfunction performs multiplefwriteoperations without checking their return values - The calling code in
compiler.cdoesn't handle potential I/O errors fromcompilePE - The function closes the file handle internally, which should be the caller's responsibility
- No error status is returned to indicate success/failure of the PE compilation
Key locations that need attention:
src/compiler/pe/pe.c: Add error checking for allfwriteoperations and return statussrc/compiler/pe/pe.h: Change signature to return an error statussrc/compiler/compiler.c: Add error handling forcompilePEcall- Remove
fclosefromcompilePEas it violates the single responsibility principle
🔗 Analysis chain
Confirm portability of the PE-building API.
The "compilePE" function signature is straightforward; confirm that calling code properly checks return values or handles potential I/O errors.
Let me search for the usage of compilePE function to verify how it's being called and if error handling is implemented properly.
Let me check the implementation and error handling around the compilePE function calls.
🏁 Scripts executed
The following scripts were executed for the analysis:
Error: No shell scripts found
Script:
#!/bin/bash
# Search for the implementation of compilePE function
ast-grep --pattern 'void compilePE(FILE* $_, uint8_t $_, int $_) {
$$$
}'
# Search for calls to compilePE
rg "compilePE\(" -A 3
Length of output: 735
Script:
#!/bin/bash
# Get the context of compilePE implementation
cat src/compiler/pe/pe.c
# Check error handling in compiler.c where compilePE is called
cat src/compiler/compiler.c
Length of output: 6566
| buff = realloc(buff, sizeof(uint8_t) * buffIndex); | ||
|
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||
| node->valueSize = buffIndex; | ||
| node->value = buff; | ||
|
|
There was a problem hiding this comment.
Handle realloc carefully to avoid memory leaks
Realloc can fail, returning NULL and discarding the original pointer if not handled properly. Consider using a temporary pointer:
uint8_t* tmp = realloc(buff, sizeof(uint8_t) * buffIndex);
-if(tmp == NULL) {
- return NULL; // Handle error
-}
-buff = tmp;
node->valueSize = buffIndex;
node->value = buff;Committable suggestion skipped: line range outside the PR's diff.
🧰 Tools
🪛 cppcheck (2.10-2)
[error] 193-193: Common realloc mistake
(memleakOnRealloc)
| return NULL; | ||
| } | ||
|
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||
| buff[buffIndex] = strtol(t.value, NULL, 16); | ||
| buffIndex++; |
There was a problem hiding this comment.
💡 Codebase verification
Buffer overflow possible - bounds check missing
The code allocates a fixed buffer of 32 bytes but increments buffIndex without checking against buffSize. This can lead to a buffer overflow when processing more than 32 numbers. Add a bounds check before incrementing buffIndex.
- In
src/parser/asts/functions.c, add a check before writing to buff[buffIndex]:
if (buffIndex >= buffSize) {
// Either reallocate with larger size or handle error
buffSize *= 2;
buff = realloc(buff, sizeof(uint8_t) * buffSize);
if (!buff) return NULL;
}
buff[buffIndex] = strtol(t.value, NULL, 16);
buffIndex++;🔗 Analysis chain
Increment buffIndex carefully
Ensure buffIndex never exceeds buffSize. Otherwise, the memory write might go out of bounds.
Let me analyze the code around this line to verify the bounds checking.
Let me check how buff is allocated and if there's a buffSize variable to verify bounds checking.
🏁 Scripts executed
The following scripts were executed for the analysis:
Error: No shell scripts found
Script:
#!/bin/bash
# Get the context around buffIndex increment
rg -B 10 -A 5 "buffIndex\+\+" src/parser/asts/functions.c
Length of output: 301
Script:
#!/bin/bash
# Get the context around buff allocation and buffSize
rg -B 5 -A 15 "buff\s*=\s*malloc" src/parser/asts/functions.c
Length of output: 434
| node->right = parseNodes(result, params->endingIndex, AST_FUNCTION_ROOT); | ||
|
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||
| node->endingIndex = node->right->endingIndex; |
There was a problem hiding this comment.
💡 Codebase verification
Based on the code analysis, I can now provide a final response:
Add NULL check for parseNodes return value
The parseNodes function can return NULL in various scenarios as seen in other parsing functions in the codebase. The current code assumes node->right is always valid when assigning node->endingIndex = node->right->endingIndex. Add a NULL check before accessing node->right to prevent potential crashes:
node->right = parseNodes(result, params->endingIndex, AST_FUNCTION_ROOT);
if (node->right == NULL) return NULL;
node->endingIndex = node->right->endingIndex;🔗 Analysis chain
Ensure node->right and node->endingIndex are valid
Assuming node->right and node->right->endingIndex are non-null can cause crashes if parseNodes fails. Consider adding safety checks before assigning node->endingIndex.
Let me analyze the parseNodes function and its error handling to verify this concern.
Let me check the implementation of parseNodes and its error handling to better understand if it can return NULL.
Let me try a different approach to find the error handling in the parser.
🏁 Scripts executed
The following scripts were executed for the analysis:
Error: No shell scripts found
Script:
#!/bin/bash
# Search for parseNodes function definition and its return value handling
ast-grep --pattern 'ASTNode* parseNodes($$$)'
# Also search for any NULL checks on parseNodes result
rg "parseNodes\(" -A 5 -B 5
Length of output: 3584
Script:
#!/bin/bash
# Look for NULL returns in parseNodes implementation
rg "return NULL" -B 10 src/parser/parser.c
# Look for the createASTNode function since it's used in parseNodes
ast-grep --pattern 'AST_NODE* createASTNode($$$)'
Length of output: 96
Script:
#!/bin/bash
# Search for createASTNode definition and usage
rg "createASTNode" -A 5 -B 5
# Look for error handling patterns in functions.c
rg "return NULL|return node" -B 10 src/parser/asts/functions.c
Length of output: 12766
| fptr = fopen("output.txt", "w"); | ||
|
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| endTimer(i, 3); | ||
|
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| startTimer(); | ||
|
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| fptr = fopen("output.txt", "w"); | ||
| fprintf(fptr, compiled); | ||
| fclose(fptr); | ||
| IR_CTX* ctx = makeContext(node); | ||
| compile(ctx, fptr); | ||
|
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| endTimer(i, 4); | ||
| fclose(fptr); | ||
|
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| free(compiled); | ||
| endTimer(i, 3); |
There was a problem hiding this comment.
💡 Codebase verification
Add error handling for IR context creation and file operations
The codebase shows inconsistent error handling patterns. While src/cli/main.c properly checks for both file operations (fopen) and IR context creation (makeContext), the benchmark code lacks these safety checks. Add the following error handling:
- Check if
fopenreturns NULL for the output file - Verify if
makeContextreturns NULL, as seen intests/ir.candsrc/cli/main.c
🔗 Analysis chain
Consolidate compilation steps
Opening the file, creating the IR context, compiling, and closing the file are well-structured. Double-check error handling (e.g., verify IR_CTX != NULL) for production readiness.
Let me gather information about error handling in the codebase, particularly around IR_CTX creation and file operations.
🏁 Scripts executed
The following scripts were executed for the analysis:
Error: No shell scripts found
Script:
#!/bin/bash
# Check IR_CTX creation and error handling patterns
ast-grep --pattern 'makeContext($_)'
# Look for error handling patterns around fopen
rg "fopen.*\(" -A 3
# Check IR_CTX struct definition and related error handling
rg "IR_CTX" -A 3
Length of output: 2457
| clean: | ||
| $(RM) build | ||
| $(RM) $(TARGET) | ||
| $(RM) $(TEST_TARGET) | ||
| $(RM) $(BENCH_TARGET) |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Add .PHONY declaration for the clean target
The clean target should be declared as .PHONY to ensure it runs even if a file named 'clean' exists in the directory. This is a common Makefile best practice.
Add this line at the beginning of the Makefile:
+.PHONY: cleanCommittable suggestion skipped: line range outside the PR's diff.
Summary by CodeRabbit
New Features
cleantarget for build cleanup.Bug Fixes
valueSizein AST nodes.Documentation
Chores