GCC的--wrap是一个链接器选项,假如我们要编译的源文件为main.c,编译命令如下: #include <stdio.h> #include <stdlib.h> #include <string.h> void* __wrap_malloc(size_t size) { printf("call __wrap_malloc , size %ld \n", size); return __real_malloc(size); } void main(void) { char*...
-Wl,–wrap,symbol 下面以常用的malloc函数为例说明: // wrap.c #include <stdio.h> #include <stdlib.h> void* __real_malloc(size_t size); // 只声明不定义__real_malloc void* __wrap_malloc(size_t size) // 定义__wrap_malloc { printf("__wrap_malloc called, size:%zd\n", size); /...
-Wl 用来向链接器指定参数 gcc -Wl, --wrap,malloc -Wl,--wrap,free -o int1 A.o B.o 则链接器的参数会有两个--wrap malloc --wrap free可以看到--wrap,free变成了--wrap free也就是,变成了空格
gcc-Wl,--wrap,malloc-Wl,--wrap,free-o myprog myprog.c mymalloc.c 那么一定会报错,因为你__real_malloc的输出最后会变成32位的,然后你最后去free一个本应该是64位的地址,那一定报错
int __wrap_fstat(int fd, struct stat *statbuf) { // pretend this always succeeds return 0; } Edit: As requested, here are some more details: Configure script: CFLAGS="-g --static" LDFLAGS="-Wl,--wrap=socket -Wl,--wrap=bind -Wl,--wrap=accept -Wl,--wrap=send -...
app : wrap_main.c echo ${PWD} cd ~/path/to/awk/build && gcc -g -Wall -Wl,--wrap,main -pedantic -Wcast-qual -O2 ${PWD}/wrap_main.c awkgram.tab.o b.o main.o parse.o proctab.o tran.o lib.o run.o lex.o -lm -o ${PWD}/app ...
gcc -Wl,--wrap=foo -Wl,--wrap=bar ... The problem I'm having is that this only takes effect for references to foo and bar from outside of this compilation unit (and resolved at link time). That is, calls to foo and bar from other functions within foo.c d...
/WL /EHsc /kernel ole32.lib shell32.lib kernel32.lib oleaut32.lib Advapi32.lib strmiids.lib user32.lib winmm.lib z:\_C__test\000wtf000.cpp -o z:\_C__test\000wtf000.exe -I c:/_win/vs19btool/VC/Tools/MSVC/14.28.29333/include ...
arm-none-eabi-gcc -Wl,--gc-sections -Wl,--wrap,main -Wl,--wrap,_malloc_r -Wl,--wrap,_free_r -Wl,--wrap,_realloc_r -Wl,--wrap,_memalign_r -Wl,--wrap,_calloc_r -Wl,--wrap,exit -Wl,--wrap,atexit -Wl,-n -mcpu=cortex-m7 -mthumb -mfpu=fpv5-d16 -mfloat-abi=softfp ...
set(link_flags "${link_flags} -Wl,--wrap=${mock}") endforeach(mock) # define test add_cmocka_test(test_${name} SOURCES test_${name}.c ${ADD_MOCKED_TEST_SOURCES} COMPILE_OPTIONS ${DEFAULT_C_COMPILE_FLAGS} ${ADD_MOCKED_TEST_COMPILE_OPTIONS} ...