[LLVMbugs] [Bug 18109] New: Malloc error "pointer being freed was not allocated".
bugzilla-daemon at llvm.org
bugzilla-daemon at llvm.org
Mon Dec 2 04:22:43 PST 2013
http://llvm.org/bugs/show_bug.cgi?id=18109
Bug ID: 18109
Summary: Malloc error "pointer being freed was not allocated".
Product: clang
Version: trunk
Hardware: PC
OS: MacOS X
Status: NEW
Severity: normal
Priority: P
Component: Static Analyzer
Assignee: kremenek at apple.com
Reporter: hr.deepak at tcs.com
CC: llvmbugs at cs.uiuc.edu
Classification: Unclassified
Created attachment 11642
--> http://llvm.org/bugs/attachment.cgi?id=11642&action=edit
PluginChecker.cpp: Source code of plugin. .so: plugin build, example.c: C code
on which test is to done error.txt: dump on the terminal run, failure folder
built by clang.
I was trying to build a simple plugin for static analyzer of clang. The plugin
will simply report all the printf function call in a given .c file. It may not
do anything fruitful, but a simple start for me.
I was able to build a dynamic library with the following command.
g++ -share -fPIC -I~/static_plugin/llvm/include
-I~static_plugin/build/include -D_DEBUG -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS
-D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -g -fvisibility-inlines-hidden
-fno-exceptions -fno-rtti -fno-common -Woverloaded-virtual -Wcast-qual
-I~/static_plugin/llvm/tools/clang/include
-I~/static_plugin/build/tools/clang/include
-L~/static_plugin/build/Debug+Asserts/lib -lz -lpthread -lcurses -lm -undefined
dynamic_lookup -o PrintfChecker.so PrintfChecker.cpp
When I tested it on a sample C code containing a printf call, a runtime error
is generated. I have attached the error message dumped on terminal as
error.txt. I have also attached the failure folder as zip and the C code as
example.c. I used the following cmd to test the C code.
./static_plugin/llvm/tools/clang/tools/scan-build/scan-build
--use-analyzer=~/static_plugin/build/Debug+Asserts/bin/clang -load-plugin
./PrintfChecker.so -enable-checker security.PrintfChecker gcc -c example.c
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